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>
34 #include "drm_crtc_helper.h"
35 #include "intel_drv.h"
38 #include "drm_dp_helper.h"
40 #define DP_RECEIVER_CAP_SIZE 0xf
41 #define DP_LINK_STATUS_SIZE 6
42 #define DP_LINK_CHECK_TIMEOUT (10 * 1000)
44 #define DP_LINK_CONFIGURATION_SIZE 9
47 struct intel_encoder base;
50 uint8_t link_configuration[DP_LINK_CONFIGURATION_SIZE];
52 enum hdmi_force_audio force_audio;
57 uint8_t dpcd[DP_RECEIVER_CAP_SIZE];
58 struct i2c_adapter adapter;
59 struct i2c_algo_dp_aux_data algo;
62 int panel_power_up_delay;
63 int panel_power_down_delay;
64 int panel_power_cycle_delay;
65 int backlight_on_delay;
66 int backlight_off_delay;
67 struct drm_display_mode *panel_fixed_mode; /* for eDP */
68 struct delayed_work panel_vdd_work;
73 * is_edp - is the given port attached to an eDP panel (either CPU or PCH)
74 * @intel_dp: DP struct
76 * If a CPU or PCH DP output is attached to an eDP panel, this function
77 * will return true, and false otherwise.
79 static bool is_edp(struct intel_dp *intel_dp)
81 return intel_dp->base.type == INTEL_OUTPUT_EDP;
85 * is_pch_edp - is the port on the PCH and attached to an eDP panel?
86 * @intel_dp: DP struct
88 * Returns true if the given DP struct corresponds to a PCH DP port attached
89 * to an eDP panel, false otherwise. Helpful for determining whether we
90 * may need FDI resources for a given DP output or not.
92 static bool is_pch_edp(struct intel_dp *intel_dp)
94 return intel_dp->is_pch_edp;
98 * is_cpu_edp - is the port on the CPU and attached to an eDP panel?
99 * @intel_dp: DP struct
101 * Returns true if the given DP struct corresponds to a CPU eDP port.
103 static bool is_cpu_edp(struct intel_dp *intel_dp)
105 return is_edp(intel_dp) && !is_pch_edp(intel_dp);
108 static struct intel_dp *enc_to_intel_dp(struct drm_encoder *encoder)
110 return container_of(encoder, struct intel_dp, base.base);
113 static struct intel_dp *intel_attached_dp(struct drm_connector *connector)
115 return container_of(intel_attached_encoder(connector),
116 struct intel_dp, base);
120 * intel_encoder_is_pch_edp - is the given encoder a PCH attached eDP?
121 * @encoder: DRM encoder
123 * Return true if @encoder corresponds to a PCH attached eDP panel. Needed
124 * by intel_display.c.
126 bool intel_encoder_is_pch_edp(struct drm_encoder *encoder)
128 struct intel_dp *intel_dp;
133 intel_dp = enc_to_intel_dp(encoder);
135 return is_pch_edp(intel_dp);
138 static void intel_dp_start_link_train(struct intel_dp *intel_dp);
139 static void intel_dp_complete_link_train(struct intel_dp *intel_dp);
140 static void intel_dp_link_down(struct intel_dp *intel_dp);
143 intel_edp_link_config(struct intel_encoder *intel_encoder,
144 int *lane_num, int *link_bw)
146 struct intel_dp *intel_dp = container_of(intel_encoder, struct intel_dp, base);
148 *lane_num = intel_dp->lane_count;
149 if (intel_dp->link_bw == DP_LINK_BW_1_62)
151 else if (intel_dp->link_bw == DP_LINK_BW_2_7)
156 intel_dp_max_lane_count(struct intel_dp *intel_dp)
158 int max_lane_count = intel_dp->dpcd[DP_MAX_LANE_COUNT] & 0x1f;
159 switch (max_lane_count) {
160 case 1: case 2: case 4:
165 return max_lane_count;
169 intel_dp_max_link_bw(struct intel_dp *intel_dp)
171 int max_link_bw = intel_dp->dpcd[DP_MAX_LINK_RATE];
173 switch (max_link_bw) {
174 case DP_LINK_BW_1_62:
178 max_link_bw = DP_LINK_BW_1_62;
185 intel_dp_link_clock(uint8_t link_bw)
187 if (link_bw == DP_LINK_BW_2_7)
194 * The units on the numbers in the next two are... bizarre. Examples will
195 * make it clearer; this one parallels an example in the eDP spec.
197 * intel_dp_max_data_rate for one lane of 2.7GHz evaluates as:
199 * 270000 * 1 * 8 / 10 == 216000
201 * The actual data capacity of that configuration is 2.16Gbit/s, so the
202 * units are decakilobits. ->clock in a drm_display_mode is in kilohertz -
203 * or equivalently, kilopixels per second - so for 1680x1050R it'd be
204 * 119000. At 18bpp that's 2142000 kilobits per second.
206 * Thus the strange-looking division by 10 in intel_dp_link_required, to
207 * get the result in decakilobits instead of kilobits.
211 intel_dp_link_required(int pixel_clock, int bpp)
213 return (pixel_clock * bpp + 9) / 10;
217 intel_dp_max_data_rate(int max_link_clock, int max_lanes)
219 return (max_link_clock * max_lanes * 8) / 10;
223 intel_dp_mode_valid(struct drm_connector *connector,
224 struct drm_display_mode *mode)
226 struct intel_dp *intel_dp = intel_attached_dp(connector);
227 int max_link_clock = intel_dp_link_clock(intel_dp_max_link_bw(intel_dp));
228 int max_lanes = intel_dp_max_lane_count(intel_dp);
229 int max_rate, mode_rate;
231 if (is_edp(intel_dp) && intel_dp->panel_fixed_mode) {
232 if (mode->hdisplay > intel_dp->panel_fixed_mode->hdisplay)
235 if (mode->vdisplay > intel_dp->panel_fixed_mode->vdisplay)
239 mode_rate = intel_dp_link_required(mode->clock, 24);
240 max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes);
242 if (mode_rate > max_rate) {
243 mode_rate = intel_dp_link_required(mode->clock, 18);
244 if (mode_rate > max_rate)
245 return MODE_CLOCK_HIGH;
247 mode->private_flags |= INTEL_MODE_DP_FORCE_6BPC;
250 if (mode->clock < 10000)
251 return MODE_CLOCK_LOW;
257 pack_aux(uint8_t *src, int src_bytes)
264 for (i = 0; i < src_bytes; i++)
265 v |= ((uint32_t) src[i]) << ((3-i) * 8);
270 unpack_aux(uint32_t src, uint8_t *dst, int dst_bytes)
275 for (i = 0; i < dst_bytes; i++)
276 dst[i] = src >> ((3-i) * 8);
279 /* hrawclock is 1/4 the FSB frequency */
281 intel_hrawclk(struct drm_device *dev)
283 struct drm_i915_private *dev_priv = dev->dev_private;
286 clkcfg = I915_READ(CLKCFG);
287 switch (clkcfg & CLKCFG_FSB_MASK) {
296 case CLKCFG_FSB_1067:
298 case CLKCFG_FSB_1333:
300 /* these two are just a guess; one of them might be right */
301 case CLKCFG_FSB_1600:
302 case CLKCFG_FSB_1600_ALT:
309 static bool ironlake_edp_have_panel_power(struct intel_dp *intel_dp)
311 struct drm_device *dev = intel_dp->base.base.dev;
312 struct drm_i915_private *dev_priv = dev->dev_private;
314 return (I915_READ(PCH_PP_STATUS) & PP_ON) != 0;
317 static bool ironlake_edp_have_panel_vdd(struct intel_dp *intel_dp)
319 struct drm_device *dev = intel_dp->base.base.dev;
320 struct drm_i915_private *dev_priv = dev->dev_private;
322 return (I915_READ(PCH_PP_CONTROL) & EDP_FORCE_VDD) != 0;
326 intel_dp_check_edp(struct intel_dp *intel_dp)
328 struct drm_device *dev = intel_dp->base.base.dev;
329 struct drm_i915_private *dev_priv = dev->dev_private;
331 if (!is_edp(intel_dp))
333 if (!ironlake_edp_have_panel_power(intel_dp) && !ironlake_edp_have_panel_vdd(intel_dp)) {
334 WARN(1, "eDP powered off while attempting aux channel communication.\n");
335 DRM_DEBUG_KMS("Status 0x%08x Control 0x%08x\n",
336 I915_READ(PCH_PP_STATUS),
337 I915_READ(PCH_PP_CONTROL));
342 intel_dp_aux_ch(struct intel_dp *intel_dp,
343 uint8_t *send, int send_bytes,
344 uint8_t *recv, int recv_size)
346 uint32_t output_reg = intel_dp->output_reg;
347 struct drm_device *dev = intel_dp->base.base.dev;
348 struct drm_i915_private *dev_priv = dev->dev_private;
349 uint32_t ch_ctl = output_reg + 0x10;
350 uint32_t ch_data = ch_ctl + 4;
354 uint32_t aux_clock_divider;
355 int try, precharge = 5;
357 intel_dp_check_edp(intel_dp);
358 /* The clock divider is based off the hrawclk,
359 * and would like to run at 2MHz. So, take the
360 * hrawclk value and divide by 2 and use that
362 * Note that PCH attached eDP panels should use a 125MHz input
365 if (is_cpu_edp(intel_dp)) {
366 if (IS_GEN6(dev) || IS_GEN7(dev))
367 aux_clock_divider = 200; /* SNB & IVB eDP input clock at 400Mhz */
369 aux_clock_divider = 225; /* eDP input clock at 450Mhz */
370 } else if (HAS_PCH_SPLIT(dev))
371 aux_clock_divider = 63; /* IRL input clock fixed at 125Mhz */
373 aux_clock_divider = intel_hrawclk(dev) / 2;
375 /* Try to wait for any previous AUX channel activity */
376 for (try = 0; try < 3; try++) {
377 status = I915_READ(ch_ctl);
378 if ((status & DP_AUX_CH_CTL_SEND_BUSY) == 0)
384 WARN(1, "dp_aux_ch not started status 0x%08x\n",
389 /* Must try at least 3 times according to DP spec */
390 for (try = 0; try < 5; try++) {
391 /* Load the send data into the aux channel data registers */
392 for (i = 0; i < send_bytes; i += 4)
393 I915_WRITE(ch_data + i,
394 pack_aux(send + i, send_bytes - i));
396 /* Send the command and wait for it to complete */
398 DP_AUX_CH_CTL_SEND_BUSY |
399 DP_AUX_CH_CTL_TIME_OUT_400us |
400 (send_bytes << DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT) |
401 (precharge << DP_AUX_CH_CTL_PRECHARGE_2US_SHIFT) |
402 (aux_clock_divider << DP_AUX_CH_CTL_BIT_CLOCK_2X_SHIFT) |
404 DP_AUX_CH_CTL_TIME_OUT_ERROR |
405 DP_AUX_CH_CTL_RECEIVE_ERROR);
407 status = I915_READ(ch_ctl);
408 if ((status & DP_AUX_CH_CTL_SEND_BUSY) == 0)
413 /* Clear done status and any errors */
417 DP_AUX_CH_CTL_TIME_OUT_ERROR |
418 DP_AUX_CH_CTL_RECEIVE_ERROR);
420 if (status & (DP_AUX_CH_CTL_TIME_OUT_ERROR |
421 DP_AUX_CH_CTL_RECEIVE_ERROR))
423 if (status & DP_AUX_CH_CTL_DONE)
427 if ((status & DP_AUX_CH_CTL_DONE) == 0) {
428 DRM_ERROR("dp_aux_ch not done status 0x%08x\n", status);
432 /* Check for timeout or receive error.
433 * Timeouts occur when the sink is not connected
435 if (status & DP_AUX_CH_CTL_RECEIVE_ERROR) {
436 DRM_ERROR("dp_aux_ch receive error status 0x%08x\n", status);
440 /* Timeouts occur when the device isn't connected, so they're
441 * "normal" -- don't fill the kernel log with these */
442 if (status & DP_AUX_CH_CTL_TIME_OUT_ERROR) {
443 DRM_DEBUG_KMS("dp_aux_ch timeout status 0x%08x\n", status);
447 /* Unload any bytes sent back from the other side */
448 recv_bytes = ((status & DP_AUX_CH_CTL_MESSAGE_SIZE_MASK) >>
449 DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT);
450 if (recv_bytes > recv_size)
451 recv_bytes = recv_size;
453 for (i = 0; i < recv_bytes; i += 4)
454 unpack_aux(I915_READ(ch_data + i),
455 recv + i, recv_bytes - i);
460 /* Write data to the aux channel in native mode */
462 intel_dp_aux_native_write(struct intel_dp *intel_dp,
463 uint16_t address, uint8_t *send, int send_bytes)
470 intel_dp_check_edp(intel_dp);
473 msg[0] = AUX_NATIVE_WRITE << 4;
474 msg[1] = address >> 8;
475 msg[2] = address & 0xff;
476 msg[3] = send_bytes - 1;
477 memcpy(&msg[4], send, send_bytes);
478 msg_bytes = send_bytes + 4;
480 ret = intel_dp_aux_ch(intel_dp, msg, msg_bytes, &ack, 1);
483 if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_ACK)
485 else if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_DEFER)
493 /* Write a single byte to the aux channel in native mode */
495 intel_dp_aux_native_write_1(struct intel_dp *intel_dp,
496 uint16_t address, uint8_t byte)
498 return intel_dp_aux_native_write(intel_dp, address, &byte, 1);
501 /* read bytes from a native aux channel */
503 intel_dp_aux_native_read(struct intel_dp *intel_dp,
504 uint16_t address, uint8_t *recv, int recv_bytes)
513 intel_dp_check_edp(intel_dp);
514 msg[0] = AUX_NATIVE_READ << 4;
515 msg[1] = address >> 8;
516 msg[2] = address & 0xff;
517 msg[3] = recv_bytes - 1;
520 reply_bytes = recv_bytes + 1;
523 ret = intel_dp_aux_ch(intel_dp, msg, msg_bytes,
530 if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_ACK) {
531 memcpy(recv, reply + 1, ret - 1);
534 else if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_DEFER)
542 intel_dp_i2c_aux_ch(struct i2c_adapter *adapter, int mode,
543 uint8_t write_byte, uint8_t *read_byte)
545 struct i2c_algo_dp_aux_data *algo_data = adapter->algo_data;
546 struct intel_dp *intel_dp = container_of(adapter,
549 uint16_t address = algo_data->address;
557 intel_dp_check_edp(intel_dp);
558 /* Set up the command byte */
559 if (mode & MODE_I2C_READ)
560 msg[0] = AUX_I2C_READ << 4;
562 msg[0] = AUX_I2C_WRITE << 4;
564 if (!(mode & MODE_I2C_STOP))
565 msg[0] |= AUX_I2C_MOT << 4;
567 msg[1] = address >> 8;
588 for (retry = 0; retry < 5; retry++) {
589 ret = intel_dp_aux_ch(intel_dp,
593 DRM_DEBUG_KMS("aux_ch failed %d\n", ret);
597 switch (reply[0] & AUX_NATIVE_REPLY_MASK) {
598 case AUX_NATIVE_REPLY_ACK:
599 /* I2C-over-AUX Reply field is only valid
600 * when paired with AUX ACK.
603 case AUX_NATIVE_REPLY_NACK:
604 DRM_DEBUG_KMS("aux_ch native nack\n");
606 case AUX_NATIVE_REPLY_DEFER:
610 DRM_ERROR("aux_ch invalid native reply 0x%02x\n",
615 switch (reply[0] & AUX_I2C_REPLY_MASK) {
616 case AUX_I2C_REPLY_ACK:
617 if (mode == MODE_I2C_READ) {
618 *read_byte = reply[1];
620 return reply_bytes - 1;
621 case AUX_I2C_REPLY_NACK:
622 DRM_DEBUG_KMS("aux_i2c nack\n");
624 case AUX_I2C_REPLY_DEFER:
625 DRM_DEBUG_KMS("aux_i2c defer\n");
629 DRM_ERROR("aux_i2c invalid reply 0x%02x\n", reply[0]);
634 DRM_ERROR("too many retries, giving up\n");
638 static void ironlake_edp_panel_vdd_on(struct intel_dp *intel_dp);
639 static void ironlake_edp_panel_vdd_off(struct intel_dp *intel_dp, bool sync);
642 intel_dp_i2c_init(struct intel_dp *intel_dp,
643 struct intel_connector *intel_connector, const char *name)
647 DRM_DEBUG_KMS("i2c_init %s\n", name);
648 intel_dp->algo.running = false;
649 intel_dp->algo.address = 0;
650 intel_dp->algo.aux_ch = intel_dp_i2c_aux_ch;
652 memset(&intel_dp->adapter, '\0', sizeof(intel_dp->adapter));
653 intel_dp->adapter.owner = THIS_MODULE;
654 intel_dp->adapter.class = I2C_CLASS_DDC;
655 strncpy(intel_dp->adapter.name, name, sizeof(intel_dp->adapter.name) - 1);
656 intel_dp->adapter.name[sizeof(intel_dp->adapter.name) - 1] = '\0';
657 intel_dp->adapter.algo_data = &intel_dp->algo;
658 intel_dp->adapter.dev.parent = &intel_connector->base.kdev;
660 ironlake_edp_panel_vdd_on(intel_dp);
661 ret = i2c_dp_aux_add_bus(&intel_dp->adapter);
662 ironlake_edp_panel_vdd_off(intel_dp, false);
667 intel_dp_mode_fixup(struct drm_encoder *encoder, struct drm_display_mode *mode,
668 struct drm_display_mode *adjusted_mode)
670 struct drm_device *dev = encoder->dev;
671 struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
672 int lane_count, clock;
673 int max_lane_count = intel_dp_max_lane_count(intel_dp);
674 int max_clock = intel_dp_max_link_bw(intel_dp) == DP_LINK_BW_2_7 ? 1 : 0;
675 int bpp = mode->private_flags & INTEL_MODE_DP_FORCE_6BPC ? 18 : 24;
676 static int bws[2] = { DP_LINK_BW_1_62, DP_LINK_BW_2_7 };
678 if (is_edp(intel_dp) && intel_dp->panel_fixed_mode) {
679 intel_fixed_panel_mode(intel_dp->panel_fixed_mode, adjusted_mode);
680 intel_pch_panel_fitting(dev, DRM_MODE_SCALE_FULLSCREEN,
681 mode, adjusted_mode);
683 * the mode->clock is used to calculate the Data&Link M/N
684 * of the pipe. For the eDP the fixed clock should be used.
686 mode->clock = intel_dp->panel_fixed_mode->clock;
689 for (lane_count = 1; lane_count <= max_lane_count; lane_count <<= 1) {
690 for (clock = 0; clock <= max_clock; clock++) {
691 int link_avail = intel_dp_max_data_rate(intel_dp_link_clock(bws[clock]), lane_count);
693 if (intel_dp_link_required(mode->clock, bpp)
695 intel_dp->link_bw = bws[clock];
696 intel_dp->lane_count = lane_count;
697 adjusted_mode->clock = intel_dp_link_clock(intel_dp->link_bw);
698 DRM_DEBUG_KMS("Display port link bw %02x lane "
699 "count %d clock %d\n",
700 intel_dp->link_bw, intel_dp->lane_count,
701 adjusted_mode->clock);
710 struct intel_dp_m_n {
719 intel_reduce_ratio(uint32_t *num, uint32_t *den)
721 while (*num > 0xffffff || *den > 0xffffff) {
728 intel_dp_compute_m_n(int bpp,
732 struct intel_dp_m_n *m_n)
735 m_n->gmch_m = (pixel_clock * bpp) >> 3;
736 m_n->gmch_n = link_clock * nlanes;
737 intel_reduce_ratio(&m_n->gmch_m, &m_n->gmch_n);
738 m_n->link_m = pixel_clock;
739 m_n->link_n = link_clock;
740 intel_reduce_ratio(&m_n->link_m, &m_n->link_n);
744 intel_dp_set_m_n(struct drm_crtc *crtc, struct drm_display_mode *mode,
745 struct drm_display_mode *adjusted_mode)
747 struct drm_device *dev = crtc->dev;
748 struct drm_mode_config *mode_config = &dev->mode_config;
749 struct drm_encoder *encoder;
750 struct drm_i915_private *dev_priv = dev->dev_private;
751 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
753 struct intel_dp_m_n m_n;
754 int pipe = intel_crtc->pipe;
757 * Find the lane count in the intel_encoder private
759 list_for_each_entry(encoder, &mode_config->encoder_list, head) {
760 struct intel_dp *intel_dp;
762 if (encoder->crtc != crtc)
765 intel_dp = enc_to_intel_dp(encoder);
766 if (intel_dp->base.type == INTEL_OUTPUT_DISPLAYPORT ||
767 intel_dp->base.type == INTEL_OUTPUT_EDP)
769 lane_count = intel_dp->lane_count;
775 * Compute the GMCH and Link ratios. The '3' here is
776 * the number of bytes_per_pixel post-LUT, which we always
777 * set up for 8-bits of R/G/B, or 3 bytes total.
779 intel_dp_compute_m_n(intel_crtc->bpp, lane_count,
780 mode->clock, adjusted_mode->clock, &m_n);
782 if (HAS_PCH_SPLIT(dev)) {
783 I915_WRITE(TRANSDATA_M1(pipe),
784 ((m_n.tu - 1) << PIPE_GMCH_DATA_M_TU_SIZE_SHIFT) |
786 I915_WRITE(TRANSDATA_N1(pipe), m_n.gmch_n);
787 I915_WRITE(TRANSDPLINK_M1(pipe), m_n.link_m);
788 I915_WRITE(TRANSDPLINK_N1(pipe), m_n.link_n);
790 I915_WRITE(PIPE_GMCH_DATA_M(pipe),
791 ((m_n.tu - 1) << PIPE_GMCH_DATA_M_TU_SIZE_SHIFT) |
793 I915_WRITE(PIPE_GMCH_DATA_N(pipe), m_n.gmch_n);
794 I915_WRITE(PIPE_DP_LINK_M(pipe), m_n.link_m);
795 I915_WRITE(PIPE_DP_LINK_N(pipe), m_n.link_n);
799 static void ironlake_edp_pll_on(struct drm_encoder *encoder);
800 static void ironlake_edp_pll_off(struct drm_encoder *encoder);
803 intel_dp_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode,
804 struct drm_display_mode *adjusted_mode)
806 struct drm_device *dev = encoder->dev;
807 struct drm_i915_private *dev_priv = dev->dev_private;
808 struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
809 struct drm_crtc *crtc = intel_dp->base.base.crtc;
810 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
812 /* Turn on the eDP PLL if needed */
813 if (is_edp(intel_dp)) {
814 if (!is_pch_edp(intel_dp))
815 ironlake_edp_pll_on(encoder);
817 ironlake_edp_pll_off(encoder);
821 * There are four kinds of DP registers:
828 * IBX PCH and CPU are the same for almost everything,
829 * except that the CPU DP PLL is configured in this
832 * CPT PCH is quite different, having many bits moved
833 * to the TRANS_DP_CTL register instead. That
834 * configuration happens (oddly) in ironlake_pch_enable
837 /* Preserve the BIOS-computed detected bit. This is
838 * supposed to be read-only.
840 intel_dp->DP = I915_READ(intel_dp->output_reg) & DP_DETECTED;
841 intel_dp->DP |= DP_VOLTAGE_0_4 | DP_PRE_EMPHASIS_0;
843 /* Handle DP bits in common between all three register formats */
845 intel_dp->DP |= DP_VOLTAGE_0_4 | DP_PRE_EMPHASIS_0;
847 switch (intel_dp->lane_count) {
849 intel_dp->DP |= DP_PORT_WIDTH_1;
852 intel_dp->DP |= DP_PORT_WIDTH_2;
855 intel_dp->DP |= DP_PORT_WIDTH_4;
858 if (intel_dp->has_audio) {
859 DRM_DEBUG_DRIVER("Enabling DP audio on pipe %c\n",
860 pipe_name(intel_crtc->pipe));
861 intel_dp->DP |= DP_AUDIO_OUTPUT_ENABLE;
862 intel_write_eld(encoder, adjusted_mode);
864 memset(intel_dp->link_configuration, 0, DP_LINK_CONFIGURATION_SIZE);
865 intel_dp->link_configuration[0] = intel_dp->link_bw;
866 intel_dp->link_configuration[1] = intel_dp->lane_count;
867 intel_dp->link_configuration[8] = DP_SET_ANSI_8B10B;
869 * Check for DPCD version > 1.1 and enhanced framing support
871 if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11 &&
872 (intel_dp->dpcd[DP_MAX_LANE_COUNT] & DP_ENHANCED_FRAME_CAP)) {
873 intel_dp->link_configuration[1] |= DP_LANE_COUNT_ENHANCED_FRAME_EN;
876 /* Split out the IBX/CPU vs CPT settings */
878 if (is_cpu_edp(intel_dp) && IS_GEN7(dev)) {
879 if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
880 intel_dp->DP |= DP_SYNC_HS_HIGH;
881 if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
882 intel_dp->DP |= DP_SYNC_VS_HIGH;
883 intel_dp->DP |= DP_LINK_TRAIN_OFF_CPT;
885 if (intel_dp->link_configuration[1] & DP_LANE_COUNT_ENHANCED_FRAME_EN)
886 intel_dp->DP |= DP_ENHANCED_FRAMING;
888 intel_dp->DP |= intel_crtc->pipe << 29;
890 /* don't miss out required setting for eDP */
891 intel_dp->DP |= DP_PLL_ENABLE;
892 if (adjusted_mode->clock < 200000)
893 intel_dp->DP |= DP_PLL_FREQ_160MHZ;
895 intel_dp->DP |= DP_PLL_FREQ_270MHZ;
896 } else if (!HAS_PCH_CPT(dev) || is_cpu_edp(intel_dp)) {
897 intel_dp->DP |= intel_dp->color_range;
899 if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
900 intel_dp->DP |= DP_SYNC_HS_HIGH;
901 if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
902 intel_dp->DP |= DP_SYNC_VS_HIGH;
903 intel_dp->DP |= DP_LINK_TRAIN_OFF;
905 if (intel_dp->link_configuration[1] & DP_LANE_COUNT_ENHANCED_FRAME_EN)
906 intel_dp->DP |= DP_ENHANCED_FRAMING;
908 if (intel_crtc->pipe == 1)
909 intel_dp->DP |= DP_PIPEB_SELECT;
911 if (is_cpu_edp(intel_dp)) {
912 /* don't miss out required setting for eDP */
913 intel_dp->DP |= DP_PLL_ENABLE;
914 if (adjusted_mode->clock < 200000)
915 intel_dp->DP |= DP_PLL_FREQ_160MHZ;
917 intel_dp->DP |= DP_PLL_FREQ_270MHZ;
920 intel_dp->DP |= DP_LINK_TRAIN_OFF_CPT;
924 #define IDLE_ON_MASK (PP_ON | 0 | PP_SEQUENCE_MASK | 0 | PP_SEQUENCE_STATE_MASK)
925 #define IDLE_ON_VALUE (PP_ON | 0 | PP_SEQUENCE_NONE | 0 | PP_SEQUENCE_STATE_ON_IDLE)
927 #define IDLE_OFF_MASK (PP_ON | 0 | PP_SEQUENCE_MASK | 0 | PP_SEQUENCE_STATE_MASK)
928 #define IDLE_OFF_VALUE (0 | 0 | PP_SEQUENCE_NONE | 0 | PP_SEQUENCE_STATE_OFF_IDLE)
930 #define IDLE_CYCLE_MASK (PP_ON | 0 | PP_SEQUENCE_MASK | PP_CYCLE_DELAY_ACTIVE | PP_SEQUENCE_STATE_MASK)
931 #define IDLE_CYCLE_VALUE (0 | 0 | PP_SEQUENCE_NONE | 0 | PP_SEQUENCE_STATE_OFF_IDLE)
933 static void ironlake_wait_panel_status(struct intel_dp *intel_dp,
937 struct drm_device *dev = intel_dp->base.base.dev;
938 struct drm_i915_private *dev_priv = dev->dev_private;
940 DRM_DEBUG_KMS("mask %08x value %08x status %08x control %08x\n",
942 I915_READ(PCH_PP_STATUS),
943 I915_READ(PCH_PP_CONTROL));
945 if (_wait_for((I915_READ(PCH_PP_STATUS) & mask) == value, 5000, 10)) {
946 DRM_ERROR("Panel status timeout: status %08x control %08x\n",
947 I915_READ(PCH_PP_STATUS),
948 I915_READ(PCH_PP_CONTROL));
952 static void ironlake_wait_panel_on(struct intel_dp *intel_dp)
954 DRM_DEBUG_KMS("Wait for panel power on\n");
955 ironlake_wait_panel_status(intel_dp, IDLE_ON_MASK, IDLE_ON_VALUE);
958 static void ironlake_wait_panel_off(struct intel_dp *intel_dp)
960 DRM_DEBUG_KMS("Wait for panel power off time\n");
961 ironlake_wait_panel_status(intel_dp, IDLE_OFF_MASK, IDLE_OFF_VALUE);
964 static void ironlake_wait_panel_power_cycle(struct intel_dp *intel_dp)
966 DRM_DEBUG_KMS("Wait for panel power cycle\n");
967 ironlake_wait_panel_status(intel_dp, IDLE_CYCLE_MASK, IDLE_CYCLE_VALUE);
971 /* Read the current pp_control value, unlocking the register if it
975 static u32 ironlake_get_pp_control(struct drm_i915_private *dev_priv)
977 u32 control = I915_READ(PCH_PP_CONTROL);
979 control &= ~PANEL_UNLOCK_MASK;
980 control |= PANEL_UNLOCK_REGS;
984 static void ironlake_edp_panel_vdd_on(struct intel_dp *intel_dp)
986 struct drm_device *dev = intel_dp->base.base.dev;
987 struct drm_i915_private *dev_priv = dev->dev_private;
990 if (!is_edp(intel_dp))
992 DRM_DEBUG_KMS("Turn eDP VDD on\n");
994 WARN(intel_dp->want_panel_vdd,
995 "eDP VDD already requested on\n");
997 intel_dp->want_panel_vdd = true;
999 if (ironlake_edp_have_panel_vdd(intel_dp)) {
1000 DRM_DEBUG_KMS("eDP VDD already on\n");
1004 if (!ironlake_edp_have_panel_power(intel_dp))
1005 ironlake_wait_panel_power_cycle(intel_dp);
1007 pp = ironlake_get_pp_control(dev_priv);
1008 pp |= EDP_FORCE_VDD;
1009 I915_WRITE(PCH_PP_CONTROL, pp);
1010 POSTING_READ(PCH_PP_CONTROL);
1011 DRM_DEBUG_KMS("PCH_PP_STATUS: 0x%08x PCH_PP_CONTROL: 0x%08x\n",
1012 I915_READ(PCH_PP_STATUS), I915_READ(PCH_PP_CONTROL));
1015 * If the panel wasn't on, delay before accessing aux channel
1017 if (!ironlake_edp_have_panel_power(intel_dp)) {
1018 DRM_DEBUG_KMS("eDP was not running\n");
1019 msleep(intel_dp->panel_power_up_delay);
1023 static void ironlake_panel_vdd_off_sync(struct intel_dp *intel_dp)
1025 struct drm_device *dev = intel_dp->base.base.dev;
1026 struct drm_i915_private *dev_priv = dev->dev_private;
1029 if (!intel_dp->want_panel_vdd && ironlake_edp_have_panel_vdd(intel_dp)) {
1030 pp = ironlake_get_pp_control(dev_priv);
1031 pp &= ~EDP_FORCE_VDD;
1032 I915_WRITE(PCH_PP_CONTROL, pp);
1033 POSTING_READ(PCH_PP_CONTROL);
1035 /* Make sure sequencer is idle before allowing subsequent activity */
1036 DRM_DEBUG_KMS("PCH_PP_STATUS: 0x%08x PCH_PP_CONTROL: 0x%08x\n",
1037 I915_READ(PCH_PP_STATUS), I915_READ(PCH_PP_CONTROL));
1039 msleep(intel_dp->panel_power_down_delay);
1043 static void ironlake_panel_vdd_work(struct work_struct *__work)
1045 struct intel_dp *intel_dp = container_of(to_delayed_work(__work),
1046 struct intel_dp, panel_vdd_work);
1047 struct drm_device *dev = intel_dp->base.base.dev;
1049 mutex_lock(&dev->mode_config.mutex);
1050 ironlake_panel_vdd_off_sync(intel_dp);
1051 mutex_unlock(&dev->mode_config.mutex);
1054 static void ironlake_edp_panel_vdd_off(struct intel_dp *intel_dp, bool sync)
1056 if (!is_edp(intel_dp))
1059 DRM_DEBUG_KMS("Turn eDP VDD off %d\n", intel_dp->want_panel_vdd);
1060 WARN(!intel_dp->want_panel_vdd, "eDP VDD not forced on");
1062 intel_dp->want_panel_vdd = false;
1065 ironlake_panel_vdd_off_sync(intel_dp);
1068 * Queue the timer to fire a long
1069 * time from now (relative to the power down delay)
1070 * to keep the panel power up across a sequence of operations
1072 schedule_delayed_work(&intel_dp->panel_vdd_work,
1073 msecs_to_jiffies(intel_dp->panel_power_cycle_delay * 5));
1077 static void ironlake_edp_panel_on(struct intel_dp *intel_dp)
1079 struct drm_device *dev = intel_dp->base.base.dev;
1080 struct drm_i915_private *dev_priv = dev->dev_private;
1083 if (!is_edp(intel_dp))
1086 DRM_DEBUG_KMS("Turn eDP power on\n");
1088 if (ironlake_edp_have_panel_power(intel_dp)) {
1089 DRM_DEBUG_KMS("eDP power already on\n");
1093 ironlake_wait_panel_power_cycle(intel_dp);
1095 pp = ironlake_get_pp_control(dev_priv);
1097 /* ILK workaround: disable reset around power sequence */
1098 pp &= ~PANEL_POWER_RESET;
1099 I915_WRITE(PCH_PP_CONTROL, pp);
1100 POSTING_READ(PCH_PP_CONTROL);
1103 pp |= POWER_TARGET_ON;
1105 pp |= PANEL_POWER_RESET;
1107 I915_WRITE(PCH_PP_CONTROL, pp);
1108 POSTING_READ(PCH_PP_CONTROL);
1110 ironlake_wait_panel_on(intel_dp);
1113 pp |= PANEL_POWER_RESET; /* restore panel reset bit */
1114 I915_WRITE(PCH_PP_CONTROL, pp);
1115 POSTING_READ(PCH_PP_CONTROL);
1119 static void ironlake_edp_panel_off(struct intel_dp *intel_dp)
1121 struct drm_device *dev = intel_dp->base.base.dev;
1122 struct drm_i915_private *dev_priv = dev->dev_private;
1125 if (!is_edp(intel_dp))
1128 DRM_DEBUG_KMS("Turn eDP power off\n");
1130 WARN(intel_dp->want_panel_vdd, "Cannot turn power off while VDD is on\n");
1132 pp = ironlake_get_pp_control(dev_priv);
1133 pp &= ~(POWER_TARGET_ON | EDP_FORCE_VDD | PANEL_POWER_RESET | EDP_BLC_ENABLE);
1134 I915_WRITE(PCH_PP_CONTROL, pp);
1135 POSTING_READ(PCH_PP_CONTROL);
1137 ironlake_wait_panel_off(intel_dp);
1140 static void ironlake_edp_backlight_on(struct intel_dp *intel_dp)
1142 struct drm_device *dev = intel_dp->base.base.dev;
1143 struct drm_i915_private *dev_priv = dev->dev_private;
1146 if (!is_edp(intel_dp))
1149 DRM_DEBUG_KMS("\n");
1151 * If we enable the backlight right away following a panel power
1152 * on, we may see slight flicker as the panel syncs with the eDP
1153 * link. So delay a bit to make sure the image is solid before
1154 * allowing it to appear.
1156 msleep(intel_dp->backlight_on_delay);
1157 pp = ironlake_get_pp_control(dev_priv);
1158 pp |= EDP_BLC_ENABLE;
1159 I915_WRITE(PCH_PP_CONTROL, pp);
1160 POSTING_READ(PCH_PP_CONTROL);
1163 static void ironlake_edp_backlight_off(struct intel_dp *intel_dp)
1165 struct drm_device *dev = intel_dp->base.base.dev;
1166 struct drm_i915_private *dev_priv = dev->dev_private;
1169 if (!is_edp(intel_dp))
1172 DRM_DEBUG_KMS("\n");
1173 pp = ironlake_get_pp_control(dev_priv);
1174 pp &= ~EDP_BLC_ENABLE;
1175 I915_WRITE(PCH_PP_CONTROL, pp);
1176 POSTING_READ(PCH_PP_CONTROL);
1177 msleep(intel_dp->backlight_off_delay);
1180 static void ironlake_edp_pll_on(struct drm_encoder *encoder)
1182 struct drm_device *dev = encoder->dev;
1183 struct drm_i915_private *dev_priv = dev->dev_private;
1186 DRM_DEBUG_KMS("\n");
1187 dpa_ctl = I915_READ(DP_A);
1188 dpa_ctl |= DP_PLL_ENABLE;
1189 I915_WRITE(DP_A, dpa_ctl);
1194 static void ironlake_edp_pll_off(struct drm_encoder *encoder)
1196 struct drm_device *dev = encoder->dev;
1197 struct drm_i915_private *dev_priv = dev->dev_private;
1200 dpa_ctl = I915_READ(DP_A);
1201 dpa_ctl &= ~DP_PLL_ENABLE;
1202 I915_WRITE(DP_A, dpa_ctl);
1207 /* If the sink supports it, try to set the power state appropriately */
1208 static void intel_dp_sink_dpms(struct intel_dp *intel_dp, int mode)
1212 /* Should have a valid DPCD by this point */
1213 if (intel_dp->dpcd[DP_DPCD_REV] < 0x11)
1216 if (mode != DRM_MODE_DPMS_ON) {
1217 ret = intel_dp_aux_native_write_1(intel_dp, DP_SET_POWER,
1220 DRM_DEBUG_DRIVER("failed to write sink power state\n");
1223 * When turning on, we need to retry for 1ms to give the sink
1226 for (i = 0; i < 3; i++) {
1227 ret = intel_dp_aux_native_write_1(intel_dp,
1237 static void intel_dp_prepare(struct drm_encoder *encoder)
1239 struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
1241 ironlake_edp_backlight_off(intel_dp);
1242 ironlake_edp_panel_off(intel_dp);
1244 /* Wake up the sink first */
1245 ironlake_edp_panel_vdd_on(intel_dp);
1246 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
1247 intel_dp_link_down(intel_dp);
1248 ironlake_edp_panel_vdd_off(intel_dp, false);
1250 /* Make sure the panel is off before trying to
1255 static void intel_dp_commit(struct drm_encoder *encoder)
1257 struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
1258 struct drm_device *dev = encoder->dev;
1259 struct intel_crtc *intel_crtc = to_intel_crtc(intel_dp->base.base.crtc);
1261 ironlake_edp_panel_vdd_on(intel_dp);
1262 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
1263 intel_dp_start_link_train(intel_dp);
1264 ironlake_edp_panel_on(intel_dp);
1265 ironlake_edp_panel_vdd_off(intel_dp, true);
1266 intel_dp_complete_link_train(intel_dp);
1267 ironlake_edp_backlight_on(intel_dp);
1269 intel_dp->dpms_mode = DRM_MODE_DPMS_ON;
1271 if (HAS_PCH_CPT(dev))
1272 intel_cpt_verify_modeset(dev, intel_crtc->pipe);
1276 intel_dp_dpms(struct drm_encoder *encoder, int mode)
1278 struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
1279 struct drm_device *dev = encoder->dev;
1280 struct drm_i915_private *dev_priv = dev->dev_private;
1281 uint32_t dp_reg = I915_READ(intel_dp->output_reg);
1283 if (mode != DRM_MODE_DPMS_ON) {
1284 ironlake_edp_backlight_off(intel_dp);
1285 ironlake_edp_panel_off(intel_dp);
1287 ironlake_edp_panel_vdd_on(intel_dp);
1288 intel_dp_sink_dpms(intel_dp, mode);
1289 intel_dp_link_down(intel_dp);
1290 ironlake_edp_panel_vdd_off(intel_dp, false);
1292 if (is_cpu_edp(intel_dp))
1293 ironlake_edp_pll_off(encoder);
1295 if (is_cpu_edp(intel_dp))
1296 ironlake_edp_pll_on(encoder);
1298 ironlake_edp_panel_vdd_on(intel_dp);
1299 intel_dp_sink_dpms(intel_dp, mode);
1300 if (!(dp_reg & DP_PORT_EN)) {
1301 intel_dp_start_link_train(intel_dp);
1302 ironlake_edp_panel_on(intel_dp);
1303 ironlake_edp_panel_vdd_off(intel_dp, true);
1304 intel_dp_complete_link_train(intel_dp);
1306 ironlake_edp_panel_vdd_off(intel_dp, false);
1307 ironlake_edp_backlight_on(intel_dp);
1309 intel_dp->dpms_mode = mode;
1313 * Native read with retry for link status and receiver capability reads for
1314 * cases where the sink may still be asleep.
1317 intel_dp_aux_native_read_retry(struct intel_dp *intel_dp, uint16_t address,
1318 uint8_t *recv, int recv_bytes)
1323 * Sinks are *supposed* to come up within 1ms from an off state,
1324 * but we're also supposed to retry 3 times per the spec.
1326 for (i = 0; i < 3; i++) {
1327 ret = intel_dp_aux_native_read(intel_dp, address, recv,
1329 if (ret == recv_bytes)
1338 * Fetch AUX CH registers 0x202 - 0x207 which contain
1339 * link status information
1342 intel_dp_get_link_status(struct intel_dp *intel_dp, uint8_t link_status[DP_LINK_STATUS_SIZE])
1344 return intel_dp_aux_native_read_retry(intel_dp,
1347 DP_LINK_STATUS_SIZE);
1351 intel_dp_link_status(uint8_t link_status[DP_LINK_STATUS_SIZE],
1354 return link_status[r - DP_LANE0_1_STATUS];
1358 intel_get_adjust_request_voltage(uint8_t adjust_request[2],
1361 int s = ((lane & 1) ?
1362 DP_ADJUST_VOLTAGE_SWING_LANE1_SHIFT :
1363 DP_ADJUST_VOLTAGE_SWING_LANE0_SHIFT);
1364 uint8_t l = adjust_request[lane>>1];
1366 return ((l >> s) & 3) << DP_TRAIN_VOLTAGE_SWING_SHIFT;
1370 intel_get_adjust_request_pre_emphasis(uint8_t adjust_request[2],
1373 int s = ((lane & 1) ?
1374 DP_ADJUST_PRE_EMPHASIS_LANE1_SHIFT :
1375 DP_ADJUST_PRE_EMPHASIS_LANE0_SHIFT);
1376 uint8_t l = adjust_request[lane>>1];
1378 return ((l >> s) & 3) << DP_TRAIN_PRE_EMPHASIS_SHIFT;
1383 static char *voltage_names[] = {
1384 "0.4V", "0.6V", "0.8V", "1.2V"
1386 static char *pre_emph_names[] = {
1387 "0dB", "3.5dB", "6dB", "9.5dB"
1389 static char *link_train_names[] = {
1390 "pattern 1", "pattern 2", "idle", "off"
1395 * These are source-specific values; current Intel hardware supports
1396 * a maximum voltage of 800mV and a maximum pre-emphasis of 6dB
1400 intel_dp_voltage_max(struct intel_dp *intel_dp)
1402 struct drm_device *dev = intel_dp->base.base.dev;
1404 if (IS_GEN7(dev) && is_cpu_edp(intel_dp))
1405 return DP_TRAIN_VOLTAGE_SWING_800;
1406 else if (HAS_PCH_CPT(dev) && !is_cpu_edp(intel_dp))
1407 return DP_TRAIN_VOLTAGE_SWING_1200;
1409 return DP_TRAIN_VOLTAGE_SWING_800;
1413 intel_dp_pre_emphasis_max(struct intel_dp *intel_dp, uint8_t voltage_swing)
1415 struct drm_device *dev = intel_dp->base.base.dev;
1417 if (IS_GEN7(dev) && is_cpu_edp(intel_dp)) {
1418 switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) {
1419 case DP_TRAIN_VOLTAGE_SWING_400:
1420 return DP_TRAIN_PRE_EMPHASIS_6;
1421 case DP_TRAIN_VOLTAGE_SWING_600:
1422 case DP_TRAIN_VOLTAGE_SWING_800:
1423 return DP_TRAIN_PRE_EMPHASIS_3_5;
1425 return DP_TRAIN_PRE_EMPHASIS_0;
1428 switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) {
1429 case DP_TRAIN_VOLTAGE_SWING_400:
1430 return DP_TRAIN_PRE_EMPHASIS_6;
1431 case DP_TRAIN_VOLTAGE_SWING_600:
1432 return DP_TRAIN_PRE_EMPHASIS_6;
1433 case DP_TRAIN_VOLTAGE_SWING_800:
1434 return DP_TRAIN_PRE_EMPHASIS_3_5;
1435 case DP_TRAIN_VOLTAGE_SWING_1200:
1437 return DP_TRAIN_PRE_EMPHASIS_0;
1443 intel_get_adjust_train(struct intel_dp *intel_dp, uint8_t link_status[DP_LINK_STATUS_SIZE])
1448 uint8_t *adjust_request = link_status + (DP_ADJUST_REQUEST_LANE0_1 - DP_LANE0_1_STATUS);
1449 uint8_t voltage_max;
1450 uint8_t preemph_max;
1452 for (lane = 0; lane < intel_dp->lane_count; lane++) {
1453 uint8_t this_v = intel_get_adjust_request_voltage(adjust_request, lane);
1454 uint8_t this_p = intel_get_adjust_request_pre_emphasis(adjust_request, lane);
1462 voltage_max = intel_dp_voltage_max(intel_dp);
1463 if (v >= voltage_max)
1464 v = voltage_max | DP_TRAIN_MAX_SWING_REACHED;
1466 preemph_max = intel_dp_pre_emphasis_max(intel_dp, v);
1467 if (p >= preemph_max)
1468 p = preemph_max | DP_TRAIN_MAX_PRE_EMPHASIS_REACHED;
1470 for (lane = 0; lane < 4; lane++)
1471 intel_dp->train_set[lane] = v | p;
1475 intel_dp_signal_levels(uint8_t train_set)
1477 uint32_t signal_levels = 0;
1479 switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
1480 case DP_TRAIN_VOLTAGE_SWING_400:
1482 signal_levels |= DP_VOLTAGE_0_4;
1484 case DP_TRAIN_VOLTAGE_SWING_600:
1485 signal_levels |= DP_VOLTAGE_0_6;
1487 case DP_TRAIN_VOLTAGE_SWING_800:
1488 signal_levels |= DP_VOLTAGE_0_8;
1490 case DP_TRAIN_VOLTAGE_SWING_1200:
1491 signal_levels |= DP_VOLTAGE_1_2;
1494 switch (train_set & DP_TRAIN_PRE_EMPHASIS_MASK) {
1495 case DP_TRAIN_PRE_EMPHASIS_0:
1497 signal_levels |= DP_PRE_EMPHASIS_0;
1499 case DP_TRAIN_PRE_EMPHASIS_3_5:
1500 signal_levels |= DP_PRE_EMPHASIS_3_5;
1502 case DP_TRAIN_PRE_EMPHASIS_6:
1503 signal_levels |= DP_PRE_EMPHASIS_6;
1505 case DP_TRAIN_PRE_EMPHASIS_9_5:
1506 signal_levels |= DP_PRE_EMPHASIS_9_5;
1509 return signal_levels;
1512 /* Gen6's DP voltage swing and pre-emphasis control */
1514 intel_gen6_edp_signal_levels(uint8_t train_set)
1516 int signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK |
1517 DP_TRAIN_PRE_EMPHASIS_MASK);
1518 switch (signal_levels) {
1519 case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_0:
1520 case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_0:
1521 return EDP_LINK_TRAIN_400_600MV_0DB_SNB_B;
1522 case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_3_5:
1523 return EDP_LINK_TRAIN_400MV_3_5DB_SNB_B;
1524 case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_6:
1525 case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_6:
1526 return EDP_LINK_TRAIN_400_600MV_6DB_SNB_B;
1527 case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_3_5:
1528 case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_3_5:
1529 return EDP_LINK_TRAIN_600_800MV_3_5DB_SNB_B;
1530 case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_0:
1531 case DP_TRAIN_VOLTAGE_SWING_1200 | DP_TRAIN_PRE_EMPHASIS_0:
1532 return EDP_LINK_TRAIN_800_1200MV_0DB_SNB_B;
1534 DRM_DEBUG_KMS("Unsupported voltage swing/pre-emphasis level:"
1535 "0x%x\n", signal_levels);
1536 return EDP_LINK_TRAIN_400_600MV_0DB_SNB_B;
1540 /* Gen7's DP voltage swing and pre-emphasis control */
1542 intel_gen7_edp_signal_levels(uint8_t train_set)
1544 int signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK |
1545 DP_TRAIN_PRE_EMPHASIS_MASK);
1546 switch (signal_levels) {
1547 case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_0:
1548 return EDP_LINK_TRAIN_400MV_0DB_IVB;
1549 case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_3_5:
1550 return EDP_LINK_TRAIN_400MV_3_5DB_IVB;
1551 case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_6:
1552 return EDP_LINK_TRAIN_400MV_6DB_IVB;
1554 case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_0:
1555 return EDP_LINK_TRAIN_600MV_0DB_IVB;
1556 case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_3_5:
1557 return EDP_LINK_TRAIN_600MV_3_5DB_IVB;
1559 case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_0:
1560 return EDP_LINK_TRAIN_800MV_0DB_IVB;
1561 case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_3_5:
1562 return EDP_LINK_TRAIN_800MV_3_5DB_IVB;
1565 DRM_DEBUG_KMS("Unsupported voltage swing/pre-emphasis level:"
1566 "0x%x\n", signal_levels);
1567 return EDP_LINK_TRAIN_500MV_0DB_IVB;
1572 intel_get_lane_status(uint8_t link_status[DP_LINK_STATUS_SIZE],
1575 int s = (lane & 1) * 4;
1576 uint8_t l = link_status[lane>>1];
1578 return (l >> s) & 0xf;
1581 /* Check for clock recovery is done on all channels */
1583 intel_clock_recovery_ok(uint8_t link_status[DP_LINK_STATUS_SIZE], int lane_count)
1586 uint8_t lane_status;
1588 for (lane = 0; lane < lane_count; lane++) {
1589 lane_status = intel_get_lane_status(link_status, lane);
1590 if ((lane_status & DP_LANE_CR_DONE) == 0)
1596 /* Check to see if channel eq is done on all channels */
1597 #define CHANNEL_EQ_BITS (DP_LANE_CR_DONE|\
1598 DP_LANE_CHANNEL_EQ_DONE|\
1599 DP_LANE_SYMBOL_LOCKED)
1601 intel_channel_eq_ok(struct intel_dp *intel_dp, uint8_t link_status[DP_LINK_STATUS_SIZE])
1604 uint8_t lane_status;
1607 lane_align = intel_dp_link_status(link_status,
1608 DP_LANE_ALIGN_STATUS_UPDATED);
1609 if ((lane_align & DP_INTERLANE_ALIGN_DONE) == 0)
1611 for (lane = 0; lane < intel_dp->lane_count; lane++) {
1612 lane_status = intel_get_lane_status(link_status, lane);
1613 if ((lane_status & CHANNEL_EQ_BITS) != CHANNEL_EQ_BITS)
1620 intel_dp_set_link_train(struct intel_dp *intel_dp,
1621 uint32_t dp_reg_value,
1622 uint8_t dp_train_pat)
1624 struct drm_device *dev = intel_dp->base.base.dev;
1625 struct drm_i915_private *dev_priv = dev->dev_private;
1628 I915_WRITE(intel_dp->output_reg, dp_reg_value);
1629 POSTING_READ(intel_dp->output_reg);
1631 intel_dp_aux_native_write_1(intel_dp,
1632 DP_TRAINING_PATTERN_SET,
1635 ret = intel_dp_aux_native_write(intel_dp,
1636 DP_TRAINING_LANE0_SET,
1637 intel_dp->train_set,
1638 intel_dp->lane_count);
1639 if (ret != intel_dp->lane_count)
1645 /* Enable corresponding port and start training pattern 1 */
1647 intel_dp_start_link_train(struct intel_dp *intel_dp)
1649 struct drm_device *dev = intel_dp->base.base.dev;
1650 struct drm_i915_private *dev_priv = dev->dev_private;
1651 struct intel_crtc *intel_crtc = to_intel_crtc(intel_dp->base.base.crtc);
1654 bool clock_recovery = false;
1655 int voltage_tries, loop_tries;
1657 uint32_t DP = intel_dp->DP;
1660 * On CPT we have to enable the port in training pattern 1, which
1661 * will happen below in intel_dp_set_link_train. Otherwise, enable
1662 * the port and wait for it to become active.
1664 if (!HAS_PCH_CPT(dev)) {
1665 I915_WRITE(intel_dp->output_reg, intel_dp->DP);
1666 POSTING_READ(intel_dp->output_reg);
1667 intel_wait_for_vblank(dev, intel_crtc->pipe);
1670 /* Write the link configuration data */
1671 intel_dp_aux_native_write(intel_dp, DP_LINK_BW_SET,
1672 intel_dp->link_configuration,
1673 DP_LINK_CONFIGURATION_SIZE);
1677 if (HAS_PCH_CPT(dev) && (IS_GEN7(dev) || !is_cpu_edp(intel_dp)))
1678 DP &= ~DP_LINK_TRAIN_MASK_CPT;
1680 DP &= ~DP_LINK_TRAIN_MASK;
1681 memset(intel_dp->train_set, 0, 4);
1685 clock_recovery = false;
1687 /* Use intel_dp->train_set[0] to set the voltage and pre emphasis values */
1688 uint8_t link_status[DP_LINK_STATUS_SIZE];
1689 uint32_t signal_levels;
1692 if (IS_GEN7(dev) && is_cpu_edp(intel_dp)) {
1693 signal_levels = intel_gen7_edp_signal_levels(intel_dp->train_set[0]);
1694 DP = (DP & ~EDP_LINK_TRAIN_VOL_EMP_MASK_IVB) | signal_levels;
1695 } else if (IS_GEN6(dev) && is_cpu_edp(intel_dp)) {
1696 signal_levels = intel_gen6_edp_signal_levels(intel_dp->train_set[0]);
1697 DP = (DP & ~EDP_LINK_TRAIN_VOL_EMP_MASK_SNB) | signal_levels;
1699 signal_levels = intel_dp_signal_levels(intel_dp->train_set[0]);
1700 DRM_DEBUG_KMS("training pattern 1 signal levels %08x\n", signal_levels);
1701 DP = (DP & ~(DP_VOLTAGE_MASK|DP_PRE_EMPHASIS_MASK)) | signal_levels;
1704 if (HAS_PCH_CPT(dev) && (IS_GEN7(dev) || !is_cpu_edp(intel_dp)))
1705 reg = DP | DP_LINK_TRAIN_PAT_1_CPT;
1707 reg = DP | DP_LINK_TRAIN_PAT_1;
1709 if (!intel_dp_set_link_train(intel_dp, reg,
1710 DP_TRAINING_PATTERN_1 |
1711 DP_LINK_SCRAMBLING_DISABLE))
1713 /* Set training pattern 1 */
1716 if (!intel_dp_get_link_status(intel_dp, link_status)) {
1717 DRM_ERROR("failed to get link status\n");
1721 if (intel_clock_recovery_ok(link_status, intel_dp->lane_count)) {
1722 DRM_DEBUG_KMS("clock recovery OK\n");
1723 clock_recovery = true;
1727 /* Check to see if we've tried the max voltage */
1728 for (i = 0; i < intel_dp->lane_count; i++)
1729 if ((intel_dp->train_set[i] & DP_TRAIN_MAX_SWING_REACHED) == 0)
1731 if (i == intel_dp->lane_count) {
1733 if (loop_tries == 5) {
1734 DRM_DEBUG_KMS("too many full retries, give up\n");
1737 memset(intel_dp->train_set, 0, 4);
1742 /* Check to see if we've tried the same voltage 5 times */
1743 if ((intel_dp->train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK) == voltage) {
1745 if (voltage_tries == 5) {
1746 DRM_DEBUG_KMS("too many voltage retries, give up\n");
1751 voltage = intel_dp->train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK;
1753 /* Compute new intel_dp->train_set as requested by target */
1754 intel_get_adjust_train(intel_dp, link_status);
1761 intel_dp_complete_link_train(struct intel_dp *intel_dp)
1763 struct drm_device *dev = intel_dp->base.base.dev;
1764 struct drm_i915_private *dev_priv = dev->dev_private;
1765 bool channel_eq = false;
1766 int tries, cr_tries;
1768 uint32_t DP = intel_dp->DP;
1770 /* channel equalization */
1775 /* Use intel_dp->train_set[0] to set the voltage and pre emphasis values */
1776 uint32_t signal_levels;
1777 uint8_t link_status[DP_LINK_STATUS_SIZE];
1780 DRM_ERROR("failed to train DP, aborting\n");
1781 intel_dp_link_down(intel_dp);
1785 if (IS_GEN7(dev) && is_cpu_edp(intel_dp)) {
1786 signal_levels = intel_gen7_edp_signal_levels(intel_dp->train_set[0]);
1787 DP = (DP & ~EDP_LINK_TRAIN_VOL_EMP_MASK_IVB) | signal_levels;
1788 } else if (IS_GEN6(dev) && is_cpu_edp(intel_dp)) {
1789 signal_levels = intel_gen6_edp_signal_levels(intel_dp->train_set[0]);
1790 DP = (DP & ~EDP_LINK_TRAIN_VOL_EMP_MASK_SNB) | signal_levels;
1792 signal_levels = intel_dp_signal_levels(intel_dp->train_set[0]);
1793 DP = (DP & ~(DP_VOLTAGE_MASK|DP_PRE_EMPHASIS_MASK)) | signal_levels;
1796 if (HAS_PCH_CPT(dev) && (IS_GEN7(dev) || !is_cpu_edp(intel_dp)))
1797 reg = DP | DP_LINK_TRAIN_PAT_2_CPT;
1799 reg = DP | DP_LINK_TRAIN_PAT_2;
1801 /* channel eq pattern */
1802 if (!intel_dp_set_link_train(intel_dp, reg,
1803 DP_TRAINING_PATTERN_2 |
1804 DP_LINK_SCRAMBLING_DISABLE))
1808 if (!intel_dp_get_link_status(intel_dp, link_status))
1811 /* Make sure clock is still ok */
1812 if (!intel_clock_recovery_ok(link_status, intel_dp->lane_count)) {
1813 intel_dp_start_link_train(intel_dp);
1818 if (intel_channel_eq_ok(intel_dp, link_status)) {
1823 /* Try 5 times, then try clock recovery if that fails */
1825 intel_dp_link_down(intel_dp);
1826 intel_dp_start_link_train(intel_dp);
1832 /* Compute new intel_dp->train_set as requested by target */
1833 intel_get_adjust_train(intel_dp, link_status);
1837 if (HAS_PCH_CPT(dev) && (IS_GEN7(dev) || !is_cpu_edp(intel_dp)))
1838 reg = DP | DP_LINK_TRAIN_OFF_CPT;
1840 reg = DP | DP_LINK_TRAIN_OFF;
1842 I915_WRITE(intel_dp->output_reg, reg);
1843 POSTING_READ(intel_dp->output_reg);
1844 intel_dp_aux_native_write_1(intel_dp,
1845 DP_TRAINING_PATTERN_SET, DP_TRAINING_PATTERN_DISABLE);
1849 intel_dp_link_down(struct intel_dp *intel_dp)
1851 struct drm_device *dev = intel_dp->base.base.dev;
1852 struct drm_i915_private *dev_priv = dev->dev_private;
1853 uint32_t DP = intel_dp->DP;
1855 if ((I915_READ(intel_dp->output_reg) & DP_PORT_EN) == 0)
1858 DRM_DEBUG_KMS("\n");
1860 if (is_edp(intel_dp)) {
1861 DP &= ~DP_PLL_ENABLE;
1862 I915_WRITE(intel_dp->output_reg, DP);
1863 POSTING_READ(intel_dp->output_reg);
1867 if (HAS_PCH_CPT(dev) && (IS_GEN7(dev) || !is_cpu_edp(intel_dp))) {
1868 DP &= ~DP_LINK_TRAIN_MASK_CPT;
1869 I915_WRITE(intel_dp->output_reg, DP | DP_LINK_TRAIN_PAT_IDLE_CPT);
1871 DP &= ~DP_LINK_TRAIN_MASK;
1872 I915_WRITE(intel_dp->output_reg, DP | DP_LINK_TRAIN_PAT_IDLE);
1874 POSTING_READ(intel_dp->output_reg);
1878 if (is_edp(intel_dp)) {
1879 if (HAS_PCH_CPT(dev) && (IS_GEN7(dev) || !is_cpu_edp(intel_dp)))
1880 DP |= DP_LINK_TRAIN_OFF_CPT;
1882 DP |= DP_LINK_TRAIN_OFF;
1885 if (!HAS_PCH_CPT(dev) &&
1886 I915_READ(intel_dp->output_reg) & DP_PIPEB_SELECT) {
1887 struct drm_crtc *crtc = intel_dp->base.base.crtc;
1889 /* Hardware workaround: leaving our transcoder select
1890 * set to transcoder B while it's off will prevent the
1891 * corresponding HDMI output on transcoder A.
1893 * Combine this with another hardware workaround:
1894 * transcoder select bit can only be cleared while the
1897 DP &= ~DP_PIPEB_SELECT;
1898 I915_WRITE(intel_dp->output_reg, DP);
1900 /* Changes to enable or select take place the vblank
1901 * after being written.
1904 /* We can arrive here never having been attached
1905 * to a CRTC, for instance, due to inheriting
1906 * random state from the BIOS.
1908 * If the pipe is not running, play safe and
1909 * wait for the clocks to stabilise before
1912 POSTING_READ(intel_dp->output_reg);
1915 intel_wait_for_vblank(dev, to_intel_crtc(crtc)->pipe);
1918 DP &= ~DP_AUDIO_OUTPUT_ENABLE;
1919 I915_WRITE(intel_dp->output_reg, DP & ~DP_PORT_EN);
1920 POSTING_READ(intel_dp->output_reg);
1921 msleep(intel_dp->panel_power_down_delay);
1925 intel_dp_get_dpcd(struct intel_dp *intel_dp)
1927 if (intel_dp_aux_native_read_retry(intel_dp, 0x000, intel_dp->dpcd,
1928 sizeof(intel_dp->dpcd)) &&
1929 (intel_dp->dpcd[DP_DPCD_REV] != 0)) {
1937 intel_dp_get_sink_irq(struct intel_dp *intel_dp, u8 *sink_irq_vector)
1941 ret = intel_dp_aux_native_read_retry(intel_dp,
1942 DP_DEVICE_SERVICE_IRQ_VECTOR,
1943 sink_irq_vector, 1);
1951 intel_dp_handle_test_request(struct intel_dp *intel_dp)
1953 /* NAK by default */
1954 intel_dp_aux_native_write_1(intel_dp, DP_TEST_RESPONSE, DP_TEST_ACK);
1958 * According to DP spec
1961 * 2. Configure link according to Receiver Capabilities
1962 * 3. Use Link Training from 2.5.3.3 and 3.5.1.3
1963 * 4. Check link status on receipt of hot-plug interrupt
1967 intel_dp_check_link_status(struct intel_dp *intel_dp)
1970 u8 link_status[DP_LINK_STATUS_SIZE];
1972 if (intel_dp->dpms_mode != DRM_MODE_DPMS_ON)
1975 if (!intel_dp->base.base.crtc)
1978 /* Try to read receiver status if the link appears to be up */
1979 if (!intel_dp_get_link_status(intel_dp, link_status)) {
1980 intel_dp_link_down(intel_dp);
1984 /* Now read the DPCD to see if it's actually running */
1985 if (!intel_dp_get_dpcd(intel_dp)) {
1986 intel_dp_link_down(intel_dp);
1990 /* Try to read the source of the interrupt */
1991 if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11 &&
1992 intel_dp_get_sink_irq(intel_dp, &sink_irq_vector)) {
1993 /* Clear interrupt source */
1994 intel_dp_aux_native_write_1(intel_dp,
1995 DP_DEVICE_SERVICE_IRQ_VECTOR,
1998 if (sink_irq_vector & DP_AUTOMATED_TEST_REQUEST)
1999 intel_dp_handle_test_request(intel_dp);
2000 if (sink_irq_vector & (DP_CP_IRQ | DP_SINK_SPECIFIC_IRQ))
2001 DRM_DEBUG_DRIVER("CP or sink specific irq unhandled\n");
2004 if (!intel_channel_eq_ok(intel_dp, link_status)) {
2005 DRM_DEBUG_KMS("%s: channel EQ not ok, retraining\n",
2006 drm_get_encoder_name(&intel_dp->base.base));
2007 intel_dp_start_link_train(intel_dp);
2008 intel_dp_complete_link_train(intel_dp);
2012 static enum drm_connector_status
2013 intel_dp_detect_dpcd(struct intel_dp *intel_dp)
2015 if (intel_dp_get_dpcd(intel_dp))
2016 return connector_status_connected;
2017 return connector_status_disconnected;
2020 static enum drm_connector_status
2021 ironlake_dp_detect(struct intel_dp *intel_dp)
2023 enum drm_connector_status status;
2025 /* Can't disconnect eDP, but you can close the lid... */
2026 if (is_edp(intel_dp)) {
2027 status = intel_panel_detect(intel_dp->base.base.dev);
2028 if (status == connector_status_unknown)
2029 status = connector_status_connected;
2033 return intel_dp_detect_dpcd(intel_dp);
2036 static enum drm_connector_status
2037 g4x_dp_detect(struct intel_dp *intel_dp)
2039 struct drm_device *dev = intel_dp->base.base.dev;
2040 struct drm_i915_private *dev_priv = dev->dev_private;
2043 switch (intel_dp->output_reg) {
2045 bit = DPB_HOTPLUG_INT_STATUS;
2048 bit = DPC_HOTPLUG_INT_STATUS;
2051 bit = DPD_HOTPLUG_INT_STATUS;
2054 return connector_status_unknown;
2057 temp = I915_READ(PORT_HOTPLUG_STAT);
2059 if ((temp & bit) == 0)
2060 return connector_status_disconnected;
2062 return intel_dp_detect_dpcd(intel_dp);
2065 static struct edid *
2066 intel_dp_get_edid(struct drm_connector *connector, struct i2c_adapter *adapter)
2068 struct intel_dp *intel_dp = intel_attached_dp(connector);
2071 ironlake_edp_panel_vdd_on(intel_dp);
2072 edid = drm_get_edid(connector, adapter);
2073 ironlake_edp_panel_vdd_off(intel_dp, false);
2078 intel_dp_get_edid_modes(struct drm_connector *connector, struct i2c_adapter *adapter)
2080 struct intel_dp *intel_dp = intel_attached_dp(connector);
2083 ironlake_edp_panel_vdd_on(intel_dp);
2084 ret = intel_ddc_get_modes(connector, adapter);
2085 ironlake_edp_panel_vdd_off(intel_dp, false);
2091 * Uses CRT_HOTPLUG_EN and CRT_HOTPLUG_STAT to detect DP connection.
2093 * \return true if DP port is connected.
2094 * \return false if DP port is disconnected.
2096 static enum drm_connector_status
2097 intel_dp_detect(struct drm_connector *connector, bool force)
2099 struct intel_dp *intel_dp = intel_attached_dp(connector);
2100 struct drm_device *dev = intel_dp->base.base.dev;
2101 enum drm_connector_status status;
2102 struct edid *edid = NULL;
2104 intel_dp->has_audio = false;
2106 if (HAS_PCH_SPLIT(dev))
2107 status = ironlake_dp_detect(intel_dp);
2109 status = g4x_dp_detect(intel_dp);
2111 DRM_DEBUG_KMS("DPCD: %02hx%02hx%02hx%02hx%02hx%02hx%02hx%02hx\n",
2112 intel_dp->dpcd[0], intel_dp->dpcd[1], intel_dp->dpcd[2],
2113 intel_dp->dpcd[3], intel_dp->dpcd[4], intel_dp->dpcd[5],
2114 intel_dp->dpcd[6], intel_dp->dpcd[7]);
2116 if (status != connector_status_connected)
2119 if (intel_dp->force_audio != HDMI_AUDIO_AUTO) {
2120 intel_dp->has_audio = (intel_dp->force_audio == HDMI_AUDIO_ON);
2122 edid = intel_dp_get_edid(connector, &intel_dp->adapter);
2124 intel_dp->has_audio = drm_detect_monitor_audio(edid);
2125 connector->display_info.raw_edid = NULL;
2130 return connector_status_connected;
2133 static int intel_dp_get_modes(struct drm_connector *connector)
2135 struct intel_dp *intel_dp = intel_attached_dp(connector);
2136 struct drm_device *dev = intel_dp->base.base.dev;
2137 struct drm_i915_private *dev_priv = dev->dev_private;
2140 /* We should parse the EDID data and find out if it has an audio sink
2143 ret = intel_dp_get_edid_modes(connector, &intel_dp->adapter);
2145 if (is_edp(intel_dp) && !intel_dp->panel_fixed_mode) {
2146 struct drm_display_mode *newmode;
2147 list_for_each_entry(newmode, &connector->probed_modes,
2149 if ((newmode->type & DRM_MODE_TYPE_PREFERRED)) {
2150 intel_dp->panel_fixed_mode =
2151 drm_mode_duplicate(dev, newmode);
2159 /* if eDP has no EDID, try to use fixed panel mode from VBT */
2160 if (is_edp(intel_dp)) {
2161 /* initialize panel mode from VBT if available for eDP */
2162 if (intel_dp->panel_fixed_mode == NULL && dev_priv->lfp_lvds_vbt_mode != NULL) {
2163 intel_dp->panel_fixed_mode =
2164 drm_mode_duplicate(dev, dev_priv->lfp_lvds_vbt_mode);
2165 if (intel_dp->panel_fixed_mode) {
2166 intel_dp->panel_fixed_mode->type |=
2167 DRM_MODE_TYPE_PREFERRED;
2170 if (intel_dp->panel_fixed_mode) {
2171 struct drm_display_mode *mode;
2172 mode = drm_mode_duplicate(dev, intel_dp->panel_fixed_mode);
2173 drm_mode_probed_add(connector, mode);
2181 intel_dp_detect_audio(struct drm_connector *connector)
2183 struct intel_dp *intel_dp = intel_attached_dp(connector);
2185 bool has_audio = false;
2187 edid = intel_dp_get_edid(connector, &intel_dp->adapter);
2189 has_audio = drm_detect_monitor_audio(edid);
2191 connector->display_info.raw_edid = NULL;
2199 intel_dp_set_property(struct drm_connector *connector,
2200 struct drm_property *property,
2203 struct drm_i915_private *dev_priv = connector->dev->dev_private;
2204 struct intel_dp *intel_dp = intel_attached_dp(connector);
2207 ret = drm_connector_property_set_value(connector, property, val);
2211 if (property == dev_priv->force_audio_property) {
2215 if (i == intel_dp->force_audio)
2218 intel_dp->force_audio = i;
2220 if (i == HDMI_AUDIO_AUTO)
2221 has_audio = intel_dp_detect_audio(connector);
2223 has_audio = (i == HDMI_AUDIO_ON);
2225 if (has_audio == intel_dp->has_audio)
2228 intel_dp->has_audio = has_audio;
2232 if (property == dev_priv->broadcast_rgb_property) {
2233 if (val == !!intel_dp->color_range)
2236 intel_dp->color_range = val ? DP_COLOR_RANGE_16_235 : 0;
2243 if (intel_dp->base.base.crtc) {
2244 struct drm_crtc *crtc = intel_dp->base.base.crtc;
2245 drm_crtc_helper_set_mode(crtc, &crtc->mode,
2254 intel_dp_destroy(struct drm_connector *connector)
2256 struct drm_device *dev = connector->dev;
2258 if (intel_dpd_is_edp(dev))
2259 intel_panel_destroy_backlight(dev);
2261 drm_sysfs_connector_remove(connector);
2262 drm_connector_cleanup(connector);
2266 static void intel_dp_encoder_destroy(struct drm_encoder *encoder)
2268 struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
2270 i2c_del_adapter(&intel_dp->adapter);
2271 drm_encoder_cleanup(encoder);
2272 if (is_edp(intel_dp)) {
2273 cancel_delayed_work_sync(&intel_dp->panel_vdd_work);
2274 ironlake_panel_vdd_off_sync(intel_dp);
2279 static const struct drm_encoder_helper_funcs intel_dp_helper_funcs = {
2280 .dpms = intel_dp_dpms,
2281 .mode_fixup = intel_dp_mode_fixup,
2282 .prepare = intel_dp_prepare,
2283 .mode_set = intel_dp_mode_set,
2284 .commit = intel_dp_commit,
2287 static const struct drm_connector_funcs intel_dp_connector_funcs = {
2288 .dpms = drm_helper_connector_dpms,
2289 .detect = intel_dp_detect,
2290 .fill_modes = drm_helper_probe_single_connector_modes,
2291 .set_property = intel_dp_set_property,
2292 .destroy = intel_dp_destroy,
2295 static const struct drm_connector_helper_funcs intel_dp_connector_helper_funcs = {
2296 .get_modes = intel_dp_get_modes,
2297 .mode_valid = intel_dp_mode_valid,
2298 .best_encoder = intel_best_encoder,
2301 static const struct drm_encoder_funcs intel_dp_enc_funcs = {
2302 .destroy = intel_dp_encoder_destroy,
2306 intel_dp_hot_plug(struct intel_encoder *intel_encoder)
2308 struct intel_dp *intel_dp = container_of(intel_encoder, struct intel_dp, base);
2310 intel_dp_check_link_status(intel_dp);
2313 /* Return which DP Port should be selected for Transcoder DP control */
2315 intel_trans_dp_port_sel(struct drm_crtc *crtc)
2317 struct drm_device *dev = crtc->dev;
2318 struct drm_mode_config *mode_config = &dev->mode_config;
2319 struct drm_encoder *encoder;
2321 list_for_each_entry(encoder, &mode_config->encoder_list, head) {
2322 struct intel_dp *intel_dp;
2324 if (encoder->crtc != crtc)
2327 intel_dp = enc_to_intel_dp(encoder);
2328 if (intel_dp->base.type == INTEL_OUTPUT_DISPLAYPORT ||
2329 intel_dp->base.type == INTEL_OUTPUT_EDP)
2330 return intel_dp->output_reg;
2336 /* check the VBT to see whether the eDP is on DP-D port */
2337 bool intel_dpd_is_edp(struct drm_device *dev)
2339 struct drm_i915_private *dev_priv = dev->dev_private;
2340 struct child_device_config *p_child;
2343 if (!dev_priv->child_dev_num)
2346 for (i = 0; i < dev_priv->child_dev_num; i++) {
2347 p_child = dev_priv->child_dev + i;
2349 if (p_child->dvo_port == PORT_IDPD &&
2350 p_child->device_type == DEVICE_TYPE_eDP)
2357 intel_dp_add_properties(struct intel_dp *intel_dp, struct drm_connector *connector)
2359 intel_attach_force_audio_property(connector);
2360 intel_attach_broadcast_rgb_property(connector);
2364 intel_dp_init(struct drm_device *dev, int output_reg)
2366 struct drm_i915_private *dev_priv = dev->dev_private;
2367 struct drm_connector *connector;
2368 struct intel_dp *intel_dp;
2369 struct intel_encoder *intel_encoder;
2370 struct intel_connector *intel_connector;
2371 const char *name = NULL;
2374 intel_dp = kzalloc(sizeof(struct intel_dp), GFP_KERNEL);
2378 intel_dp->output_reg = output_reg;
2379 intel_dp->dpms_mode = -1;
2381 intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL);
2382 if (!intel_connector) {
2386 intel_encoder = &intel_dp->base;
2388 if (HAS_PCH_SPLIT(dev) && output_reg == PCH_DP_D)
2389 if (intel_dpd_is_edp(dev))
2390 intel_dp->is_pch_edp = true;
2392 if (output_reg == DP_A || is_pch_edp(intel_dp)) {
2393 type = DRM_MODE_CONNECTOR_eDP;
2394 intel_encoder->type = INTEL_OUTPUT_EDP;
2396 type = DRM_MODE_CONNECTOR_DisplayPort;
2397 intel_encoder->type = INTEL_OUTPUT_DISPLAYPORT;
2400 connector = &intel_connector->base;
2401 drm_connector_init(dev, connector, &intel_dp_connector_funcs, type);
2402 drm_connector_helper_add(connector, &intel_dp_connector_helper_funcs);
2404 connector->polled = DRM_CONNECTOR_POLL_HPD;
2406 if (output_reg == DP_B || output_reg == PCH_DP_B)
2407 intel_encoder->clone_mask = (1 << INTEL_DP_B_CLONE_BIT);
2408 else if (output_reg == DP_C || output_reg == PCH_DP_C)
2409 intel_encoder->clone_mask = (1 << INTEL_DP_C_CLONE_BIT);
2410 else if (output_reg == DP_D || output_reg == PCH_DP_D)
2411 intel_encoder->clone_mask = (1 << INTEL_DP_D_CLONE_BIT);
2413 if (is_edp(intel_dp)) {
2414 intel_encoder->clone_mask = (1 << INTEL_EDP_CLONE_BIT);
2415 INIT_DELAYED_WORK(&intel_dp->panel_vdd_work,
2416 ironlake_panel_vdd_work);
2419 intel_encoder->crtc_mask = (1 << 0) | (1 << 1) | (1 << 2);
2420 connector->interlace_allowed = true;
2421 connector->doublescan_allowed = 0;
2423 drm_encoder_init(dev, &intel_encoder->base, &intel_dp_enc_funcs,
2424 DRM_MODE_ENCODER_TMDS);
2425 drm_encoder_helper_add(&intel_encoder->base, &intel_dp_helper_funcs);
2427 intel_connector_attach_encoder(intel_connector, intel_encoder);
2428 drm_sysfs_connector_add(connector);
2430 /* Set up the DDC bus. */
2431 switch (output_reg) {
2437 dev_priv->hotplug_supported_mask |=
2438 HDMIB_HOTPLUG_INT_STATUS;
2443 dev_priv->hotplug_supported_mask |=
2444 HDMIC_HOTPLUG_INT_STATUS;
2449 dev_priv->hotplug_supported_mask |=
2450 HDMID_HOTPLUG_INT_STATUS;
2455 /* Cache some DPCD data in the eDP case */
2456 if (is_edp(intel_dp)) {
2458 struct edp_power_seq cur, vbt;
2459 u32 pp_on, pp_off, pp_div;
2461 pp_on = I915_READ(PCH_PP_ON_DELAYS);
2462 pp_off = I915_READ(PCH_PP_OFF_DELAYS);
2463 pp_div = I915_READ(PCH_PP_DIVISOR);
2465 if (!pp_on || !pp_off || !pp_div) {
2466 DRM_INFO("bad panel power sequencing delays, disabling panel\n");
2467 intel_dp_encoder_destroy(&intel_dp->base.base);
2468 intel_dp_destroy(&intel_connector->base);
2472 /* Pull timing values out of registers */
2473 cur.t1_t3 = (pp_on & PANEL_POWER_UP_DELAY_MASK) >>
2474 PANEL_POWER_UP_DELAY_SHIFT;
2476 cur.t8 = (pp_on & PANEL_LIGHT_ON_DELAY_MASK) >>
2477 PANEL_LIGHT_ON_DELAY_SHIFT;
2479 cur.t9 = (pp_off & PANEL_LIGHT_OFF_DELAY_MASK) >>
2480 PANEL_LIGHT_OFF_DELAY_SHIFT;
2482 cur.t10 = (pp_off & PANEL_POWER_DOWN_DELAY_MASK) >>
2483 PANEL_POWER_DOWN_DELAY_SHIFT;
2485 cur.t11_t12 = ((pp_div & PANEL_POWER_CYCLE_DELAY_MASK) >>
2486 PANEL_POWER_CYCLE_DELAY_SHIFT) * 1000;
2488 DRM_DEBUG_KMS("cur t1_t3 %d t8 %d t9 %d t10 %d t11_t12 %d\n",
2489 cur.t1_t3, cur.t8, cur.t9, cur.t10, cur.t11_t12);
2491 vbt = dev_priv->edp.pps;
2493 DRM_DEBUG_KMS("vbt t1_t3 %d t8 %d t9 %d t10 %d t11_t12 %d\n",
2494 vbt.t1_t3, vbt.t8, vbt.t9, vbt.t10, vbt.t11_t12);
2496 #define get_delay(field) ((max(cur.field, vbt.field) + 9) / 10)
2498 intel_dp->panel_power_up_delay = get_delay(t1_t3);
2499 intel_dp->backlight_on_delay = get_delay(t8);
2500 intel_dp->backlight_off_delay = get_delay(t9);
2501 intel_dp->panel_power_down_delay = get_delay(t10);
2502 intel_dp->panel_power_cycle_delay = get_delay(t11_t12);
2504 DRM_DEBUG_KMS("panel power up delay %d, power down delay %d, power cycle delay %d\n",
2505 intel_dp->panel_power_up_delay, intel_dp->panel_power_down_delay,
2506 intel_dp->panel_power_cycle_delay);
2508 DRM_DEBUG_KMS("backlight on delay %d, off delay %d\n",
2509 intel_dp->backlight_on_delay, intel_dp->backlight_off_delay);
2511 ironlake_edp_panel_vdd_on(intel_dp);
2512 ret = intel_dp_get_dpcd(intel_dp);
2513 ironlake_edp_panel_vdd_off(intel_dp, false);
2516 if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11)
2517 dev_priv->no_aux_handshake =
2518 intel_dp->dpcd[DP_MAX_DOWNSPREAD] &
2519 DP_NO_AUX_HANDSHAKE_LINK_TRAINING;
2521 /* if this fails, presume the device is a ghost */
2522 DRM_INFO("failed to retrieve link info, disabling eDP\n");
2523 intel_dp_encoder_destroy(&intel_dp->base.base);
2524 intel_dp_destroy(&intel_connector->base);
2529 intel_dp_i2c_init(intel_dp, intel_connector, name);
2531 intel_encoder->hot_plug = intel_dp_hot_plug;
2533 if (is_edp(intel_dp)) {
2534 dev_priv->int_edp_connector = connector;
2535 intel_panel_setup_backlight(dev);
2538 intel_dp_add_properties(intel_dp, connector);
2540 /* For G4X desktop chip, PEG_BAND_GAP_DATA 3:0 must first be written
2541 * 0xd. Failure to do so will result in spurious interrupts being
2542 * generated on the port when a cable is not attached.
2544 if (IS_G4X(dev) && !IS_GM45(dev)) {
2545 u32 temp = I915_READ(PEG_BAND_GAP_DATA);
2546 I915_WRITE(PEG_BAND_GAP_DATA, (temp & ~0xf) | 0xd);