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 <dev/drm2/drmP.h>
29 #include <dev/drm2/drm.h>
30 #include <dev/drm2/drm_dp_helper.h>
31 #include <dev/drm2/i915/i915_drm.h>
32 #include <dev/drm2/i915/i915_drv.h>
33 #include <dev/drm2/i915/intel_bios.h>
35 #define SLAVE_ADDR1 0x70
36 #define SLAVE_ADDR2 0x72
38 static int panel_type;
41 find_section(struct bdb_header *bdb, int section_id)
45 u16 total, current_size;
48 /* skip to first section */
49 index += bdb->header_size;
50 total = bdb->bdb_size;
52 /* walk the sections looking for section_id */
53 while (index < total) {
54 current_id = *(base + index);
56 current_size = *((u16 *)(base + index));
58 if (current_id == section_id)
60 index += current_size;
67 get_blocksize(void *p)
69 u16 *block_ptr, block_size;
71 block_ptr = (u16 *)((char *)p - 2);
72 block_size = *block_ptr;
77 fill_detail_timing_data(struct drm_display_mode *panel_fixed_mode,
78 const struct lvds_dvo_timing *dvo_timing)
80 panel_fixed_mode->hdisplay = (dvo_timing->hactive_hi << 8) |
81 dvo_timing->hactive_lo;
82 panel_fixed_mode->hsync_start = panel_fixed_mode->hdisplay +
83 ((dvo_timing->hsync_off_hi << 8) | dvo_timing->hsync_off_lo);
84 panel_fixed_mode->hsync_end = panel_fixed_mode->hsync_start +
85 dvo_timing->hsync_pulse_width;
86 panel_fixed_mode->htotal = panel_fixed_mode->hdisplay +
87 ((dvo_timing->hblank_hi << 8) | dvo_timing->hblank_lo);
89 panel_fixed_mode->vdisplay = (dvo_timing->vactive_hi << 8) |
90 dvo_timing->vactive_lo;
91 panel_fixed_mode->vsync_start = panel_fixed_mode->vdisplay +
92 dvo_timing->vsync_off;
93 panel_fixed_mode->vsync_end = panel_fixed_mode->vsync_start +
94 dvo_timing->vsync_pulse_width;
95 panel_fixed_mode->vtotal = panel_fixed_mode->vdisplay +
96 ((dvo_timing->vblank_hi << 8) | dvo_timing->vblank_lo);
97 panel_fixed_mode->clock = dvo_timing->clock * 10;
98 panel_fixed_mode->type = DRM_MODE_TYPE_PREFERRED;
100 if (dvo_timing->hsync_positive)
101 panel_fixed_mode->flags |= DRM_MODE_FLAG_PHSYNC;
103 panel_fixed_mode->flags |= DRM_MODE_FLAG_NHSYNC;
105 if (dvo_timing->vsync_positive)
106 panel_fixed_mode->flags |= DRM_MODE_FLAG_PVSYNC;
108 panel_fixed_mode->flags |= DRM_MODE_FLAG_NVSYNC;
110 /* Some VBTs have bogus h/vtotal values */
111 if (panel_fixed_mode->hsync_end > panel_fixed_mode->htotal)
112 panel_fixed_mode->htotal = panel_fixed_mode->hsync_end + 1;
113 if (panel_fixed_mode->vsync_end > panel_fixed_mode->vtotal)
114 panel_fixed_mode->vtotal = panel_fixed_mode->vsync_end + 1;
116 drm_mode_set_name(panel_fixed_mode);
120 lvds_dvo_timing_equal_size(const struct lvds_dvo_timing *a,
121 const struct lvds_dvo_timing *b)
123 if (a->hactive_hi != b->hactive_hi ||
124 a->hactive_lo != b->hactive_lo)
127 if (a->hsync_off_hi != b->hsync_off_hi ||
128 a->hsync_off_lo != b->hsync_off_lo)
131 if (a->hsync_pulse_width != b->hsync_pulse_width)
134 if (a->hblank_hi != b->hblank_hi ||
135 a->hblank_lo != b->hblank_lo)
138 if (a->vactive_hi != b->vactive_hi ||
139 a->vactive_lo != b->vactive_lo)
142 if (a->vsync_off != b->vsync_off)
145 if (a->vsync_pulse_width != b->vsync_pulse_width)
148 if (a->vblank_hi != b->vblank_hi ||
149 a->vblank_lo != b->vblank_lo)
155 static const struct lvds_dvo_timing *
156 get_lvds_dvo_timing(const struct bdb_lvds_lfp_data *lvds_lfp_data,
157 const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs,
161 * the size of fp_timing varies on the different platform.
162 * So calculate the DVO timing relative offset in LVDS data
163 * entry to get the DVO timing entry
167 lvds_lfp_data_ptrs->ptr[1].dvo_timing_offset -
168 lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset;
169 int dvo_timing_offset =
170 lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset -
171 lvds_lfp_data_ptrs->ptr[0].fp_timing_offset;
172 const char *entry = (const char *)lvds_lfp_data->data +
173 lfp_data_size * index;
175 return (const struct lvds_dvo_timing *)(entry + dvo_timing_offset);
178 /* get lvds_fp_timing entry
179 * this function may return NULL if the corresponding entry is invalid
181 static const struct lvds_fp_timing *
182 get_lvds_fp_timing(const struct bdb_header *bdb,
183 const struct bdb_lvds_lfp_data *data,
184 const struct bdb_lvds_lfp_data_ptrs *ptrs,
187 size_t data_ofs = (const u8 *)data - (const u8 *)bdb;
188 u16 data_size = ((const u16 *)data)[-1]; /* stored in header */
191 if (index >= DRM_ARRAY_SIZE(ptrs->ptr))
193 ofs = ptrs->ptr[index].fp_timing_offset;
194 if (ofs < data_ofs ||
195 ofs + sizeof(struct lvds_fp_timing) > data_ofs + data_size)
197 return (const struct lvds_fp_timing *)((const u8 *)bdb + ofs);
200 /* Try to find integrated panel data */
202 parse_lfp_panel_data(struct drm_i915_private *dev_priv,
203 struct bdb_header *bdb)
205 const struct bdb_lvds_options *lvds_options;
206 const struct bdb_lvds_lfp_data *lvds_lfp_data;
207 const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs;
208 const struct lvds_dvo_timing *panel_dvo_timing;
209 const struct lvds_fp_timing *fp_timing;
210 struct drm_display_mode *panel_fixed_mode;
213 lvds_options = find_section(bdb, BDB_LVDS_OPTIONS);
217 dev_priv->lvds_dither = lvds_options->pixel_dither;
218 if (lvds_options->panel_type == 0xff)
221 panel_type = lvds_options->panel_type;
223 lvds_lfp_data = find_section(bdb, BDB_LVDS_LFP_DATA);
227 lvds_lfp_data_ptrs = find_section(bdb, BDB_LVDS_LFP_DATA_PTRS);
228 if (!lvds_lfp_data_ptrs)
231 dev_priv->lvds_vbt = 1;
233 panel_dvo_timing = get_lvds_dvo_timing(lvds_lfp_data,
235 lvds_options->panel_type);
237 panel_fixed_mode = malloc(sizeof(*panel_fixed_mode), DRM_MEM_KMS,
240 fill_detail_timing_data(panel_fixed_mode, panel_dvo_timing);
242 dev_priv->lfp_lvds_vbt_mode = panel_fixed_mode;
244 DRM_DEBUG_KMS("Found panel mode in BIOS VBT tables:\n");
245 drm_mode_debug_printmodeline(panel_fixed_mode);
248 * Iterate over the LVDS panel timing info to find the lowest clock
249 * for the native resolution.
251 downclock = panel_dvo_timing->clock;
252 for (i = 0; i < 16; i++) {
253 const struct lvds_dvo_timing *dvo_timing;
255 dvo_timing = get_lvds_dvo_timing(lvds_lfp_data,
258 if (lvds_dvo_timing_equal_size(dvo_timing, panel_dvo_timing) &&
259 dvo_timing->clock < downclock)
260 downclock = dvo_timing->clock;
263 if (downclock < panel_dvo_timing->clock && i915_lvds_downclock) {
264 dev_priv->lvds_downclock_avail = 1;
265 dev_priv->lvds_downclock = downclock * 10;
266 DRM_DEBUG("LVDS downclock is found in VBT. "
267 "Normal Clock %dKHz, downclock %dKHz\n",
268 panel_fixed_mode->clock, 10 * downclock);
271 fp_timing = get_lvds_fp_timing(bdb, lvds_lfp_data,
273 lvds_options->panel_type);
275 /* check the resolution, just to be sure */
276 if (fp_timing->x_res == panel_fixed_mode->hdisplay &&
277 fp_timing->y_res == panel_fixed_mode->vdisplay) {
278 dev_priv->bios_lvds_val = fp_timing->lvds_reg_val;
279 DRM_DEBUG_KMS("VBT initial LVDS value %x\n",
280 dev_priv->bios_lvds_val);
285 /* Try to find sdvo panel data */
287 parse_sdvo_panel_data(struct drm_i915_private *dev_priv,
288 struct bdb_header *bdb)
290 struct lvds_dvo_timing *dvo_timing;
291 struct drm_display_mode *panel_fixed_mode;
294 index = i915_vbt_sdvo_panel_type;
296 DRM_DEBUG_KMS("Ignore SDVO panel mode from BIOS VBT tables.\n");
301 struct bdb_sdvo_lvds_options *sdvo_lvds_options;
303 sdvo_lvds_options = find_section(bdb, BDB_SDVO_LVDS_OPTIONS);
304 if (!sdvo_lvds_options)
307 index = sdvo_lvds_options->panel_type;
310 dvo_timing = find_section(bdb, BDB_SDVO_PANEL_DTDS);
314 panel_fixed_mode = malloc(sizeof(*panel_fixed_mode), DRM_MEM_KMS,
317 fill_detail_timing_data(panel_fixed_mode, dvo_timing + index);
319 dev_priv->sdvo_lvds_vbt_mode = panel_fixed_mode;
321 DRM_DEBUG_KMS("Found SDVO panel mode in BIOS VBT tables:\n");
322 drm_mode_debug_printmodeline(panel_fixed_mode);
325 static int intel_bios_ssc_frequency(struct drm_device *dev,
328 switch (INTEL_INFO(dev)->gen) {
330 return alternate ? 66 : 48;
333 return alternate ? 100 : 96;
335 return alternate ? 100 : 120;
340 parse_general_features(struct drm_i915_private *dev_priv,
341 struct bdb_header *bdb)
343 struct drm_device *dev = dev_priv->dev;
344 struct bdb_general_features *general;
346 general = find_section(bdb, BDB_GENERAL_FEATURES);
348 dev_priv->int_tv_support = general->int_tv_support;
349 dev_priv->int_crt_support = general->int_crt_support;
350 dev_priv->lvds_use_ssc = general->enable_ssc;
351 dev_priv->lvds_ssc_freq =
352 intel_bios_ssc_frequency(dev, general->ssc_freq);
353 dev_priv->display_clock_mode = general->display_clock_mode;
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\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);
364 parse_general_definitions(struct drm_i915_private *dev_priv,
365 struct bdb_header *bdb)
367 struct bdb_general_definitions *general;
369 general = find_section(bdb, BDB_GENERAL_DEFINITIONS);
371 u16 block_size = get_blocksize(general);
372 if (block_size >= sizeof(*general)) {
373 int bus_pin = general->crt_ddc_gmbus_pin;
374 DRM_DEBUG_KMS("crt_ddc_bus_pin: %d\n", bus_pin);
375 if (intel_gmbus_is_port_valid(bus_pin))
376 dev_priv->crt_ddc_pin = bus_pin;
378 DRM_DEBUG_KMS("BDB_GD too small (%d). Invalid.\n",
385 parse_sdvo_device_mapping(struct drm_i915_private *dev_priv,
386 struct bdb_header *bdb)
388 struct sdvo_device_mapping *p_mapping;
389 struct bdb_general_definitions *p_defs;
390 struct child_device_config *p_child;
391 int i, child_device_num, count;
394 p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
396 DRM_DEBUG_KMS("No general definition block is found, unable to construct sdvo mapping.\n");
399 /* judge whether the size of child device meets the requirements.
400 * If the child device size obtained from general definition block
401 * is different with sizeof(struct child_device_config), skip the
402 * parsing of sdvo device info
404 if (p_defs->child_dev_size != sizeof(*p_child)) {
405 /* different child dev size . Ignore it */
406 DRM_DEBUG_KMS("different child size is found. Invalid.\n");
409 /* get the block size of general definitions */
410 block_size = get_blocksize(p_defs);
411 /* get the number of child device */
412 child_device_num = (block_size - sizeof(*p_defs)) /
415 for (i = 0; i < child_device_num; i++) {
416 p_child = &(p_defs->devices[i]);
417 if (!p_child->device_type) {
418 /* skip the device block if device type is invalid */
421 if (p_child->slave_addr != SLAVE_ADDR1 &&
422 p_child->slave_addr != SLAVE_ADDR2) {
424 * If the slave address is neither 0x70 nor 0x72,
425 * it is not a SDVO device. Skip it.
429 if (p_child->dvo_port != DEVICE_PORT_DVOB &&
430 p_child->dvo_port != DEVICE_PORT_DVOC) {
431 /* skip the incorrect SDVO port */
432 DRM_DEBUG_KMS("Incorrect SDVO port. Skip it\n");
435 DRM_DEBUG_KMS("the SDVO device with slave addr %2x is found on"
438 (p_child->dvo_port == DEVICE_PORT_DVOB) ?
440 p_mapping = &(dev_priv->sdvo_mappings[p_child->dvo_port - 1]);
441 if (!p_mapping->initialized) {
442 p_mapping->dvo_port = p_child->dvo_port;
443 p_mapping->slave_addr = p_child->slave_addr;
444 p_mapping->dvo_wiring = p_child->dvo_wiring;
445 p_mapping->ddc_pin = p_child->ddc_pin;
446 p_mapping->i2c_pin = p_child->i2c_pin;
447 p_mapping->initialized = 1;
448 DRM_DEBUG_KMS("SDVO device: dvo=%x, addr=%x, wiring=%d, ddc_pin=%d, i2c_pin=%d\n",
450 p_mapping->slave_addr,
451 p_mapping->dvo_wiring,
455 DRM_DEBUG_KMS("Maybe one SDVO port is shared by "
456 "two SDVO device.\n");
458 if (p_child->slave2_addr) {
459 /* Maybe this is a SDVO device with multiple inputs */
460 /* And the mapping info is not added */
461 DRM_DEBUG_KMS("there exists the slave2_addr. Maybe this"
462 " is a SDVO device with multiple inputs.\n");
468 /* No SDVO device info is found */
469 DRM_DEBUG_KMS("No SDVO device info is found in VBT\n");
475 parse_driver_features(struct drm_i915_private *dev_priv,
476 struct bdb_header *bdb)
478 struct drm_device *dev = dev_priv->dev;
479 struct bdb_driver_features *driver;
481 driver = find_section(bdb, BDB_DRIVER_FEATURES);
485 if (SUPPORTS_EDP(dev) &&
486 driver->lvds_config == BDB_DRIVER_FEATURE_EDP)
487 dev_priv->edp.support = 1;
489 if (driver->dual_frequency)
490 dev_priv->render_reclock_avail = true;
494 parse_edp(struct drm_i915_private *dev_priv, struct bdb_header *bdb)
497 struct edp_power_seq *edp_pps;
498 struct edp_link_params *edp_link_params;
500 edp = find_section(bdb, BDB_EDP);
502 if (SUPPORTS_EDP(dev_priv->dev) && dev_priv->edp.support) {
503 DRM_DEBUG_KMS("No eDP BDB found but eDP panel "
504 "supported, assume %dbpp panel color "
511 switch ((edp->color_depth >> (panel_type * 2)) & 3) {
513 dev_priv->edp.bpp = 18;
516 dev_priv->edp.bpp = 24;
519 dev_priv->edp.bpp = 30;
523 /* Get the eDP sequencing and link info */
524 edp_pps = &edp->power_seqs[panel_type];
525 edp_link_params = &edp->link_params[panel_type];
527 dev_priv->edp.pps = *edp_pps;
529 dev_priv->edp.rate = edp_link_params->rate ? DP_LINK_BW_2_7 :
531 switch (edp_link_params->lanes) {
533 dev_priv->edp.lanes = 1;
536 dev_priv->edp.lanes = 2;
540 dev_priv->edp.lanes = 4;
543 switch (edp_link_params->preemphasis) {
545 dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPHASIS_0;
548 dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPHASIS_3_5;
551 dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPHASIS_6;
554 dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPHASIS_9_5;
557 switch (edp_link_params->vswing) {
559 dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_400;
562 dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_600;
565 dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_800;
568 dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_1200;
574 parse_device_mapping(struct drm_i915_private *dev_priv,
575 struct bdb_header *bdb)
577 struct bdb_general_definitions *p_defs;
578 struct child_device_config *p_child, *child_dev_ptr;
579 int i, child_device_num, count;
582 p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
584 DRM_DEBUG_KMS("No general definition block is found, no devices defined.\n");
587 /* judge whether the size of child device meets the requirements.
588 * If the child device size obtained from general definition block
589 * is different with sizeof(struct child_device_config), skip the
590 * parsing of sdvo device info
592 if (p_defs->child_dev_size != sizeof(*p_child)) {
593 /* different child dev size . Ignore it */
594 DRM_DEBUG_KMS("different child size is found. Invalid.\n");
597 /* get the block size of general definitions */
598 block_size = get_blocksize(p_defs);
599 /* get the number of child device */
600 child_device_num = (block_size - sizeof(*p_defs)) /
603 /* get the number of child device that is present */
604 for (i = 0; i < child_device_num; i++) {
605 p_child = &(p_defs->devices[i]);
606 if (!p_child->device_type) {
607 /* skip the device block if device type is invalid */
613 DRM_DEBUG_KMS("no child dev is parsed from VBT\n");
616 dev_priv->child_dev = malloc(sizeof(*p_child) * count, DRM_MEM_KMS,
619 dev_priv->child_dev_num = count;
621 for (i = 0; i < child_device_num; i++) {
622 p_child = &(p_defs->devices[i]);
623 if (!p_child->device_type) {
624 /* skip the device block if device type is invalid */
627 child_dev_ptr = dev_priv->child_dev + count;
629 memcpy((void *)child_dev_ptr, (void *)p_child,
636 init_vbt_defaults(struct drm_i915_private *dev_priv)
638 struct drm_device *dev = dev_priv->dev;
640 dev_priv->crt_ddc_pin = GMBUS_PORT_VGADDC;
643 dev_priv->lvds_dither = 1;
644 dev_priv->lvds_vbt = 0;
646 /* SDVO panel data */
647 dev_priv->sdvo_lvds_vbt_mode = NULL;
649 /* general features */
650 dev_priv->int_tv_support = 1;
651 dev_priv->int_crt_support = 1;
653 /* Default to using SSC */
654 dev_priv->lvds_use_ssc = 1;
655 dev_priv->lvds_ssc_freq = intel_bios_ssc_frequency(dev, 1);
656 DRM_DEBUG_KMS("Set default to SSC at %dMHz\n", dev_priv->lvds_ssc_freq);
659 dev_priv->edp.bpp = 18;
662 static int 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;
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 ((I915_READ(PP_ON_DELAYS) == 0) && (I915_READ(PP_OFF_DELAYS) == 0)) {
772 /* Set T2 to 40ms and T5 to 200ms */
773 I915_WRITE(PP_ON_DELAYS, 0x019007d0);
775 /* Set T3 to 35ms and Tx to 200ms */
776 I915_WRITE(PP_OFF_DELAYS, 0x015e07d0);