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 = kmalloc(sizeof(*panel_fixed_mode), M_DRM,
236 if (!panel_fixed_mode)
239 fill_detail_timing_data(panel_fixed_mode, panel_dvo_timing);
241 dev_priv->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->bios_lvds_val = fp_timing->lvds_reg_val;
278 DRM_DEBUG_KMS("VBT initial LVDS value %x\n",
279 dev_priv->bios_lvds_val);
284 /* Try to find sdvo panel data */
286 parse_sdvo_panel_data(struct drm_i915_private *dev_priv,
287 struct bdb_header *bdb)
289 struct lvds_dvo_timing *dvo_timing;
290 struct drm_display_mode *panel_fixed_mode;
293 index = i915_vbt_sdvo_panel_type;
295 DRM_DEBUG_KMS("Ignore SDVO panel mode from BIOS VBT tables.\n");
300 struct bdb_sdvo_lvds_options *sdvo_lvds_options;
302 sdvo_lvds_options = find_section(bdb, BDB_SDVO_LVDS_OPTIONS);
303 if (!sdvo_lvds_options)
306 index = sdvo_lvds_options->panel_type;
309 dvo_timing = find_section(bdb, BDB_SDVO_PANEL_DTDS);
313 panel_fixed_mode = kmalloc(sizeof(*panel_fixed_mode), M_DRM,
315 if (!panel_fixed_mode)
318 fill_detail_timing_data(panel_fixed_mode, dvo_timing + index);
320 dev_priv->sdvo_lvds_vbt_mode = panel_fixed_mode;
322 DRM_DEBUG_KMS("Found SDVO panel mode in BIOS VBT tables:\n");
323 drm_mode_debug_printmodeline(panel_fixed_mode);
326 static int intel_bios_ssc_frequency(struct drm_device *dev,
329 switch (INTEL_INFO(dev)->gen) {
331 return alternate ? 66 : 48;
334 return alternate ? 100 : 96;
336 return alternate ? 100 : 120;
341 parse_general_features(struct drm_i915_private *dev_priv,
342 struct bdb_header *bdb)
344 struct drm_device *dev = dev_priv->dev;
345 struct bdb_general_features *general;
347 general = find_section(bdb, BDB_GENERAL_FEATURES);
349 dev_priv->int_tv_support = general->int_tv_support;
350 dev_priv->int_crt_support = general->int_crt_support;
351 dev_priv->lvds_use_ssc = general->enable_ssc;
352 dev_priv->lvds_ssc_freq =
353 intel_bios_ssc_frequency(dev, general->ssc_freq);
354 dev_priv->display_clock_mode = general->display_clock_mode;
355 dev_priv->fdi_rx_polarity_inverted = general->fdi_rx_polarity_inverted;
356 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",
357 dev_priv->int_tv_support,
358 dev_priv->int_crt_support,
359 dev_priv->lvds_use_ssc,
360 dev_priv->lvds_ssc_freq,
361 dev_priv->display_clock_mode,
362 dev_priv->fdi_rx_polarity_inverted);
367 parse_general_definitions(struct drm_i915_private *dev_priv,
368 struct bdb_header *bdb)
370 struct bdb_general_definitions *general;
372 general = find_section(bdb, BDB_GENERAL_DEFINITIONS);
374 u16 block_size = get_blocksize(general);
375 if (block_size >= sizeof(*general)) {
376 int bus_pin = general->crt_ddc_gmbus_pin;
377 DRM_DEBUG_KMS("crt_ddc_bus_pin: %d\n", bus_pin);
378 if (intel_gmbus_is_port_valid(bus_pin))
379 dev_priv->crt_ddc_pin = bus_pin;
381 DRM_DEBUG_KMS("BDB_GD too small (%d). Invalid.\n",
388 parse_sdvo_device_mapping(struct drm_i915_private *dev_priv,
389 struct bdb_header *bdb)
391 struct sdvo_device_mapping *p_mapping;
392 struct bdb_general_definitions *p_defs;
393 struct child_device_config *p_child;
394 int i, child_device_num, count;
397 p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
399 DRM_DEBUG_KMS("No general definition block is found, unable to construct sdvo mapping.\n");
402 /* judge whether the size of child device meets the requirements.
403 * If the child device size obtained from general definition block
404 * is different with sizeof(struct child_device_config), skip the
405 * parsing of sdvo device info
407 if (p_defs->child_dev_size != sizeof(*p_child)) {
408 /* different child dev size . Ignore it */
409 DRM_DEBUG_KMS("different child size is found. Invalid.\n");
412 /* get the block size of general definitions */
413 block_size = get_blocksize(p_defs);
414 /* get the number of child device */
415 child_device_num = (block_size - sizeof(*p_defs)) /
418 for (i = 0; i < child_device_num; i++) {
419 p_child = &(p_defs->devices[i]);
420 if (!p_child->device_type) {
421 /* skip the device block if device type is invalid */
424 if (p_child->slave_addr != SLAVE_ADDR1 &&
425 p_child->slave_addr != SLAVE_ADDR2) {
427 * If the slave address is neither 0x70 nor 0x72,
428 * it is not a SDVO device. Skip it.
432 if (p_child->dvo_port != DEVICE_PORT_DVOB &&
433 p_child->dvo_port != DEVICE_PORT_DVOC) {
434 /* skip the incorrect SDVO port */
435 DRM_DEBUG_KMS("Incorrect SDVO port. Skip it\n");
438 DRM_DEBUG_KMS("the SDVO device with slave addr %2x is found on"
441 (p_child->dvo_port == DEVICE_PORT_DVOB) ?
443 p_mapping = &(dev_priv->sdvo_mappings[p_child->dvo_port - 1]);
444 if (!p_mapping->initialized) {
445 p_mapping->dvo_port = p_child->dvo_port;
446 p_mapping->slave_addr = p_child->slave_addr;
447 p_mapping->dvo_wiring = p_child->dvo_wiring;
448 p_mapping->ddc_pin = p_child->ddc_pin;
449 p_mapping->i2c_pin = p_child->i2c_pin;
450 p_mapping->initialized = 1;
451 DRM_DEBUG_KMS("SDVO device: dvo=%x, addr=%x, wiring=%d, ddc_pin=%d, i2c_pin=%d\n",
453 p_mapping->slave_addr,
454 p_mapping->dvo_wiring,
458 DRM_DEBUG_KMS("Maybe one SDVO port is shared by "
459 "two SDVO device.\n");
461 if (p_child->slave2_addr) {
462 /* Maybe this is a SDVO device with multiple inputs */
463 /* And the mapping info is not added */
464 DRM_DEBUG_KMS("there exists the slave2_addr. Maybe this"
465 " is a SDVO device with multiple inputs.\n");
471 /* No SDVO device info is found */
472 DRM_DEBUG_KMS("No SDVO device info is found in VBT\n");
478 parse_driver_features(struct drm_i915_private *dev_priv,
479 struct bdb_header *bdb)
481 struct drm_device *dev = dev_priv->dev;
482 struct bdb_driver_features *driver;
484 driver = find_section(bdb, BDB_DRIVER_FEATURES);
488 if (SUPPORTS_EDP(dev) &&
489 driver->lvds_config == BDB_DRIVER_FEATURE_EDP)
490 dev_priv->edp.support = 1;
492 if (driver->dual_frequency)
493 dev_priv->render_reclock_avail = true;
497 parse_edp(struct drm_i915_private *dev_priv, struct bdb_header *bdb)
500 struct edp_power_seq *edp_pps;
501 struct edp_link_params *edp_link_params;
503 edp = find_section(bdb, BDB_EDP);
505 if (SUPPORTS_EDP(dev_priv->dev) && dev_priv->edp.support)
506 DRM_DEBUG_KMS("No eDP BDB found but eDP panel supported.\n");
510 switch ((edp->color_depth >> (panel_type * 2)) & 3) {
512 dev_priv->edp.bpp = 18;
515 dev_priv->edp.bpp = 24;
518 dev_priv->edp.bpp = 30;
522 /* Get the eDP sequencing and link info */
523 edp_pps = &edp->power_seqs[panel_type];
524 edp_link_params = &edp->link_params[panel_type];
526 dev_priv->edp.pps = *edp_pps;
528 dev_priv->edp.rate = edp_link_params->rate ? DP_LINK_BW_2_7 :
530 switch (edp_link_params->lanes) {
532 dev_priv->edp.lanes = 1;
535 dev_priv->edp.lanes = 2;
539 dev_priv->edp.lanes = 4;
542 switch (edp_link_params->preemphasis) {
544 dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPHASIS_0;
547 dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPHASIS_3_5;
550 dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPHASIS_6;
553 dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPHASIS_9_5;
556 switch (edp_link_params->vswing) {
558 dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_400;
561 dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_600;
564 dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_800;
567 dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_1200;
573 parse_device_mapping(struct drm_i915_private *dev_priv,
574 struct bdb_header *bdb)
576 struct bdb_general_definitions *p_defs;
577 struct child_device_config *p_child, *child_dev_ptr;
578 int i, child_device_num, count;
581 p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
583 DRM_DEBUG_KMS("No general definition block is found, no devices defined.\n");
586 /* judge whether the size of child device meets the requirements.
587 * If the child device size obtained from general definition block
588 * is different with sizeof(struct child_device_config), skip the
589 * parsing of sdvo device info
591 if (p_defs->child_dev_size != sizeof(*p_child)) {
592 /* different child dev size . Ignore it */
593 DRM_DEBUG_KMS("different child size is found. Invalid.\n");
596 /* get the block size of general definitions */
597 block_size = get_blocksize(p_defs);
598 /* get the number of child device */
599 child_device_num = (block_size - sizeof(*p_defs)) /
602 /* get the number of child device that is present */
603 for (i = 0; i < child_device_num; i++) {
604 p_child = &(p_defs->devices[i]);
605 if (!p_child->device_type) {
606 /* skip the device block if device type is invalid */
612 DRM_DEBUG_KMS("no child dev is parsed from VBT\n");
615 dev_priv->child_dev = kmalloc(sizeof(*p_child) * count, M_DRM,
617 if (!dev_priv->child_dev) {
618 DRM_DEBUG_KMS("No memory space for child device\n");
622 dev_priv->child_dev_num = count;
624 for (i = 0; i < child_device_num; i++) {
625 p_child = &(p_defs->devices[i]);
626 if (!p_child->device_type) {
627 /* skip the device block if device type is invalid */
630 child_dev_ptr = dev_priv->child_dev + count;
632 memcpy((void *)child_dev_ptr, (void *)p_child,
639 init_vbt_defaults(struct drm_i915_private *dev_priv)
641 struct drm_device *dev = dev_priv->dev;
643 dev_priv->crt_ddc_pin = GMBUS_PORT_VGADDC;
646 dev_priv->lvds_dither = 1;
647 dev_priv->lvds_vbt = 0;
649 /* SDVO panel data */
650 dev_priv->sdvo_lvds_vbt_mode = NULL;
652 /* general features */
653 dev_priv->int_tv_support = 1;
654 dev_priv->int_crt_support = 1;
656 /* Default to using SSC */
657 dev_priv->lvds_use_ssc = 1;
658 dev_priv->lvds_ssc_freq = intel_bios_ssc_frequency(dev, 1);
659 DRM_DEBUG_KMS("Set default to SSC at %dMHz\n", dev_priv->lvds_ssc_freq);
662 static int __init intel_no_opregion_vbt_callback(const struct dmi_system_id *id)
664 DRM_DEBUG_KMS("Falling back to manually reading VBT from "
665 "VBIOS ROM for %s\n",
670 static const struct dmi_system_id intel_no_opregion_vbt[] = {
672 .callback = intel_no_opregion_vbt_callback,
673 .ident = "ThinkCentre A57",
675 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
676 DMI_MATCH(DMI_PRODUCT_NAME, "97027RG"),
683 * intel_parse_bios - find VBT and initialize settings from the BIOS
686 * Loads the Video BIOS and checks that the VBT exists. Sets scratch registers
687 * to appropriate values.
689 * Returns 0 on success, nonzero on failure.
692 intel_parse_bios(struct drm_device *dev)
694 struct drm_i915_private *dev_priv = dev->dev_private;
695 struct bdb_header *bdb = NULL;
696 u8 __iomem *bios = NULL;
698 init_vbt_defaults(dev_priv);
700 /* XXX Should this validation be moved to intel_opregion.c? */
701 if (!dmi_check_system(intel_no_opregion_vbt) && dev_priv->opregion.vbt) {
702 struct vbt_header *vbt = dev_priv->opregion.vbt;
703 if (memcmp(vbt->signature, "$VBT", 4) == 0) {
704 DRM_DEBUG_KMS("Using VBT from OpRegion: %20s\n",
706 bdb = (struct bdb_header *)((char *)vbt + vbt->bdb_offset);
708 dev_priv->opregion.vbt = NULL;
719 struct vbt_header *vbt = NULL;
723 bios = pci_map_rom(pdev, &size);
727 /* Scour memory looking for the VBT signature */
728 for (i = 0; i + 4 < size; i++) {
729 if (!memcmp(bios + i, "$VBT", 4)) {
730 vbt = (struct vbt_header *)(bios + i);
736 DRM_DEBUG_DRIVER("VBT signature missing\n");
737 pci_unmap_rom(pdev, bios);
741 bdb = (struct bdb_header *)(bios + i + vbt->bdb_offset);
745 /* Grab useful general definitions */
746 parse_general_features(dev_priv, bdb);
747 parse_general_definitions(dev_priv, bdb);
748 parse_lfp_panel_data(dev_priv, bdb);
749 parse_sdvo_panel_data(dev_priv, bdb);
750 parse_sdvo_device_mapping(dev_priv, bdb);
751 parse_device_mapping(dev_priv, bdb);
752 parse_driver_features(dev_priv, bdb);
753 parse_edp(dev_priv, bdb);
757 pci_unmap_rom(pdev, bios);
763 /* Ensure that vital registers have been initialised, even if the BIOS
764 * is absent or just failing to do its job.
766 void intel_setup_bios(struct drm_device *dev)
768 struct drm_i915_private *dev_priv = dev->dev_private;
770 /* Set the Panel Power On/Off timings if uninitialized. */
771 if (!HAS_PCH_SPLIT(dev) &&
772 I915_READ(PP_ON_DELAYS) == 0 && I915_READ(PP_OFF_DELAYS) == 0) {
773 /* Set T2 to 40ms and T5 to 200ms */
774 I915_WRITE(PP_ON_DELAYS, 0x019007d0);
776 /* Set T3 to 35ms and Tx to 200ms */
777 I915_WRITE(PP_OFF_DELAYS, 0x015e07d0);