2 * Copyright © 2008 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
24 * Keith Packard <keithp@keithp.com>
28 #include <linux/i2c.h>
29 #include <linux/slab.h>
30 #include <linux/export.h>
31 #include <linux/notifier.h>
32 #include <linux/reboot.h>
34 #include <drm/drm_atomic_helper.h>
35 #include <drm/drm_crtc.h>
36 #include <drm/drm_crtc_helper.h>
37 #include <drm/drm_edid.h>
38 #include "intel_drv.h"
39 #include <drm/i915_drm.h>
42 #define DP_LINK_CHECK_TIMEOUT (10 * 1000)
44 /* Compliance test status bits */
45 #define INTEL_DP_RESOLUTION_SHIFT_MASK 0
46 #define INTEL_DP_RESOLUTION_PREFERRED (1 << INTEL_DP_RESOLUTION_SHIFT_MASK)
47 #define INTEL_DP_RESOLUTION_STANDARD (2 << INTEL_DP_RESOLUTION_SHIFT_MASK)
48 #define INTEL_DP_RESOLUTION_FAILSAFE (3 << INTEL_DP_RESOLUTION_SHIFT_MASK)
55 static const struct dp_link_dpll gen4_dpll[] = {
57 { .p1 = 2, .p2 = 10, .n = 2, .m1 = 23, .m2 = 8 } },
59 { .p1 = 1, .p2 = 10, .n = 1, .m1 = 14, .m2 = 2 } }
62 static const struct dp_link_dpll pch_dpll[] = {
64 { .p1 = 2, .p2 = 10, .n = 1, .m1 = 12, .m2 = 9 } },
66 { .p1 = 1, .p2 = 10, .n = 2, .m1 = 14, .m2 = 8 } }
69 static const struct dp_link_dpll vlv_dpll[] = {
71 { .p1 = 3, .p2 = 2, .n = 5, .m1 = 3, .m2 = 81 } },
73 { .p1 = 2, .p2 = 2, .n = 1, .m1 = 2, .m2 = 27 } }
77 * CHV supports eDP 1.4 that have more link rates.
78 * Below only provides the fixed rate but exclude variable rate.
80 static const struct dp_link_dpll chv_dpll[] = {
82 * CHV requires to program fractional division for m2.
83 * m2 is stored in fixed point format using formula below
84 * (m2_int << 22) | m2_fraction
86 { 162000, /* m2_int = 32, m2_fraction = 1677722 */
87 { .p1 = 4, .p2 = 2, .n = 1, .m1 = 2, .m2 = 0x819999a } },
88 { 270000, /* m2_int = 27, m2_fraction = 0 */
89 { .p1 = 4, .p2 = 1, .n = 1, .m1 = 2, .m2 = 0x6c00000 } },
90 { 540000, /* m2_int = 27, m2_fraction = 0 */
91 { .p1 = 2, .p2 = 1, .n = 1, .m1 = 2, .m2 = 0x6c00000 } }
94 static const int bxt_rates[] = { 162000, 216000, 243000, 270000,
95 324000, 432000, 540000 };
96 static const int skl_rates[] = { 162000, 216000, 270000,
97 324000, 432000, 540000 };
98 static const int default_rates[] = { 162000, 270000, 540000 };
101 * is_edp - is the given port attached to an eDP panel (either CPU or PCH)
102 * @intel_dp: DP struct
104 * If a CPU or PCH DP output is attached to an eDP panel, this function
105 * will return true, and false otherwise.
107 static bool is_edp(struct intel_dp *intel_dp)
109 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
111 return intel_dig_port->base.type == INTEL_OUTPUT_EDP;
114 static struct drm_device *intel_dp_to_dev(struct intel_dp *intel_dp)
116 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
118 return intel_dig_port->base.base.dev;
121 static struct intel_dp *intel_attached_dp(struct drm_connector *connector)
123 return enc_to_intel_dp(&intel_attached_encoder(connector)->base);
126 static void intel_dp_link_down(struct intel_dp *intel_dp);
127 static bool edp_panel_vdd_on(struct intel_dp *intel_dp);
128 static void edp_panel_vdd_off(struct intel_dp *intel_dp, bool sync);
129 static void vlv_init_panel_power_sequencer(struct intel_dp *intel_dp);
130 static void vlv_steal_power_sequencer(struct drm_device *dev,
132 static void intel_dp_unset_edid(struct intel_dp *intel_dp);
135 intel_dp_max_link_bw(struct intel_dp *intel_dp)
137 int max_link_bw = intel_dp->dpcd[DP_MAX_LINK_RATE];
139 switch (max_link_bw) {
140 case DP_LINK_BW_1_62:
145 WARN(1, "invalid max DP link bw val %x, using 1.62Gbps\n",
147 max_link_bw = DP_LINK_BW_1_62;
153 static u8 intel_dp_max_lane_count(struct intel_dp *intel_dp)
155 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
156 u8 source_max, sink_max;
158 source_max = intel_dig_port->max_lanes;
159 sink_max = drm_dp_max_lane_count(intel_dp->dpcd);
161 return min(source_max, sink_max);
165 * The units on the numbers in the next two are... bizarre. Examples will
166 * make it clearer; this one parallels an example in the eDP spec.
168 * intel_dp_max_data_rate for one lane of 2.7GHz evaluates as:
170 * 270000 * 1 * 8 / 10 == 216000
172 * The actual data capacity of that configuration is 2.16Gbit/s, so the
173 * units are decakilobits. ->clock in a drm_display_mode is in kilohertz -
174 * or equivalently, kilopixels per second - so for 1680x1050R it'd be
175 * 119000. At 18bpp that's 2142000 kilobits per second.
177 * Thus the strange-looking division by 10 in intel_dp_link_required, to
178 * get the result in decakilobits instead of kilobits.
182 intel_dp_link_required(int pixel_clock, int bpp)
184 return (pixel_clock * bpp + 9) / 10;
188 intel_dp_max_data_rate(int max_link_clock, int max_lanes)
190 return (max_link_clock * max_lanes * 8) / 10;
193 static enum drm_mode_status
194 intel_dp_mode_valid(struct drm_connector *connector,
195 struct drm_display_mode *mode)
197 struct intel_dp *intel_dp = intel_attached_dp(connector);
198 struct intel_connector *intel_connector = to_intel_connector(connector);
199 struct drm_display_mode *fixed_mode = intel_connector->panel.fixed_mode;
200 int target_clock = mode->clock;
201 int max_rate, mode_rate, max_lanes, max_link_clock;
202 int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
204 if (is_edp(intel_dp) && fixed_mode) {
205 if (mode->hdisplay > fixed_mode->hdisplay)
208 if (mode->vdisplay > fixed_mode->vdisplay)
211 target_clock = fixed_mode->clock;
214 max_link_clock = intel_dp_max_link_rate(intel_dp);
215 max_lanes = intel_dp_max_lane_count(intel_dp);
217 max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes);
218 mode_rate = intel_dp_link_required(target_clock, 18);
220 if (mode_rate > max_rate || target_clock > max_dotclk)
221 return MODE_CLOCK_HIGH;
223 if (mode->clock < 10000)
224 return MODE_CLOCK_LOW;
226 if (mode->flags & DRM_MODE_FLAG_DBLCLK)
227 return MODE_H_ILLEGAL;
232 uint32_t intel_dp_pack_aux(const uint8_t *src, int src_bytes)
239 for (i = 0; i < src_bytes; i++)
240 v |= ((uint32_t) src[i]) << ((3-i) * 8);
244 static void intel_dp_unpack_aux(uint32_t src, uint8_t *dst, int dst_bytes)
249 for (i = 0; i < dst_bytes; i++)
250 dst[i] = src >> ((3-i) * 8);
254 intel_dp_init_panel_power_sequencer(struct drm_device *dev,
255 struct intel_dp *intel_dp);
257 intel_dp_init_panel_power_sequencer_registers(struct drm_device *dev,
258 struct intel_dp *intel_dp);
260 static void pps_lock(struct intel_dp *intel_dp)
262 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
263 struct intel_encoder *encoder = &intel_dig_port->base;
264 struct drm_device *dev = encoder->base.dev;
265 struct drm_i915_private *dev_priv = to_i915(dev);
266 enum intel_display_power_domain power_domain;
269 * See vlv_power_sequencer_reset() why we need
270 * a power domain reference here.
272 power_domain = intel_display_port_aux_power_domain(encoder);
273 intel_display_power_get(dev_priv, power_domain);
275 mutex_lock(&dev_priv->pps_mutex);
278 static void pps_unlock(struct intel_dp *intel_dp)
280 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
281 struct intel_encoder *encoder = &intel_dig_port->base;
282 struct drm_device *dev = encoder->base.dev;
283 struct drm_i915_private *dev_priv = to_i915(dev);
284 enum intel_display_power_domain power_domain;
286 mutex_unlock(&dev_priv->pps_mutex);
288 power_domain = intel_display_port_aux_power_domain(encoder);
289 intel_display_power_put(dev_priv, power_domain);
293 vlv_power_sequencer_kick(struct intel_dp *intel_dp)
295 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
296 struct drm_device *dev = intel_dig_port->base.base.dev;
297 struct drm_i915_private *dev_priv = to_i915(dev);
298 enum pipe pipe = intel_dp->pps_pipe;
299 bool pll_enabled, release_cl_override = false;
300 enum dpio_phy phy = DPIO_PHY(pipe);
301 enum dpio_channel ch = vlv_pipe_to_channel(pipe);
304 if (WARN(I915_READ(intel_dp->output_reg) & DP_PORT_EN,
305 "skipping pipe %c power seqeuncer kick due to port %c being active\n",
306 pipe_name(pipe), port_name(intel_dig_port->port)))
309 DRM_DEBUG_KMS("kicking pipe %c power sequencer for port %c\n",
310 pipe_name(pipe), port_name(intel_dig_port->port));
312 /* Preserve the BIOS-computed detected bit. This is
313 * supposed to be read-only.
315 DP = I915_READ(intel_dp->output_reg) & DP_DETECTED;
316 DP |= DP_VOLTAGE_0_4 | DP_PRE_EMPHASIS_0;
317 DP |= DP_PORT_WIDTH(1);
318 DP |= DP_LINK_TRAIN_PAT_1;
320 if (IS_CHERRYVIEW(dev))
321 DP |= DP_PIPE_SELECT_CHV(pipe);
322 else if (pipe == PIPE_B)
323 DP |= DP_PIPEB_SELECT;
325 pll_enabled = I915_READ(DPLL(pipe)) & DPLL_VCO_ENABLE;
328 * The DPLL for the pipe must be enabled for this to work.
329 * So enable temporarily it if it's not already enabled.
332 release_cl_override = IS_CHERRYVIEW(dev) &&
333 !chv_phy_powergate_ch(dev_priv, phy, ch, true);
335 if (vlv_force_pll_on(dev, pipe, IS_CHERRYVIEW(dev) ?
336 &chv_dpll[0].dpll : &vlv_dpll[0].dpll)) {
337 DRM_ERROR("Failed to force on pll for pipe %c!\n",
344 * Similar magic as in intel_dp_enable_port().
345 * We _must_ do this port enable + disable trick
346 * to make this power seqeuencer lock onto the port.
347 * Otherwise even VDD force bit won't work.
349 I915_WRITE(intel_dp->output_reg, DP);
350 POSTING_READ(intel_dp->output_reg);
352 I915_WRITE(intel_dp->output_reg, DP | DP_PORT_EN);
353 POSTING_READ(intel_dp->output_reg);
355 I915_WRITE(intel_dp->output_reg, DP & ~DP_PORT_EN);
356 POSTING_READ(intel_dp->output_reg);
359 vlv_force_pll_off(dev, pipe);
361 if (release_cl_override)
362 chv_phy_powergate_ch(dev_priv, phy, ch, false);
367 vlv_power_sequencer_pipe(struct intel_dp *intel_dp)
369 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
370 struct drm_device *dev = intel_dig_port->base.base.dev;
371 struct drm_i915_private *dev_priv = to_i915(dev);
372 struct intel_encoder *encoder;
373 unsigned int pipes = (1 << PIPE_A) | (1 << PIPE_B);
376 lockdep_assert_held(&dev_priv->pps_mutex);
378 /* We should never land here with regular DP ports */
379 WARN_ON(!is_edp(intel_dp));
381 if (intel_dp->pps_pipe != INVALID_PIPE)
382 return intel_dp->pps_pipe;
385 * We don't have power sequencer currently.
386 * Pick one that's not used by other ports.
388 for_each_intel_encoder(dev, encoder) {
389 struct intel_dp *tmp;
391 if (encoder->type != INTEL_OUTPUT_EDP)
394 tmp = enc_to_intel_dp(&encoder->base);
396 if (tmp->pps_pipe != INVALID_PIPE)
397 pipes &= ~(1 << tmp->pps_pipe);
401 * Didn't find one. This should not happen since there
402 * are two power sequencers and up to two eDP ports.
404 if (WARN_ON(pipes == 0))
407 pipe = ffs(pipes) - 1;
409 vlv_steal_power_sequencer(dev, pipe);
410 intel_dp->pps_pipe = pipe;
412 DRM_DEBUG_KMS("picked pipe %c power sequencer for port %c\n",
413 pipe_name(intel_dp->pps_pipe),
414 port_name(intel_dig_port->port));
416 /* init power sequencer on this pipe and port */
417 intel_dp_init_panel_power_sequencer(dev, intel_dp);
418 intel_dp_init_panel_power_sequencer_registers(dev, intel_dp);
421 * Even vdd force doesn't work until we've made
422 * the power sequencer lock in on the port.
424 vlv_power_sequencer_kick(intel_dp);
426 return intel_dp->pps_pipe;
430 bxt_power_sequencer_idx(struct intel_dp *intel_dp)
432 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
433 struct drm_device *dev = intel_dig_port->base.base.dev;
434 struct drm_i915_private *dev_priv = to_i915(dev);
436 lockdep_assert_held(&dev_priv->pps_mutex);
438 /* We should never land here with regular DP ports */
439 WARN_ON(!is_edp(intel_dp));
442 * TODO: BXT has 2 PPS instances. The correct port->PPS instance
443 * mapping needs to be retrieved from VBT, for now just hard-code to
444 * use instance #0 always.
446 if (!intel_dp->pps_reset)
449 intel_dp->pps_reset = false;
452 * Only the HW needs to be reprogrammed, the SW state is fixed and
453 * has been setup during connector init.
455 intel_dp_init_panel_power_sequencer_registers(dev, intel_dp);
460 typedef bool (*vlv_pipe_check)(struct drm_i915_private *dev_priv,
463 static bool vlv_pipe_has_pp_on(struct drm_i915_private *dev_priv,
466 return I915_READ(VLV_PIPE_PP_STATUS(pipe)) & PP_ON;
469 static bool vlv_pipe_has_vdd_on(struct drm_i915_private *dev_priv,
472 return I915_READ(VLV_PIPE_PP_CONTROL(pipe)) & EDP_FORCE_VDD;
475 static bool vlv_pipe_any(struct drm_i915_private *dev_priv,
482 vlv_initial_pps_pipe(struct drm_i915_private *dev_priv,
484 vlv_pipe_check pipe_check)
488 for (pipe = PIPE_A; pipe <= PIPE_B; pipe++) {
489 u32 port_sel = I915_READ(VLV_PIPE_PP_ON_DELAYS(pipe)) &
490 PANEL_PORT_SELECT_MASK;
492 if (port_sel != PANEL_PORT_SELECT_VLV(port))
495 if (!pipe_check(dev_priv, pipe))
505 vlv_initial_power_sequencer_setup(struct intel_dp *intel_dp)
507 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
508 struct drm_device *dev = intel_dig_port->base.base.dev;
509 struct drm_i915_private *dev_priv = to_i915(dev);
510 enum port port = intel_dig_port->port;
512 lockdep_assert_held(&dev_priv->pps_mutex);
514 /* try to find a pipe with this port selected */
515 /* first pick one where the panel is on */
516 intel_dp->pps_pipe = vlv_initial_pps_pipe(dev_priv, port,
518 /* didn't find one? pick one where vdd is on */
519 if (intel_dp->pps_pipe == INVALID_PIPE)
520 intel_dp->pps_pipe = vlv_initial_pps_pipe(dev_priv, port,
521 vlv_pipe_has_vdd_on);
522 /* didn't find one? pick one with just the correct port */
523 if (intel_dp->pps_pipe == INVALID_PIPE)
524 intel_dp->pps_pipe = vlv_initial_pps_pipe(dev_priv, port,
527 /* didn't find one? just let vlv_power_sequencer_pipe() pick one when needed */
528 if (intel_dp->pps_pipe == INVALID_PIPE) {
529 DRM_DEBUG_KMS("no initial power sequencer for port %c\n",
534 DRM_DEBUG_KMS("initial power sequencer for port %c: pipe %c\n",
535 port_name(port), pipe_name(intel_dp->pps_pipe));
537 intel_dp_init_panel_power_sequencer(dev, intel_dp);
538 intel_dp_init_panel_power_sequencer_registers(dev, intel_dp);
541 void intel_power_sequencer_reset(struct drm_i915_private *dev_priv)
543 struct drm_device *dev = &dev_priv->drm;
544 struct intel_encoder *encoder;
546 if (WARN_ON(!IS_VALLEYVIEW(dev) && !IS_CHERRYVIEW(dev) &&
551 * We can't grab pps_mutex here due to deadlock with power_domain
552 * mutex when power_domain functions are called while holding pps_mutex.
553 * That also means that in order to use pps_pipe the code needs to
554 * hold both a power domain reference and pps_mutex, and the power domain
555 * reference get/put must be done while _not_ holding pps_mutex.
556 * pps_{lock,unlock}() do these steps in the correct order, so one
557 * should use them always.
560 for_each_intel_encoder(dev, encoder) {
561 struct intel_dp *intel_dp;
563 if (encoder->type != INTEL_OUTPUT_EDP)
566 intel_dp = enc_to_intel_dp(&encoder->base);
568 intel_dp->pps_reset = true;
570 intel_dp->pps_pipe = INVALID_PIPE;
574 struct pps_registers {
582 static void intel_pps_get_registers(struct drm_i915_private *dev_priv,
583 struct intel_dp *intel_dp,
584 struct pps_registers *regs)
586 memset(regs, 0, sizeof(*regs));
588 if (IS_BROXTON(dev_priv)) {
589 int idx = bxt_power_sequencer_idx(intel_dp);
591 regs->pp_ctrl = BXT_PP_CONTROL(idx);
592 regs->pp_stat = BXT_PP_STATUS(idx);
593 regs->pp_on = BXT_PP_ON_DELAYS(idx);
594 regs->pp_off = BXT_PP_OFF_DELAYS(idx);
595 } else if (HAS_PCH_SPLIT(dev_priv)) {
596 regs->pp_ctrl = PCH_PP_CONTROL;
597 regs->pp_stat = PCH_PP_STATUS;
598 regs->pp_on = PCH_PP_ON_DELAYS;
599 regs->pp_off = PCH_PP_OFF_DELAYS;
600 regs->pp_div = PCH_PP_DIVISOR;
602 enum pipe pipe = vlv_power_sequencer_pipe(intel_dp);
604 regs->pp_ctrl = VLV_PIPE_PP_CONTROL(pipe);
605 regs->pp_stat = VLV_PIPE_PP_STATUS(pipe);
606 regs->pp_on = VLV_PIPE_PP_ON_DELAYS(pipe);
607 regs->pp_off = VLV_PIPE_PP_OFF_DELAYS(pipe);
608 regs->pp_div = VLV_PIPE_PP_DIVISOR(pipe);
613 _pp_ctrl_reg(struct intel_dp *intel_dp)
615 struct pps_registers regs;
617 intel_pps_get_registers(to_i915(intel_dp_to_dev(intel_dp)), intel_dp,
624 _pp_stat_reg(struct intel_dp *intel_dp)
626 struct pps_registers regs;
628 intel_pps_get_registers(to_i915(intel_dp_to_dev(intel_dp)), intel_dp,
634 /* Reboot notifier handler to shutdown panel power to guarantee T12 timing
635 This function only applicable when panel PM state is not to be tracked */
636 static int edp_notify_handler(struct notifier_block *this, unsigned long code,
639 struct intel_dp *intel_dp = container_of(this, typeof(* intel_dp),
641 struct drm_device *dev = intel_dp_to_dev(intel_dp);
642 struct drm_i915_private *dev_priv = to_i915(dev);
644 if (!is_edp(intel_dp) || code != SYS_RESTART)
649 if (IS_VALLEYVIEW(dev) || IS_CHERRYVIEW(dev)) {
650 enum pipe pipe = vlv_power_sequencer_pipe(intel_dp);
651 i915_reg_t pp_ctrl_reg, pp_div_reg;
654 pp_ctrl_reg = VLV_PIPE_PP_CONTROL(pipe);
655 pp_div_reg = VLV_PIPE_PP_DIVISOR(pipe);
656 pp_div = I915_READ(pp_div_reg);
657 pp_div &= PP_REFERENCE_DIVIDER_MASK;
659 /* 0x1F write to PP_DIV_REG sets max cycle delay */
660 I915_WRITE(pp_div_reg, pp_div | 0x1F);
661 I915_WRITE(pp_ctrl_reg, PANEL_UNLOCK_REGS | PANEL_POWER_OFF);
662 msleep(intel_dp->panel_power_cycle_delay);
665 pps_unlock(intel_dp);
670 static bool edp_have_panel_power(struct intel_dp *intel_dp)
672 struct drm_device *dev = intel_dp_to_dev(intel_dp);
673 struct drm_i915_private *dev_priv = to_i915(dev);
675 lockdep_assert_held(&dev_priv->pps_mutex);
677 if ((IS_VALLEYVIEW(dev) || IS_CHERRYVIEW(dev)) &&
678 intel_dp->pps_pipe == INVALID_PIPE)
681 return (I915_READ(_pp_stat_reg(intel_dp)) & PP_ON) != 0;
684 static bool edp_have_panel_vdd(struct intel_dp *intel_dp)
686 struct drm_device *dev = intel_dp_to_dev(intel_dp);
687 struct drm_i915_private *dev_priv = to_i915(dev);
689 lockdep_assert_held(&dev_priv->pps_mutex);
691 if ((IS_VALLEYVIEW(dev) || IS_CHERRYVIEW(dev)) &&
692 intel_dp->pps_pipe == INVALID_PIPE)
695 return I915_READ(_pp_ctrl_reg(intel_dp)) & EDP_FORCE_VDD;
699 intel_dp_check_edp(struct intel_dp *intel_dp)
701 struct drm_device *dev = intel_dp_to_dev(intel_dp);
702 struct drm_i915_private *dev_priv = to_i915(dev);
704 if (!is_edp(intel_dp))
707 if (!edp_have_panel_power(intel_dp) && !edp_have_panel_vdd(intel_dp)) {
708 WARN(1, "eDP powered off while attempting aux channel communication.\n");
709 DRM_DEBUG_KMS("Status 0x%08x Control 0x%08x\n",
710 I915_READ(_pp_stat_reg(intel_dp)),
711 I915_READ(_pp_ctrl_reg(intel_dp)));
716 intel_dp_aux_wait_done(struct intel_dp *intel_dp, bool has_aux_irq)
718 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
719 struct drm_device *dev = intel_dig_port->base.base.dev;
720 struct drm_i915_private *dev_priv = to_i915(dev);
721 i915_reg_t ch_ctl = intel_dp->aux_ch_ctl_reg;
725 #define C (((status = I915_READ_NOTRACE(ch_ctl)) & DP_AUX_CH_CTL_SEND_BUSY) == 0)
727 done = wait_event_timeout(dev_priv->gmbus_wait_queue, C,
728 msecs_to_jiffies_timeout(10));
730 done = wait_for(C, 10) == 0;
732 DRM_ERROR("dp aux hw did not signal timeout (has irq: %i)!\n",
739 static uint32_t g4x_get_aux_clock_divider(struct intel_dp *intel_dp, int index)
741 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
742 struct drm_i915_private *dev_priv = to_i915(intel_dig_port->base.base.dev);
748 * The clock divider is based off the hrawclk, and would like to run at
749 * 2MHz. So, take the hrawclk value and divide by 2000 and use that
751 return DIV_ROUND_CLOSEST(dev_priv->rawclk_freq, 2000);
754 static uint32_t ilk_get_aux_clock_divider(struct intel_dp *intel_dp, int index)
756 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
757 struct drm_i915_private *dev_priv = to_i915(intel_dig_port->base.base.dev);
763 * The clock divider is based off the cdclk or PCH rawclk, and would
764 * like to run at 2MHz. So, take the cdclk or PCH rawclk value and
765 * divide by 2000 and use that
767 if (intel_dig_port->port == PORT_A)
768 return DIV_ROUND_CLOSEST(dev_priv->cdclk_freq, 2000);
770 return DIV_ROUND_CLOSEST(dev_priv->rawclk_freq, 2000);
773 static uint32_t hsw_get_aux_clock_divider(struct intel_dp *intel_dp, int index)
775 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
776 struct drm_i915_private *dev_priv = to_i915(intel_dig_port->base.base.dev);
778 if (intel_dig_port->port != PORT_A && HAS_PCH_LPT_H(dev_priv)) {
779 /* Workaround for non-ULT HSW */
787 return ilk_get_aux_clock_divider(intel_dp, index);
790 static uint32_t skl_get_aux_clock_divider(struct intel_dp *intel_dp, int index)
793 * SKL doesn't need us to program the AUX clock divider (Hardware will
794 * derive the clock from CDCLK automatically). We still implement the
795 * get_aux_clock_divider vfunc to plug-in into the existing code.
797 return index ? 0 : 1;
800 static uint32_t g4x_get_aux_send_ctl(struct intel_dp *intel_dp,
803 uint32_t aux_clock_divider)
805 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
806 struct drm_device *dev = intel_dig_port->base.base.dev;
807 uint32_t precharge, timeout;
814 if (IS_BROADWELL(dev) && intel_dig_port->port == PORT_A)
815 timeout = DP_AUX_CH_CTL_TIME_OUT_600us;
817 timeout = DP_AUX_CH_CTL_TIME_OUT_400us;
819 return DP_AUX_CH_CTL_SEND_BUSY |
821 (has_aux_irq ? DP_AUX_CH_CTL_INTERRUPT : 0) |
822 DP_AUX_CH_CTL_TIME_OUT_ERROR |
824 DP_AUX_CH_CTL_RECEIVE_ERROR |
825 (send_bytes << DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT) |
826 (precharge << DP_AUX_CH_CTL_PRECHARGE_2US_SHIFT) |
827 (aux_clock_divider << DP_AUX_CH_CTL_BIT_CLOCK_2X_SHIFT);
830 static uint32_t skl_get_aux_send_ctl(struct intel_dp *intel_dp,
835 return DP_AUX_CH_CTL_SEND_BUSY |
837 (has_aux_irq ? DP_AUX_CH_CTL_INTERRUPT : 0) |
838 DP_AUX_CH_CTL_TIME_OUT_ERROR |
839 DP_AUX_CH_CTL_TIME_OUT_1600us |
840 DP_AUX_CH_CTL_RECEIVE_ERROR |
841 (send_bytes << DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT) |
842 DP_AUX_CH_CTL_FW_SYNC_PULSE_SKL(32) |
843 DP_AUX_CH_CTL_SYNC_PULSE_SKL(32);
847 intel_dp_aux_ch(struct intel_dp *intel_dp,
848 const uint8_t *send, int send_bytes,
849 uint8_t *recv, int recv_size)
851 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
852 struct drm_device *dev = intel_dig_port->base.base.dev;
853 struct drm_i915_private *dev_priv = to_i915(dev);
854 i915_reg_t ch_ctl = intel_dp->aux_ch_ctl_reg;
855 uint32_t aux_clock_divider;
856 int i, ret, recv_bytes;
859 bool has_aux_irq = HAS_AUX_IRQ(dev);
865 * We will be called with VDD already enabled for dpcd/edid/oui reads.
866 * In such cases we want to leave VDD enabled and it's up to upper layers
867 * to turn it off. But for eg. i2c-dev access we need to turn it on/off
870 vdd = edp_panel_vdd_on(intel_dp);
872 /* dp aux is extremely sensitive to irq latency, hence request the
873 * lowest possible wakeup latency and so prevent the cpu from going into
876 pm_qos_update_request(&dev_priv->pm_qos, 0);
878 intel_dp_check_edp(intel_dp);
880 /* Try to wait for any previous AUX channel activity */
881 for (try = 0; try < 3; try++) {
882 status = I915_READ_NOTRACE(ch_ctl);
883 if ((status & DP_AUX_CH_CTL_SEND_BUSY) == 0)
889 static u32 last_status = -1;
890 const u32 status = I915_READ(ch_ctl);
892 if (status != last_status) {
893 WARN(1, "dp_aux_ch not started status 0x%08x\n",
895 last_status = status;
902 /* Only 5 data registers! */
903 if (WARN_ON(send_bytes > 20 || recv_size > 20)) {
908 while ((aux_clock_divider = intel_dp->get_aux_clock_divider(intel_dp, clock++))) {
909 u32 send_ctl = intel_dp->get_aux_send_ctl(intel_dp,
914 /* Must try at least 3 times according to DP spec */
915 for (try = 0; try < 5; try++) {
916 /* Load the send data into the aux channel data registers */
917 for (i = 0; i < send_bytes; i += 4)
918 I915_WRITE(intel_dp->aux_ch_data_reg[i >> 2],
919 intel_dp_pack_aux(send + i,
922 /* Send the command and wait for it to complete */
923 I915_WRITE(ch_ctl, send_ctl);
925 status = intel_dp_aux_wait_done(intel_dp, has_aux_irq);
927 /* Clear done status and any errors */
931 DP_AUX_CH_CTL_TIME_OUT_ERROR |
932 DP_AUX_CH_CTL_RECEIVE_ERROR);
934 if (status & DP_AUX_CH_CTL_TIME_OUT_ERROR)
937 /* DP CTS 1.2 Core Rev 1.1, 4.2.1.1 & 4.2.1.2
938 * 400us delay required for errors and timeouts
939 * Timeout errors from the HW already meet this
940 * requirement so skip to next iteration
942 if (status & DP_AUX_CH_CTL_RECEIVE_ERROR) {
943 usleep_range(400, 500);
946 if (status & DP_AUX_CH_CTL_DONE)
951 if ((status & DP_AUX_CH_CTL_DONE) == 0) {
952 DRM_ERROR("dp_aux_ch not done status 0x%08x\n", status);
958 /* Check for timeout or receive error.
959 * Timeouts occur when the sink is not connected
961 if (status & DP_AUX_CH_CTL_RECEIVE_ERROR) {
962 DRM_ERROR("dp_aux_ch receive error status 0x%08x\n", status);
967 /* Timeouts occur when the device isn't connected, so they're
968 * "normal" -- don't fill the kernel log with these */
969 if (status & DP_AUX_CH_CTL_TIME_OUT_ERROR) {
970 DRM_DEBUG_KMS("dp_aux_ch timeout status 0x%08x\n", status);
975 /* Unload any bytes sent back from the other side */
976 recv_bytes = ((status & DP_AUX_CH_CTL_MESSAGE_SIZE_MASK) >>
977 DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT);
980 * By BSpec: "Message sizes of 0 or >20 are not allowed."
981 * We have no idea of what happened so we return -EBUSY so
982 * drm layer takes care for the necessary retries.
984 if (recv_bytes == 0 || recv_bytes > 20) {
985 DRM_DEBUG_KMS("Forbidden recv_bytes = %d on aux transaction\n",
988 * FIXME: This patch was created on top of a series that
989 * organize the retries at drm level. There EBUSY should
990 * also take care for 1ms wait before retrying.
991 * That aux retries re-org is still needed and after that is
992 * merged we remove this sleep from here.
994 usleep_range(1000, 1500);
999 if (recv_bytes > recv_size)
1000 recv_bytes = recv_size;
1002 for (i = 0; i < recv_bytes; i += 4)
1003 intel_dp_unpack_aux(I915_READ(intel_dp->aux_ch_data_reg[i >> 2]),
1004 recv + i, recv_bytes - i);
1008 pm_qos_update_request(&dev_priv->pm_qos, PM_QOS_DEFAULT_VALUE);
1011 edp_panel_vdd_off(intel_dp, false);
1013 pps_unlock(intel_dp);
1018 #define BARE_ADDRESS_SIZE 3
1019 #define HEADER_SIZE (BARE_ADDRESS_SIZE + 1)
1021 intel_dp_aux_transfer(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg)
1023 struct intel_dp *intel_dp = container_of(aux, struct intel_dp, aux);
1024 uint8_t txbuf[20], rxbuf[20];
1025 size_t txsize, rxsize;
1028 txbuf[0] = (msg->request << 4) |
1029 ((msg->address >> 16) & 0xf);
1030 txbuf[1] = (msg->address >> 8) & 0xff;
1031 txbuf[2] = msg->address & 0xff;
1032 txbuf[3] = msg->size - 1;
1034 switch (msg->request & ~DP_AUX_I2C_MOT) {
1035 case DP_AUX_NATIVE_WRITE:
1036 case DP_AUX_I2C_WRITE:
1037 case DP_AUX_I2C_WRITE_STATUS_UPDATE:
1038 txsize = msg->size ? HEADER_SIZE + msg->size : BARE_ADDRESS_SIZE;
1039 rxsize = 2; /* 0 or 1 data bytes */
1041 if (WARN_ON(txsize > 20))
1044 WARN_ON(!msg->buffer != !msg->size);
1047 memcpy(txbuf + HEADER_SIZE, msg->buffer, msg->size);
1049 ret = intel_dp_aux_ch(intel_dp, txbuf, txsize, rxbuf, rxsize);
1051 msg->reply = rxbuf[0] >> 4;
1054 /* Number of bytes written in a short write. */
1055 ret = clamp_t(int, rxbuf[1], 0, msg->size);
1057 /* Return payload size. */
1063 case DP_AUX_NATIVE_READ:
1064 case DP_AUX_I2C_READ:
1065 txsize = msg->size ? HEADER_SIZE : BARE_ADDRESS_SIZE;
1066 rxsize = msg->size + 1;
1068 if (WARN_ON(rxsize > 20))
1071 ret = intel_dp_aux_ch(intel_dp, txbuf, txsize, rxbuf, rxsize);
1073 msg->reply = rxbuf[0] >> 4;
1075 * Assume happy day, and copy the data. The caller is
1076 * expected to check msg->reply before touching it.
1078 * Return payload size.
1081 memcpy(msg->buffer, rxbuf + 1, ret);
1093 static i915_reg_t g4x_aux_ctl_reg(struct drm_i915_private *dev_priv,
1100 return DP_AUX_CH_CTL(port);
1103 return DP_AUX_CH_CTL(PORT_B);
1107 static i915_reg_t g4x_aux_data_reg(struct drm_i915_private *dev_priv,
1108 enum port port, int index)
1114 return DP_AUX_CH_DATA(port, index);
1117 return DP_AUX_CH_DATA(PORT_B, index);
1121 static i915_reg_t ilk_aux_ctl_reg(struct drm_i915_private *dev_priv,
1126 return DP_AUX_CH_CTL(port);
1130 return PCH_DP_AUX_CH_CTL(port);
1133 return DP_AUX_CH_CTL(PORT_A);
1137 static i915_reg_t ilk_aux_data_reg(struct drm_i915_private *dev_priv,
1138 enum port port, int index)
1142 return DP_AUX_CH_DATA(port, index);
1146 return PCH_DP_AUX_CH_DATA(port, index);
1149 return DP_AUX_CH_DATA(PORT_A, index);
1154 * On SKL we don't have Aux for port E so we rely
1155 * on VBT to set a proper alternate aux channel.
1157 static enum port skl_porte_aux_port(struct drm_i915_private *dev_priv)
1159 const struct ddi_vbt_port_info *info =
1160 &dev_priv->vbt.ddi_port_info[PORT_E];
1162 switch (info->alternate_aux_channel) {
1172 MISSING_CASE(info->alternate_aux_channel);
1177 static i915_reg_t skl_aux_ctl_reg(struct drm_i915_private *dev_priv,
1181 port = skl_porte_aux_port(dev_priv);
1188 return DP_AUX_CH_CTL(port);
1191 return DP_AUX_CH_CTL(PORT_A);
1195 static i915_reg_t skl_aux_data_reg(struct drm_i915_private *dev_priv,
1196 enum port port, int index)
1199 port = skl_porte_aux_port(dev_priv);
1206 return DP_AUX_CH_DATA(port, index);
1209 return DP_AUX_CH_DATA(PORT_A, index);
1213 static i915_reg_t intel_aux_ctl_reg(struct drm_i915_private *dev_priv,
1216 if (INTEL_INFO(dev_priv)->gen >= 9)
1217 return skl_aux_ctl_reg(dev_priv, port);
1218 else if (HAS_PCH_SPLIT(dev_priv))
1219 return ilk_aux_ctl_reg(dev_priv, port);
1221 return g4x_aux_ctl_reg(dev_priv, port);
1224 static i915_reg_t intel_aux_data_reg(struct drm_i915_private *dev_priv,
1225 enum port port, int index)
1227 if (INTEL_INFO(dev_priv)->gen >= 9)
1228 return skl_aux_data_reg(dev_priv, port, index);
1229 else if (HAS_PCH_SPLIT(dev_priv))
1230 return ilk_aux_data_reg(dev_priv, port, index);
1232 return g4x_aux_data_reg(dev_priv, port, index);
1235 static void intel_aux_reg_init(struct intel_dp *intel_dp)
1237 struct drm_i915_private *dev_priv = to_i915(intel_dp_to_dev(intel_dp));
1238 enum port port = dp_to_dig_port(intel_dp)->port;
1241 intel_dp->aux_ch_ctl_reg = intel_aux_ctl_reg(dev_priv, port);
1242 for (i = 0; i < ARRAY_SIZE(intel_dp->aux_ch_data_reg); i++)
1243 intel_dp->aux_ch_data_reg[i] = intel_aux_data_reg(dev_priv, port, i);
1247 intel_dp_aux_fini(struct intel_dp *intel_dp)
1249 kfree(intel_dp->aux.name);
1253 intel_dp_aux_init(struct intel_dp *intel_dp, struct intel_connector *connector)
1255 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
1256 enum port port = intel_dig_port->port;
1258 intel_aux_reg_init(intel_dp);
1259 drm_dp_aux_init(&intel_dp->aux);
1261 /* Failure to allocate our preferred name is not critical */
1262 intel_dp->aux.name = kasprintf(GFP_KERNEL, "DPDDC-%c", port_name(port));
1263 intel_dp->aux.transfer = intel_dp_aux_transfer;
1267 intel_dp_sink_rates(struct intel_dp *intel_dp, const int **sink_rates)
1269 if (intel_dp->num_sink_rates) {
1270 *sink_rates = intel_dp->sink_rates;
1271 return intel_dp->num_sink_rates;
1274 *sink_rates = default_rates;
1276 return (intel_dp_max_link_bw(intel_dp) >> 3) + 1;
1279 bool intel_dp_source_supports_hbr2(struct intel_dp *intel_dp)
1281 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
1282 struct drm_device *dev = dig_port->base.base.dev;
1284 /* WaDisableHBR2:skl */
1285 if (IS_SKL_REVID(dev, 0, SKL_REVID_B0))
1288 if ((IS_HASWELL(dev) && !IS_HSW_ULX(dev)) || IS_BROADWELL(dev) ||
1289 (INTEL_INFO(dev)->gen >= 9))
1296 intel_dp_source_rates(struct intel_dp *intel_dp, const int **source_rates)
1298 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
1299 struct drm_device *dev = dig_port->base.base.dev;
1302 if (IS_BROXTON(dev)) {
1303 *source_rates = bxt_rates;
1304 size = ARRAY_SIZE(bxt_rates);
1305 } else if (IS_SKYLAKE(dev) || IS_KABYLAKE(dev)) {
1306 *source_rates = skl_rates;
1307 size = ARRAY_SIZE(skl_rates);
1309 *source_rates = default_rates;
1310 size = ARRAY_SIZE(default_rates);
1313 /* This depends on the fact that 5.4 is last value in the array */
1314 if (!intel_dp_source_supports_hbr2(intel_dp))
1321 intel_dp_set_clock(struct intel_encoder *encoder,
1322 struct intel_crtc_state *pipe_config)
1324 struct drm_device *dev = encoder->base.dev;
1325 const struct dp_link_dpll *divisor = NULL;
1329 divisor = gen4_dpll;
1330 count = ARRAY_SIZE(gen4_dpll);
1331 } else if (HAS_PCH_SPLIT(dev)) {
1333 count = ARRAY_SIZE(pch_dpll);
1334 } else if (IS_CHERRYVIEW(dev)) {
1336 count = ARRAY_SIZE(chv_dpll);
1337 } else if (IS_VALLEYVIEW(dev)) {
1339 count = ARRAY_SIZE(vlv_dpll);
1342 if (divisor && count) {
1343 for (i = 0; i < count; i++) {
1344 if (pipe_config->port_clock == divisor[i].clock) {
1345 pipe_config->dpll = divisor[i].dpll;
1346 pipe_config->clock_set = true;
1353 static int intersect_rates(const int *source_rates, int source_len,
1354 const int *sink_rates, int sink_len,
1357 int i = 0, j = 0, k = 0;
1359 while (i < source_len && j < sink_len) {
1360 if (source_rates[i] == sink_rates[j]) {
1361 if (WARN_ON(k >= DP_MAX_SUPPORTED_RATES))
1363 common_rates[k] = source_rates[i];
1367 } else if (source_rates[i] < sink_rates[j]) {
1376 static int intel_dp_common_rates(struct intel_dp *intel_dp,
1379 const int *source_rates, *sink_rates;
1380 int source_len, sink_len;
1382 sink_len = intel_dp_sink_rates(intel_dp, &sink_rates);
1383 source_len = intel_dp_source_rates(intel_dp, &source_rates);
1385 return intersect_rates(source_rates, source_len,
1386 sink_rates, sink_len,
1390 static void snprintf_int_array(char *str, size_t len,
1391 const int *array, int nelem)
1397 for (i = 0; i < nelem; i++) {
1398 int r = snprintf(str, len, "%s%d", i ? ", " : "", array[i]);
1406 static void intel_dp_print_rates(struct intel_dp *intel_dp)
1408 const int *source_rates, *sink_rates;
1409 int source_len, sink_len, common_len;
1410 int common_rates[DP_MAX_SUPPORTED_RATES];
1411 char str[128]; /* FIXME: too big for stack? */
1413 if ((drm_debug & DRM_UT_KMS) == 0)
1416 source_len = intel_dp_source_rates(intel_dp, &source_rates);
1417 snprintf_int_array(str, sizeof(str), source_rates, source_len);
1418 DRM_DEBUG_KMS("source rates: %s\n", str);
1420 sink_len = intel_dp_sink_rates(intel_dp, &sink_rates);
1421 snprintf_int_array(str, sizeof(str), sink_rates, sink_len);
1422 DRM_DEBUG_KMS("sink rates: %s\n", str);
1424 common_len = intel_dp_common_rates(intel_dp, common_rates);
1425 snprintf_int_array(str, sizeof(str), common_rates, common_len);
1426 DRM_DEBUG_KMS("common rates: %s\n", str);
1429 static int rate_to_index(int find, const int *rates)
1433 for (i = 0; i < DP_MAX_SUPPORTED_RATES; ++i)
1434 if (find == rates[i])
1441 intel_dp_max_link_rate(struct intel_dp *intel_dp)
1443 int rates[DP_MAX_SUPPORTED_RATES] = {};
1446 len = intel_dp_common_rates(intel_dp, rates);
1447 if (WARN_ON(len <= 0))
1450 return rates[len - 1];
1453 int intel_dp_rate_select(struct intel_dp *intel_dp, int rate)
1455 return rate_to_index(rate, intel_dp->sink_rates);
1458 void intel_dp_compute_rate(struct intel_dp *intel_dp, int port_clock,
1459 uint8_t *link_bw, uint8_t *rate_select)
1461 if (intel_dp->num_sink_rates) {
1464 intel_dp_rate_select(intel_dp, port_clock);
1466 *link_bw = drm_dp_link_rate_to_bw_code(port_clock);
1472 intel_dp_compute_config(struct intel_encoder *encoder,
1473 struct intel_crtc_state *pipe_config)
1475 struct drm_device *dev = encoder->base.dev;
1476 struct drm_i915_private *dev_priv = to_i915(dev);
1477 struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
1478 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
1479 enum port port = dp_to_dig_port(intel_dp)->port;
1480 struct intel_crtc *intel_crtc = to_intel_crtc(pipe_config->base.crtc);
1481 struct intel_connector *intel_connector = intel_dp->attached_connector;
1482 int lane_count, clock;
1483 int min_lane_count = 1;
1484 int max_lane_count = intel_dp_max_lane_count(intel_dp);
1485 /* Conveniently, the link BW constants become indices with a shift...*/
1489 int link_avail, link_clock;
1490 int common_rates[DP_MAX_SUPPORTED_RATES] = {};
1492 uint8_t link_bw, rate_select;
1494 common_len = intel_dp_common_rates(intel_dp, common_rates);
1496 /* No common link rates between source and sink */
1497 WARN_ON(common_len <= 0);
1499 max_clock = common_len - 1;
1501 if (HAS_PCH_SPLIT(dev) && !HAS_DDI(dev) && port != PORT_A)
1502 pipe_config->has_pch_encoder = true;
1504 pipe_config->has_drrs = false;
1505 pipe_config->has_audio = intel_dp->has_audio && port != PORT_A;
1507 if (is_edp(intel_dp) && intel_connector->panel.fixed_mode) {
1508 intel_fixed_panel_mode(intel_connector->panel.fixed_mode,
1511 if (INTEL_INFO(dev)->gen >= 9) {
1513 ret = skl_update_scaler_crtc(pipe_config);
1518 if (HAS_GMCH_DISPLAY(dev))
1519 intel_gmch_panel_fitting(intel_crtc, pipe_config,
1520 intel_connector->panel.fitting_mode);
1522 intel_pch_panel_fitting(intel_crtc, pipe_config,
1523 intel_connector->panel.fitting_mode);
1526 if (adjusted_mode->flags & DRM_MODE_FLAG_DBLCLK)
1529 DRM_DEBUG_KMS("DP link computation with max lane count %i "
1530 "max bw %d pixel clock %iKHz\n",
1531 max_lane_count, common_rates[max_clock],
1532 adjusted_mode->crtc_clock);
1534 /* Walk through all bpp values. Luckily they're all nicely spaced with 2
1535 * bpc in between. */
1536 bpp = pipe_config->pipe_bpp;
1537 if (is_edp(intel_dp)) {
1539 /* Get bpp from vbt only for panels that dont have bpp in edid */
1540 if (intel_connector->base.display_info.bpc == 0 &&
1541 (dev_priv->vbt.edp.bpp && dev_priv->vbt.edp.bpp < bpp)) {
1542 DRM_DEBUG_KMS("clamping bpp for eDP panel to BIOS-provided %i\n",
1543 dev_priv->vbt.edp.bpp);
1544 bpp = dev_priv->vbt.edp.bpp;
1548 * Use the maximum clock and number of lanes the eDP panel
1549 * advertizes being capable of. The panels are generally
1550 * designed to support only a single clock and lane
1551 * configuration, and typically these values correspond to the
1552 * native resolution of the panel.
1554 min_lane_count = max_lane_count;
1555 min_clock = max_clock;
1558 for (; bpp >= 6*3; bpp -= 2*3) {
1559 mode_rate = intel_dp_link_required(adjusted_mode->crtc_clock,
1562 for (clock = min_clock; clock <= max_clock; clock++) {
1563 for (lane_count = min_lane_count;
1564 lane_count <= max_lane_count;
1567 link_clock = common_rates[clock];
1568 link_avail = intel_dp_max_data_rate(link_clock,
1571 if (mode_rate <= link_avail) {
1581 if (intel_dp->color_range_auto) {
1584 * CEA-861-E - 5.1 Default Encoding Parameters
1585 * VESA DisplayPort Ver.1.2a - 5.1.1.1 Video Colorimetry
1587 pipe_config->limited_color_range =
1588 bpp != 18 && drm_match_cea_mode(adjusted_mode) > 1;
1590 pipe_config->limited_color_range =
1591 intel_dp->limited_color_range;
1594 pipe_config->lane_count = lane_count;
1596 pipe_config->pipe_bpp = bpp;
1597 pipe_config->port_clock = common_rates[clock];
1599 intel_dp_compute_rate(intel_dp, pipe_config->port_clock,
1600 &link_bw, &rate_select);
1602 DRM_DEBUG_KMS("DP link bw %02x rate select %02x lane count %d clock %d bpp %d\n",
1603 link_bw, rate_select, pipe_config->lane_count,
1604 pipe_config->port_clock, bpp);
1605 DRM_DEBUG_KMS("DP link bw required %i available %i\n",
1606 mode_rate, link_avail);
1608 intel_link_compute_m_n(bpp, lane_count,
1609 adjusted_mode->crtc_clock,
1610 pipe_config->port_clock,
1611 &pipe_config->dp_m_n);
1613 if (intel_connector->panel.downclock_mode != NULL &&
1614 dev_priv->drrs.type == SEAMLESS_DRRS_SUPPORT) {
1615 pipe_config->has_drrs = true;
1616 intel_link_compute_m_n(bpp, lane_count,
1617 intel_connector->panel.downclock_mode->clock,
1618 pipe_config->port_clock,
1619 &pipe_config->dp_m2_n2);
1623 * DPLL0 VCO may need to be adjusted to get the correct
1624 * clock for eDP. This will affect cdclk as well.
1626 if (is_edp(intel_dp) &&
1627 (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv))) {
1630 switch (pipe_config->port_clock / 2) {
1640 to_intel_atomic_state(pipe_config->base.state)->cdclk_pll_vco = vco;
1644 intel_dp_set_clock(encoder, pipe_config);
1649 void intel_dp_set_link_params(struct intel_dp *intel_dp,
1650 const struct intel_crtc_state *pipe_config)
1652 intel_dp->link_rate = pipe_config->port_clock;
1653 intel_dp->lane_count = pipe_config->lane_count;
1654 intel_dp->link_mst = intel_crtc_has_type(pipe_config, INTEL_OUTPUT_DP_MST);
1657 static void intel_dp_prepare(struct intel_encoder *encoder)
1659 struct drm_device *dev = encoder->base.dev;
1660 struct drm_i915_private *dev_priv = to_i915(dev);
1661 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
1662 enum port port = dp_to_dig_port(intel_dp)->port;
1663 struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
1664 const struct drm_display_mode *adjusted_mode = &crtc->config->base.adjusted_mode;
1666 intel_dp_set_link_params(intel_dp, crtc->config);
1669 * There are four kinds of DP registers:
1676 * IBX PCH and CPU are the same for almost everything,
1677 * except that the CPU DP PLL is configured in this
1680 * CPT PCH is quite different, having many bits moved
1681 * to the TRANS_DP_CTL register instead. That
1682 * configuration happens (oddly) in ironlake_pch_enable
1685 /* Preserve the BIOS-computed detected bit. This is
1686 * supposed to be read-only.
1688 intel_dp->DP = I915_READ(intel_dp->output_reg) & DP_DETECTED;
1690 /* Handle DP bits in common between all three register formats */
1691 intel_dp->DP |= DP_VOLTAGE_0_4 | DP_PRE_EMPHASIS_0;
1692 intel_dp->DP |= DP_PORT_WIDTH(crtc->config->lane_count);
1694 /* Split out the IBX/CPU vs CPT settings */
1696 if (IS_GEN7(dev) && port == PORT_A) {
1697 if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
1698 intel_dp->DP |= DP_SYNC_HS_HIGH;
1699 if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
1700 intel_dp->DP |= DP_SYNC_VS_HIGH;
1701 intel_dp->DP |= DP_LINK_TRAIN_OFF_CPT;
1703 if (drm_dp_enhanced_frame_cap(intel_dp->dpcd))
1704 intel_dp->DP |= DP_ENHANCED_FRAMING;
1706 intel_dp->DP |= crtc->pipe << 29;
1707 } else if (HAS_PCH_CPT(dev) && port != PORT_A) {
1710 intel_dp->DP |= DP_LINK_TRAIN_OFF_CPT;
1712 trans_dp = I915_READ(TRANS_DP_CTL(crtc->pipe));
1713 if (drm_dp_enhanced_frame_cap(intel_dp->dpcd))
1714 trans_dp |= TRANS_DP_ENH_FRAMING;
1716 trans_dp &= ~TRANS_DP_ENH_FRAMING;
1717 I915_WRITE(TRANS_DP_CTL(crtc->pipe), trans_dp);
1719 if (!HAS_PCH_SPLIT(dev) && !IS_VALLEYVIEW(dev) &&
1720 !IS_CHERRYVIEW(dev) && crtc->config->limited_color_range)
1721 intel_dp->DP |= DP_COLOR_RANGE_16_235;
1723 if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
1724 intel_dp->DP |= DP_SYNC_HS_HIGH;
1725 if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
1726 intel_dp->DP |= DP_SYNC_VS_HIGH;
1727 intel_dp->DP |= DP_LINK_TRAIN_OFF;
1729 if (drm_dp_enhanced_frame_cap(intel_dp->dpcd))
1730 intel_dp->DP |= DP_ENHANCED_FRAMING;
1732 if (IS_CHERRYVIEW(dev))
1733 intel_dp->DP |= DP_PIPE_SELECT_CHV(crtc->pipe);
1734 else if (crtc->pipe == PIPE_B)
1735 intel_dp->DP |= DP_PIPEB_SELECT;
1739 #define IDLE_ON_MASK (PP_ON | PP_SEQUENCE_MASK | 0 | PP_SEQUENCE_STATE_MASK)
1740 #define IDLE_ON_VALUE (PP_ON | PP_SEQUENCE_NONE | 0 | PP_SEQUENCE_STATE_ON_IDLE)
1742 #define IDLE_OFF_MASK (PP_ON | PP_SEQUENCE_MASK | 0 | 0)
1743 #define IDLE_OFF_VALUE (0 | PP_SEQUENCE_NONE | 0 | 0)
1745 #define IDLE_CYCLE_MASK (PP_ON | PP_SEQUENCE_MASK | PP_CYCLE_DELAY_ACTIVE | PP_SEQUENCE_STATE_MASK)
1746 #define IDLE_CYCLE_VALUE (0 | PP_SEQUENCE_NONE | 0 | PP_SEQUENCE_STATE_OFF_IDLE)
1748 static void intel_pps_verify_state(struct drm_i915_private *dev_priv,
1749 struct intel_dp *intel_dp);
1751 static void wait_panel_status(struct intel_dp *intel_dp,
1755 struct drm_device *dev = intel_dp_to_dev(intel_dp);
1756 struct drm_i915_private *dev_priv = to_i915(dev);
1757 i915_reg_t pp_stat_reg, pp_ctrl_reg;
1759 lockdep_assert_held(&dev_priv->pps_mutex);
1761 intel_pps_verify_state(dev_priv, intel_dp);
1763 pp_stat_reg = _pp_stat_reg(intel_dp);
1764 pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
1766 DRM_DEBUG_KMS("mask %08x value %08x status %08x control %08x\n",
1768 I915_READ(pp_stat_reg),
1769 I915_READ(pp_ctrl_reg));
1771 if (intel_wait_for_register(dev_priv,
1772 pp_stat_reg, mask, value,
1774 DRM_ERROR("Panel status timeout: status %08x control %08x\n",
1775 I915_READ(pp_stat_reg),
1776 I915_READ(pp_ctrl_reg));
1778 DRM_DEBUG_KMS("Wait complete\n");
1781 static void wait_panel_on(struct intel_dp *intel_dp)
1783 DRM_DEBUG_KMS("Wait for panel power on\n");
1784 wait_panel_status(intel_dp, IDLE_ON_MASK, IDLE_ON_VALUE);
1787 static void wait_panel_off(struct intel_dp *intel_dp)
1789 DRM_DEBUG_KMS("Wait for panel power off time\n");
1790 wait_panel_status(intel_dp, IDLE_OFF_MASK, IDLE_OFF_VALUE);
1793 static void wait_panel_power_cycle(struct intel_dp *intel_dp)
1795 ktime_t panel_power_on_time;
1796 s64 panel_power_off_duration;
1798 DRM_DEBUG_KMS("Wait for panel power cycle\n");
1800 /* take the difference of currrent time and panel power off time
1801 * and then make panel wait for t11_t12 if needed. */
1802 panel_power_on_time = ktime_get_boottime();
1803 panel_power_off_duration = ktime_ms_delta(panel_power_on_time, intel_dp->panel_power_off_time);
1805 /* When we disable the VDD override bit last we have to do the manual
1807 if (panel_power_off_duration < (s64)intel_dp->panel_power_cycle_delay)
1808 wait_remaining_ms_from_jiffies(jiffies,
1809 intel_dp->panel_power_cycle_delay - panel_power_off_duration);
1811 wait_panel_status(intel_dp, IDLE_CYCLE_MASK, IDLE_CYCLE_VALUE);
1814 static void wait_backlight_on(struct intel_dp *intel_dp)
1816 wait_remaining_ms_from_jiffies(intel_dp->last_power_on,
1817 intel_dp->backlight_on_delay);
1820 static void edp_wait_backlight_off(struct intel_dp *intel_dp)
1822 wait_remaining_ms_from_jiffies(intel_dp->last_backlight_off,
1823 intel_dp->backlight_off_delay);
1826 /* Read the current pp_control value, unlocking the register if it
1830 static u32 ironlake_get_pp_control(struct intel_dp *intel_dp)
1832 struct drm_device *dev = intel_dp_to_dev(intel_dp);
1833 struct drm_i915_private *dev_priv = to_i915(dev);
1836 lockdep_assert_held(&dev_priv->pps_mutex);
1838 control = I915_READ(_pp_ctrl_reg(intel_dp));
1839 if (!IS_BROXTON(dev)) {
1840 control &= ~PANEL_UNLOCK_MASK;
1841 control |= PANEL_UNLOCK_REGS;
1847 * Must be paired with edp_panel_vdd_off().
1848 * Must hold pps_mutex around the whole on/off sequence.
1849 * Can be nested with intel_edp_panel_vdd_{on,off}() calls.
1851 static bool edp_panel_vdd_on(struct intel_dp *intel_dp)
1853 struct drm_device *dev = intel_dp_to_dev(intel_dp);
1854 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
1855 struct intel_encoder *intel_encoder = &intel_dig_port->base;
1856 struct drm_i915_private *dev_priv = to_i915(dev);
1857 enum intel_display_power_domain power_domain;
1859 i915_reg_t pp_stat_reg, pp_ctrl_reg;
1860 bool need_to_disable = !intel_dp->want_panel_vdd;
1862 lockdep_assert_held(&dev_priv->pps_mutex);
1864 if (!is_edp(intel_dp))
1867 cancel_delayed_work(&intel_dp->panel_vdd_work);
1868 intel_dp->want_panel_vdd = true;
1870 if (edp_have_panel_vdd(intel_dp))
1871 return need_to_disable;
1873 power_domain = intel_display_port_aux_power_domain(intel_encoder);
1874 intel_display_power_get(dev_priv, power_domain);
1876 DRM_DEBUG_KMS("Turning eDP port %c VDD on\n",
1877 port_name(intel_dig_port->port));
1879 if (!edp_have_panel_power(intel_dp))
1880 wait_panel_power_cycle(intel_dp);
1882 pp = ironlake_get_pp_control(intel_dp);
1883 pp |= EDP_FORCE_VDD;
1885 pp_stat_reg = _pp_stat_reg(intel_dp);
1886 pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
1888 I915_WRITE(pp_ctrl_reg, pp);
1889 POSTING_READ(pp_ctrl_reg);
1890 DRM_DEBUG_KMS("PP_STATUS: 0x%08x PP_CONTROL: 0x%08x\n",
1891 I915_READ(pp_stat_reg), I915_READ(pp_ctrl_reg));
1893 * If the panel wasn't on, delay before accessing aux channel
1895 if (!edp_have_panel_power(intel_dp)) {
1896 DRM_DEBUG_KMS("eDP port %c panel power wasn't enabled\n",
1897 port_name(intel_dig_port->port));
1898 msleep(intel_dp->panel_power_up_delay);
1901 return need_to_disable;
1905 * Must be paired with intel_edp_panel_vdd_off() or
1906 * intel_edp_panel_off().
1907 * Nested calls to these functions are not allowed since
1908 * we drop the lock. Caller must use some higher level
1909 * locking to prevent nested calls from other threads.
1911 void intel_edp_panel_vdd_on(struct intel_dp *intel_dp)
1915 if (!is_edp(intel_dp))
1919 vdd = edp_panel_vdd_on(intel_dp);
1920 pps_unlock(intel_dp);
1922 I915_STATE_WARN(!vdd, "eDP port %c VDD already requested on\n",
1923 port_name(dp_to_dig_port(intel_dp)->port));
1926 static void edp_panel_vdd_off_sync(struct intel_dp *intel_dp)
1928 struct drm_device *dev = intel_dp_to_dev(intel_dp);
1929 struct drm_i915_private *dev_priv = to_i915(dev);
1930 struct intel_digital_port *intel_dig_port =
1931 dp_to_dig_port(intel_dp);
1932 struct intel_encoder *intel_encoder = &intel_dig_port->base;
1933 enum intel_display_power_domain power_domain;
1935 i915_reg_t pp_stat_reg, pp_ctrl_reg;
1937 lockdep_assert_held(&dev_priv->pps_mutex);
1939 WARN_ON(intel_dp->want_panel_vdd);
1941 if (!edp_have_panel_vdd(intel_dp))
1944 DRM_DEBUG_KMS("Turning eDP port %c VDD off\n",
1945 port_name(intel_dig_port->port));
1947 pp = ironlake_get_pp_control(intel_dp);
1948 pp &= ~EDP_FORCE_VDD;
1950 pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
1951 pp_stat_reg = _pp_stat_reg(intel_dp);
1953 I915_WRITE(pp_ctrl_reg, pp);
1954 POSTING_READ(pp_ctrl_reg);
1956 /* Make sure sequencer is idle before allowing subsequent activity */
1957 DRM_DEBUG_KMS("PP_STATUS: 0x%08x PP_CONTROL: 0x%08x\n",
1958 I915_READ(pp_stat_reg), I915_READ(pp_ctrl_reg));
1960 if ((pp & POWER_TARGET_ON) == 0)
1961 intel_dp->panel_power_off_time = ktime_get_boottime();
1963 power_domain = intel_display_port_aux_power_domain(intel_encoder);
1964 intel_display_power_put(dev_priv, power_domain);
1967 static void edp_panel_vdd_work(struct work_struct *__work)
1969 struct intel_dp *intel_dp = container_of(to_delayed_work(__work),
1970 struct intel_dp, panel_vdd_work);
1973 if (!intel_dp->want_panel_vdd)
1974 edp_panel_vdd_off_sync(intel_dp);
1975 pps_unlock(intel_dp);
1978 static void edp_panel_vdd_schedule_off(struct intel_dp *intel_dp)
1980 unsigned long delay;
1983 * Queue the timer to fire a long time from now (relative to the power
1984 * down delay) to keep the panel power up across a sequence of
1987 delay = msecs_to_jiffies(intel_dp->panel_power_cycle_delay * 5);
1988 schedule_delayed_work(&intel_dp->panel_vdd_work, delay);
1992 * Must be paired with edp_panel_vdd_on().
1993 * Must hold pps_mutex around the whole on/off sequence.
1994 * Can be nested with intel_edp_panel_vdd_{on,off}() calls.
1996 static void edp_panel_vdd_off(struct intel_dp *intel_dp, bool sync)
1998 struct drm_i915_private *dev_priv = to_i915(intel_dp_to_dev(intel_dp));
2000 lockdep_assert_held(&dev_priv->pps_mutex);
2002 if (!is_edp(intel_dp))
2005 I915_STATE_WARN(!intel_dp->want_panel_vdd, "eDP port %c VDD not forced on",
2006 port_name(dp_to_dig_port(intel_dp)->port));
2008 intel_dp->want_panel_vdd = false;
2011 edp_panel_vdd_off_sync(intel_dp);
2013 edp_panel_vdd_schedule_off(intel_dp);
2016 static void edp_panel_on(struct intel_dp *intel_dp)
2018 struct drm_device *dev = intel_dp_to_dev(intel_dp);
2019 struct drm_i915_private *dev_priv = to_i915(dev);
2021 i915_reg_t pp_ctrl_reg;
2023 lockdep_assert_held(&dev_priv->pps_mutex);
2025 if (!is_edp(intel_dp))
2028 DRM_DEBUG_KMS("Turn eDP port %c panel power on\n",
2029 port_name(dp_to_dig_port(intel_dp)->port));
2031 if (WARN(edp_have_panel_power(intel_dp),
2032 "eDP port %c panel power already on\n",
2033 port_name(dp_to_dig_port(intel_dp)->port)))
2036 wait_panel_power_cycle(intel_dp);
2038 pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
2039 pp = ironlake_get_pp_control(intel_dp);
2041 /* ILK workaround: disable reset around power sequence */
2042 pp &= ~PANEL_POWER_RESET;
2043 I915_WRITE(pp_ctrl_reg, pp);
2044 POSTING_READ(pp_ctrl_reg);
2047 pp |= POWER_TARGET_ON;
2049 pp |= PANEL_POWER_RESET;
2051 I915_WRITE(pp_ctrl_reg, pp);
2052 POSTING_READ(pp_ctrl_reg);
2054 wait_panel_on(intel_dp);
2055 intel_dp->last_power_on = jiffies;
2058 pp |= PANEL_POWER_RESET; /* restore panel reset bit */
2059 I915_WRITE(pp_ctrl_reg, pp);
2060 POSTING_READ(pp_ctrl_reg);
2064 void intel_edp_panel_on(struct intel_dp *intel_dp)
2066 if (!is_edp(intel_dp))
2070 edp_panel_on(intel_dp);
2071 pps_unlock(intel_dp);
2075 static void edp_panel_off(struct intel_dp *intel_dp)
2077 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
2078 struct intel_encoder *intel_encoder = &intel_dig_port->base;
2079 struct drm_device *dev = intel_dp_to_dev(intel_dp);
2080 struct drm_i915_private *dev_priv = to_i915(dev);
2081 enum intel_display_power_domain power_domain;
2083 i915_reg_t pp_ctrl_reg;
2085 lockdep_assert_held(&dev_priv->pps_mutex);
2087 if (!is_edp(intel_dp))
2090 DRM_DEBUG_KMS("Turn eDP port %c panel power off\n",
2091 port_name(dp_to_dig_port(intel_dp)->port));
2093 WARN(!intel_dp->want_panel_vdd, "Need eDP port %c VDD to turn off panel\n",
2094 port_name(dp_to_dig_port(intel_dp)->port));
2096 pp = ironlake_get_pp_control(intel_dp);
2097 /* We need to switch off panel power _and_ force vdd, for otherwise some
2098 * panels get very unhappy and cease to work. */
2099 pp &= ~(POWER_TARGET_ON | PANEL_POWER_RESET | EDP_FORCE_VDD |
2102 pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
2104 intel_dp->want_panel_vdd = false;
2106 I915_WRITE(pp_ctrl_reg, pp);
2107 POSTING_READ(pp_ctrl_reg);
2109 intel_dp->panel_power_off_time = ktime_get_boottime();
2110 wait_panel_off(intel_dp);
2112 /* We got a reference when we enabled the VDD. */
2113 power_domain = intel_display_port_aux_power_domain(intel_encoder);
2114 intel_display_power_put(dev_priv, power_domain);
2117 void intel_edp_panel_off(struct intel_dp *intel_dp)
2119 if (!is_edp(intel_dp))
2123 edp_panel_off(intel_dp);
2124 pps_unlock(intel_dp);
2127 /* Enable backlight in the panel power control. */
2128 static void _intel_edp_backlight_on(struct intel_dp *intel_dp)
2130 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
2131 struct drm_device *dev = intel_dig_port->base.base.dev;
2132 struct drm_i915_private *dev_priv = to_i915(dev);
2134 i915_reg_t pp_ctrl_reg;
2137 * If we enable the backlight right away following a panel power
2138 * on, we may see slight flicker as the panel syncs with the eDP
2139 * link. So delay a bit to make sure the image is solid before
2140 * allowing it to appear.
2142 wait_backlight_on(intel_dp);
2146 pp = ironlake_get_pp_control(intel_dp);
2147 pp |= EDP_BLC_ENABLE;
2149 pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
2151 I915_WRITE(pp_ctrl_reg, pp);
2152 POSTING_READ(pp_ctrl_reg);
2154 pps_unlock(intel_dp);
2157 /* Enable backlight PWM and backlight PP control. */
2158 void intel_edp_backlight_on(struct intel_dp *intel_dp)
2160 if (!is_edp(intel_dp))
2163 DRM_DEBUG_KMS("\n");
2165 intel_panel_enable_backlight(intel_dp->attached_connector);
2166 _intel_edp_backlight_on(intel_dp);
2169 /* Disable backlight in the panel power control. */
2170 static void _intel_edp_backlight_off(struct intel_dp *intel_dp)
2172 struct drm_device *dev = intel_dp_to_dev(intel_dp);
2173 struct drm_i915_private *dev_priv = to_i915(dev);
2175 i915_reg_t pp_ctrl_reg;
2177 if (!is_edp(intel_dp))
2182 pp = ironlake_get_pp_control(intel_dp);
2183 pp &= ~EDP_BLC_ENABLE;
2185 pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
2187 I915_WRITE(pp_ctrl_reg, pp);
2188 POSTING_READ(pp_ctrl_reg);
2190 pps_unlock(intel_dp);
2192 intel_dp->last_backlight_off = jiffies;
2193 edp_wait_backlight_off(intel_dp);
2196 /* Disable backlight PP control and backlight PWM. */
2197 void intel_edp_backlight_off(struct intel_dp *intel_dp)
2199 if (!is_edp(intel_dp))
2202 DRM_DEBUG_KMS("\n");
2204 _intel_edp_backlight_off(intel_dp);
2205 intel_panel_disable_backlight(intel_dp->attached_connector);
2209 * Hook for controlling the panel power control backlight through the bl_power
2210 * sysfs attribute. Take care to handle multiple calls.
2212 static void intel_edp_backlight_power(struct intel_connector *connector,
2215 struct intel_dp *intel_dp = intel_attached_dp(&connector->base);
2219 is_enabled = ironlake_get_pp_control(intel_dp) & EDP_BLC_ENABLE;
2220 pps_unlock(intel_dp);
2222 if (is_enabled == enable)
2225 DRM_DEBUG_KMS("panel power control backlight %s\n",
2226 enable ? "enable" : "disable");
2229 _intel_edp_backlight_on(intel_dp);
2231 _intel_edp_backlight_off(intel_dp);
2234 static void assert_dp_port(struct intel_dp *intel_dp, bool state)
2236 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
2237 struct drm_i915_private *dev_priv = to_i915(dig_port->base.base.dev);
2238 bool cur_state = I915_READ(intel_dp->output_reg) & DP_PORT_EN;
2240 I915_STATE_WARN(cur_state != state,
2241 "DP port %c state assertion failure (expected %s, current %s)\n",
2242 port_name(dig_port->port),
2243 onoff(state), onoff(cur_state));
2245 #define assert_dp_port_disabled(d) assert_dp_port((d), false)
2247 static void assert_edp_pll(struct drm_i915_private *dev_priv, bool state)
2249 bool cur_state = I915_READ(DP_A) & DP_PLL_ENABLE;
2251 I915_STATE_WARN(cur_state != state,
2252 "eDP PLL state assertion failure (expected %s, current %s)\n",
2253 onoff(state), onoff(cur_state));
2255 #define assert_edp_pll_enabled(d) assert_edp_pll((d), true)
2256 #define assert_edp_pll_disabled(d) assert_edp_pll((d), false)
2258 static void ironlake_edp_pll_on(struct intel_dp *intel_dp)
2260 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
2261 struct intel_crtc *crtc = to_intel_crtc(intel_dig_port->base.base.crtc);
2262 struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
2264 assert_pipe_disabled(dev_priv, crtc->pipe);
2265 assert_dp_port_disabled(intel_dp);
2266 assert_edp_pll_disabled(dev_priv);
2268 DRM_DEBUG_KMS("enabling eDP PLL for clock %d\n",
2269 crtc->config->port_clock);
2271 intel_dp->DP &= ~DP_PLL_FREQ_MASK;
2273 if (crtc->config->port_clock == 162000)
2274 intel_dp->DP |= DP_PLL_FREQ_162MHZ;
2276 intel_dp->DP |= DP_PLL_FREQ_270MHZ;
2278 I915_WRITE(DP_A, intel_dp->DP);
2283 * [DevILK] Work around required when enabling DP PLL
2284 * while a pipe is enabled going to FDI:
2285 * 1. Wait for the start of vertical blank on the enabled pipe going to FDI
2286 * 2. Program DP PLL enable
2288 if (IS_GEN5(dev_priv))
2289 intel_wait_for_vblank_if_active(&dev_priv->drm, !crtc->pipe);
2291 intel_dp->DP |= DP_PLL_ENABLE;
2293 I915_WRITE(DP_A, intel_dp->DP);
2298 static void ironlake_edp_pll_off(struct intel_dp *intel_dp)
2300 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
2301 struct intel_crtc *crtc = to_intel_crtc(intel_dig_port->base.base.crtc);
2302 struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
2304 assert_pipe_disabled(dev_priv, crtc->pipe);
2305 assert_dp_port_disabled(intel_dp);
2306 assert_edp_pll_enabled(dev_priv);
2308 DRM_DEBUG_KMS("disabling eDP PLL\n");
2310 intel_dp->DP &= ~DP_PLL_ENABLE;
2312 I915_WRITE(DP_A, intel_dp->DP);
2317 /* If the sink supports it, try to set the power state appropriately */
2318 void intel_dp_sink_dpms(struct intel_dp *intel_dp, int mode)
2322 /* Should have a valid DPCD by this point */
2323 if (intel_dp->dpcd[DP_DPCD_REV] < 0x11)
2326 if (mode != DRM_MODE_DPMS_ON) {
2327 ret = drm_dp_dpcd_writeb(&intel_dp->aux, DP_SET_POWER,
2331 * When turning on, we need to retry for 1ms to give the sink
2334 for (i = 0; i < 3; i++) {
2335 ret = drm_dp_dpcd_writeb(&intel_dp->aux, DP_SET_POWER,
2344 DRM_DEBUG_KMS("failed to %s sink power state\n",
2345 mode == DRM_MODE_DPMS_ON ? "enable" : "disable");
2348 static bool intel_dp_get_hw_state(struct intel_encoder *encoder,
2351 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
2352 enum port port = dp_to_dig_port(intel_dp)->port;
2353 struct drm_device *dev = encoder->base.dev;
2354 struct drm_i915_private *dev_priv = to_i915(dev);
2355 enum intel_display_power_domain power_domain;
2359 power_domain = intel_display_port_power_domain(encoder);
2360 if (!intel_display_power_get_if_enabled(dev_priv, power_domain))
2365 tmp = I915_READ(intel_dp->output_reg);
2367 if (!(tmp & DP_PORT_EN))
2370 if (IS_GEN7(dev) && port == PORT_A) {
2371 *pipe = PORT_TO_PIPE_CPT(tmp);
2372 } else if (HAS_PCH_CPT(dev) && port != PORT_A) {
2375 for_each_pipe(dev_priv, p) {
2376 u32 trans_dp = I915_READ(TRANS_DP_CTL(p));
2377 if (TRANS_DP_PIPE_TO_PORT(trans_dp) == port) {
2385 DRM_DEBUG_KMS("No pipe for dp port 0x%x found\n",
2386 i915_mmio_reg_offset(intel_dp->output_reg));
2387 } else if (IS_CHERRYVIEW(dev)) {
2388 *pipe = DP_PORT_TO_PIPE_CHV(tmp);
2390 *pipe = PORT_TO_PIPE(tmp);
2396 intel_display_power_put(dev_priv, power_domain);
2401 static void intel_dp_get_config(struct intel_encoder *encoder,
2402 struct intel_crtc_state *pipe_config)
2404 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
2406 struct drm_device *dev = encoder->base.dev;
2407 struct drm_i915_private *dev_priv = to_i915(dev);
2408 enum port port = dp_to_dig_port(intel_dp)->port;
2409 struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
2411 tmp = I915_READ(intel_dp->output_reg);
2413 pipe_config->has_audio = tmp & DP_AUDIO_OUTPUT_ENABLE && port != PORT_A;
2415 if (HAS_PCH_CPT(dev) && port != PORT_A) {
2416 u32 trans_dp = I915_READ(TRANS_DP_CTL(crtc->pipe));
2418 if (trans_dp & TRANS_DP_HSYNC_ACTIVE_HIGH)
2419 flags |= DRM_MODE_FLAG_PHSYNC;
2421 flags |= DRM_MODE_FLAG_NHSYNC;
2423 if (trans_dp & TRANS_DP_VSYNC_ACTIVE_HIGH)
2424 flags |= DRM_MODE_FLAG_PVSYNC;
2426 flags |= DRM_MODE_FLAG_NVSYNC;
2428 if (tmp & DP_SYNC_HS_HIGH)
2429 flags |= DRM_MODE_FLAG_PHSYNC;
2431 flags |= DRM_MODE_FLAG_NHSYNC;
2433 if (tmp & DP_SYNC_VS_HIGH)
2434 flags |= DRM_MODE_FLAG_PVSYNC;
2436 flags |= DRM_MODE_FLAG_NVSYNC;
2439 pipe_config->base.adjusted_mode.flags |= flags;
2441 if (!HAS_PCH_SPLIT(dev) && !IS_VALLEYVIEW(dev) &&
2442 !IS_CHERRYVIEW(dev) && tmp & DP_COLOR_RANGE_16_235)
2443 pipe_config->limited_color_range = true;
2445 pipe_config->lane_count =
2446 ((tmp & DP_PORT_WIDTH_MASK) >> DP_PORT_WIDTH_SHIFT) + 1;
2448 intel_dp_get_m_n(crtc, pipe_config);
2450 if (port == PORT_A) {
2451 if ((I915_READ(DP_A) & DP_PLL_FREQ_MASK) == DP_PLL_FREQ_162MHZ)
2452 pipe_config->port_clock = 162000;
2454 pipe_config->port_clock = 270000;
2457 pipe_config->base.adjusted_mode.crtc_clock =
2458 intel_dotclock_calculate(pipe_config->port_clock,
2459 &pipe_config->dp_m_n);
2461 if (is_edp(intel_dp) && dev_priv->vbt.edp.bpp &&
2462 pipe_config->pipe_bpp > dev_priv->vbt.edp.bpp) {
2464 * This is a big fat ugly hack.
2466 * Some machines in UEFI boot mode provide us a VBT that has 18
2467 * bpp and 1.62 GHz link bandwidth for eDP, which for reasons
2468 * unknown we fail to light up. Yet the same BIOS boots up with
2469 * 24 bpp and 2.7 GHz link. Use the same bpp as the BIOS uses as
2470 * max, not what it tells us to use.
2472 * Note: This will still be broken if the eDP panel is not lit
2473 * up by the BIOS, and thus we can't get the mode at module
2476 DRM_DEBUG_KMS("pipe has %d bpp for eDP panel, overriding BIOS-provided max %d bpp\n",
2477 pipe_config->pipe_bpp, dev_priv->vbt.edp.bpp);
2478 dev_priv->vbt.edp.bpp = pipe_config->pipe_bpp;
2482 static void intel_disable_dp(struct intel_encoder *encoder)
2484 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
2485 struct drm_device *dev = encoder->base.dev;
2486 struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
2488 if (crtc->config->has_audio)
2489 intel_audio_codec_disable(encoder);
2491 if (HAS_PSR(dev) && !HAS_DDI(dev))
2492 intel_psr_disable(intel_dp);
2494 /* Make sure the panel is off before trying to change the mode. But also
2495 * ensure that we have vdd while we switch off the panel. */
2496 intel_edp_panel_vdd_on(intel_dp);
2497 intel_edp_backlight_off(intel_dp);
2498 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
2499 intel_edp_panel_off(intel_dp);
2501 /* disable the port before the pipe on g4x */
2502 if (INTEL_INFO(dev)->gen < 5)
2503 intel_dp_link_down(intel_dp);
2506 static void ilk_post_disable_dp(struct intel_encoder *encoder)
2508 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
2509 enum port port = dp_to_dig_port(intel_dp)->port;
2511 intel_dp_link_down(intel_dp);
2513 /* Only ilk+ has port A */
2515 ironlake_edp_pll_off(intel_dp);
2518 static void vlv_post_disable_dp(struct intel_encoder *encoder)
2520 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
2522 intel_dp_link_down(intel_dp);
2525 static void chv_post_disable_dp(struct intel_encoder *encoder)
2527 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
2528 struct drm_device *dev = encoder->base.dev;
2529 struct drm_i915_private *dev_priv = to_i915(dev);
2531 intel_dp_link_down(intel_dp);
2533 mutex_lock(&dev_priv->sb_lock);
2535 /* Assert data lane reset */
2536 chv_data_lane_soft_reset(encoder, true);
2538 mutex_unlock(&dev_priv->sb_lock);
2542 _intel_dp_set_link_train(struct intel_dp *intel_dp,
2544 uint8_t dp_train_pat)
2546 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
2547 struct drm_device *dev = intel_dig_port->base.base.dev;
2548 struct drm_i915_private *dev_priv = to_i915(dev);
2549 enum port port = intel_dig_port->port;
2552 uint32_t temp = I915_READ(DP_TP_CTL(port));
2554 if (dp_train_pat & DP_LINK_SCRAMBLING_DISABLE)
2555 temp |= DP_TP_CTL_SCRAMBLE_DISABLE;
2557 temp &= ~DP_TP_CTL_SCRAMBLE_DISABLE;
2559 temp &= ~DP_TP_CTL_LINK_TRAIN_MASK;
2560 switch (dp_train_pat & DP_TRAINING_PATTERN_MASK) {
2561 case DP_TRAINING_PATTERN_DISABLE:
2562 temp |= DP_TP_CTL_LINK_TRAIN_NORMAL;
2565 case DP_TRAINING_PATTERN_1:
2566 temp |= DP_TP_CTL_LINK_TRAIN_PAT1;
2568 case DP_TRAINING_PATTERN_2:
2569 temp |= DP_TP_CTL_LINK_TRAIN_PAT2;
2571 case DP_TRAINING_PATTERN_3:
2572 temp |= DP_TP_CTL_LINK_TRAIN_PAT3;
2575 I915_WRITE(DP_TP_CTL(port), temp);
2577 } else if ((IS_GEN7(dev) && port == PORT_A) ||
2578 (HAS_PCH_CPT(dev) && port != PORT_A)) {
2579 *DP &= ~DP_LINK_TRAIN_MASK_CPT;
2581 switch (dp_train_pat & DP_TRAINING_PATTERN_MASK) {
2582 case DP_TRAINING_PATTERN_DISABLE:
2583 *DP |= DP_LINK_TRAIN_OFF_CPT;
2585 case DP_TRAINING_PATTERN_1:
2586 *DP |= DP_LINK_TRAIN_PAT_1_CPT;
2588 case DP_TRAINING_PATTERN_2:
2589 *DP |= DP_LINK_TRAIN_PAT_2_CPT;
2591 case DP_TRAINING_PATTERN_3:
2592 DRM_ERROR("DP training pattern 3 not supported\n");
2593 *DP |= DP_LINK_TRAIN_PAT_2_CPT;
2598 if (IS_CHERRYVIEW(dev))
2599 *DP &= ~DP_LINK_TRAIN_MASK_CHV;
2601 *DP &= ~DP_LINK_TRAIN_MASK;
2603 switch (dp_train_pat & DP_TRAINING_PATTERN_MASK) {
2604 case DP_TRAINING_PATTERN_DISABLE:
2605 *DP |= DP_LINK_TRAIN_OFF;
2607 case DP_TRAINING_PATTERN_1:
2608 *DP |= DP_LINK_TRAIN_PAT_1;
2610 case DP_TRAINING_PATTERN_2:
2611 *DP |= DP_LINK_TRAIN_PAT_2;
2613 case DP_TRAINING_PATTERN_3:
2614 if (IS_CHERRYVIEW(dev)) {
2615 *DP |= DP_LINK_TRAIN_PAT_3_CHV;
2617 DRM_ERROR("DP training pattern 3 not supported\n");
2618 *DP |= DP_LINK_TRAIN_PAT_2;
2625 static void intel_dp_enable_port(struct intel_dp *intel_dp)
2627 struct drm_device *dev = intel_dp_to_dev(intel_dp);
2628 struct drm_i915_private *dev_priv = to_i915(dev);
2629 struct intel_crtc *crtc =
2630 to_intel_crtc(dp_to_dig_port(intel_dp)->base.base.crtc);
2632 /* enable with pattern 1 (as per spec) */
2633 _intel_dp_set_link_train(intel_dp, &intel_dp->DP,
2634 DP_TRAINING_PATTERN_1);
2636 I915_WRITE(intel_dp->output_reg, intel_dp->DP);
2637 POSTING_READ(intel_dp->output_reg);
2640 * Magic for VLV/CHV. We _must_ first set up the register
2641 * without actually enabling the port, and then do another
2642 * write to enable the port. Otherwise link training will
2643 * fail when the power sequencer is freshly used for this port.
2645 intel_dp->DP |= DP_PORT_EN;
2646 if (crtc->config->has_audio)
2647 intel_dp->DP |= DP_AUDIO_OUTPUT_ENABLE;
2649 I915_WRITE(intel_dp->output_reg, intel_dp->DP);
2650 POSTING_READ(intel_dp->output_reg);
2653 static void intel_enable_dp(struct intel_encoder *encoder)
2655 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
2656 struct drm_device *dev = encoder->base.dev;
2657 struct drm_i915_private *dev_priv = to_i915(dev);
2658 struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
2659 uint32_t dp_reg = I915_READ(intel_dp->output_reg);
2660 enum pipe pipe = crtc->pipe;
2662 if (WARN_ON(dp_reg & DP_PORT_EN))
2667 if (IS_VALLEYVIEW(dev) || IS_CHERRYVIEW(dev))
2668 vlv_init_panel_power_sequencer(intel_dp);
2670 intel_dp_enable_port(intel_dp);
2672 edp_panel_vdd_on(intel_dp);
2673 edp_panel_on(intel_dp);
2674 edp_panel_vdd_off(intel_dp, true);
2676 pps_unlock(intel_dp);
2678 if (IS_VALLEYVIEW(dev) || IS_CHERRYVIEW(dev)) {
2679 unsigned int lane_mask = 0x0;
2681 if (IS_CHERRYVIEW(dev))
2682 lane_mask = intel_dp_unused_lane_mask(crtc->config->lane_count);
2684 vlv_wait_port_ready(dev_priv, dp_to_dig_port(intel_dp),
2688 WARN_ON(intel_dp->active_streams != 0);
2689 intel_dp->active_streams++;
2691 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
2692 intel_dp_start_link_train(intel_dp);
2693 intel_dp_stop_link_train(intel_dp);
2695 if (crtc->config->has_audio) {
2696 DRM_DEBUG_DRIVER("Enabling DP audio on pipe %c\n",
2698 intel_audio_codec_enable(encoder);
2702 static void g4x_enable_dp(struct intel_encoder *encoder)
2704 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
2706 intel_enable_dp(encoder);
2707 intel_edp_backlight_on(intel_dp);
2710 static void vlv_enable_dp(struct intel_encoder *encoder)
2712 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
2714 intel_edp_backlight_on(intel_dp);
2715 intel_psr_enable(intel_dp);
2718 static void g4x_pre_enable_dp(struct intel_encoder *encoder)
2720 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
2721 enum port port = dp_to_dig_port(intel_dp)->port;
2723 intel_dp_prepare(encoder);
2725 /* Only ilk+ has port A */
2727 ironlake_edp_pll_on(intel_dp);
2730 static void vlv_detach_power_sequencer(struct intel_dp *intel_dp)
2732 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
2733 struct drm_i915_private *dev_priv = to_i915(intel_dig_port->base.base.dev);
2734 enum pipe pipe = intel_dp->pps_pipe;
2735 i915_reg_t pp_on_reg = VLV_PIPE_PP_ON_DELAYS(pipe);
2737 edp_panel_vdd_off_sync(intel_dp);
2740 * VLV seems to get confused when multiple power seqeuencers
2741 * have the same port selected (even if only one has power/vdd
2742 * enabled). The failure manifests as vlv_wait_port_ready() failing
2743 * CHV on the other hand doesn't seem to mind having the same port
2744 * selected in multiple power seqeuencers, but let's clear the
2745 * port select always when logically disconnecting a power sequencer
2748 DRM_DEBUG_KMS("detaching pipe %c power sequencer from port %c\n",
2749 pipe_name(pipe), port_name(intel_dig_port->port));
2750 I915_WRITE(pp_on_reg, 0);
2751 POSTING_READ(pp_on_reg);
2753 intel_dp->pps_pipe = INVALID_PIPE;
2756 static void vlv_steal_power_sequencer(struct drm_device *dev,
2759 struct drm_i915_private *dev_priv = to_i915(dev);
2760 struct intel_encoder *encoder;
2762 lockdep_assert_held(&dev_priv->pps_mutex);
2764 if (WARN_ON(pipe != PIPE_A && pipe != PIPE_B))
2767 for_each_intel_encoder(dev, encoder) {
2768 struct intel_dp *intel_dp;
2771 if (encoder->type != INTEL_OUTPUT_EDP)
2774 intel_dp = enc_to_intel_dp(&encoder->base);
2775 port = dp_to_dig_port(intel_dp)->port;
2777 if (intel_dp->pps_pipe != pipe)
2780 DRM_DEBUG_KMS("stealing pipe %c power sequencer from port %c\n",
2781 pipe_name(pipe), port_name(port));
2783 WARN(encoder->base.crtc,
2784 "stealing pipe %c power sequencer from active eDP port %c\n",
2785 pipe_name(pipe), port_name(port));
2787 /* make sure vdd is off before we steal it */
2788 vlv_detach_power_sequencer(intel_dp);
2792 static void vlv_init_panel_power_sequencer(struct intel_dp *intel_dp)
2794 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
2795 struct intel_encoder *encoder = &intel_dig_port->base;
2796 struct drm_device *dev = encoder->base.dev;
2797 struct drm_i915_private *dev_priv = to_i915(dev);
2798 struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
2800 lockdep_assert_held(&dev_priv->pps_mutex);
2802 if (!is_edp(intel_dp))
2805 if (intel_dp->pps_pipe == crtc->pipe)
2809 * If another power sequencer was being used on this
2810 * port previously make sure to turn off vdd there while
2811 * we still have control of it.
2813 if (intel_dp->pps_pipe != INVALID_PIPE)
2814 vlv_detach_power_sequencer(intel_dp);
2817 * We may be stealing the power
2818 * sequencer from another port.
2820 vlv_steal_power_sequencer(dev, crtc->pipe);
2822 /* now it's all ours */
2823 intel_dp->pps_pipe = crtc->pipe;
2825 DRM_DEBUG_KMS("initializing pipe %c power sequencer for port %c\n",
2826 pipe_name(intel_dp->pps_pipe), port_name(intel_dig_port->port));
2828 /* init power sequencer on this pipe and port */
2829 intel_dp_init_panel_power_sequencer(dev, intel_dp);
2830 intel_dp_init_panel_power_sequencer_registers(dev, intel_dp);
2833 static void vlv_pre_enable_dp(struct intel_encoder *encoder)
2835 vlv_phy_pre_encoder_enable(encoder);
2837 intel_enable_dp(encoder);
2840 static void vlv_dp_pre_pll_enable(struct intel_encoder *encoder)
2842 intel_dp_prepare(encoder);
2844 vlv_phy_pre_pll_enable(encoder);
2847 static void chv_pre_enable_dp(struct intel_encoder *encoder)
2849 chv_phy_pre_encoder_enable(encoder);
2851 intel_enable_dp(encoder);
2853 /* Second common lane will stay alive on its own now */
2854 chv_phy_release_cl2_override(encoder);
2857 static void chv_dp_pre_pll_enable(struct intel_encoder *encoder)
2859 intel_dp_prepare(encoder);
2861 chv_phy_pre_pll_enable(encoder);
2864 static void chv_dp_post_pll_disable(struct intel_encoder *encoder)
2866 chv_phy_post_pll_disable(encoder);
2870 * Fetch AUX CH registers 0x202 - 0x207 which contain
2871 * link status information
2874 intel_dp_get_link_status(struct intel_dp *intel_dp, uint8_t link_status[DP_LINK_STATUS_SIZE])
2876 return drm_dp_dpcd_read(&intel_dp->aux, DP_LANE0_1_STATUS, link_status,
2877 DP_LINK_STATUS_SIZE) == DP_LINK_STATUS_SIZE;
2880 /* These are source-specific values. */
2882 intel_dp_voltage_max(struct intel_dp *intel_dp)
2884 struct drm_device *dev = intel_dp_to_dev(intel_dp);
2885 struct drm_i915_private *dev_priv = to_i915(dev);
2886 enum port port = dp_to_dig_port(intel_dp)->port;
2888 if (IS_BROXTON(dev))
2889 return DP_TRAIN_VOLTAGE_SWING_LEVEL_3;
2890 else if (INTEL_INFO(dev)->gen >= 9) {
2891 if (dev_priv->vbt.edp.low_vswing && port == PORT_A)
2892 return DP_TRAIN_VOLTAGE_SWING_LEVEL_3;
2893 return DP_TRAIN_VOLTAGE_SWING_LEVEL_2;
2894 } else if (IS_VALLEYVIEW(dev) || IS_CHERRYVIEW(dev))
2895 return DP_TRAIN_VOLTAGE_SWING_LEVEL_3;
2896 else if (IS_GEN7(dev) && port == PORT_A)
2897 return DP_TRAIN_VOLTAGE_SWING_LEVEL_2;
2898 else if (HAS_PCH_CPT(dev) && port != PORT_A)
2899 return DP_TRAIN_VOLTAGE_SWING_LEVEL_3;
2901 return DP_TRAIN_VOLTAGE_SWING_LEVEL_2;
2905 intel_dp_pre_emphasis_max(struct intel_dp *intel_dp, uint8_t voltage_swing)
2907 struct drm_device *dev = intel_dp_to_dev(intel_dp);
2908 enum port port = dp_to_dig_port(intel_dp)->port;
2910 if (INTEL_INFO(dev)->gen >= 9) {
2911 switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) {
2912 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
2913 return DP_TRAIN_PRE_EMPH_LEVEL_3;
2914 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
2915 return DP_TRAIN_PRE_EMPH_LEVEL_2;
2916 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2:
2917 return DP_TRAIN_PRE_EMPH_LEVEL_1;
2918 case DP_TRAIN_VOLTAGE_SWING_LEVEL_3:
2919 return DP_TRAIN_PRE_EMPH_LEVEL_0;
2921 return DP_TRAIN_PRE_EMPH_LEVEL_0;
2923 } else if (IS_HASWELL(dev) || IS_BROADWELL(dev)) {
2924 switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) {
2925 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
2926 return DP_TRAIN_PRE_EMPH_LEVEL_3;
2927 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
2928 return DP_TRAIN_PRE_EMPH_LEVEL_2;
2929 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2:
2930 return DP_TRAIN_PRE_EMPH_LEVEL_1;
2931 case DP_TRAIN_VOLTAGE_SWING_LEVEL_3:
2933 return DP_TRAIN_PRE_EMPH_LEVEL_0;
2935 } else if (IS_VALLEYVIEW(dev) || IS_CHERRYVIEW(dev)) {
2936 switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) {
2937 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
2938 return DP_TRAIN_PRE_EMPH_LEVEL_3;
2939 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
2940 return DP_TRAIN_PRE_EMPH_LEVEL_2;
2941 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2:
2942 return DP_TRAIN_PRE_EMPH_LEVEL_1;
2943 case DP_TRAIN_VOLTAGE_SWING_LEVEL_3:
2945 return DP_TRAIN_PRE_EMPH_LEVEL_0;
2947 } else if (IS_GEN7(dev) && port == PORT_A) {
2948 switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) {
2949 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
2950 return DP_TRAIN_PRE_EMPH_LEVEL_2;
2951 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
2952 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2:
2953 return DP_TRAIN_PRE_EMPH_LEVEL_1;
2955 return DP_TRAIN_PRE_EMPH_LEVEL_0;
2958 switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) {
2959 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
2960 return DP_TRAIN_PRE_EMPH_LEVEL_2;
2961 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
2962 return DP_TRAIN_PRE_EMPH_LEVEL_2;
2963 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2:
2964 return DP_TRAIN_PRE_EMPH_LEVEL_1;
2965 case DP_TRAIN_VOLTAGE_SWING_LEVEL_3:
2967 return DP_TRAIN_PRE_EMPH_LEVEL_0;
2972 static uint32_t vlv_signal_levels(struct intel_dp *intel_dp)
2974 struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;
2975 unsigned long demph_reg_value, preemph_reg_value,
2976 uniqtranscale_reg_value;
2977 uint8_t train_set = intel_dp->train_set[0];
2979 switch (train_set & DP_TRAIN_PRE_EMPHASIS_MASK) {
2980 case DP_TRAIN_PRE_EMPH_LEVEL_0:
2981 preemph_reg_value = 0x0004000;
2982 switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
2983 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
2984 demph_reg_value = 0x2B405555;
2985 uniqtranscale_reg_value = 0x552AB83A;
2987 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
2988 demph_reg_value = 0x2B404040;
2989 uniqtranscale_reg_value = 0x5548B83A;
2991 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2:
2992 demph_reg_value = 0x2B245555;
2993 uniqtranscale_reg_value = 0x5560B83A;
2995 case DP_TRAIN_VOLTAGE_SWING_LEVEL_3:
2996 demph_reg_value = 0x2B405555;
2997 uniqtranscale_reg_value = 0x5598DA3A;
3003 case DP_TRAIN_PRE_EMPH_LEVEL_1:
3004 preemph_reg_value = 0x0002000;
3005 switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
3006 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
3007 demph_reg_value = 0x2B404040;
3008 uniqtranscale_reg_value = 0x5552B83A;
3010 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
3011 demph_reg_value = 0x2B404848;
3012 uniqtranscale_reg_value = 0x5580B83A;
3014 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2:
3015 demph_reg_value = 0x2B404040;
3016 uniqtranscale_reg_value = 0x55ADDA3A;
3022 case DP_TRAIN_PRE_EMPH_LEVEL_2:
3023 preemph_reg_value = 0x0000000;
3024 switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
3025 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
3026 demph_reg_value = 0x2B305555;
3027 uniqtranscale_reg_value = 0x5570B83A;
3029 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
3030 demph_reg_value = 0x2B2B4040;
3031 uniqtranscale_reg_value = 0x55ADDA3A;
3037 case DP_TRAIN_PRE_EMPH_LEVEL_3:
3038 preemph_reg_value = 0x0006000;
3039 switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
3040 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
3041 demph_reg_value = 0x1B405555;
3042 uniqtranscale_reg_value = 0x55ADDA3A;
3052 vlv_set_phy_signal_level(encoder, demph_reg_value, preemph_reg_value,
3053 uniqtranscale_reg_value, 0);
3058 static uint32_t chv_signal_levels(struct intel_dp *intel_dp)
3060 struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;
3061 u32 deemph_reg_value, margin_reg_value;
3062 bool uniq_trans_scale = false;
3063 uint8_t train_set = intel_dp->train_set[0];
3065 switch (train_set & DP_TRAIN_PRE_EMPHASIS_MASK) {
3066 case DP_TRAIN_PRE_EMPH_LEVEL_0:
3067 switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
3068 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
3069 deemph_reg_value = 128;
3070 margin_reg_value = 52;
3072 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
3073 deemph_reg_value = 128;
3074 margin_reg_value = 77;
3076 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2:
3077 deemph_reg_value = 128;
3078 margin_reg_value = 102;
3080 case DP_TRAIN_VOLTAGE_SWING_LEVEL_3:
3081 deemph_reg_value = 128;
3082 margin_reg_value = 154;
3083 uniq_trans_scale = true;
3089 case DP_TRAIN_PRE_EMPH_LEVEL_1:
3090 switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
3091 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
3092 deemph_reg_value = 85;
3093 margin_reg_value = 78;
3095 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
3096 deemph_reg_value = 85;
3097 margin_reg_value = 116;
3099 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2:
3100 deemph_reg_value = 85;
3101 margin_reg_value = 154;
3107 case DP_TRAIN_PRE_EMPH_LEVEL_2:
3108 switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
3109 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
3110 deemph_reg_value = 64;
3111 margin_reg_value = 104;
3113 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
3114 deemph_reg_value = 64;
3115 margin_reg_value = 154;
3121 case DP_TRAIN_PRE_EMPH_LEVEL_3:
3122 switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
3123 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
3124 deemph_reg_value = 43;
3125 margin_reg_value = 154;
3135 chv_set_phy_signal_level(encoder, deemph_reg_value,
3136 margin_reg_value, uniq_trans_scale);
3142 gen4_signal_levels(uint8_t train_set)
3144 uint32_t signal_levels = 0;
3146 switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
3147 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
3149 signal_levels |= DP_VOLTAGE_0_4;
3151 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
3152 signal_levels |= DP_VOLTAGE_0_6;
3154 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2:
3155 signal_levels |= DP_VOLTAGE_0_8;
3157 case DP_TRAIN_VOLTAGE_SWING_LEVEL_3:
3158 signal_levels |= DP_VOLTAGE_1_2;
3161 switch (train_set & DP_TRAIN_PRE_EMPHASIS_MASK) {
3162 case DP_TRAIN_PRE_EMPH_LEVEL_0:
3164 signal_levels |= DP_PRE_EMPHASIS_0;
3166 case DP_TRAIN_PRE_EMPH_LEVEL_1:
3167 signal_levels |= DP_PRE_EMPHASIS_3_5;
3169 case DP_TRAIN_PRE_EMPH_LEVEL_2:
3170 signal_levels |= DP_PRE_EMPHASIS_6;
3172 case DP_TRAIN_PRE_EMPH_LEVEL_3:
3173 signal_levels |= DP_PRE_EMPHASIS_9_5;
3176 return signal_levels;
3179 /* Gen6's DP voltage swing and pre-emphasis control */
3181 gen6_edp_signal_levels(uint8_t train_set)
3183 int signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK |
3184 DP_TRAIN_PRE_EMPHASIS_MASK);
3185 switch (signal_levels) {
3186 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_0:
3187 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_0:
3188 return EDP_LINK_TRAIN_400_600MV_0DB_SNB_B;
3189 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_1:
3190 return EDP_LINK_TRAIN_400MV_3_5DB_SNB_B;
3191 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_2:
3192 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_2:
3193 return EDP_LINK_TRAIN_400_600MV_6DB_SNB_B;
3194 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_1:
3195 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2 | DP_TRAIN_PRE_EMPH_LEVEL_1:
3196 return EDP_LINK_TRAIN_600_800MV_3_5DB_SNB_B;
3197 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2 | DP_TRAIN_PRE_EMPH_LEVEL_0:
3198 case DP_TRAIN_VOLTAGE_SWING_LEVEL_3 | DP_TRAIN_PRE_EMPH_LEVEL_0:
3199 return EDP_LINK_TRAIN_800_1200MV_0DB_SNB_B;
3201 DRM_DEBUG_KMS("Unsupported voltage swing/pre-emphasis level:"
3202 "0x%x\n", signal_levels);
3203 return EDP_LINK_TRAIN_400_600MV_0DB_SNB_B;
3207 /* Gen7's DP voltage swing and pre-emphasis control */
3209 gen7_edp_signal_levels(uint8_t train_set)
3211 int signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK |
3212 DP_TRAIN_PRE_EMPHASIS_MASK);
3213 switch (signal_levels) {
3214 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_0:
3215 return EDP_LINK_TRAIN_400MV_0DB_IVB;
3216 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_1:
3217 return EDP_LINK_TRAIN_400MV_3_5DB_IVB;
3218 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_2:
3219 return EDP_LINK_TRAIN_400MV_6DB_IVB;
3221 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_0:
3222 return EDP_LINK_TRAIN_600MV_0DB_IVB;
3223 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_1:
3224 return EDP_LINK_TRAIN_600MV_3_5DB_IVB;
3226 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2 | DP_TRAIN_PRE_EMPH_LEVEL_0:
3227 return EDP_LINK_TRAIN_800MV_0DB_IVB;
3228 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2 | DP_TRAIN_PRE_EMPH_LEVEL_1:
3229 return EDP_LINK_TRAIN_800MV_3_5DB_IVB;
3232 DRM_DEBUG_KMS("Unsupported voltage swing/pre-emphasis level:"
3233 "0x%x\n", signal_levels);
3234 return EDP_LINK_TRAIN_500MV_0DB_IVB;
3239 intel_dp_set_signal_levels(struct intel_dp *intel_dp)
3241 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
3242 enum port port = intel_dig_port->port;
3243 struct drm_device *dev = intel_dig_port->base.base.dev;
3244 struct drm_i915_private *dev_priv = to_i915(dev);
3245 uint32_t signal_levels, mask = 0;
3246 uint8_t train_set = intel_dp->train_set[0];
3249 signal_levels = ddi_signal_levels(intel_dp);
3251 if (IS_BROXTON(dev))
3254 mask = DDI_BUF_EMP_MASK;
3255 } else if (IS_CHERRYVIEW(dev)) {
3256 signal_levels = chv_signal_levels(intel_dp);
3257 } else if (IS_VALLEYVIEW(dev)) {
3258 signal_levels = vlv_signal_levels(intel_dp);
3259 } else if (IS_GEN7(dev) && port == PORT_A) {
3260 signal_levels = gen7_edp_signal_levels(train_set);
3261 mask = EDP_LINK_TRAIN_VOL_EMP_MASK_IVB;
3262 } else if (IS_GEN6(dev) && port == PORT_A) {
3263 signal_levels = gen6_edp_signal_levels(train_set);
3264 mask = EDP_LINK_TRAIN_VOL_EMP_MASK_SNB;
3266 signal_levels = gen4_signal_levels(train_set);
3267 mask = DP_VOLTAGE_MASK | DP_PRE_EMPHASIS_MASK;
3271 DRM_DEBUG_KMS("Using signal levels %08x\n", signal_levels);
3273 DRM_DEBUG_KMS("Using vswing level %d\n",
3274 train_set & DP_TRAIN_VOLTAGE_SWING_MASK);
3275 DRM_DEBUG_KMS("Using pre-emphasis level %d\n",
3276 (train_set & DP_TRAIN_PRE_EMPHASIS_MASK) >>
3277 DP_TRAIN_PRE_EMPHASIS_SHIFT);
3279 intel_dp->DP = (intel_dp->DP & ~mask) | signal_levels;
3281 I915_WRITE(intel_dp->output_reg, intel_dp->DP);
3282 POSTING_READ(intel_dp->output_reg);
3286 intel_dp_program_link_training_pattern(struct intel_dp *intel_dp,
3287 uint8_t dp_train_pat)
3289 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
3290 struct drm_i915_private *dev_priv =
3291 to_i915(intel_dig_port->base.base.dev);
3293 _intel_dp_set_link_train(intel_dp, &intel_dp->DP, dp_train_pat);
3295 I915_WRITE(intel_dp->output_reg, intel_dp->DP);
3296 POSTING_READ(intel_dp->output_reg);
3299 void intel_dp_set_idle_link_train(struct intel_dp *intel_dp)
3301 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
3302 struct drm_device *dev = intel_dig_port->base.base.dev;
3303 struct drm_i915_private *dev_priv = to_i915(dev);
3304 enum port port = intel_dig_port->port;
3310 val = I915_READ(DP_TP_CTL(port));
3311 val &= ~DP_TP_CTL_LINK_TRAIN_MASK;
3312 val |= DP_TP_CTL_LINK_TRAIN_IDLE;
3313 I915_WRITE(DP_TP_CTL(port), val);
3316 * On PORT_A we can have only eDP in SST mode. There the only reason
3317 * we need to set idle transmission mode is to work around a HW issue
3318 * where we enable the pipe while not in idle link-training mode.
3319 * In this case there is requirement to wait for a minimum number of
3320 * idle patterns to be sent.
3325 if (intel_wait_for_register(dev_priv,DP_TP_STATUS(port),
3326 DP_TP_STATUS_IDLE_DONE,
3327 DP_TP_STATUS_IDLE_DONE,
3329 DRM_ERROR("Timed out waiting for DP idle patterns\n");
3333 intel_dp_link_down(struct intel_dp *intel_dp)
3335 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
3336 struct intel_crtc *crtc = to_intel_crtc(intel_dig_port->base.base.crtc);
3337 enum port port = intel_dig_port->port;
3338 struct drm_device *dev = intel_dig_port->base.base.dev;
3339 struct drm_i915_private *dev_priv = to_i915(dev);
3340 uint32_t DP = intel_dp->DP;
3342 if (WARN_ON(HAS_DDI(dev)))
3345 if (WARN_ON((I915_READ(intel_dp->output_reg) & DP_PORT_EN) == 0))
3348 DRM_DEBUG_KMS("\n");
3350 intel_dp->active_streams--;
3351 WARN_ON(intel_dp->active_streams != 0);
3353 if ((IS_GEN7(dev) && port == PORT_A) ||
3354 (HAS_PCH_CPT(dev) && port != PORT_A)) {
3355 DP &= ~DP_LINK_TRAIN_MASK_CPT;
3356 DP |= DP_LINK_TRAIN_PAT_IDLE_CPT;
3358 if (IS_CHERRYVIEW(dev))
3359 DP &= ~DP_LINK_TRAIN_MASK_CHV;
3361 DP &= ~DP_LINK_TRAIN_MASK;
3362 DP |= DP_LINK_TRAIN_PAT_IDLE;
3364 I915_WRITE(intel_dp->output_reg, DP);
3365 POSTING_READ(intel_dp->output_reg);
3367 DP &= ~(DP_PORT_EN | DP_AUDIO_OUTPUT_ENABLE);
3368 I915_WRITE(intel_dp->output_reg, DP);
3369 POSTING_READ(intel_dp->output_reg);
3372 * HW workaround for IBX, we need to move the port
3373 * to transcoder A after disabling it to allow the
3374 * matching HDMI port to be enabled on transcoder A.
3376 if (HAS_PCH_IBX(dev) && crtc->pipe == PIPE_B && port != PORT_A) {
3378 * We get CPU/PCH FIFO underruns on the other pipe when
3379 * doing the workaround. Sweep them under the rug.
3381 intel_set_cpu_fifo_underrun_reporting(dev_priv, PIPE_A, false);
3382 intel_set_pch_fifo_underrun_reporting(dev_priv, PIPE_A, false);
3384 /* always enable with pattern 1 (as per spec) */
3385 DP &= ~(DP_PIPEB_SELECT | DP_LINK_TRAIN_MASK);
3386 DP |= DP_PORT_EN | DP_LINK_TRAIN_PAT_1;
3387 I915_WRITE(intel_dp->output_reg, DP);
3388 POSTING_READ(intel_dp->output_reg);
3391 I915_WRITE(intel_dp->output_reg, DP);
3392 POSTING_READ(intel_dp->output_reg);
3394 intel_wait_for_vblank_if_active(&dev_priv->drm, PIPE_A);
3395 intel_set_cpu_fifo_underrun_reporting(dev_priv, PIPE_A, true);
3396 intel_set_pch_fifo_underrun_reporting(dev_priv, PIPE_A, true);
3399 msleep(intel_dp->panel_power_down_delay);
3405 intel_dp_read_dpcd(struct intel_dp *intel_dp)
3407 if (drm_dp_dpcd_read(&intel_dp->aux, 0x000, intel_dp->dpcd,
3408 sizeof(intel_dp->dpcd)) < 0)
3409 return false; /* aux transfer failed */
3411 DRM_DEBUG_KMS("DPCD: %*ph\n", (int) sizeof(intel_dp->dpcd), intel_dp->dpcd);
3413 return intel_dp->dpcd[DP_DPCD_REV] != 0;
3417 intel_edp_init_dpcd(struct intel_dp *intel_dp)
3419 struct drm_i915_private *dev_priv =
3420 to_i915(dp_to_dig_port(intel_dp)->base.base.dev);
3422 /* this function is meant to be called only once */
3423 WARN_ON(intel_dp->dpcd[DP_DPCD_REV] != 0);
3425 if (!intel_dp_read_dpcd(intel_dp))
3428 if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11)
3429 dev_priv->no_aux_handshake = intel_dp->dpcd[DP_MAX_DOWNSPREAD] &
3430 DP_NO_AUX_HANDSHAKE_LINK_TRAINING;
3432 /* Check if the panel supports PSR */
3433 drm_dp_dpcd_read(&intel_dp->aux, DP_PSR_SUPPORT,
3435 sizeof(intel_dp->psr_dpcd));
3436 if (intel_dp->psr_dpcd[0] & DP_PSR_IS_SUPPORTED) {
3437 dev_priv->psr.sink_support = true;
3438 DRM_DEBUG_KMS("Detected EDP PSR Panel.\n");
3441 if (INTEL_GEN(dev_priv) >= 9 &&
3442 (intel_dp->psr_dpcd[0] & DP_PSR2_IS_SUPPORTED)) {
3443 uint8_t frame_sync_cap;
3445 dev_priv->psr.sink_support = true;
3446 drm_dp_dpcd_read(&intel_dp->aux,
3447 DP_SINK_DEVICE_AUX_FRAME_SYNC_CAP,
3448 &frame_sync_cap, 1);
3449 dev_priv->psr.aux_frame_sync = frame_sync_cap ? true : false;
3450 /* PSR2 needs frame sync as well */
3451 dev_priv->psr.psr2_support = dev_priv->psr.aux_frame_sync;
3452 DRM_DEBUG_KMS("PSR2 %s on sink",
3453 dev_priv->psr.psr2_support ? "supported" : "not supported");
3456 /* Read the eDP Display control capabilities registers */
3457 if ((intel_dp->dpcd[DP_EDP_CONFIGURATION_CAP] & DP_DPCD_DISPLAY_CONTROL_CAPABLE) &&
3458 drm_dp_dpcd_read(&intel_dp->aux, DP_EDP_DPCD_REV,
3459 intel_dp->edp_dpcd, sizeof(intel_dp->edp_dpcd) ==
3460 sizeof(intel_dp->edp_dpcd)))
3461 DRM_DEBUG_KMS("EDP DPCD : %*ph\n", (int) sizeof(intel_dp->edp_dpcd),
3462 intel_dp->edp_dpcd);
3464 /* Intermediate frequency support */
3465 if (intel_dp->edp_dpcd[0] >= 0x03) { /* eDp v1.4 or higher */
3466 __le16 sink_rates[DP_MAX_SUPPORTED_RATES];
3469 drm_dp_dpcd_read(&intel_dp->aux, DP_SUPPORTED_LINK_RATES,
3470 sink_rates, sizeof(sink_rates));
3472 for (i = 0; i < ARRAY_SIZE(sink_rates); i++) {
3473 int val = le16_to_cpu(sink_rates[i]);
3478 /* Value read is in kHz while drm clock is saved in deca-kHz */
3479 intel_dp->sink_rates[i] = (val * 200) / 10;
3481 intel_dp->num_sink_rates = i;
3489 intel_dp_get_dpcd(struct intel_dp *intel_dp)
3491 if (!intel_dp_read_dpcd(intel_dp))
3494 if (drm_dp_dpcd_read(&intel_dp->aux, DP_SINK_COUNT,
3495 &intel_dp->sink_count, 1) < 0)
3499 * Sink count can change between short pulse hpd hence
3500 * a member variable in intel_dp will track any changes
3501 * between short pulse interrupts.
3503 intel_dp->sink_count = DP_GET_SINK_COUNT(intel_dp->sink_count);
3506 * SINK_COUNT == 0 and DOWNSTREAM_PORT_PRESENT == 1 implies that
3507 * a dongle is present but no display. Unless we require to know
3508 * if a dongle is present or not, we don't need to update
3509 * downstream port information. So, an early return here saves
3510 * time from performing other operations which are not required.
3512 if (!is_edp(intel_dp) && !intel_dp->sink_count)
3515 if (!(intel_dp->dpcd[DP_DOWNSTREAMPORT_PRESENT] &
3516 DP_DWN_STRM_PORT_PRESENT))
3517 return true; /* native DP sink */
3519 if (intel_dp->dpcd[DP_DPCD_REV] == 0x10)
3520 return true; /* no per-port downstream info */
3522 if (drm_dp_dpcd_read(&intel_dp->aux, DP_DOWNSTREAM_PORT_0,
3523 intel_dp->downstream_ports,
3524 DP_MAX_DOWNSTREAM_PORTS) < 0)
3525 return false; /* downstream port status fetch failed */
3531 intel_dp_probe_oui(struct intel_dp *intel_dp)
3535 if (!(intel_dp->dpcd[DP_DOWN_STREAM_PORT_COUNT] & DP_OUI_SUPPORT))
3538 if (drm_dp_dpcd_read(&intel_dp->aux, DP_SINK_OUI, buf, 3) == 3)
3539 DRM_DEBUG_KMS("Sink OUI: %02hx%02hx%02hx\n",
3540 buf[0], buf[1], buf[2]);
3542 if (drm_dp_dpcd_read(&intel_dp->aux, DP_BRANCH_OUI, buf, 3) == 3)
3543 DRM_DEBUG_KMS("Branch OUI: %02hx%02hx%02hx\n",
3544 buf[0], buf[1], buf[2]);
3548 intel_dp_can_mst(struct intel_dp *intel_dp)
3552 if (!i915.enable_dp_mst)
3555 if (!intel_dp->can_mst)
3558 if (intel_dp->dpcd[DP_DPCD_REV] < 0x12)
3561 if (drm_dp_dpcd_read(&intel_dp->aux, DP_MSTM_CAP, buf, 1) != 1)
3564 return buf[0] & DP_MST_CAP;
3568 intel_dp_configure_mst(struct intel_dp *intel_dp)
3570 if (!i915.enable_dp_mst)
3573 if (!intel_dp->can_mst)
3576 intel_dp->is_mst = intel_dp_can_mst(intel_dp);
3578 if (intel_dp->is_mst)
3579 DRM_DEBUG_KMS("Sink is MST capable\n");
3581 DRM_DEBUG_KMS("Sink is not MST capable\n");
3583 drm_dp_mst_topology_mgr_set_mst(&intel_dp->mst_mgr,
3587 static int intel_dp_sink_crc_stop(struct intel_dp *intel_dp)
3589 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
3590 struct drm_device *dev = dig_port->base.base.dev;
3591 struct intel_crtc *intel_crtc = to_intel_crtc(dig_port->base.base.crtc);
3597 if (drm_dp_dpcd_readb(&intel_dp->aux, DP_TEST_SINK, &buf) < 0) {
3598 DRM_DEBUG_KMS("Sink CRC couldn't be stopped properly\n");
3603 if (drm_dp_dpcd_writeb(&intel_dp->aux, DP_TEST_SINK,
3604 buf & ~DP_TEST_SINK_START) < 0) {
3605 DRM_DEBUG_KMS("Sink CRC couldn't be stopped properly\n");
3611 intel_wait_for_vblank(dev, intel_crtc->pipe);
3613 if (drm_dp_dpcd_readb(&intel_dp->aux,
3614 DP_TEST_SINK_MISC, &buf) < 0) {
3618 count = buf & DP_TEST_COUNT_MASK;
3619 } while (--attempts && count);
3621 if (attempts == 0) {
3622 DRM_DEBUG_KMS("TIMEOUT: Sink CRC counter is not zeroed after calculation is stopped\n");
3627 hsw_enable_ips(intel_crtc);
3631 static int intel_dp_sink_crc_start(struct intel_dp *intel_dp)
3633 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
3634 struct drm_device *dev = dig_port->base.base.dev;
3635 struct intel_crtc *intel_crtc = to_intel_crtc(dig_port->base.base.crtc);
3639 if (drm_dp_dpcd_readb(&intel_dp->aux, DP_TEST_SINK_MISC, &buf) < 0)
3642 if (!(buf & DP_TEST_CRC_SUPPORTED))
3645 if (drm_dp_dpcd_readb(&intel_dp->aux, DP_TEST_SINK, &buf) < 0)
3648 if (buf & DP_TEST_SINK_START) {
3649 ret = intel_dp_sink_crc_stop(intel_dp);
3654 hsw_disable_ips(intel_crtc);
3656 if (drm_dp_dpcd_writeb(&intel_dp->aux, DP_TEST_SINK,
3657 buf | DP_TEST_SINK_START) < 0) {
3658 hsw_enable_ips(intel_crtc);
3662 intel_wait_for_vblank(dev, intel_crtc->pipe);
3666 int intel_dp_sink_crc(struct intel_dp *intel_dp, u8 *crc)
3668 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
3669 struct drm_device *dev = dig_port->base.base.dev;
3670 struct intel_crtc *intel_crtc = to_intel_crtc(dig_port->base.base.crtc);
3675 ret = intel_dp_sink_crc_start(intel_dp);
3680 intel_wait_for_vblank(dev, intel_crtc->pipe);
3682 if (drm_dp_dpcd_readb(&intel_dp->aux,
3683 DP_TEST_SINK_MISC, &buf) < 0) {
3687 count = buf & DP_TEST_COUNT_MASK;
3689 } while (--attempts && count == 0);
3691 if (attempts == 0) {
3692 DRM_ERROR("Panel is unable to calculate any CRC after 6 vblanks\n");
3697 if (drm_dp_dpcd_read(&intel_dp->aux, DP_TEST_CRC_R_CR, crc, 6) < 0) {
3703 intel_dp_sink_crc_stop(intel_dp);
3708 intel_dp_get_sink_irq(struct intel_dp *intel_dp, u8 *sink_irq_vector)
3710 return drm_dp_dpcd_read(&intel_dp->aux,
3711 DP_DEVICE_SERVICE_IRQ_VECTOR,
3712 sink_irq_vector, 1) == 1;
3716 intel_dp_get_sink_irq_esi(struct intel_dp *intel_dp, u8 *sink_irq_vector)
3720 ret = drm_dp_dpcd_read(&intel_dp->aux,
3722 sink_irq_vector, 14);
3729 static uint8_t intel_dp_autotest_link_training(struct intel_dp *intel_dp)
3731 uint8_t test_result = DP_TEST_ACK;
3735 static uint8_t intel_dp_autotest_video_pattern(struct intel_dp *intel_dp)
3737 uint8_t test_result = DP_TEST_NAK;
3741 static uint8_t intel_dp_autotest_edid(struct intel_dp *intel_dp)
3743 uint8_t test_result = DP_TEST_NAK;
3744 struct intel_connector *intel_connector = intel_dp->attached_connector;
3745 struct drm_connector *connector = &intel_connector->base;
3747 if (intel_connector->detect_edid == NULL ||
3748 connector->edid_corrupt ||
3749 intel_dp->aux.i2c_defer_count > 6) {
3750 /* Check EDID read for NACKs, DEFERs and corruption
3751 * (DP CTS 1.2 Core r1.1)
3752 * 4.2.2.4 : Failed EDID read, I2C_NAK
3753 * 4.2.2.5 : Failed EDID read, I2C_DEFER
3754 * 4.2.2.6 : EDID corruption detected
3755 * Use failsafe mode for all cases
3757 if (intel_dp->aux.i2c_nack_count > 0 ||
3758 intel_dp->aux.i2c_defer_count > 0)
3759 DRM_DEBUG_KMS("EDID read had %d NACKs, %d DEFERs\n",
3760 intel_dp->aux.i2c_nack_count,
3761 intel_dp->aux.i2c_defer_count);
3762 intel_dp->compliance_test_data = INTEL_DP_RESOLUTION_FAILSAFE;
3764 struct edid *block = intel_connector->detect_edid;
3766 /* We have to write the checksum
3767 * of the last block read
3769 block += intel_connector->detect_edid->extensions;
3771 if (!drm_dp_dpcd_write(&intel_dp->aux,
3772 DP_TEST_EDID_CHECKSUM,
3775 DRM_DEBUG_KMS("Failed to write EDID checksum\n");
3777 test_result = DP_TEST_ACK | DP_TEST_EDID_CHECKSUM_WRITE;
3778 intel_dp->compliance_test_data = INTEL_DP_RESOLUTION_STANDARD;
3781 /* Set test active flag here so userspace doesn't interrupt things */
3782 intel_dp->compliance_test_active = 1;
3787 static uint8_t intel_dp_autotest_phy_pattern(struct intel_dp *intel_dp)
3789 uint8_t test_result = DP_TEST_NAK;
3793 static void intel_dp_handle_test_request(struct intel_dp *intel_dp)
3795 uint8_t response = DP_TEST_NAK;
3799 status = drm_dp_dpcd_read(&intel_dp->aux, DP_TEST_REQUEST, &rxdata, 1);
3801 DRM_DEBUG_KMS("Could not read test request from sink\n");
3806 case DP_TEST_LINK_TRAINING:
3807 DRM_DEBUG_KMS("LINK_TRAINING test requested\n");
3808 intel_dp->compliance_test_type = DP_TEST_LINK_TRAINING;
3809 response = intel_dp_autotest_link_training(intel_dp);
3811 case DP_TEST_LINK_VIDEO_PATTERN:
3812 DRM_DEBUG_KMS("TEST_PATTERN test requested\n");
3813 intel_dp->compliance_test_type = DP_TEST_LINK_VIDEO_PATTERN;
3814 response = intel_dp_autotest_video_pattern(intel_dp);
3816 case DP_TEST_LINK_EDID_READ:
3817 DRM_DEBUG_KMS("EDID test requested\n");
3818 intel_dp->compliance_test_type = DP_TEST_LINK_EDID_READ;
3819 response = intel_dp_autotest_edid(intel_dp);
3821 case DP_TEST_LINK_PHY_TEST_PATTERN:
3822 DRM_DEBUG_KMS("PHY_PATTERN test requested\n");
3823 intel_dp->compliance_test_type = DP_TEST_LINK_PHY_TEST_PATTERN;
3824 response = intel_dp_autotest_phy_pattern(intel_dp);
3827 DRM_DEBUG_KMS("Invalid test request '%02x'\n", rxdata);
3832 status = drm_dp_dpcd_write(&intel_dp->aux,
3836 DRM_DEBUG_KMS("Could not write test response to sink\n");
3840 intel_dp_check_mst_status(struct intel_dp *intel_dp)
3844 if (intel_dp->is_mst) {
3849 bret = intel_dp_get_sink_irq_esi(intel_dp, esi);
3853 /* check link status - esi[10] = 0x200c */
3854 if (intel_dp->active_streams &&
3855 !drm_dp_channel_eq_ok(&esi[10], intel_dp->lane_count)) {
3856 DRM_DEBUG_KMS("channel EQ not ok, retraining\n");
3857 intel_dp_start_link_train(intel_dp);
3858 intel_dp_stop_link_train(intel_dp);
3861 DRM_DEBUG_KMS("got esi %3ph\n", esi);
3862 ret = drm_dp_mst_hpd_irq(&intel_dp->mst_mgr, esi, &handled);
3865 for (retry = 0; retry < 3; retry++) {
3867 wret = drm_dp_dpcd_write(&intel_dp->aux,
3868 DP_SINK_COUNT_ESI+1,
3875 bret = intel_dp_get_sink_irq_esi(intel_dp, esi);
3877 DRM_DEBUG_KMS("got esi2 %3ph\n", esi);
3885 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
3886 DRM_DEBUG_KMS("failed to get ESI - device may have failed\n");
3887 intel_dp->is_mst = false;
3888 drm_dp_mst_topology_mgr_set_mst(&intel_dp->mst_mgr, intel_dp->is_mst);
3889 /* send a hotplug event */
3890 drm_kms_helper_hotplug_event(intel_dig_port->base.base.dev);
3897 intel_dp_check_link_status(struct intel_dp *intel_dp)
3899 struct intel_encoder *intel_encoder = &dp_to_dig_port(intel_dp)->base;
3900 struct drm_device *dev = intel_dp_to_dev(intel_dp);
3901 u8 link_status[DP_LINK_STATUS_SIZE];
3903 WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));
3905 if (!intel_dp_get_link_status(intel_dp, link_status)) {
3906 DRM_ERROR("Failed to get link status\n");
3910 if (!intel_encoder->base.crtc)
3913 if (!to_intel_crtc(intel_encoder->base.crtc)->active)
3916 /* if link training is requested we should perform it always */
3917 if ((intel_dp->compliance_test_type == DP_TEST_LINK_TRAINING) ||
3918 (!drm_dp_channel_eq_ok(link_status, intel_dp->lane_count))) {
3919 DRM_DEBUG_KMS("%s: channel EQ not ok, retraining\n",
3920 intel_encoder->base.name);
3921 intel_dp_start_link_train(intel_dp);
3922 intel_dp_stop_link_train(intel_dp);
3927 * According to DP spec
3930 * 2. Configure link according to Receiver Capabilities
3931 * 3. Use Link Training from 2.5.3.3 and 3.5.1.3
3932 * 4. Check link status on receipt of hot-plug interrupt
3934 * intel_dp_short_pulse - handles short pulse interrupts
3935 * when full detection is not required.
3936 * Returns %true if short pulse is handled and full detection
3937 * is NOT required and %false otherwise.
3940 intel_dp_short_pulse(struct intel_dp *intel_dp)
3942 struct drm_device *dev = intel_dp_to_dev(intel_dp);
3943 u8 sink_irq_vector = 0;
3944 u8 old_sink_count = intel_dp->sink_count;
3948 * Clearing compliance test variables to allow capturing
3949 * of values for next automated test request.
3951 intel_dp->compliance_test_active = 0;
3952 intel_dp->compliance_test_type = 0;
3953 intel_dp->compliance_test_data = 0;
3956 * Now read the DPCD to see if it's actually running
3957 * If the current value of sink count doesn't match with
3958 * the value that was stored earlier or dpcd read failed
3959 * we need to do full detection
3961 ret = intel_dp_get_dpcd(intel_dp);
3963 if ((old_sink_count != intel_dp->sink_count) || !ret) {
3964 /* No need to proceed if we are going to do full detect */
3968 /* Try to read the source of the interrupt */
3969 if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11 &&
3970 intel_dp_get_sink_irq(intel_dp, &sink_irq_vector) &&
3971 sink_irq_vector != 0) {
3972 /* Clear interrupt source */
3973 drm_dp_dpcd_writeb(&intel_dp->aux,
3974 DP_DEVICE_SERVICE_IRQ_VECTOR,
3977 if (sink_irq_vector & DP_AUTOMATED_TEST_REQUEST)
3978 DRM_DEBUG_DRIVER("Test request in short pulse not handled\n");
3979 if (sink_irq_vector & (DP_CP_IRQ | DP_SINK_SPECIFIC_IRQ))
3980 DRM_DEBUG_DRIVER("CP or sink specific irq unhandled\n");
3983 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
3984 intel_dp_check_link_status(intel_dp);
3985 drm_modeset_unlock(&dev->mode_config.connection_mutex);
3990 /* XXX this is probably wrong for multiple downstream ports */
3991 static enum drm_connector_status
3992 intel_dp_detect_dpcd(struct intel_dp *intel_dp)
3994 uint8_t *dpcd = intel_dp->dpcd;
3997 if (!intel_dp_get_dpcd(intel_dp))
3998 return connector_status_disconnected;
4000 if (is_edp(intel_dp))
4001 return connector_status_connected;
4003 /* if there's no downstream port, we're done */
4004 if (!(dpcd[DP_DOWNSTREAMPORT_PRESENT] & DP_DWN_STRM_PORT_PRESENT))
4005 return connector_status_connected;
4007 /* If we're HPD-aware, SINK_COUNT changes dynamically */
4008 if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11 &&
4009 intel_dp->downstream_ports[0] & DP_DS_PORT_HPD) {
4011 return intel_dp->sink_count ?
4012 connector_status_connected : connector_status_disconnected;
4015 if (intel_dp_can_mst(intel_dp))
4016 return connector_status_connected;
4018 /* If no HPD, poke DDC gently */
4019 if (drm_probe_ddc(&intel_dp->aux.ddc))
4020 return connector_status_connected;
4022 /* Well we tried, say unknown for unreliable port types */
4023 if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11) {
4024 type = intel_dp->downstream_ports[0] & DP_DS_PORT_TYPE_MASK;
4025 if (type == DP_DS_PORT_TYPE_VGA ||
4026 type == DP_DS_PORT_TYPE_NON_EDID)
4027 return connector_status_unknown;
4029 type = intel_dp->dpcd[DP_DOWNSTREAMPORT_PRESENT] &
4030 DP_DWN_STRM_PORT_TYPE_MASK;
4031 if (type == DP_DWN_STRM_PORT_TYPE_ANALOG ||
4032 type == DP_DWN_STRM_PORT_TYPE_OTHER)
4033 return connector_status_unknown;
4036 /* Anything else is out of spec, warn and ignore */
4037 DRM_DEBUG_KMS("Broken DP branch device, ignoring\n");
4038 return connector_status_disconnected;
4041 static enum drm_connector_status
4042 edp_detect(struct intel_dp *intel_dp)
4044 struct drm_device *dev = intel_dp_to_dev(intel_dp);
4045 enum drm_connector_status status;
4047 status = intel_panel_detect(dev);
4048 if (status == connector_status_unknown)
4049 status = connector_status_connected;
4054 static bool ibx_digital_port_connected(struct drm_i915_private *dev_priv,
4055 struct intel_digital_port *port)
4059 switch (port->port) {
4063 bit = SDE_PORTB_HOTPLUG;
4066 bit = SDE_PORTC_HOTPLUG;
4069 bit = SDE_PORTD_HOTPLUG;
4072 MISSING_CASE(port->port);
4076 return I915_READ(SDEISR) & bit;
4079 static bool cpt_digital_port_connected(struct drm_i915_private *dev_priv,
4080 struct intel_digital_port *port)
4084 switch (port->port) {
4088 bit = SDE_PORTB_HOTPLUG_CPT;
4091 bit = SDE_PORTC_HOTPLUG_CPT;
4094 bit = SDE_PORTD_HOTPLUG_CPT;
4097 bit = SDE_PORTE_HOTPLUG_SPT;
4100 MISSING_CASE(port->port);
4104 return I915_READ(SDEISR) & bit;
4107 static bool g4x_digital_port_connected(struct drm_i915_private *dev_priv,
4108 struct intel_digital_port *port)
4112 switch (port->port) {
4114 bit = PORTB_HOTPLUG_LIVE_STATUS_G4X;
4117 bit = PORTC_HOTPLUG_LIVE_STATUS_G4X;
4120 bit = PORTD_HOTPLUG_LIVE_STATUS_G4X;
4123 MISSING_CASE(port->port);
4127 return I915_READ(PORT_HOTPLUG_STAT) & bit;
4130 static bool gm45_digital_port_connected(struct drm_i915_private *dev_priv,
4131 struct intel_digital_port *port)
4135 switch (port->port) {
4137 bit = PORTB_HOTPLUG_LIVE_STATUS_GM45;
4140 bit = PORTC_HOTPLUG_LIVE_STATUS_GM45;
4143 bit = PORTD_HOTPLUG_LIVE_STATUS_GM45;
4146 MISSING_CASE(port->port);
4150 return I915_READ(PORT_HOTPLUG_STAT) & bit;
4153 static bool bxt_digital_port_connected(struct drm_i915_private *dev_priv,
4154 struct intel_digital_port *intel_dig_port)
4156 struct intel_encoder *intel_encoder = &intel_dig_port->base;
4160 intel_hpd_pin_to_port(intel_encoder->hpd_pin, &port);
4163 bit = BXT_DE_PORT_HP_DDIA;
4166 bit = BXT_DE_PORT_HP_DDIB;
4169 bit = BXT_DE_PORT_HP_DDIC;
4176 return I915_READ(GEN8_DE_PORT_ISR) & bit;
4180 * intel_digital_port_connected - is the specified port connected?
4181 * @dev_priv: i915 private structure
4182 * @port: the port to test
4184 * Return %true if @port is connected, %false otherwise.
4186 bool intel_digital_port_connected(struct drm_i915_private *dev_priv,
4187 struct intel_digital_port *port)
4189 if (HAS_PCH_IBX(dev_priv))
4190 return ibx_digital_port_connected(dev_priv, port);
4191 else if (HAS_PCH_SPLIT(dev_priv))
4192 return cpt_digital_port_connected(dev_priv, port);
4193 else if (IS_BROXTON(dev_priv))
4194 return bxt_digital_port_connected(dev_priv, port);
4195 else if (IS_GM45(dev_priv))
4196 return gm45_digital_port_connected(dev_priv, port);
4198 return g4x_digital_port_connected(dev_priv, port);
4201 static struct edid *
4202 intel_dp_get_edid(struct intel_dp *intel_dp)
4204 struct intel_connector *intel_connector = intel_dp->attached_connector;
4206 /* use cached edid if we have one */
4207 if (intel_connector->edid) {
4209 if (IS_ERR(intel_connector->edid))
4212 return drm_edid_duplicate(intel_connector->edid);
4214 return drm_get_edid(&intel_connector->base,
4215 &intel_dp->aux.ddc);
4219 intel_dp_set_edid(struct intel_dp *intel_dp)
4221 struct intel_connector *intel_connector = intel_dp->attached_connector;
4224 intel_dp_unset_edid(intel_dp);
4225 edid = intel_dp_get_edid(intel_dp);
4226 intel_connector->detect_edid = edid;
4228 if (intel_dp->force_audio != HDMI_AUDIO_AUTO)
4229 intel_dp->has_audio = intel_dp->force_audio == HDMI_AUDIO_ON;
4231 intel_dp->has_audio = drm_detect_monitor_audio(edid);
4235 intel_dp_unset_edid(struct intel_dp *intel_dp)
4237 struct intel_connector *intel_connector = intel_dp->attached_connector;
4239 kfree(intel_connector->detect_edid);
4240 intel_connector->detect_edid = NULL;
4242 intel_dp->has_audio = false;
4246 intel_dp_long_pulse(struct intel_connector *intel_connector)
4248 struct drm_connector *connector = &intel_connector->base;
4249 struct intel_dp *intel_dp = intel_attached_dp(connector);
4250 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
4251 struct intel_encoder *intel_encoder = &intel_dig_port->base;
4252 struct drm_device *dev = connector->dev;
4253 enum drm_connector_status status;
4254 enum intel_display_power_domain power_domain;
4255 u8 sink_irq_vector = 0;
4257 power_domain = intel_display_port_aux_power_domain(intel_encoder);
4258 intel_display_power_get(to_i915(dev), power_domain);
4260 /* Can't disconnect eDP, but you can close the lid... */
4261 if (is_edp(intel_dp))
4262 status = edp_detect(intel_dp);
4263 else if (intel_digital_port_connected(to_i915(dev),
4264 dp_to_dig_port(intel_dp)))
4265 status = intel_dp_detect_dpcd(intel_dp);
4267 status = connector_status_disconnected;
4269 if (status != connector_status_connected) {
4270 intel_dp->compliance_test_active = 0;
4271 intel_dp->compliance_test_type = 0;
4272 intel_dp->compliance_test_data = 0;
4274 if (intel_dp->is_mst) {
4275 DRM_DEBUG_KMS("MST device may have disappeared %d vs %d\n",
4277 intel_dp->mst_mgr.mst_state);
4278 intel_dp->is_mst = false;
4279 drm_dp_mst_topology_mgr_set_mst(&intel_dp->mst_mgr,
4286 if (intel_encoder->type != INTEL_OUTPUT_EDP)
4287 intel_encoder->type = INTEL_OUTPUT_DP;
4289 DRM_DEBUG_KMS("Display Port TPS3 support: source %s, sink %s\n",
4290 yesno(intel_dp_source_supports_hbr2(intel_dp)),
4291 yesno(drm_dp_tps3_supported(intel_dp->dpcd)));
4293 intel_dp_print_rates(intel_dp);
4295 intel_dp_probe_oui(intel_dp);
4297 intel_dp_configure_mst(intel_dp);
4299 if (intel_dp->is_mst) {
4301 * If we are in MST mode then this connector
4302 * won't appear connected or have anything
4305 status = connector_status_disconnected;
4307 } else if (connector->status == connector_status_connected) {
4309 * If display was connected already and is still connected
4310 * check links status, there has been known issues of
4311 * link loss triggerring long pulse!!!!
4313 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
4314 intel_dp_check_link_status(intel_dp);
4315 drm_modeset_unlock(&dev->mode_config.connection_mutex);
4320 * Clearing NACK and defer counts to get their exact values
4321 * while reading EDID which are required by Compliance tests
4322 * 4.2.2.4 and 4.2.2.5
4324 intel_dp->aux.i2c_nack_count = 0;
4325 intel_dp->aux.i2c_defer_count = 0;
4327 intel_dp_set_edid(intel_dp);
4329 status = connector_status_connected;
4330 intel_dp->detect_done = true;
4332 /* Try to read the source of the interrupt */
4333 if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11 &&
4334 intel_dp_get_sink_irq(intel_dp, &sink_irq_vector) &&
4335 sink_irq_vector != 0) {
4336 /* Clear interrupt source */
4337 drm_dp_dpcd_writeb(&intel_dp->aux,
4338 DP_DEVICE_SERVICE_IRQ_VECTOR,
4341 if (sink_irq_vector & DP_AUTOMATED_TEST_REQUEST)
4342 intel_dp_handle_test_request(intel_dp);
4343 if (sink_irq_vector & (DP_CP_IRQ | DP_SINK_SPECIFIC_IRQ))
4344 DRM_DEBUG_DRIVER("CP or sink specific irq unhandled\n");
4348 if ((status != connector_status_connected) &&
4349 (intel_dp->is_mst == false))
4350 intel_dp_unset_edid(intel_dp);
4352 intel_display_power_put(to_i915(dev), power_domain);
4356 static enum drm_connector_status
4357 intel_dp_detect(struct drm_connector *connector, bool force)
4359 struct intel_dp *intel_dp = intel_attached_dp(connector);
4360 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
4361 struct intel_encoder *intel_encoder = &intel_dig_port->base;
4362 struct intel_connector *intel_connector = to_intel_connector(connector);
4364 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
4365 connector->base.id, connector->name);
4367 if (intel_dp->is_mst) {
4368 /* MST devices are disconnected from a monitor POV */
4369 intel_dp_unset_edid(intel_dp);
4370 if (intel_encoder->type != INTEL_OUTPUT_EDP)
4371 intel_encoder->type = INTEL_OUTPUT_DP;
4372 return connector_status_disconnected;
4375 /* If full detect is not performed yet, do a full detect */
4376 if (!intel_dp->detect_done)
4377 intel_dp_long_pulse(intel_dp->attached_connector);
4379 intel_dp->detect_done = false;
4381 if (is_edp(intel_dp) || intel_connector->detect_edid)
4382 return connector_status_connected;
4384 return connector_status_disconnected;
4388 intel_dp_force(struct drm_connector *connector)
4390 struct intel_dp *intel_dp = intel_attached_dp(connector);
4391 struct intel_encoder *intel_encoder = &dp_to_dig_port(intel_dp)->base;
4392 struct drm_i915_private *dev_priv = to_i915(intel_encoder->base.dev);
4393 enum intel_display_power_domain power_domain;
4395 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
4396 connector->base.id, connector->name);
4397 intel_dp_unset_edid(intel_dp);
4399 if (connector->status != connector_status_connected)
4402 power_domain = intel_display_port_aux_power_domain(intel_encoder);
4403 intel_display_power_get(dev_priv, power_domain);
4405 intel_dp_set_edid(intel_dp);
4407 intel_display_power_put(dev_priv, power_domain);
4409 if (intel_encoder->type != INTEL_OUTPUT_EDP)
4410 intel_encoder->type = INTEL_OUTPUT_DP;
4413 static int intel_dp_get_modes(struct drm_connector *connector)
4415 struct intel_connector *intel_connector = to_intel_connector(connector);
4418 edid = intel_connector->detect_edid;
4420 int ret = intel_connector_update_modes(connector, edid);
4425 /* if eDP has no EDID, fall back to fixed mode */
4426 if (is_edp(intel_attached_dp(connector)) &&
4427 intel_connector->panel.fixed_mode) {
4428 struct drm_display_mode *mode;
4430 mode = drm_mode_duplicate(connector->dev,
4431 intel_connector->panel.fixed_mode);
4433 drm_mode_probed_add(connector, mode);
4442 intel_dp_detect_audio(struct drm_connector *connector)
4444 bool has_audio = false;
4447 edid = to_intel_connector(connector)->detect_edid;
4449 has_audio = drm_detect_monitor_audio(edid);
4455 intel_dp_set_property(struct drm_connector *connector,
4456 struct drm_property *property,
4459 struct drm_i915_private *dev_priv = to_i915(connector->dev);
4460 struct intel_connector *intel_connector = to_intel_connector(connector);
4461 struct intel_encoder *intel_encoder = intel_attached_encoder(connector);
4462 struct intel_dp *intel_dp = enc_to_intel_dp(&intel_encoder->base);
4465 ret = drm_object_property_set_value(&connector->base, property, val);
4469 if (property == dev_priv->force_audio_property) {
4473 if (i == intel_dp->force_audio)
4476 intel_dp->force_audio = i;
4478 if (i == HDMI_AUDIO_AUTO)
4479 has_audio = intel_dp_detect_audio(connector);
4481 has_audio = (i == HDMI_AUDIO_ON);
4483 if (has_audio == intel_dp->has_audio)
4486 intel_dp->has_audio = has_audio;
4490 if (property == dev_priv->broadcast_rgb_property) {
4491 bool old_auto = intel_dp->color_range_auto;
4492 bool old_range = intel_dp->limited_color_range;
4495 case INTEL_BROADCAST_RGB_AUTO:
4496 intel_dp->color_range_auto = true;
4498 case INTEL_BROADCAST_RGB_FULL:
4499 intel_dp->color_range_auto = false;
4500 intel_dp->limited_color_range = false;
4502 case INTEL_BROADCAST_RGB_LIMITED:
4503 intel_dp->color_range_auto = false;
4504 intel_dp->limited_color_range = true;
4510 if (old_auto == intel_dp->color_range_auto &&
4511 old_range == intel_dp->limited_color_range)
4517 if (is_edp(intel_dp) &&
4518 property == connector->dev->mode_config.scaling_mode_property) {
4519 if (val == DRM_MODE_SCALE_NONE) {
4520 DRM_DEBUG_KMS("no scaling not supported\n");
4523 if (HAS_GMCH_DISPLAY(dev_priv) &&
4524 val == DRM_MODE_SCALE_CENTER) {
4525 DRM_DEBUG_KMS("centering not supported\n");
4529 if (intel_connector->panel.fitting_mode == val) {
4530 /* the eDP scaling property is not changed */
4533 intel_connector->panel.fitting_mode = val;
4541 if (intel_encoder->base.crtc)
4542 intel_crtc_restore_mode(intel_encoder->base.crtc);
4548 intel_dp_connector_register(struct drm_connector *connector)
4550 struct intel_dp *intel_dp = intel_attached_dp(connector);
4553 ret = intel_connector_register(connector);
4557 i915_debugfs_connector_add(connector);
4559 DRM_DEBUG_KMS("registering %s bus for %s\n",
4560 intel_dp->aux.name, connector->kdev->kobj.name);
4562 intel_dp->aux.dev = connector->kdev;
4563 return drm_dp_aux_register(&intel_dp->aux);
4567 intel_dp_connector_unregister(struct drm_connector *connector)
4569 drm_dp_aux_unregister(&intel_attached_dp(connector)->aux);
4570 intel_connector_unregister(connector);
4574 intel_dp_connector_destroy(struct drm_connector *connector)
4576 struct intel_connector *intel_connector = to_intel_connector(connector);
4578 kfree(intel_connector->detect_edid);
4580 if (!IS_ERR_OR_NULL(intel_connector->edid))
4581 kfree(intel_connector->edid);
4583 /* Can't call is_edp() since the encoder may have been destroyed
4585 if (connector->connector_type == DRM_MODE_CONNECTOR_eDP)
4586 intel_panel_fini(&intel_connector->panel);
4588 drm_connector_cleanup(connector);
4592 void intel_dp_encoder_destroy(struct drm_encoder *encoder)
4594 struct intel_digital_port *intel_dig_port = enc_to_dig_port(encoder);
4595 struct intel_dp *intel_dp = &intel_dig_port->dp;
4597 intel_dp_mst_encoder_cleanup(intel_dig_port);
4598 if (is_edp(intel_dp)) {
4599 cancel_delayed_work_sync(&intel_dp->panel_vdd_work);
4601 * vdd might still be enabled do to the delayed vdd off.
4602 * Make sure vdd is actually turned off here.
4605 edp_panel_vdd_off_sync(intel_dp);
4606 pps_unlock(intel_dp);
4608 if (intel_dp->edp_notifier.notifier_call) {
4609 unregister_reboot_notifier(&intel_dp->edp_notifier);
4610 intel_dp->edp_notifier.notifier_call = NULL;
4614 intel_dp_aux_fini(intel_dp);
4616 drm_encoder_cleanup(encoder);
4617 kfree(intel_dig_port);
4620 void intel_dp_encoder_suspend(struct intel_encoder *intel_encoder)
4622 struct intel_dp *intel_dp = enc_to_intel_dp(&intel_encoder->base);
4624 if (!is_edp(intel_dp))
4628 * vdd might still be enabled do to the delayed vdd off.
4629 * Make sure vdd is actually turned off here.
4631 cancel_delayed_work_sync(&intel_dp->panel_vdd_work);
4633 edp_panel_vdd_off_sync(intel_dp);
4634 pps_unlock(intel_dp);
4637 static void intel_edp_panel_vdd_sanitize(struct intel_dp *intel_dp)
4639 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
4640 struct drm_device *dev = intel_dig_port->base.base.dev;
4641 struct drm_i915_private *dev_priv = to_i915(dev);
4642 enum intel_display_power_domain power_domain;
4644 lockdep_assert_held(&dev_priv->pps_mutex);
4646 if (!edp_have_panel_vdd(intel_dp))
4650 * The VDD bit needs a power domain reference, so if the bit is
4651 * already enabled when we boot or resume, grab this reference and
4652 * schedule a vdd off, so we don't hold on to the reference
4655 DRM_DEBUG_KMS("VDD left on by BIOS, adjusting state tracking\n");
4656 power_domain = intel_display_port_aux_power_domain(&intel_dig_port->base);
4657 intel_display_power_get(dev_priv, power_domain);
4659 edp_panel_vdd_schedule_off(intel_dp);
4662 void intel_dp_encoder_reset(struct drm_encoder *encoder)
4664 struct drm_i915_private *dev_priv = to_i915(encoder->dev);
4665 struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
4667 if (!HAS_DDI(dev_priv))
4668 intel_dp->DP = I915_READ(intel_dp->output_reg);
4670 if (to_intel_encoder(encoder)->type != INTEL_OUTPUT_EDP)
4676 * Read out the current power sequencer assignment,
4677 * in case the BIOS did something with it.
4679 if (IS_VALLEYVIEW(encoder->dev) || IS_CHERRYVIEW(encoder->dev))
4680 vlv_initial_power_sequencer_setup(intel_dp);
4682 intel_edp_panel_vdd_sanitize(intel_dp);
4684 pps_unlock(intel_dp);
4687 static const struct drm_connector_funcs intel_dp_connector_funcs = {
4688 .dpms = drm_atomic_helper_connector_dpms,
4689 .detect = intel_dp_detect,
4690 .force = intel_dp_force,
4691 .fill_modes = drm_helper_probe_single_connector_modes,
4692 .set_property = intel_dp_set_property,
4693 .atomic_get_property = intel_connector_atomic_get_property,
4694 .late_register = intel_dp_connector_register,
4695 .early_unregister = intel_dp_connector_unregister,
4696 .destroy = intel_dp_connector_destroy,
4697 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
4698 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
4701 static const struct drm_connector_helper_funcs intel_dp_connector_helper_funcs = {
4702 .get_modes = intel_dp_get_modes,
4703 .mode_valid = intel_dp_mode_valid,
4706 static const struct drm_encoder_funcs intel_dp_enc_funcs = {
4707 .reset = intel_dp_encoder_reset,
4708 .destroy = intel_dp_encoder_destroy,
4712 intel_dp_hpd_pulse(struct intel_digital_port *intel_dig_port, bool long_hpd)
4714 struct intel_dp *intel_dp = &intel_dig_port->dp;
4715 struct intel_encoder *intel_encoder = &intel_dig_port->base;
4716 struct drm_device *dev = intel_dig_port->base.base.dev;
4717 struct drm_i915_private *dev_priv = to_i915(dev);
4718 enum intel_display_power_domain power_domain;
4719 enum irqreturn ret = IRQ_NONE;
4721 if (intel_dig_port->base.type != INTEL_OUTPUT_EDP &&
4722 intel_dig_port->base.type != INTEL_OUTPUT_HDMI)
4723 intel_dig_port->base.type = INTEL_OUTPUT_DP;
4725 if (long_hpd && intel_dig_port->base.type == INTEL_OUTPUT_EDP) {
4727 * vdd off can generate a long pulse on eDP which
4728 * would require vdd on to handle it, and thus we
4729 * would end up in an endless cycle of
4730 * "vdd off -> long hpd -> vdd on -> detect -> vdd off -> ..."
4732 DRM_DEBUG_KMS("ignoring long hpd on eDP port %c\n",
4733 port_name(intel_dig_port->port));
4737 DRM_DEBUG_KMS("got hpd irq on port %c - %s\n",
4738 port_name(intel_dig_port->port),
4739 long_hpd ? "long" : "short");
4741 power_domain = intel_display_port_aux_power_domain(intel_encoder);
4742 intel_display_power_get(dev_priv, power_domain);
4745 intel_dp_long_pulse(intel_dp->attached_connector);
4746 if (intel_dp->is_mst)
4751 if (intel_dp->is_mst) {
4752 if (intel_dp_check_mst_status(intel_dp) == -EINVAL) {
4754 * If we were in MST mode, and device is not
4755 * there, get out of MST mode
4757 DRM_DEBUG_KMS("MST device may have disappeared %d vs %d\n",
4758 intel_dp->is_mst, intel_dp->mst_mgr.mst_state);
4759 intel_dp->is_mst = false;
4760 drm_dp_mst_topology_mgr_set_mst(&intel_dp->mst_mgr,
4766 if (!intel_dp->is_mst) {
4767 if (!intel_dp_short_pulse(intel_dp)) {
4768 intel_dp_long_pulse(intel_dp->attached_connector);
4777 intel_display_power_put(dev_priv, power_domain);
4782 /* check the VBT to see whether the eDP is on another port */
4783 bool intel_dp_is_edp(struct drm_device *dev, enum port port)
4785 struct drm_i915_private *dev_priv = to_i915(dev);
4788 * eDP not supported on g4x. so bail out early just
4789 * for a bit extra safety in case the VBT is bonkers.
4791 if (INTEL_INFO(dev)->gen < 5)
4797 return intel_bios_is_port_edp(dev_priv, port);
4801 intel_dp_add_properties(struct intel_dp *intel_dp, struct drm_connector *connector)
4803 struct intel_connector *intel_connector = to_intel_connector(connector);
4805 intel_attach_force_audio_property(connector);
4806 intel_attach_broadcast_rgb_property(connector);
4807 intel_dp->color_range_auto = true;
4809 if (is_edp(intel_dp)) {
4810 drm_mode_create_scaling_mode_property(connector->dev);
4811 drm_object_attach_property(
4813 connector->dev->mode_config.scaling_mode_property,
4814 DRM_MODE_SCALE_ASPECT);
4815 intel_connector->panel.fitting_mode = DRM_MODE_SCALE_ASPECT;
4819 static void intel_dp_init_panel_power_timestamps(struct intel_dp *intel_dp)
4821 intel_dp->panel_power_off_time = ktime_get_boottime();
4822 intel_dp->last_power_on = jiffies;
4823 intel_dp->last_backlight_off = jiffies;
4827 intel_pps_readout_hw_state(struct drm_i915_private *dev_priv,
4828 struct intel_dp *intel_dp, struct edp_power_seq *seq)
4830 u32 pp_on, pp_off, pp_div = 0, pp_ctl = 0;
4831 struct pps_registers regs;
4833 intel_pps_get_registers(dev_priv, intel_dp, ®s);
4835 /* Workaround: Need to write PP_CONTROL with the unlock key as
4836 * the very first thing. */
4837 pp_ctl = ironlake_get_pp_control(intel_dp);
4839 pp_on = I915_READ(regs.pp_on);
4840 pp_off = I915_READ(regs.pp_off);
4841 if (!IS_BROXTON(dev_priv)) {
4842 I915_WRITE(regs.pp_ctrl, pp_ctl);
4843 pp_div = I915_READ(regs.pp_div);
4846 /* Pull timing values out of registers */
4847 seq->t1_t3 = (pp_on & PANEL_POWER_UP_DELAY_MASK) >>
4848 PANEL_POWER_UP_DELAY_SHIFT;
4850 seq->t8 = (pp_on & PANEL_LIGHT_ON_DELAY_MASK) >>
4851 PANEL_LIGHT_ON_DELAY_SHIFT;
4853 seq->t9 = (pp_off & PANEL_LIGHT_OFF_DELAY_MASK) >>
4854 PANEL_LIGHT_OFF_DELAY_SHIFT;
4856 seq->t10 = (pp_off & PANEL_POWER_DOWN_DELAY_MASK) >>
4857 PANEL_POWER_DOWN_DELAY_SHIFT;
4859 if (IS_BROXTON(dev_priv)) {
4860 u16 tmp = (pp_ctl & BXT_POWER_CYCLE_DELAY_MASK) >>
4861 BXT_POWER_CYCLE_DELAY_SHIFT;
4863 seq->t11_t12 = (tmp - 1) * 1000;
4867 seq->t11_t12 = ((pp_div & PANEL_POWER_CYCLE_DELAY_MASK) >>
4868 PANEL_POWER_CYCLE_DELAY_SHIFT) * 1000;
4873 intel_pps_dump_state(const char *state_name, const struct edp_power_seq *seq)
4875 DRM_DEBUG_KMS("%s t1_t3 %d t8 %d t9 %d t10 %d t11_t12 %d\n",
4877 seq->t1_t3, seq->t8, seq->t9, seq->t10, seq->t11_t12);
4881 intel_pps_verify_state(struct drm_i915_private *dev_priv,
4882 struct intel_dp *intel_dp)
4884 struct edp_power_seq hw;
4885 struct edp_power_seq *sw = &intel_dp->pps_delays;
4887 intel_pps_readout_hw_state(dev_priv, intel_dp, &hw);
4889 if (hw.t1_t3 != sw->t1_t3 || hw.t8 != sw->t8 || hw.t9 != sw->t9 ||
4890 hw.t10 != sw->t10 || hw.t11_t12 != sw->t11_t12) {
4891 DRM_ERROR("PPS state mismatch\n");
4892 intel_pps_dump_state("sw", sw);
4893 intel_pps_dump_state("hw", &hw);
4898 intel_dp_init_panel_power_sequencer(struct drm_device *dev,
4899 struct intel_dp *intel_dp)
4901 struct drm_i915_private *dev_priv = to_i915(dev);
4902 struct edp_power_seq cur, vbt, spec,
4903 *final = &intel_dp->pps_delays;
4905 lockdep_assert_held(&dev_priv->pps_mutex);
4907 /* already initialized? */
4908 if (final->t11_t12 != 0)
4911 intel_pps_readout_hw_state(dev_priv, intel_dp, &cur);
4913 intel_pps_dump_state("cur", &cur);
4915 vbt = dev_priv->vbt.edp.pps;
4917 /* Upper limits from eDP 1.3 spec. Note that we use the clunky units of
4918 * our hw here, which are all in 100usec. */
4919 spec.t1_t3 = 210 * 10;
4920 spec.t8 = 50 * 10; /* no limit for t8, use t7 instead */
4921 spec.t9 = 50 * 10; /* no limit for t9, make it symmetric with t8 */
4922 spec.t10 = 500 * 10;
4923 /* This one is special and actually in units of 100ms, but zero
4924 * based in the hw (so we need to add 100 ms). But the sw vbt
4925 * table multiplies it with 1000 to make it in units of 100usec,
4927 spec.t11_t12 = (510 + 100) * 10;
4929 intel_pps_dump_state("vbt", &vbt);
4931 /* Use the max of the register settings and vbt. If both are
4932 * unset, fall back to the spec limits. */
4933 #define assign_final(field) final->field = (max(cur.field, vbt.field) == 0 ? \
4935 max(cur.field, vbt.field))
4936 assign_final(t1_t3);
4940 assign_final(t11_t12);
4943 #define get_delay(field) (DIV_ROUND_UP(final->field, 10))
4944 intel_dp->panel_power_up_delay = get_delay(t1_t3);
4945 intel_dp->backlight_on_delay = get_delay(t8);
4946 intel_dp->backlight_off_delay = get_delay(t9);
4947 intel_dp->panel_power_down_delay = get_delay(t10);
4948 intel_dp->panel_power_cycle_delay = get_delay(t11_t12);
4951 DRM_DEBUG_KMS("panel power up delay %d, power down delay %d, power cycle delay %d\n",
4952 intel_dp->panel_power_up_delay, intel_dp->panel_power_down_delay,
4953 intel_dp->panel_power_cycle_delay);
4955 DRM_DEBUG_KMS("backlight on delay %d, off delay %d\n",
4956 intel_dp->backlight_on_delay, intel_dp->backlight_off_delay);
4959 * We override the HW backlight delays to 1 because we do manual waits
4960 * on them. For T8, even BSpec recommends doing it. For T9, if we
4961 * don't do this, we'll end up waiting for the backlight off delay
4962 * twice: once when we do the manual sleep, and once when we disable
4963 * the panel and wait for the PP_STATUS bit to become zero.
4970 intel_dp_init_panel_power_sequencer_registers(struct drm_device *dev,
4971 struct intel_dp *intel_dp)
4973 struct drm_i915_private *dev_priv = to_i915(dev);
4974 u32 pp_on, pp_off, pp_div, port_sel = 0;
4975 int div = dev_priv->rawclk_freq / 1000;
4976 struct pps_registers regs;
4977 enum port port = dp_to_dig_port(intel_dp)->port;
4978 const struct edp_power_seq *seq = &intel_dp->pps_delays;
4980 lockdep_assert_held(&dev_priv->pps_mutex);
4982 intel_pps_get_registers(dev_priv, intel_dp, ®s);
4984 pp_on = (seq->t1_t3 << PANEL_POWER_UP_DELAY_SHIFT) |
4985 (seq->t8 << PANEL_LIGHT_ON_DELAY_SHIFT);
4986 pp_off = (seq->t9 << PANEL_LIGHT_OFF_DELAY_SHIFT) |
4987 (seq->t10 << PANEL_POWER_DOWN_DELAY_SHIFT);
4988 /* Compute the divisor for the pp clock, simply match the Bspec
4990 if (IS_BROXTON(dev)) {
4991 pp_div = I915_READ(regs.pp_ctrl);
4992 pp_div &= ~BXT_POWER_CYCLE_DELAY_MASK;
4993 pp_div |= (DIV_ROUND_UP((seq->t11_t12 + 1), 1000)
4994 << BXT_POWER_CYCLE_DELAY_SHIFT);
4996 pp_div = ((100 * div)/2 - 1) << PP_REFERENCE_DIVIDER_SHIFT;
4997 pp_div |= (DIV_ROUND_UP(seq->t11_t12, 1000)
4998 << PANEL_POWER_CYCLE_DELAY_SHIFT);
5001 /* Haswell doesn't have any port selection bits for the panel
5002 * power sequencer any more. */
5003 if (IS_VALLEYVIEW(dev) || IS_CHERRYVIEW(dev)) {
5004 port_sel = PANEL_PORT_SELECT_VLV(port);
5005 } else if (HAS_PCH_IBX(dev) || HAS_PCH_CPT(dev)) {
5007 port_sel = PANEL_PORT_SELECT_DPA;
5009 port_sel = PANEL_PORT_SELECT_DPD;
5014 I915_WRITE(regs.pp_on, pp_on);
5015 I915_WRITE(regs.pp_off, pp_off);
5016 if (IS_BROXTON(dev))
5017 I915_WRITE(regs.pp_ctrl, pp_div);
5019 I915_WRITE(regs.pp_div, pp_div);
5021 DRM_DEBUG_KMS("panel power sequencer register settings: PP_ON %#x, PP_OFF %#x, PP_DIV %#x\n",
5022 I915_READ(regs.pp_on),
5023 I915_READ(regs.pp_off),
5025 (I915_READ(regs.pp_ctrl) & BXT_POWER_CYCLE_DELAY_MASK) :
5026 I915_READ(regs.pp_div));
5030 * intel_dp_set_drrs_state - program registers for RR switch to take effect
5032 * @refresh_rate: RR to be programmed
5034 * This function gets called when refresh rate (RR) has to be changed from
5035 * one frequency to another. Switches can be between high and low RR
5036 * supported by the panel or to any other RR based on media playback (in
5037 * this case, RR value needs to be passed from user space).
5039 * The caller of this function needs to take a lock on dev_priv->drrs.
5041 static void intel_dp_set_drrs_state(struct drm_device *dev, int refresh_rate)
5043 struct drm_i915_private *dev_priv = to_i915(dev);
5044 struct intel_encoder *encoder;
5045 struct intel_digital_port *dig_port = NULL;
5046 struct intel_dp *intel_dp = dev_priv->drrs.dp;
5047 struct intel_crtc_state *config = NULL;
5048 struct intel_crtc *intel_crtc = NULL;
5049 enum drrs_refresh_rate_type index = DRRS_HIGH_RR;
5051 if (refresh_rate <= 0) {
5052 DRM_DEBUG_KMS("Refresh rate should be positive non-zero.\n");
5056 if (intel_dp == NULL) {
5057 DRM_DEBUG_KMS("DRRS not supported.\n");
5062 * FIXME: This needs proper synchronization with psr state for some
5063 * platforms that cannot have PSR and DRRS enabled at the same time.
5066 dig_port = dp_to_dig_port(intel_dp);
5067 encoder = &dig_port->base;
5068 intel_crtc = to_intel_crtc(encoder->base.crtc);
5071 DRM_DEBUG_KMS("DRRS: intel_crtc not initialized\n");
5075 config = intel_crtc->config;
5077 if (dev_priv->drrs.type < SEAMLESS_DRRS_SUPPORT) {
5078 DRM_DEBUG_KMS("Only Seamless DRRS supported.\n");
5082 if (intel_dp->attached_connector->panel.downclock_mode->vrefresh ==
5084 index = DRRS_LOW_RR;
5086 if (index == dev_priv->drrs.refresh_rate_type) {
5088 "DRRS requested for previously set RR...ignoring\n");
5092 if (!intel_crtc->active) {
5093 DRM_DEBUG_KMS("eDP encoder disabled. CRTC not Active\n");
5097 if (INTEL_INFO(dev)->gen >= 8 && !IS_CHERRYVIEW(dev)) {
5100 intel_dp_set_m_n(intel_crtc, M1_N1);
5103 intel_dp_set_m_n(intel_crtc, M2_N2);
5107 DRM_ERROR("Unsupported refreshrate type\n");
5109 } else if (INTEL_INFO(dev)->gen > 6) {
5110 i915_reg_t reg = PIPECONF(intel_crtc->config->cpu_transcoder);
5113 val = I915_READ(reg);
5114 if (index > DRRS_HIGH_RR) {
5115 if (IS_VALLEYVIEW(dev) || IS_CHERRYVIEW(dev))
5116 val |= PIPECONF_EDP_RR_MODE_SWITCH_VLV;
5118 val |= PIPECONF_EDP_RR_MODE_SWITCH;
5120 if (IS_VALLEYVIEW(dev) || IS_CHERRYVIEW(dev))
5121 val &= ~PIPECONF_EDP_RR_MODE_SWITCH_VLV;
5123 val &= ~PIPECONF_EDP_RR_MODE_SWITCH;
5125 I915_WRITE(reg, val);
5128 dev_priv->drrs.refresh_rate_type = index;
5130 DRM_DEBUG_KMS("eDP Refresh Rate set to : %dHz\n", refresh_rate);
5134 * intel_edp_drrs_enable - init drrs struct if supported
5135 * @intel_dp: DP struct
5137 * Initializes frontbuffer_bits and drrs.dp
5139 void intel_edp_drrs_enable(struct intel_dp *intel_dp)
5141 struct drm_device *dev = intel_dp_to_dev(intel_dp);
5142 struct drm_i915_private *dev_priv = to_i915(dev);
5143 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
5144 struct drm_crtc *crtc = dig_port->base.base.crtc;
5145 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
5147 if (!intel_crtc->config->has_drrs) {
5148 DRM_DEBUG_KMS("Panel doesn't support DRRS\n");
5152 mutex_lock(&dev_priv->drrs.mutex);
5153 if (WARN_ON(dev_priv->drrs.dp)) {
5154 DRM_ERROR("DRRS already enabled\n");
5158 dev_priv->drrs.busy_frontbuffer_bits = 0;
5160 dev_priv->drrs.dp = intel_dp;
5163 mutex_unlock(&dev_priv->drrs.mutex);
5167 * intel_edp_drrs_disable - Disable DRRS
5168 * @intel_dp: DP struct
5171 void intel_edp_drrs_disable(struct intel_dp *intel_dp)
5173 struct drm_device *dev = intel_dp_to_dev(intel_dp);
5174 struct drm_i915_private *dev_priv = to_i915(dev);
5175 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
5176 struct drm_crtc *crtc = dig_port->base.base.crtc;
5177 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
5179 if (!intel_crtc->config->has_drrs)
5182 mutex_lock(&dev_priv->drrs.mutex);
5183 if (!dev_priv->drrs.dp) {
5184 mutex_unlock(&dev_priv->drrs.mutex);
5188 if (dev_priv->drrs.refresh_rate_type == DRRS_LOW_RR)
5189 intel_dp_set_drrs_state(&dev_priv->drm,
5190 intel_dp->attached_connector->panel.
5191 fixed_mode->vrefresh);
5193 dev_priv->drrs.dp = NULL;
5194 mutex_unlock(&dev_priv->drrs.mutex);
5196 cancel_delayed_work_sync(&dev_priv->drrs.work);
5199 static void intel_edp_drrs_downclock_work(struct work_struct *work)
5201 struct drm_i915_private *dev_priv =
5202 container_of(work, typeof(*dev_priv), drrs.work.work);
5203 struct intel_dp *intel_dp;
5205 mutex_lock(&dev_priv->drrs.mutex);
5207 intel_dp = dev_priv->drrs.dp;
5213 * The delayed work can race with an invalidate hence we need to
5217 if (dev_priv->drrs.busy_frontbuffer_bits)
5220 if (dev_priv->drrs.refresh_rate_type != DRRS_LOW_RR)
5221 intel_dp_set_drrs_state(&dev_priv->drm,
5222 intel_dp->attached_connector->panel.
5223 downclock_mode->vrefresh);
5226 mutex_unlock(&dev_priv->drrs.mutex);
5230 * intel_edp_drrs_invalidate - Disable Idleness DRRS
5231 * @dev_priv: i915 device
5232 * @frontbuffer_bits: frontbuffer plane tracking bits
5234 * This function gets called everytime rendering on the given planes start.
5235 * Hence DRRS needs to be Upclocked, i.e. (LOW_RR -> HIGH_RR).
5237 * Dirty frontbuffers relevant to DRRS are tracked in busy_frontbuffer_bits.
5239 void intel_edp_drrs_invalidate(struct drm_i915_private *dev_priv,
5240 unsigned int frontbuffer_bits)
5242 struct drm_crtc *crtc;
5245 if (dev_priv->drrs.type == DRRS_NOT_SUPPORTED)
5248 cancel_delayed_work(&dev_priv->drrs.work);
5250 mutex_lock(&dev_priv->drrs.mutex);
5251 if (!dev_priv->drrs.dp) {
5252 mutex_unlock(&dev_priv->drrs.mutex);
5256 crtc = dp_to_dig_port(dev_priv->drrs.dp)->base.base.crtc;
5257 pipe = to_intel_crtc(crtc)->pipe;
5259 frontbuffer_bits &= INTEL_FRONTBUFFER_ALL_MASK(pipe);
5260 dev_priv->drrs.busy_frontbuffer_bits |= frontbuffer_bits;
5262 /* invalidate means busy screen hence upclock */
5263 if (frontbuffer_bits && dev_priv->drrs.refresh_rate_type == DRRS_LOW_RR)
5264 intel_dp_set_drrs_state(&dev_priv->drm,
5265 dev_priv->drrs.dp->attached_connector->panel.
5266 fixed_mode->vrefresh);
5268 mutex_unlock(&dev_priv->drrs.mutex);
5272 * intel_edp_drrs_flush - Restart Idleness DRRS
5273 * @dev_priv: i915 device
5274 * @frontbuffer_bits: frontbuffer plane tracking bits
5276 * This function gets called every time rendering on the given planes has
5277 * completed or flip on a crtc is completed. So DRRS should be upclocked
5278 * (LOW_RR -> HIGH_RR). And also Idleness detection should be started again,
5279 * if no other planes are dirty.
5281 * Dirty frontbuffers relevant to DRRS are tracked in busy_frontbuffer_bits.
5283 void intel_edp_drrs_flush(struct drm_i915_private *dev_priv,
5284 unsigned int frontbuffer_bits)
5286 struct drm_crtc *crtc;
5289 if (dev_priv->drrs.type == DRRS_NOT_SUPPORTED)
5292 cancel_delayed_work(&dev_priv->drrs.work);
5294 mutex_lock(&dev_priv->drrs.mutex);
5295 if (!dev_priv->drrs.dp) {
5296 mutex_unlock(&dev_priv->drrs.mutex);
5300 crtc = dp_to_dig_port(dev_priv->drrs.dp)->base.base.crtc;
5301 pipe = to_intel_crtc(crtc)->pipe;
5303 frontbuffer_bits &= INTEL_FRONTBUFFER_ALL_MASK(pipe);
5304 dev_priv->drrs.busy_frontbuffer_bits &= ~frontbuffer_bits;
5306 /* flush means busy screen hence upclock */
5307 if (frontbuffer_bits && dev_priv->drrs.refresh_rate_type == DRRS_LOW_RR)
5308 intel_dp_set_drrs_state(&dev_priv->drm,
5309 dev_priv->drrs.dp->attached_connector->panel.
5310 fixed_mode->vrefresh);
5313 * flush also means no more activity hence schedule downclock, if all
5314 * other fbs are quiescent too
5316 if (!dev_priv->drrs.busy_frontbuffer_bits)
5317 schedule_delayed_work(&dev_priv->drrs.work,
5318 msecs_to_jiffies(1000));
5319 mutex_unlock(&dev_priv->drrs.mutex);
5323 * DOC: Display Refresh Rate Switching (DRRS)
5325 * Display Refresh Rate Switching (DRRS) is a power conservation feature
5326 * which enables swtching between low and high refresh rates,
5327 * dynamically, based on the usage scenario. This feature is applicable
5328 * for internal panels.
5330 * Indication that the panel supports DRRS is given by the panel EDID, which
5331 * would list multiple refresh rates for one resolution.
5333 * DRRS is of 2 types - static and seamless.
5334 * Static DRRS involves changing refresh rate (RR) by doing a full modeset
5335 * (may appear as a blink on screen) and is used in dock-undock scenario.
5336 * Seamless DRRS involves changing RR without any visual effect to the user
5337 * and can be used during normal system usage. This is done by programming
5338 * certain registers.
5340 * Support for static/seamless DRRS may be indicated in the VBT based on
5341 * inputs from the panel spec.
5343 * DRRS saves power by switching to low RR based on usage scenarios.
5345 * The implementation is based on frontbuffer tracking implementation. When
5346 * there is a disturbance on the screen triggered by user activity or a periodic
5347 * system activity, DRRS is disabled (RR is changed to high RR). When there is
5348 * no movement on screen, after a timeout of 1 second, a switch to low RR is
5351 * For integration with frontbuffer tracking code, intel_edp_drrs_invalidate()
5352 * and intel_edp_drrs_flush() are called.
5354 * DRRS can be further extended to support other internal panels and also
5355 * the scenario of video playback wherein RR is set based on the rate
5356 * requested by userspace.
5360 * intel_dp_drrs_init - Init basic DRRS work and mutex.
5361 * @intel_connector: eDP connector
5362 * @fixed_mode: preferred mode of panel
5364 * This function is called only once at driver load to initialize basic
5368 * Downclock mode if panel supports it, else return NULL.
5369 * DRRS support is determined by the presence of downclock mode (apart
5370 * from VBT setting).
5372 static struct drm_display_mode *
5373 intel_dp_drrs_init(struct intel_connector *intel_connector,
5374 struct drm_display_mode *fixed_mode)
5376 struct drm_connector *connector = &intel_connector->base;
5377 struct drm_device *dev = connector->dev;
5378 struct drm_i915_private *dev_priv = to_i915(dev);
5379 struct drm_display_mode *downclock_mode = NULL;
5381 INIT_DELAYED_WORK(&dev_priv->drrs.work, intel_edp_drrs_downclock_work);
5382 mutex_init(&dev_priv->drrs.mutex);
5384 if (INTEL_INFO(dev)->gen <= 6) {
5385 DRM_DEBUG_KMS("DRRS supported for Gen7 and above\n");
5389 if (dev_priv->vbt.drrs_type != SEAMLESS_DRRS_SUPPORT) {
5390 DRM_DEBUG_KMS("VBT doesn't support DRRS\n");
5394 downclock_mode = intel_find_panel_downclock
5395 (dev, fixed_mode, connector);
5397 if (!downclock_mode) {
5398 DRM_DEBUG_KMS("Downclock mode is not found. DRRS not supported\n");
5402 dev_priv->drrs.type = dev_priv->vbt.drrs_type;
5404 dev_priv->drrs.refresh_rate_type = DRRS_HIGH_RR;
5405 DRM_DEBUG_KMS("seamless DRRS supported for eDP panel.\n");
5406 return downclock_mode;
5409 static bool intel_edp_init_connector(struct intel_dp *intel_dp,
5410 struct intel_connector *intel_connector)
5412 struct drm_connector *connector = &intel_connector->base;
5413 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
5414 struct intel_encoder *intel_encoder = &intel_dig_port->base;
5415 struct drm_device *dev = intel_encoder->base.dev;
5416 struct drm_i915_private *dev_priv = to_i915(dev);
5417 struct drm_display_mode *fixed_mode = NULL;
5418 struct drm_display_mode *downclock_mode = NULL;
5420 struct drm_display_mode *scan;
5422 enum pipe pipe = INVALID_PIPE;
5424 if (!is_edp(intel_dp))
5428 * On IBX/CPT we may get here with LVDS already registered. Since the
5429 * driver uses the only internal power sequencer available for both
5430 * eDP and LVDS bail out early in this case to prevent interfering
5431 * with an already powered-on LVDS power sequencer.
5433 if (intel_get_lvds_encoder(dev)) {
5434 WARN_ON(!(HAS_PCH_IBX(dev_priv) || HAS_PCH_CPT(dev_priv)));
5435 DRM_INFO("LVDS was detected, not registering eDP\n");
5442 intel_dp_init_panel_power_timestamps(intel_dp);
5444 if (IS_VALLEYVIEW(dev) || IS_CHERRYVIEW(dev)) {
5445 vlv_initial_power_sequencer_setup(intel_dp);
5447 intel_dp_init_panel_power_sequencer(dev, intel_dp);
5448 intel_dp_init_panel_power_sequencer_registers(dev, intel_dp);
5451 intel_edp_panel_vdd_sanitize(intel_dp);
5453 pps_unlock(intel_dp);
5455 /* Cache DPCD and EDID for edp. */
5456 has_dpcd = intel_edp_init_dpcd(intel_dp);
5459 /* if this fails, presume the device is a ghost */
5460 DRM_INFO("failed to retrieve link info, disabling eDP\n");
5464 mutex_lock(&dev->mode_config.mutex);
5465 edid = drm_get_edid(connector, &intel_dp->aux.ddc);
5467 if (drm_add_edid_modes(connector, edid)) {
5468 drm_mode_connector_update_edid_property(connector,
5470 drm_edid_to_eld(connector, edid);
5473 edid = ERR_PTR(-EINVAL);
5476 edid = ERR_PTR(-ENOENT);
5478 intel_connector->edid = edid;
5480 /* prefer fixed mode from EDID if available */
5481 list_for_each_entry(scan, &connector->probed_modes, head) {
5482 if ((scan->type & DRM_MODE_TYPE_PREFERRED)) {
5483 fixed_mode = drm_mode_duplicate(dev, scan);
5484 downclock_mode = intel_dp_drrs_init(
5485 intel_connector, fixed_mode);
5490 /* fallback to VBT if available for eDP */
5491 if (!fixed_mode && dev_priv->vbt.lfp_lvds_vbt_mode) {
5492 fixed_mode = drm_mode_duplicate(dev,
5493 dev_priv->vbt.lfp_lvds_vbt_mode);
5495 fixed_mode->type |= DRM_MODE_TYPE_PREFERRED;
5496 connector->display_info.width_mm = fixed_mode->width_mm;
5497 connector->display_info.height_mm = fixed_mode->height_mm;
5500 mutex_unlock(&dev->mode_config.mutex);
5502 if (IS_VALLEYVIEW(dev) || IS_CHERRYVIEW(dev)) {
5503 intel_dp->edp_notifier.notifier_call = edp_notify_handler;
5504 register_reboot_notifier(&intel_dp->edp_notifier);
5507 * Figure out the current pipe for the initial backlight setup.
5508 * If the current pipe isn't valid, try the PPS pipe, and if that
5509 * fails just assume pipe A.
5511 if (IS_CHERRYVIEW(dev))
5512 pipe = DP_PORT_TO_PIPE_CHV(intel_dp->DP);
5514 pipe = PORT_TO_PIPE(intel_dp->DP);
5516 if (pipe != PIPE_A && pipe != PIPE_B)
5517 pipe = intel_dp->pps_pipe;
5519 if (pipe != PIPE_A && pipe != PIPE_B)
5522 DRM_DEBUG_KMS("using pipe %c for initial backlight setup\n",
5526 intel_panel_init(&intel_connector->panel, fixed_mode, downclock_mode);
5527 intel_connector->panel.backlight.power = intel_edp_backlight_power;
5528 intel_panel_setup_backlight(connector, pipe);
5533 cancel_delayed_work_sync(&intel_dp->panel_vdd_work);
5535 * vdd might still be enabled do to the delayed vdd off.
5536 * Make sure vdd is actually turned off here.
5539 edp_panel_vdd_off_sync(intel_dp);
5540 pps_unlock(intel_dp);
5546 intel_dp_init_connector(struct intel_digital_port *intel_dig_port,
5547 struct intel_connector *intel_connector)
5549 struct drm_connector *connector = &intel_connector->base;
5550 struct intel_dp *intel_dp = &intel_dig_port->dp;
5551 struct intel_encoder *intel_encoder = &intel_dig_port->base;
5552 struct drm_device *dev = intel_encoder->base.dev;
5553 struct drm_i915_private *dev_priv = to_i915(dev);
5554 enum port port = intel_dig_port->port;
5557 if (WARN(intel_dig_port->max_lanes < 1,
5558 "Not enough lanes (%d) for DP on port %c\n",
5559 intel_dig_port->max_lanes, port_name(port)))
5562 intel_dp->pps_pipe = INVALID_PIPE;
5564 /* intel_dp vfuncs */
5565 if (INTEL_INFO(dev)->gen >= 9)
5566 intel_dp->get_aux_clock_divider = skl_get_aux_clock_divider;
5567 else if (IS_HASWELL(dev) || IS_BROADWELL(dev))
5568 intel_dp->get_aux_clock_divider = hsw_get_aux_clock_divider;
5569 else if (HAS_PCH_SPLIT(dev))
5570 intel_dp->get_aux_clock_divider = ilk_get_aux_clock_divider;
5572 intel_dp->get_aux_clock_divider = g4x_get_aux_clock_divider;
5574 if (INTEL_INFO(dev)->gen >= 9)
5575 intel_dp->get_aux_send_ctl = skl_get_aux_send_ctl;
5577 intel_dp->get_aux_send_ctl = g4x_get_aux_send_ctl;
5580 intel_dp->prepare_link_retrain = intel_ddi_prepare_link_retrain;
5582 /* Preserve the current hw state. */
5583 intel_dp->DP = I915_READ(intel_dp->output_reg);
5584 intel_dp->attached_connector = intel_connector;
5586 if (intel_dp_is_edp(dev, port))
5587 type = DRM_MODE_CONNECTOR_eDP;
5589 type = DRM_MODE_CONNECTOR_DisplayPort;
5592 * For eDP we always set the encoder type to INTEL_OUTPUT_EDP, but
5593 * for DP the encoder type can be set by the caller to
5594 * INTEL_OUTPUT_UNKNOWN for DDI, so don't rewrite it.
5596 if (type == DRM_MODE_CONNECTOR_eDP)
5597 intel_encoder->type = INTEL_OUTPUT_EDP;
5599 /* eDP only on port B and/or C on vlv/chv */
5600 if (WARN_ON((IS_VALLEYVIEW(dev) || IS_CHERRYVIEW(dev)) &&
5601 is_edp(intel_dp) && port != PORT_B && port != PORT_C))
5604 DRM_DEBUG_KMS("Adding %s connector on port %c\n",
5605 type == DRM_MODE_CONNECTOR_eDP ? "eDP" : "DP",
5608 drm_connector_init(dev, connector, &intel_dp_connector_funcs, type);
5609 drm_connector_helper_add(connector, &intel_dp_connector_helper_funcs);
5611 connector->interlace_allowed = true;
5612 connector->doublescan_allowed = 0;
5614 intel_dp_aux_init(intel_dp, intel_connector);
5616 INIT_DELAYED_WORK(&intel_dp->panel_vdd_work,
5617 edp_panel_vdd_work);
5619 intel_connector_attach_encoder(intel_connector, intel_encoder);
5622 intel_connector->get_hw_state = intel_ddi_connector_get_hw_state;
5624 intel_connector->get_hw_state = intel_connector_get_hw_state;
5626 /* Set up the hotplug pin. */
5629 intel_encoder->hpd_pin = HPD_PORT_A;
5632 intel_encoder->hpd_pin = HPD_PORT_B;
5633 if (IS_BXT_REVID(dev, 0, BXT_REVID_A1))
5634 intel_encoder->hpd_pin = HPD_PORT_A;
5637 intel_encoder->hpd_pin = HPD_PORT_C;
5640 intel_encoder->hpd_pin = HPD_PORT_D;
5643 intel_encoder->hpd_pin = HPD_PORT_E;
5649 /* init MST on ports that can support it */
5650 if (HAS_DP_MST(dev) && !is_edp(intel_dp) &&
5651 (port == PORT_B || port == PORT_C || port == PORT_D))
5652 intel_dp_mst_encoder_init(intel_dig_port,
5653 intel_connector->base.base.id);
5655 if (!intel_edp_init_connector(intel_dp, intel_connector)) {
5656 intel_dp_aux_fini(intel_dp);
5657 intel_dp_mst_encoder_cleanup(intel_dig_port);
5661 intel_dp_add_properties(intel_dp, connector);
5663 /* For G4X desktop chip, PEG_BAND_GAP_DATA 3:0 must first be written
5664 * 0xd. Failure to do so will result in spurious interrupts being
5665 * generated on the port when a cable is not attached.
5667 if (IS_G4X(dev) && !IS_GM45(dev)) {
5668 u32 temp = I915_READ(PEG_BAND_GAP_DATA);
5669 I915_WRITE(PEG_BAND_GAP_DATA, (temp & ~0xf) | 0xd);
5675 drm_connector_cleanup(connector);
5680 bool intel_dp_init(struct drm_device *dev,
5681 i915_reg_t output_reg,
5684 struct drm_i915_private *dev_priv = to_i915(dev);
5685 struct intel_digital_port *intel_dig_port;
5686 struct intel_encoder *intel_encoder;
5687 struct drm_encoder *encoder;
5688 struct intel_connector *intel_connector;
5690 intel_dig_port = kzalloc(sizeof(*intel_dig_port), GFP_KERNEL);
5691 if (!intel_dig_port)
5694 intel_connector = intel_connector_alloc();
5695 if (!intel_connector)
5696 goto err_connector_alloc;
5698 intel_encoder = &intel_dig_port->base;
5699 encoder = &intel_encoder->base;
5701 if (drm_encoder_init(dev, &intel_encoder->base, &intel_dp_enc_funcs,
5702 DRM_MODE_ENCODER_TMDS, "DP %c", port_name(port)))
5703 goto err_encoder_init;
5705 intel_encoder->compute_config = intel_dp_compute_config;
5706 intel_encoder->disable = intel_disable_dp;
5707 intel_encoder->get_hw_state = intel_dp_get_hw_state;
5708 intel_encoder->get_config = intel_dp_get_config;
5709 intel_encoder->suspend = intel_dp_encoder_suspend;
5710 if (IS_CHERRYVIEW(dev)) {
5711 intel_encoder->pre_pll_enable = chv_dp_pre_pll_enable;
5712 intel_encoder->pre_enable = chv_pre_enable_dp;
5713 intel_encoder->enable = vlv_enable_dp;
5714 intel_encoder->post_disable = chv_post_disable_dp;
5715 intel_encoder->post_pll_disable = chv_dp_post_pll_disable;
5716 } else if (IS_VALLEYVIEW(dev)) {
5717 intel_encoder->pre_pll_enable = vlv_dp_pre_pll_enable;
5718 intel_encoder->pre_enable = vlv_pre_enable_dp;
5719 intel_encoder->enable = vlv_enable_dp;
5720 intel_encoder->post_disable = vlv_post_disable_dp;
5722 intel_encoder->pre_enable = g4x_pre_enable_dp;
5723 intel_encoder->enable = g4x_enable_dp;
5724 if (INTEL_INFO(dev)->gen >= 5)
5725 intel_encoder->post_disable = ilk_post_disable_dp;
5728 intel_dig_port->port = port;
5729 intel_dig_port->dp.output_reg = output_reg;
5730 intel_dig_port->max_lanes = 4;
5732 intel_encoder->type = INTEL_OUTPUT_DP;
5733 if (IS_CHERRYVIEW(dev)) {
5735 intel_encoder->crtc_mask = 1 << 2;
5737 intel_encoder->crtc_mask = (1 << 0) | (1 << 1);
5739 intel_encoder->crtc_mask = (1 << 0) | (1 << 1) | (1 << 2);
5741 intel_encoder->cloneable = 0;
5743 intel_dig_port->hpd_pulse = intel_dp_hpd_pulse;
5744 dev_priv->hotplug.irq_port[port] = intel_dig_port;
5746 if (!intel_dp_init_connector(intel_dig_port, intel_connector))
5747 goto err_init_connector;
5752 drm_encoder_cleanup(encoder);
5754 kfree(intel_connector);
5755 err_connector_alloc:
5756 kfree(intel_dig_port);
5760 void intel_dp_mst_suspend(struct drm_device *dev)
5762 struct drm_i915_private *dev_priv = to_i915(dev);
5766 for (i = 0; i < I915_MAX_PORTS; i++) {
5767 struct intel_digital_port *intel_dig_port = dev_priv->hotplug.irq_port[i];
5769 if (!intel_dig_port || !intel_dig_port->dp.can_mst)
5772 if (intel_dig_port->dp.is_mst)
5773 drm_dp_mst_topology_mgr_suspend(&intel_dig_port->dp.mst_mgr);
5777 void intel_dp_mst_resume(struct drm_device *dev)
5779 struct drm_i915_private *dev_priv = to_i915(dev);
5782 for (i = 0; i < I915_MAX_PORTS; i++) {
5783 struct intel_digital_port *intel_dig_port = dev_priv->hotplug.irq_port[i];
5786 if (!intel_dig_port || !intel_dig_port->dp.can_mst)
5789 ret = drm_dp_mst_topology_mgr_resume(&intel_dig_port->dp.mst_mgr);
5791 intel_dp_check_mst_status(&intel_dig_port->dp);