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>
28 #include <drm/drm_dp_helper.h>
29 #include <drm/i915_drm.h>
31 #include "intel_bios.h"
33 #define SLAVE_ADDR1 0x70
34 #define SLAVE_ADDR2 0x72
36 static int panel_type;
39 find_section(struct bdb_header *bdb, int section_id)
43 u16 total, current_size;
46 /* skip to first section */
47 index += bdb->header_size;
48 total = bdb->bdb_size;
50 /* walk the sections looking for section_id */
51 while (index < total) {
52 current_id = *(base + index);
54 current_size = *((u16 *)(base + index));
56 if (current_id == section_id)
58 index += current_size;
65 get_blocksize(void *p)
67 u16 *block_ptr, block_size;
69 block_ptr = (u16 *)((char *)p - 2);
70 block_size = *block_ptr;
75 fill_detail_timing_data(struct drm_display_mode *panel_fixed_mode,
76 const struct lvds_dvo_timing *dvo_timing)
78 panel_fixed_mode->hdisplay = (dvo_timing->hactive_hi << 8) |
79 dvo_timing->hactive_lo;
80 panel_fixed_mode->hsync_start = panel_fixed_mode->hdisplay +
81 ((dvo_timing->hsync_off_hi << 8) | dvo_timing->hsync_off_lo);
82 panel_fixed_mode->hsync_end = panel_fixed_mode->hsync_start +
83 dvo_timing->hsync_pulse_width;
84 panel_fixed_mode->htotal = panel_fixed_mode->hdisplay +
85 ((dvo_timing->hblank_hi << 8) | dvo_timing->hblank_lo);
87 panel_fixed_mode->vdisplay = (dvo_timing->vactive_hi << 8) |
88 dvo_timing->vactive_lo;
89 panel_fixed_mode->vsync_start = panel_fixed_mode->vdisplay +
90 dvo_timing->vsync_off;
91 panel_fixed_mode->vsync_end = panel_fixed_mode->vsync_start +
92 dvo_timing->vsync_pulse_width;
93 panel_fixed_mode->vtotal = panel_fixed_mode->vdisplay +
94 ((dvo_timing->vblank_hi << 8) | dvo_timing->vblank_lo);
95 panel_fixed_mode->clock = dvo_timing->clock * 10;
96 panel_fixed_mode->type = DRM_MODE_TYPE_PREFERRED;
98 if (dvo_timing->hsync_positive)
99 panel_fixed_mode->flags |= DRM_MODE_FLAG_PHSYNC;
101 panel_fixed_mode->flags |= DRM_MODE_FLAG_NHSYNC;
103 if (dvo_timing->vsync_positive)
104 panel_fixed_mode->flags |= DRM_MODE_FLAG_PVSYNC;
106 panel_fixed_mode->flags |= DRM_MODE_FLAG_NVSYNC;
108 /* Some VBTs have bogus h/vtotal values */
109 if (panel_fixed_mode->hsync_end > panel_fixed_mode->htotal)
110 panel_fixed_mode->htotal = panel_fixed_mode->hsync_end + 1;
111 if (panel_fixed_mode->vsync_end > panel_fixed_mode->vtotal)
112 panel_fixed_mode->vtotal = panel_fixed_mode->vsync_end + 1;
114 drm_mode_set_name(panel_fixed_mode);
118 lvds_dvo_timing_equal_size(const struct lvds_dvo_timing *a,
119 const struct lvds_dvo_timing *b)
121 if (a->hactive_hi != b->hactive_hi ||
122 a->hactive_lo != b->hactive_lo)
125 if (a->hsync_off_hi != b->hsync_off_hi ||
126 a->hsync_off_lo != b->hsync_off_lo)
129 if (a->hsync_pulse_width != b->hsync_pulse_width)
132 if (a->hblank_hi != b->hblank_hi ||
133 a->hblank_lo != b->hblank_lo)
136 if (a->vactive_hi != b->vactive_hi ||
137 a->vactive_lo != b->vactive_lo)
140 if (a->vsync_off != b->vsync_off)
143 if (a->vsync_pulse_width != b->vsync_pulse_width)
146 if (a->vblank_hi != b->vblank_hi ||
147 a->vblank_lo != b->vblank_lo)
153 static const struct lvds_dvo_timing *
154 get_lvds_dvo_timing(const struct bdb_lvds_lfp_data *lvds_lfp_data,
155 const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs,
159 * the size of fp_timing varies on the different platform.
160 * So calculate the DVO timing relative offset in LVDS data
161 * entry to get the DVO timing entry
165 lvds_lfp_data_ptrs->ptr[1].dvo_timing_offset -
166 lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset;
167 int dvo_timing_offset =
168 lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset -
169 lvds_lfp_data_ptrs->ptr[0].fp_timing_offset;
170 const char *entry = (const char *)lvds_lfp_data->data + lfp_data_size * index;
172 return (const struct lvds_dvo_timing *)(entry + dvo_timing_offset);
175 /* get lvds_fp_timing entry
176 * this function may return NULL if the corresponding entry is invalid
178 static const struct lvds_fp_timing *
179 get_lvds_fp_timing(const struct bdb_header *bdb,
180 const struct bdb_lvds_lfp_data *data,
181 const struct bdb_lvds_lfp_data_ptrs *ptrs,
184 size_t data_ofs = (const u8 *)data - (const u8 *)bdb;
185 u16 data_size = ((const u16 *)data)[-1]; /* stored in header */
188 if (index >= ARRAY_SIZE(ptrs->ptr))
190 ofs = ptrs->ptr[index].fp_timing_offset;
191 if (ofs < data_ofs ||
192 ofs + sizeof(struct lvds_fp_timing) > data_ofs + data_size)
194 return (const struct lvds_fp_timing *)((const u8 *)bdb + ofs);
197 /* Try to find integrated panel data */
199 parse_lfp_panel_data(struct drm_i915_private *dev_priv,
200 struct bdb_header *bdb)
202 const struct bdb_lvds_options *lvds_options;
203 const struct bdb_lvds_lfp_data *lvds_lfp_data;
204 const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs;
205 const struct lvds_dvo_timing *panel_dvo_timing;
206 const struct lvds_fp_timing *fp_timing;
207 struct drm_display_mode *panel_fixed_mode;
210 lvds_options = find_section(bdb, BDB_LVDS_OPTIONS);
214 dev_priv->lvds_dither = lvds_options->pixel_dither;
215 if (lvds_options->panel_type == 0xff)
218 panel_type = lvds_options->panel_type;
220 lvds_lfp_data = find_section(bdb, BDB_LVDS_LFP_DATA);
224 lvds_lfp_data_ptrs = find_section(bdb, BDB_LVDS_LFP_DATA_PTRS);
225 if (!lvds_lfp_data_ptrs)
228 dev_priv->lvds_vbt = 1;
230 panel_dvo_timing = get_lvds_dvo_timing(lvds_lfp_data,
232 lvds_options->panel_type);
234 panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
235 if (!panel_fixed_mode)
238 fill_detail_timing_data(panel_fixed_mode, panel_dvo_timing);
240 dev_priv->lfp_lvds_vbt_mode = panel_fixed_mode;
242 DRM_DEBUG_KMS("Found panel mode in BIOS VBT tables:\n");
243 drm_mode_debug_printmodeline(panel_fixed_mode);
246 * Iterate over the LVDS panel timing info to find the lowest clock
247 * for the native resolution.
249 downclock = panel_dvo_timing->clock;
250 for (i = 0; i < 16; i++) {
251 const struct lvds_dvo_timing *dvo_timing;
253 dvo_timing = get_lvds_dvo_timing(lvds_lfp_data,
256 if (lvds_dvo_timing_equal_size(dvo_timing, panel_dvo_timing) &&
257 dvo_timing->clock < downclock)
258 downclock = dvo_timing->clock;
261 if (downclock < panel_dvo_timing->clock && i915_lvds_downclock) {
262 dev_priv->lvds_downclock_avail = 1;
263 dev_priv->lvds_downclock = downclock * 10;
264 DRM_DEBUG_KMS("LVDS downclock is found in VBT. "
265 "Normal Clock %dKHz, downclock %dKHz\n",
266 panel_fixed_mode->clock, 10*downclock);
269 fp_timing = get_lvds_fp_timing(bdb, lvds_lfp_data,
271 lvds_options->panel_type);
273 /* check the resolution, just to be sure */
274 if (fp_timing->x_res == panel_fixed_mode->hdisplay &&
275 fp_timing->y_res == panel_fixed_mode->vdisplay) {
276 dev_priv->bios_lvds_val = fp_timing->lvds_reg_val;
277 DRM_DEBUG_KMS("VBT initial LVDS value %x\n",
278 dev_priv->bios_lvds_val);
283 /* Try to find sdvo panel data */
285 parse_sdvo_panel_data(struct drm_i915_private *dev_priv,
286 struct bdb_header *bdb)
288 struct lvds_dvo_timing *dvo_timing;
289 struct drm_display_mode *panel_fixed_mode;
292 index = i915_vbt_sdvo_panel_type;
294 DRM_DEBUG_KMS("Ignore SDVO panel mode from BIOS VBT tables.\n");
299 struct bdb_sdvo_lvds_options *sdvo_lvds_options;
301 sdvo_lvds_options = find_section(bdb, BDB_SDVO_LVDS_OPTIONS);
302 if (!sdvo_lvds_options)
305 index = sdvo_lvds_options->panel_type;
308 dvo_timing = find_section(bdb, BDB_SDVO_PANEL_DTDS);
312 panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
313 if (!panel_fixed_mode)
316 fill_detail_timing_data(panel_fixed_mode, dvo_timing + index);
318 dev_priv->sdvo_lvds_vbt_mode = panel_fixed_mode;
320 DRM_DEBUG_KMS("Found SDVO panel mode in BIOS VBT tables:\n");
321 drm_mode_debug_printmodeline(panel_fixed_mode);
324 static int intel_bios_ssc_frequency(struct drm_device *dev,
327 switch (INTEL_INFO(dev)->gen) {
329 return alternate ? 66 : 48;
332 return alternate ? 100 : 96;
334 return alternate ? 100 : 120;
339 parse_general_features(struct drm_i915_private *dev_priv,
340 struct bdb_header *bdb)
342 struct drm_device *dev = dev_priv->dev;
343 struct bdb_general_features *general;
345 general = find_section(bdb, BDB_GENERAL_FEATURES);
347 dev_priv->int_tv_support = general->int_tv_support;
348 dev_priv->int_crt_support = general->int_crt_support;
349 dev_priv->lvds_use_ssc = general->enable_ssc;
350 dev_priv->lvds_ssc_freq =
351 intel_bios_ssc_frequency(dev, general->ssc_freq);
352 dev_priv->display_clock_mode = general->display_clock_mode;
353 dev_priv->fdi_rx_polarity_inverted = general->fdi_rx_polarity_inverted;
354 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",
355 dev_priv->int_tv_support,
356 dev_priv->int_crt_support,
357 dev_priv->lvds_use_ssc,
358 dev_priv->lvds_ssc_freq,
359 dev_priv->display_clock_mode,
360 dev_priv->fdi_rx_polarity_inverted);
365 parse_general_definitions(struct drm_i915_private *dev_priv,
366 struct bdb_header *bdb)
368 struct bdb_general_definitions *general;
370 general = find_section(bdb, BDB_GENERAL_DEFINITIONS);
372 u16 block_size = get_blocksize(general);
373 if (block_size >= sizeof(*general)) {
374 int bus_pin = general->crt_ddc_gmbus_pin;
375 DRM_DEBUG_KMS("crt_ddc_bus_pin: %d\n", bus_pin);
376 if (intel_gmbus_is_port_valid(bus_pin))
377 dev_priv->crt_ddc_pin = bus_pin;
379 DRM_DEBUG_KMS("BDB_GD too small (%d). Invalid.\n",
386 parse_sdvo_device_mapping(struct drm_i915_private *dev_priv,
387 struct bdb_header *bdb)
389 struct sdvo_device_mapping *p_mapping;
390 struct bdb_general_definitions *p_defs;
391 struct child_device_config *p_child;
392 int i, child_device_num, count;
395 p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
397 DRM_DEBUG_KMS("No general definition block is found, unable to construct sdvo mapping.\n");
400 /* judge whether the size of child device meets the requirements.
401 * If the child device size obtained from general definition block
402 * is different with sizeof(struct child_device_config), skip the
403 * parsing of sdvo device info
405 if (p_defs->child_dev_size != sizeof(*p_child)) {
406 /* different child dev size . Ignore it */
407 DRM_DEBUG_KMS("different child size is found. Invalid.\n");
410 /* get the block size of general definitions */
411 block_size = get_blocksize(p_defs);
412 /* get the number of child device */
413 child_device_num = (block_size - sizeof(*p_defs)) /
416 for (i = 0; i < child_device_num; i++) {
417 p_child = &(p_defs->devices[i]);
418 if (!p_child->device_type) {
419 /* skip the device block if device type is invalid */
422 if (p_child->slave_addr != SLAVE_ADDR1 &&
423 p_child->slave_addr != SLAVE_ADDR2) {
425 * If the slave address is neither 0x70 nor 0x72,
426 * it is not a SDVO device. Skip it.
430 if (p_child->dvo_port != DEVICE_PORT_DVOB &&
431 p_child->dvo_port != DEVICE_PORT_DVOC) {
432 /* skip the incorrect SDVO port */
433 DRM_DEBUG_KMS("Incorrect SDVO port. Skip it\n");
436 DRM_DEBUG_KMS("the SDVO device with slave addr %2x is found on"
439 (p_child->dvo_port == DEVICE_PORT_DVOB) ?
441 p_mapping = &(dev_priv->sdvo_mappings[p_child->dvo_port - 1]);
442 if (!p_mapping->initialized) {
443 p_mapping->dvo_port = p_child->dvo_port;
444 p_mapping->slave_addr = p_child->slave_addr;
445 p_mapping->dvo_wiring = p_child->dvo_wiring;
446 p_mapping->ddc_pin = p_child->ddc_pin;
447 p_mapping->i2c_pin = p_child->i2c_pin;
448 p_mapping->initialized = 1;
449 DRM_DEBUG_KMS("SDVO device: dvo=%x, addr=%x, wiring=%d, ddc_pin=%d, i2c_pin=%d\n",
451 p_mapping->slave_addr,
452 p_mapping->dvo_wiring,
456 DRM_DEBUG_KMS("Maybe one SDVO port is shared by "
457 "two SDVO device.\n");
459 if (p_child->slave2_addr) {
460 /* Maybe this is a SDVO device with multiple inputs */
461 /* And the mapping info is not added */
462 DRM_DEBUG_KMS("there exists the slave2_addr. Maybe this"
463 " is a SDVO device with multiple inputs.\n");
469 /* No SDVO device info is found */
470 DRM_DEBUG_KMS("No SDVO device info is found in VBT\n");
476 parse_driver_features(struct drm_i915_private *dev_priv,
477 struct bdb_header *bdb)
479 struct drm_device *dev = dev_priv->dev;
480 struct bdb_driver_features *driver;
482 driver = find_section(bdb, BDB_DRIVER_FEATURES);
486 if (SUPPORTS_EDP(dev) &&
487 driver->lvds_config == BDB_DRIVER_FEATURE_EDP)
488 dev_priv->edp.support = 1;
490 if (driver->dual_frequency)
491 dev_priv->render_reclock_avail = true;
495 parse_edp(struct drm_i915_private *dev_priv, struct bdb_header *bdb)
498 struct edp_power_seq *edp_pps;
499 struct edp_link_params *edp_link_params;
501 edp = find_section(bdb, BDB_EDP);
503 if (SUPPORTS_EDP(dev_priv->dev) && dev_priv->edp.support)
504 DRM_DEBUG_KMS("No eDP BDB found but eDP panel supported.\n");
508 switch ((edp->color_depth >> (panel_type * 2)) & 3) {
510 dev_priv->edp.bpp = 18;
513 dev_priv->edp.bpp = 24;
516 dev_priv->edp.bpp = 30;
520 /* Get the eDP sequencing and link info */
521 edp_pps = &edp->power_seqs[panel_type];
522 edp_link_params = &edp->link_params[panel_type];
524 dev_priv->edp.pps = *edp_pps;
526 dev_priv->edp.rate = edp_link_params->rate ? DP_LINK_BW_2_7 :
528 switch (edp_link_params->lanes) {
530 dev_priv->edp.lanes = 1;
533 dev_priv->edp.lanes = 2;
537 dev_priv->edp.lanes = 4;
540 switch (edp_link_params->preemphasis) {
542 dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPHASIS_0;
545 dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPHASIS_3_5;
548 dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPHASIS_6;
551 dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPHASIS_9_5;
554 switch (edp_link_params->vswing) {
556 dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_400;
559 dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_600;
562 dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_800;
565 dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_1200;
571 parse_device_mapping(struct drm_i915_private *dev_priv,
572 struct bdb_header *bdb)
574 struct bdb_general_definitions *p_defs;
575 struct child_device_config *p_child, *child_dev_ptr;
576 int i, child_device_num, count;
579 p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
581 DRM_DEBUG_KMS("No general definition block is found, no devices defined.\n");
584 /* judge whether the size of child device meets the requirements.
585 * If the child device size obtained from general definition block
586 * is different with sizeof(struct child_device_config), skip the
587 * parsing of sdvo device info
589 if (p_defs->child_dev_size != sizeof(*p_child)) {
590 /* different child dev size . Ignore it */
591 DRM_DEBUG_KMS("different child size is found. Invalid.\n");
594 /* get the block size of general definitions */
595 block_size = get_blocksize(p_defs);
596 /* get the number of child device */
597 child_device_num = (block_size - sizeof(*p_defs)) /
600 /* get the number of child device that is present */
601 for (i = 0; i < child_device_num; i++) {
602 p_child = &(p_defs->devices[i]);
603 if (!p_child->device_type) {
604 /* skip the device block if device type is invalid */
610 DRM_DEBUG_KMS("no child dev is parsed from VBT\n");
613 dev_priv->child_dev = kmalloc(sizeof(*p_child) * count, M_DRM,
615 if (!dev_priv->child_dev) {
616 DRM_DEBUG_KMS("No memory space for child device\n");
620 dev_priv->child_dev_num = count;
622 for (i = 0; i < child_device_num; i++) {
623 p_child = &(p_defs->devices[i]);
624 if (!p_child->device_type) {
625 /* skip the device block if device type is invalid */
628 child_dev_ptr = dev_priv->child_dev + count;
630 memcpy((void *)child_dev_ptr, (void *)p_child,
637 init_vbt_defaults(struct drm_i915_private *dev_priv)
639 struct drm_device *dev = dev_priv->dev;
641 dev_priv->crt_ddc_pin = GMBUS_PORT_VGADDC;
644 dev_priv->lvds_dither = 1;
645 dev_priv->lvds_vbt = 0;
647 /* SDVO panel data */
648 dev_priv->sdvo_lvds_vbt_mode = NULL;
650 /* general features */
651 dev_priv->int_tv_support = 1;
652 dev_priv->int_crt_support = 1;
654 /* Default to using SSC */
655 dev_priv->lvds_use_ssc = 1;
656 dev_priv->lvds_ssc_freq = intel_bios_ssc_frequency(dev, 1);
657 DRM_DEBUG_KMS("Set default to SSC at %dMHz\n", dev_priv->lvds_ssc_freq);
660 static int __init intel_no_opregion_vbt_callback(const struct dmi_system_id *id)
662 DRM_DEBUG_KMS("Falling back to manually reading VBT from "
663 "VBIOS ROM for %s\n",
668 static const struct dmi_system_id intel_no_opregion_vbt[] = {
670 .callback = intel_no_opregion_vbt_callback,
671 .ident = "ThinkCentre A57",
673 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
674 DMI_MATCH(DMI_PRODUCT_NAME, "97027RG"),
681 * intel_parse_bios - find VBT and initialize settings from the BIOS
684 * Loads the Video BIOS and checks that the VBT exists. Sets scratch registers
685 * to appropriate values.
687 * Returns 0 on success, nonzero on failure.
690 intel_parse_bios(struct drm_device *dev)
692 struct drm_i915_private *dev_priv = dev->dev_private;
693 struct bdb_header *bdb = NULL;
694 u8 __iomem *bios = NULL;
696 if (HAS_PCH_NOP(dev))
699 init_vbt_defaults(dev_priv);
701 /* XXX Should this validation be moved to intel_opregion.c? */
702 if (!dmi_check_system(intel_no_opregion_vbt) && dev_priv->opregion.vbt) {
703 struct vbt_header *vbt = dev_priv->opregion.vbt;
704 if (memcmp(vbt->signature, "$VBT", 4) == 0) {
705 DRM_DEBUG_KMS("Using VBT from OpRegion: %20s\n",
707 bdb = (struct bdb_header *)((char *)vbt + vbt->bdb_offset);
709 dev_priv->opregion.vbt = NULL;
720 struct vbt_header *vbt = NULL;
724 bios = pci_map_rom(pdev, &size);
728 /* Scour memory looking for the VBT signature */
729 for (i = 0; i + 4 < size; i++) {
730 if (!memcmp(bios + i, "$VBT", 4)) {
731 vbt = (struct vbt_header *)(bios + i);
737 DRM_DEBUG_DRIVER("VBT signature missing\n");
738 pci_unmap_rom(pdev, bios);
742 bdb = (struct bdb_header *)(bios + i + vbt->bdb_offset);
746 /* Grab useful general definitions */
747 parse_general_features(dev_priv, bdb);
748 parse_general_definitions(dev_priv, bdb);
749 parse_lfp_panel_data(dev_priv, bdb);
750 parse_sdvo_panel_data(dev_priv, bdb);
751 parse_sdvo_device_mapping(dev_priv, bdb);
752 parse_device_mapping(dev_priv, bdb);
753 parse_driver_features(dev_priv, bdb);
754 parse_edp(dev_priv, bdb);
758 pci_unmap_rom(pdev, bios);
764 /* Ensure that vital registers have been initialised, even if the BIOS
765 * is absent or just failing to do its job.
767 void intel_setup_bios(struct drm_device *dev)
769 struct drm_i915_private *dev_priv = dev->dev_private;
771 /* Set the Panel Power On/Off timings if uninitialized. */
772 if (!HAS_PCH_SPLIT(dev) &&
773 I915_READ(PP_ON_DELAYS) == 0 && I915_READ(PP_OFF_DELAYS) == 0) {
774 /* Set T2 to 40ms and T5 to 200ms */
775 I915_WRITE(PP_ON_DELAYS, 0x019007d0);
777 /* Set T3 to 35ms and Tx to 200ms */
778 I915_WRITE(PP_OFF_DELAYS, 0x015e07d0);