2 * Copyright © 2006 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 FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
24 * Eric Anholt <eric@anholt.net>
27 #include <linux/dmi.h>
28 #include <drm/drm_dp_helper.h>
30 #include <drm/i915_drm.h>
32 #include "intel_bios.h"
34 #define SLAVE_ADDR1 0x70
35 #define SLAVE_ADDR2 0x72
37 static int panel_type;
40 find_section(struct bdb_header *bdb, int section_id)
44 u16 total, current_size;
47 /* skip to first section */
48 index += bdb->header_size;
49 total = bdb->bdb_size;
51 /* walk the sections looking for section_id */
52 while (index < total) {
53 current_id = *(base + index);
55 current_size = *((u16 *)(base + index));
57 if (current_id == section_id)
59 index += current_size;
66 get_blocksize(void *p)
68 u16 *block_ptr, block_size;
70 block_ptr = (u16 *)((char *)p - 2);
71 block_size = *block_ptr;
76 fill_detail_timing_data(struct drm_display_mode *panel_fixed_mode,
77 const struct lvds_dvo_timing *dvo_timing)
79 panel_fixed_mode->hdisplay = (dvo_timing->hactive_hi << 8) |
80 dvo_timing->hactive_lo;
81 panel_fixed_mode->hsync_start = panel_fixed_mode->hdisplay +
82 ((dvo_timing->hsync_off_hi << 8) | dvo_timing->hsync_off_lo);
83 panel_fixed_mode->hsync_end = panel_fixed_mode->hsync_start +
84 dvo_timing->hsync_pulse_width;
85 panel_fixed_mode->htotal = panel_fixed_mode->hdisplay +
86 ((dvo_timing->hblank_hi << 8) | dvo_timing->hblank_lo);
88 panel_fixed_mode->vdisplay = (dvo_timing->vactive_hi << 8) |
89 dvo_timing->vactive_lo;
90 panel_fixed_mode->vsync_start = panel_fixed_mode->vdisplay +
91 dvo_timing->vsync_off;
92 panel_fixed_mode->vsync_end = panel_fixed_mode->vsync_start +
93 dvo_timing->vsync_pulse_width;
94 panel_fixed_mode->vtotal = panel_fixed_mode->vdisplay +
95 ((dvo_timing->vblank_hi << 8) | dvo_timing->vblank_lo);
96 panel_fixed_mode->clock = dvo_timing->clock * 10;
97 panel_fixed_mode->type = DRM_MODE_TYPE_PREFERRED;
99 if (dvo_timing->hsync_positive)
100 panel_fixed_mode->flags |= DRM_MODE_FLAG_PHSYNC;
102 panel_fixed_mode->flags |= DRM_MODE_FLAG_NHSYNC;
104 if (dvo_timing->vsync_positive)
105 panel_fixed_mode->flags |= DRM_MODE_FLAG_PVSYNC;
107 panel_fixed_mode->flags |= DRM_MODE_FLAG_NVSYNC;
109 /* Some VBTs have bogus h/vtotal values */
110 if (panel_fixed_mode->hsync_end > panel_fixed_mode->htotal)
111 panel_fixed_mode->htotal = panel_fixed_mode->hsync_end + 1;
112 if (panel_fixed_mode->vsync_end > panel_fixed_mode->vtotal)
113 panel_fixed_mode->vtotal = panel_fixed_mode->vsync_end + 1;
115 drm_mode_set_name(panel_fixed_mode);
119 lvds_dvo_timing_equal_size(const struct lvds_dvo_timing *a,
120 const struct lvds_dvo_timing *b)
122 if (a->hactive_hi != b->hactive_hi ||
123 a->hactive_lo != b->hactive_lo)
126 if (a->hsync_off_hi != b->hsync_off_hi ||
127 a->hsync_off_lo != b->hsync_off_lo)
130 if (a->hsync_pulse_width != b->hsync_pulse_width)
133 if (a->hblank_hi != b->hblank_hi ||
134 a->hblank_lo != b->hblank_lo)
137 if (a->vactive_hi != b->vactive_hi ||
138 a->vactive_lo != b->vactive_lo)
141 if (a->vsync_off != b->vsync_off)
144 if (a->vsync_pulse_width != b->vsync_pulse_width)
147 if (a->vblank_hi != b->vblank_hi ||
148 a->vblank_lo != b->vblank_lo)
154 static const struct lvds_dvo_timing *
155 get_lvds_dvo_timing(const struct bdb_lvds_lfp_data *lvds_lfp_data,
156 const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs,
160 * the size of fp_timing varies on the different platform.
161 * So calculate the DVO timing relative offset in LVDS data
162 * entry to get the DVO timing entry
166 lvds_lfp_data_ptrs->ptr[1].dvo_timing_offset -
167 lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset;
168 int dvo_timing_offset =
169 lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset -
170 lvds_lfp_data_ptrs->ptr[0].fp_timing_offset;
171 char *entry = (char *)lvds_lfp_data->data + lfp_data_size * index;
173 return (struct lvds_dvo_timing *)(entry + dvo_timing_offset);
176 /* get lvds_fp_timing entry
177 * this function may return NULL if the corresponding entry is invalid
179 static const struct lvds_fp_timing *
180 get_lvds_fp_timing(const struct bdb_header *bdb,
181 const struct bdb_lvds_lfp_data *data,
182 const struct bdb_lvds_lfp_data_ptrs *ptrs,
185 size_t data_ofs = (const u8 *)data - (const u8 *)bdb;
186 u16 data_size = ((const u16 *)data)[-1]; /* stored in header */
189 if (index >= ARRAY_SIZE(ptrs->ptr))
191 ofs = ptrs->ptr[index].fp_timing_offset;
192 if (ofs < data_ofs ||
193 ofs + sizeof(struct lvds_fp_timing) > data_ofs + data_size)
195 return (const struct lvds_fp_timing *)((const u8 *)bdb + ofs);
198 /* Try to find integrated panel data */
200 parse_lfp_panel_data(struct drm_i915_private *dev_priv,
201 struct bdb_header *bdb)
203 const struct bdb_lvds_options *lvds_options;
204 const struct bdb_lvds_lfp_data *lvds_lfp_data;
205 const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs;
206 const struct lvds_dvo_timing *panel_dvo_timing;
207 const struct lvds_fp_timing *fp_timing;
208 struct drm_display_mode *panel_fixed_mode;
211 lvds_options = find_section(bdb, BDB_LVDS_OPTIONS);
215 dev_priv->vbt.lvds_dither = lvds_options->pixel_dither;
216 if (lvds_options->panel_type == 0xff)
219 panel_type = lvds_options->panel_type;
221 lvds_lfp_data = find_section(bdb, BDB_LVDS_LFP_DATA);
225 lvds_lfp_data_ptrs = find_section(bdb, BDB_LVDS_LFP_DATA_PTRS);
226 if (!lvds_lfp_data_ptrs)
229 dev_priv->vbt.lvds_vbt = 1;
231 panel_dvo_timing = get_lvds_dvo_timing(lvds_lfp_data,
233 lvds_options->panel_type);
235 panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
236 if (!panel_fixed_mode)
239 fill_detail_timing_data(panel_fixed_mode, panel_dvo_timing);
241 dev_priv->vbt.lfp_lvds_vbt_mode = panel_fixed_mode;
243 DRM_DEBUG_KMS("Found panel mode in BIOS VBT tables:\n");
244 drm_mode_debug_printmodeline(panel_fixed_mode);
247 * Iterate over the LVDS panel timing info to find the lowest clock
248 * for the native resolution.
250 downclock = panel_dvo_timing->clock;
251 for (i = 0; i < 16; i++) {
252 const struct lvds_dvo_timing *dvo_timing;
254 dvo_timing = get_lvds_dvo_timing(lvds_lfp_data,
257 if (lvds_dvo_timing_equal_size(dvo_timing, panel_dvo_timing) &&
258 dvo_timing->clock < downclock)
259 downclock = dvo_timing->clock;
262 if (downclock < panel_dvo_timing->clock && i915.lvds_downclock) {
263 dev_priv->lvds_downclock_avail = 1;
264 dev_priv->lvds_downclock = downclock * 10;
265 DRM_DEBUG_KMS("LVDS downclock is found in VBT. "
266 "Normal Clock %dKHz, downclock %dKHz\n",
267 panel_fixed_mode->clock, 10*downclock);
270 fp_timing = get_lvds_fp_timing(bdb, lvds_lfp_data,
272 lvds_options->panel_type);
274 /* check the resolution, just to be sure */
275 if (fp_timing->x_res == panel_fixed_mode->hdisplay &&
276 fp_timing->y_res == panel_fixed_mode->vdisplay) {
277 dev_priv->vbt.bios_lvds_val = fp_timing->lvds_reg_val;
278 DRM_DEBUG_KMS("VBT initial LVDS value %x\n",
279 dev_priv->vbt.bios_lvds_val);
285 parse_lfp_backlight(struct drm_i915_private *dev_priv, struct bdb_header *bdb)
287 const struct bdb_lfp_backlight_data *backlight_data;
288 const struct bdb_lfp_backlight_data_entry *entry;
290 /* Err to enabling backlight if no backlight block. */
291 dev_priv->vbt.backlight.present = true;
293 backlight_data = find_section(bdb, BDB_LVDS_BACKLIGHT);
297 if (backlight_data->entry_size != sizeof(backlight_data->data[0])) {
298 DRM_DEBUG_KMS("Unsupported backlight data entry size %u\n",
299 backlight_data->entry_size);
303 entry = &backlight_data->data[panel_type];
305 dev_priv->vbt.backlight.present = entry->type == BDB_BACKLIGHT_TYPE_PWM;
306 if (!dev_priv->vbt.backlight.present) {
307 DRM_DEBUG_KMS("PWM backlight not present in VBT (type %u)\n",
312 dev_priv->vbt.backlight.pwm_freq_hz = entry->pwm_freq_hz;
313 dev_priv->vbt.backlight.active_low_pwm = entry->active_low_pwm;
314 DRM_DEBUG_KMS("VBT backlight PWM modulation frequency %u Hz, "
315 "active %s, min brightness %u, level %u\n",
316 dev_priv->vbt.backlight.pwm_freq_hz,
317 dev_priv->vbt.backlight.active_low_pwm ? "low" : "high",
318 entry->min_brightness,
319 backlight_data->level[panel_type]);
322 /* Try to find sdvo panel data */
324 parse_sdvo_panel_data(struct drm_i915_private *dev_priv,
325 struct bdb_header *bdb)
327 struct lvds_dvo_timing *dvo_timing;
328 struct drm_display_mode *panel_fixed_mode;
331 index = i915.vbt_sdvo_panel_type;
333 DRM_DEBUG_KMS("Ignore SDVO panel mode from BIOS VBT tables.\n");
338 struct bdb_sdvo_lvds_options *sdvo_lvds_options;
340 sdvo_lvds_options = find_section(bdb, BDB_SDVO_LVDS_OPTIONS);
341 if (!sdvo_lvds_options)
344 index = sdvo_lvds_options->panel_type;
347 dvo_timing = find_section(bdb, BDB_SDVO_PANEL_DTDS);
351 panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
352 if (!panel_fixed_mode)
355 fill_detail_timing_data(panel_fixed_mode, dvo_timing + index);
357 dev_priv->vbt.sdvo_lvds_vbt_mode = panel_fixed_mode;
359 DRM_DEBUG_KMS("Found SDVO panel mode in BIOS VBT tables:\n");
360 drm_mode_debug_printmodeline(panel_fixed_mode);
363 static int intel_bios_ssc_frequency(struct drm_device *dev,
366 switch (INTEL_INFO(dev)->gen) {
368 return alternate ? 66667 : 48000;
371 return alternate ? 100000 : 96000;
373 return alternate ? 100000 : 120000;
378 parse_general_features(struct drm_i915_private *dev_priv,
379 struct bdb_header *bdb)
381 struct drm_device *dev = dev_priv->dev;
382 struct bdb_general_features *general;
384 general = find_section(bdb, BDB_GENERAL_FEATURES);
386 dev_priv->vbt.int_tv_support = general->int_tv_support;
387 dev_priv->vbt.int_crt_support = general->int_crt_support;
388 dev_priv->vbt.lvds_use_ssc = general->enable_ssc;
389 dev_priv->vbt.lvds_ssc_freq =
390 intel_bios_ssc_frequency(dev, general->ssc_freq);
391 dev_priv->vbt.display_clock_mode = general->display_clock_mode;
392 dev_priv->vbt.fdi_rx_polarity_inverted = general->fdi_rx_polarity_inverted;
393 DRM_DEBUG_KMS("BDB_GENERAL_FEATURES int_tv_support %d int_crt_support %d lvds_use_ssc %d lvds_ssc_freq %d display_clock_mode %d fdi_rx_polarity_inverted %d\n",
394 dev_priv->vbt.int_tv_support,
395 dev_priv->vbt.int_crt_support,
396 dev_priv->vbt.lvds_use_ssc,
397 dev_priv->vbt.lvds_ssc_freq,
398 dev_priv->vbt.display_clock_mode,
399 dev_priv->vbt.fdi_rx_polarity_inverted);
404 parse_general_definitions(struct drm_i915_private *dev_priv,
405 struct bdb_header *bdb)
407 struct bdb_general_definitions *general;
409 general = find_section(bdb, BDB_GENERAL_DEFINITIONS);
411 u16 block_size = get_blocksize(general);
412 if (block_size >= sizeof(*general)) {
413 int bus_pin = general->crt_ddc_gmbus_pin;
414 DRM_DEBUG_KMS("crt_ddc_bus_pin: %d\n", bus_pin);
415 if (intel_gmbus_is_port_valid(bus_pin))
416 dev_priv->vbt.crt_ddc_pin = bus_pin;
418 DRM_DEBUG_KMS("BDB_GD too small (%d). Invalid.\n",
425 parse_sdvo_device_mapping(struct drm_i915_private *dev_priv,
426 struct bdb_header *bdb)
428 struct sdvo_device_mapping *p_mapping;
429 struct bdb_general_definitions *p_defs;
430 union child_device_config *p_child;
431 int i, child_device_num, count;
434 p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
436 DRM_DEBUG_KMS("No general definition block is found, unable to construct sdvo mapping.\n");
439 /* judge whether the size of child device meets the requirements.
440 * If the child device size obtained from general definition block
441 * is different with sizeof(struct child_device_config), skip the
442 * parsing of sdvo device info
444 if (p_defs->child_dev_size != sizeof(*p_child)) {
445 /* different child dev size . Ignore it */
446 DRM_DEBUG_KMS("different child size is found. Invalid.\n");
449 /* get the block size of general definitions */
450 block_size = get_blocksize(p_defs);
451 /* get the number of child device */
452 child_device_num = (block_size - sizeof(*p_defs)) /
455 for (i = 0; i < child_device_num; i++) {
456 p_child = &(p_defs->devices[i]);
457 if (!p_child->old.device_type) {
458 /* skip the device block if device type is invalid */
461 if (p_child->old.slave_addr != SLAVE_ADDR1 &&
462 p_child->old.slave_addr != SLAVE_ADDR2) {
464 * If the slave address is neither 0x70 nor 0x72,
465 * it is not a SDVO device. Skip it.
469 if (p_child->old.dvo_port != DEVICE_PORT_DVOB &&
470 p_child->old.dvo_port != DEVICE_PORT_DVOC) {
471 /* skip the incorrect SDVO port */
472 DRM_DEBUG_KMS("Incorrect SDVO port. Skip it\n");
475 DRM_DEBUG_KMS("the SDVO device with slave addr %2x is found on"
477 p_child->old.slave_addr,
478 (p_child->old.dvo_port == DEVICE_PORT_DVOB) ?
480 p_mapping = &(dev_priv->sdvo_mappings[p_child->old.dvo_port - 1]);
481 if (!p_mapping->initialized) {
482 p_mapping->dvo_port = p_child->old.dvo_port;
483 p_mapping->slave_addr = p_child->old.slave_addr;
484 p_mapping->dvo_wiring = p_child->old.dvo_wiring;
485 p_mapping->ddc_pin = p_child->old.ddc_pin;
486 p_mapping->i2c_pin = p_child->old.i2c_pin;
487 p_mapping->initialized = 1;
488 DRM_DEBUG_KMS("SDVO device: dvo=%x, addr=%x, wiring=%d, ddc_pin=%d, i2c_pin=%d\n",
490 p_mapping->slave_addr,
491 p_mapping->dvo_wiring,
495 DRM_DEBUG_KMS("Maybe one SDVO port is shared by "
496 "two SDVO device.\n");
498 if (p_child->old.slave2_addr) {
499 /* Maybe this is a SDVO device with multiple inputs */
500 /* And the mapping info is not added */
501 DRM_DEBUG_KMS("there exists the slave2_addr. Maybe this"
502 " is a SDVO device with multiple inputs.\n");
508 /* No SDVO device info is found */
509 DRM_DEBUG_KMS("No SDVO device info is found in VBT\n");
515 parse_driver_features(struct drm_i915_private *dev_priv,
516 struct bdb_header *bdb)
518 struct bdb_driver_features *driver;
520 driver = find_section(bdb, BDB_DRIVER_FEATURES);
524 if (driver->lvds_config == BDB_DRIVER_FEATURE_EDP)
525 dev_priv->vbt.edp_support = 1;
527 if (driver->dual_frequency)
528 dev_priv->render_reclock_avail = true;
532 parse_edp(struct drm_i915_private *dev_priv, struct bdb_header *bdb)
535 struct edp_power_seq *edp_pps;
536 struct edp_link_params *edp_link_params;
538 edp = find_section(bdb, BDB_EDP);
540 if (dev_priv->vbt.edp_support)
541 DRM_DEBUG_KMS("No eDP BDB found but eDP panel supported.\n");
545 switch ((edp->color_depth >> (panel_type * 2)) & 3) {
547 dev_priv->vbt.edp_bpp = 18;
550 dev_priv->vbt.edp_bpp = 24;
553 dev_priv->vbt.edp_bpp = 30;
557 /* Get the eDP sequencing and link info */
558 edp_pps = &edp->power_seqs[panel_type];
559 edp_link_params = &edp->link_params[panel_type];
561 dev_priv->vbt.edp_pps = *edp_pps;
563 switch (edp_link_params->rate) {
565 dev_priv->vbt.edp_rate = DP_LINK_BW_1_62;
568 dev_priv->vbt.edp_rate = DP_LINK_BW_2_7;
571 DRM_DEBUG_KMS("VBT has unknown eDP link rate value %u\n",
572 edp_link_params->rate);
576 switch (edp_link_params->lanes) {
578 dev_priv->vbt.edp_lanes = 1;
581 dev_priv->vbt.edp_lanes = 2;
584 dev_priv->vbt.edp_lanes = 4;
587 DRM_DEBUG_KMS("VBT has unknown eDP lane count value %u\n",
588 edp_link_params->lanes);
592 switch (edp_link_params->preemphasis) {
593 case EDP_PREEMPHASIS_NONE:
594 dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPHASIS_0;
596 case EDP_PREEMPHASIS_3_5dB:
597 dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPHASIS_3_5;
599 case EDP_PREEMPHASIS_6dB:
600 dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPHASIS_6;
602 case EDP_PREEMPHASIS_9_5dB:
603 dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPHASIS_9_5;
606 DRM_DEBUG_KMS("VBT has unknown eDP pre-emphasis value %u\n",
607 edp_link_params->preemphasis);
611 switch (edp_link_params->vswing) {
612 case EDP_VSWING_0_4V:
613 dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_400;
615 case EDP_VSWING_0_6V:
616 dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_600;
618 case EDP_VSWING_0_8V:
619 dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_800;
621 case EDP_VSWING_1_2V:
622 dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_1200;
625 DRM_DEBUG_KMS("VBT has unknown eDP voltage swing value %u\n",
626 edp_link_params->vswing);
632 parse_mipi(struct drm_i915_private *dev_priv, struct bdb_header *bdb)
634 struct bdb_mipi *mipi;
636 mipi = find_section(bdb, BDB_MIPI_CONFIG);
638 DRM_DEBUG_KMS("No MIPI BDB found");
642 /* XXX: add more info */
643 dev_priv->vbt.dsi.panel_id = MIPI_DSI_GENERIC_PANEL_ID;
646 static void parse_ddi_port(struct drm_i915_private *dev_priv, enum port port,
647 struct bdb_header *bdb)
649 union child_device_config *it, *child = NULL;
650 struct ddi_vbt_port_info *info = &dev_priv->vbt.ddi_port_info[port];
651 uint8_t hdmi_level_shift;
653 bool is_dvi, is_hdmi, is_dp, is_edp, is_crt;
655 /* Each DDI port can have more than one value on the "DVO Port" field,
656 * so look for all the possible values for each port and abort if more
657 * than one is found. */
658 int dvo_ports[][2] = {
659 {DVO_PORT_HDMIA, DVO_PORT_DPA},
660 {DVO_PORT_HDMIB, DVO_PORT_DPB},
661 {DVO_PORT_HDMIC, DVO_PORT_DPC},
662 {DVO_PORT_HDMID, DVO_PORT_DPD},
663 {DVO_PORT_CRT, -1 /* Port E can only be DVO_PORT_CRT */ },
666 /* Find the child device to use, abort if more than one found. */
667 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
668 it = dev_priv->vbt.child_dev + i;
670 for (j = 0; j < 2; j++) {
671 if (dvo_ports[port][j] == -1)
674 if (it->common.dvo_port == dvo_ports[port][j]) {
676 DRM_DEBUG_KMS("More than one child device for port %c in VBT.\n",
687 aux_channel = child->raw[25];
689 is_dvi = child->common.device_type & DEVICE_TYPE_TMDS_DVI_SIGNALING;
690 is_dp = child->common.device_type & DEVICE_TYPE_DISPLAYPORT_OUTPUT;
691 is_crt = child->common.device_type & DEVICE_TYPE_ANALOG_OUTPUT;
692 is_hdmi = is_dvi && (child->common.device_type & DEVICE_TYPE_NOT_HDMI_OUTPUT) == 0;
693 is_edp = is_dp && (child->common.device_type & DEVICE_TYPE_INTERNAL_CONNECTOR);
695 info->supports_dvi = is_dvi;
696 info->supports_hdmi = is_hdmi;
697 info->supports_dp = is_dp;
699 DRM_DEBUG_KMS("Port %c VBT info: DP:%d HDMI:%d DVI:%d EDP:%d CRT:%d\n",
700 port_name(port), is_dp, is_hdmi, is_dvi, is_edp, is_crt);
702 if (is_edp && is_dvi)
703 DRM_DEBUG_KMS("Internal DP port %c is TMDS compatible\n",
705 if (is_crt && port != PORT_E)
706 DRM_DEBUG_KMS("Port %c is analog\n", port_name(port));
707 if (is_crt && (is_dvi || is_dp))
708 DRM_DEBUG_KMS("Analog port %c is also DP or TMDS compatible\n",
710 if (is_dvi && (port == PORT_A || port == PORT_E))
711 DRM_DEBUG_KMS("Port %c is TMDS compabile\n", port_name(port));
712 if (!is_dvi && !is_dp && !is_crt)
713 DRM_DEBUG_KMS("Port %c is not DP/TMDS/CRT compatible\n",
715 if (is_edp && (port == PORT_B || port == PORT_C || port == PORT_E))
716 DRM_DEBUG_KMS("Port %c is internal DP\n", port_name(port));
719 if (child->common.ddc_pin == 0x05 && port != PORT_B)
720 DRM_DEBUG_KMS("Unexpected DDC pin for port B\n");
721 if (child->common.ddc_pin == 0x04 && port != PORT_C)
722 DRM_DEBUG_KMS("Unexpected DDC pin for port C\n");
723 if (child->common.ddc_pin == 0x06 && port != PORT_D)
724 DRM_DEBUG_KMS("Unexpected DDC pin for port D\n");
728 if (aux_channel == 0x40 && port != PORT_A)
729 DRM_DEBUG_KMS("Unexpected AUX channel for port A\n");
730 if (aux_channel == 0x10 && port != PORT_B)
731 DRM_DEBUG_KMS("Unexpected AUX channel for port B\n");
732 if (aux_channel == 0x20 && port != PORT_C)
733 DRM_DEBUG_KMS("Unexpected AUX channel for port C\n");
734 if (aux_channel == 0x30 && port != PORT_D)
735 DRM_DEBUG_KMS("Unexpected AUX channel for port D\n");
738 if (bdb->version >= 158) {
739 /* The VBT HDMI level shift values match the table we have. */
740 hdmi_level_shift = child->raw[7] & 0xF;
741 if (hdmi_level_shift < 0xC) {
742 DRM_DEBUG_KMS("VBT HDMI level shift for port %c: %d\n",
745 info->hdmi_level_shift = hdmi_level_shift;
750 static void parse_ddi_ports(struct drm_i915_private *dev_priv,
751 struct bdb_header *bdb)
753 struct drm_device *dev = dev_priv->dev;
759 if (!dev_priv->vbt.child_dev_num)
762 if (bdb->version < 155)
765 for (port = PORT_A; port < I915_MAX_PORTS; port++)
766 parse_ddi_port(dev_priv, port, bdb);
770 parse_device_mapping(struct drm_i915_private *dev_priv,
771 struct bdb_header *bdb)
773 struct bdb_general_definitions *p_defs;
774 union child_device_config *p_child, *child_dev_ptr;
775 int i, child_device_num, count;
778 p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
780 DRM_DEBUG_KMS("No general definition block is found, no devices defined.\n");
783 /* judge whether the size of child device meets the requirements.
784 * If the child device size obtained from general definition block
785 * is different with sizeof(struct child_device_config), skip the
786 * parsing of sdvo device info
788 if (p_defs->child_dev_size != sizeof(*p_child)) {
789 /* different child dev size . Ignore it */
790 DRM_DEBUG_KMS("different child size is found. Invalid.\n");
793 /* get the block size of general definitions */
794 block_size = get_blocksize(p_defs);
795 /* get the number of child device */
796 child_device_num = (block_size - sizeof(*p_defs)) /
799 /* get the number of child device that is present */
800 for (i = 0; i < child_device_num; i++) {
801 p_child = &(p_defs->devices[i]);
802 if (!p_child->common.device_type) {
803 /* skip the device block if device type is invalid */
809 DRM_DEBUG_KMS("no child dev is parsed from VBT\n");
812 dev_priv->vbt.child_dev = kcalloc(count, sizeof(*p_child), GFP_KERNEL);
813 if (!dev_priv->vbt.child_dev) {
814 DRM_DEBUG_KMS("No memory space for child device\n");
818 dev_priv->vbt.child_dev_num = count;
820 for (i = 0; i < child_device_num; i++) {
821 p_child = &(p_defs->devices[i]);
822 if (!p_child->common.device_type) {
823 /* skip the device block if device type is invalid */
826 child_dev_ptr = dev_priv->vbt.child_dev + count;
828 memcpy((void *)child_dev_ptr, (void *)p_child,
835 init_vbt_defaults(struct drm_i915_private *dev_priv)
837 struct drm_device *dev = dev_priv->dev;
840 dev_priv->vbt.crt_ddc_pin = GMBUS_PORT_VGADDC;
843 dev_priv->vbt.lvds_dither = 1;
844 dev_priv->vbt.lvds_vbt = 0;
846 /* SDVO panel data */
847 dev_priv->vbt.sdvo_lvds_vbt_mode = NULL;
849 /* general features */
850 dev_priv->vbt.int_tv_support = 1;
851 dev_priv->vbt.int_crt_support = 1;
853 /* Default to using SSC */
854 dev_priv->vbt.lvds_use_ssc = 1;
856 * Core/SandyBridge/IvyBridge use alternative (120MHz) reference
859 dev_priv->vbt.lvds_ssc_freq = intel_bios_ssc_frequency(dev,
860 !HAS_PCH_SPLIT(dev));
861 DRM_DEBUG_KMS("Set default to SSC at %d kHz\n", dev_priv->vbt.lvds_ssc_freq);
863 for (port = PORT_A; port < I915_MAX_PORTS; port++) {
864 struct ddi_vbt_port_info *info =
865 &dev_priv->vbt.ddi_port_info[port];
867 /* Recommended BSpec default: 800mV 0dB. */
868 info->hdmi_level_shift = 6;
870 info->supports_dvi = (port != PORT_A && port != PORT_E);
871 info->supports_hdmi = info->supports_dvi;
872 info->supports_dp = (port != PORT_E);
876 static int __init intel_no_opregion_vbt_callback(const struct dmi_system_id *id)
878 DRM_DEBUG_KMS("Falling back to manually reading VBT from "
879 "VBIOS ROM for %s\n",
884 static const struct dmi_system_id intel_no_opregion_vbt[] = {
886 .callback = intel_no_opregion_vbt_callback,
887 .ident = "ThinkCentre A57",
889 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
890 DMI_MATCH(DMI_PRODUCT_NAME, "97027RG"),
897 * intel_parse_bios - find VBT and initialize settings from the BIOS
900 * Loads the Video BIOS and checks that the VBT exists. Sets scratch registers
901 * to appropriate values.
903 * Returns 0 on success, nonzero on failure.
906 intel_parse_bios(struct drm_device *dev)
908 struct drm_i915_private *dev_priv = dev->dev_private;
909 struct pci_dev *pdev = dev->pdev;
910 struct bdb_header *bdb = NULL;
911 u8 __iomem *bios = NULL;
913 if (HAS_PCH_NOP(dev))
916 init_vbt_defaults(dev_priv);
918 /* XXX Should this validation be moved to intel_opregion.c? */
919 if (!dmi_check_system(intel_no_opregion_vbt) && dev_priv->opregion.vbt) {
920 struct vbt_header *vbt = dev_priv->opregion.vbt;
921 if (memcmp(vbt->signature, "$VBT", 4) == 0) {
922 DRM_DEBUG_KMS("Using VBT from OpRegion: %20s\n",
924 bdb = (struct bdb_header *)((char *)vbt + vbt->bdb_offset);
926 dev_priv->opregion.vbt = NULL;
930 struct vbt_header *vbt = NULL;
934 bios = pci_map_rom(pdev, &size);
938 /* Scour memory looking for the VBT signature */
939 for (i = 0; i + 4 < size; i++) {
940 if (!memcmp(bios + i, "$VBT", 4)) {
941 vbt = (struct vbt_header *)(bios + i);
947 DRM_DEBUG_DRIVER("VBT signature missing\n");
948 pci_unmap_rom(pdev, bios);
952 bdb = (struct bdb_header *)(bios + i + vbt->bdb_offset);
955 /* Grab useful general definitions */
956 parse_general_features(dev_priv, bdb);
957 parse_general_definitions(dev_priv, bdb);
958 parse_lfp_panel_data(dev_priv, bdb);
959 parse_lfp_backlight(dev_priv, bdb);
960 parse_sdvo_panel_data(dev_priv, bdb);
961 parse_sdvo_device_mapping(dev_priv, bdb);
962 parse_device_mapping(dev_priv, bdb);
963 parse_driver_features(dev_priv, bdb);
964 parse_edp(dev_priv, bdb);
965 parse_mipi(dev_priv, bdb);
966 parse_ddi_ports(dev_priv, bdb);
969 pci_unmap_rom(pdev, bios);
974 /* Ensure that vital registers have been initialised, even if the BIOS
975 * is absent or just failing to do its job.
977 void intel_setup_bios(struct drm_device *dev)
979 struct drm_i915_private *dev_priv = dev->dev_private;
981 /* Set the Panel Power On/Off timings if uninitialized. */
982 if (!HAS_PCH_SPLIT(dev) &&
983 I915_READ(PP_ON_DELAYS) == 0 && I915_READ(PP_OFF_DELAYS) == 0) {
984 /* Set T2 to 40ms and T5 to 200ms */
985 I915_WRITE(PP_ON_DELAYS, 0x019007d0);
987 /* Set T3 to 35ms and Tx to 200ms */
988 I915_WRITE(PP_OFF_DELAYS, 0x015e07d0);