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(const void *_bdb
, int section_id
)
42 const struct bdb_header
*bdb
= _bdb
;
43 const u8
*base
= _bdb
;
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
+ 3 < total
) {
54 current_id
= *(base
+ index
);
57 current_size
= *((const u16
*)(base
+ index
));
60 if (index
+ current_size
> total
)
63 if (current_id
== section_id
)
66 index
+= current_size
;
73 get_blocksize(const void *p
)
75 u16
*block_ptr
, block_size
;
77 block_ptr
= (u16
*)((char *)p
- 2);
78 block_size
= *block_ptr
;
83 fill_detail_timing_data(struct drm_display_mode
*panel_fixed_mode
,
84 const struct lvds_dvo_timing
*dvo_timing
)
86 panel_fixed_mode
->hdisplay
= (dvo_timing
->hactive_hi
<< 8) |
87 dvo_timing
->hactive_lo
;
88 panel_fixed_mode
->hsync_start
= panel_fixed_mode
->hdisplay
+
89 ((dvo_timing
->hsync_off_hi
<< 8) | dvo_timing
->hsync_off_lo
);
90 panel_fixed_mode
->hsync_end
= panel_fixed_mode
->hsync_start
+
91 dvo_timing
->hsync_pulse_width
;
92 panel_fixed_mode
->htotal
= panel_fixed_mode
->hdisplay
+
93 ((dvo_timing
->hblank_hi
<< 8) | dvo_timing
->hblank_lo
);
95 panel_fixed_mode
->vdisplay
= (dvo_timing
->vactive_hi
<< 8) |
96 dvo_timing
->vactive_lo
;
97 panel_fixed_mode
->vsync_start
= panel_fixed_mode
->vdisplay
+
98 dvo_timing
->vsync_off
;
99 panel_fixed_mode
->vsync_end
= panel_fixed_mode
->vsync_start
+
100 dvo_timing
->vsync_pulse_width
;
101 panel_fixed_mode
->vtotal
= panel_fixed_mode
->vdisplay
+
102 ((dvo_timing
->vblank_hi
<< 8) | dvo_timing
->vblank_lo
);
103 panel_fixed_mode
->clock
= dvo_timing
->clock
* 10;
104 panel_fixed_mode
->type
= DRM_MODE_TYPE_PREFERRED
;
106 if (dvo_timing
->hsync_positive
)
107 panel_fixed_mode
->flags
|= DRM_MODE_FLAG_PHSYNC
;
109 panel_fixed_mode
->flags
|= DRM_MODE_FLAG_NHSYNC
;
111 if (dvo_timing
->vsync_positive
)
112 panel_fixed_mode
->flags
|= DRM_MODE_FLAG_PVSYNC
;
114 panel_fixed_mode
->flags
|= DRM_MODE_FLAG_NVSYNC
;
116 /* Some VBTs have bogus h/vtotal values */
117 if (panel_fixed_mode
->hsync_end
> panel_fixed_mode
->htotal
)
118 panel_fixed_mode
->htotal
= panel_fixed_mode
->hsync_end
+ 1;
119 if (panel_fixed_mode
->vsync_end
> panel_fixed_mode
->vtotal
)
120 panel_fixed_mode
->vtotal
= panel_fixed_mode
->vsync_end
+ 1;
122 drm_mode_set_name(panel_fixed_mode
);
125 static const struct lvds_dvo_timing
*
126 get_lvds_dvo_timing(const struct bdb_lvds_lfp_data
*lvds_lfp_data
,
127 const struct bdb_lvds_lfp_data_ptrs
*lvds_lfp_data_ptrs
,
131 * the size of fp_timing varies on the different platform.
132 * So calculate the DVO timing relative offset in LVDS data
133 * entry to get the DVO timing entry
137 lvds_lfp_data_ptrs
->ptr
[1].dvo_timing_offset
-
138 lvds_lfp_data_ptrs
->ptr
[0].dvo_timing_offset
;
139 int dvo_timing_offset
=
140 lvds_lfp_data_ptrs
->ptr
[0].dvo_timing_offset
-
141 lvds_lfp_data_ptrs
->ptr
[0].fp_timing_offset
;
142 char *entry
= (char *)lvds_lfp_data
->data
+ lfp_data_size
* index
;
144 return (struct lvds_dvo_timing
*)(entry
+ dvo_timing_offset
);
147 /* get lvds_fp_timing entry
148 * this function may return NULL if the corresponding entry is invalid
150 static const struct lvds_fp_timing
*
151 get_lvds_fp_timing(const struct bdb_header
*bdb
,
152 const struct bdb_lvds_lfp_data
*data
,
153 const struct bdb_lvds_lfp_data_ptrs
*ptrs
,
156 size_t data_ofs
= (const u8
*)data
- (const u8
*)bdb
;
157 u16 data_size
= ((const u16
*)data
)[-1]; /* stored in header */
160 if (index
>= ARRAY_SIZE(ptrs
->ptr
))
162 ofs
= ptrs
->ptr
[index
].fp_timing_offset
;
163 if (ofs
< data_ofs
||
164 ofs
+ sizeof(struct lvds_fp_timing
) > data_ofs
+ data_size
)
166 return (const struct lvds_fp_timing
*)((const u8
*)bdb
+ ofs
);
169 /* Try to find integrated panel data */
171 parse_lfp_panel_data(struct drm_i915_private
*dev_priv
,
172 const struct bdb_header
*bdb
)
174 const struct bdb_lvds_options
*lvds_options
;
175 const struct bdb_lvds_lfp_data
*lvds_lfp_data
;
176 const struct bdb_lvds_lfp_data_ptrs
*lvds_lfp_data_ptrs
;
177 const struct lvds_dvo_timing
*panel_dvo_timing
;
178 const struct lvds_fp_timing
*fp_timing
;
179 struct drm_display_mode
*panel_fixed_mode
;
182 lvds_options
= find_section(bdb
, BDB_LVDS_OPTIONS
);
186 dev_priv
->vbt
.lvds_dither
= lvds_options
->pixel_dither
;
187 if (lvds_options
->panel_type
== 0xff)
190 panel_type
= lvds_options
->panel_type
;
192 drrs_mode
= (lvds_options
->dps_panel_type_bits
193 >> (panel_type
* 2)) & MODE_MASK
;
195 * VBT has static DRRS = 0 and seamless DRRS = 2.
196 * The below piece of code is required to adjust vbt.drrs_type
197 * to match the enum drrs_support_type.
201 dev_priv
->vbt
.drrs_type
= STATIC_DRRS_SUPPORT
;
202 DRM_DEBUG_KMS("DRRS supported mode is static\n");
205 dev_priv
->vbt
.drrs_type
= SEAMLESS_DRRS_SUPPORT
;
206 DRM_DEBUG_KMS("DRRS supported mode is seamless\n");
209 dev_priv
->vbt
.drrs_type
= DRRS_NOT_SUPPORTED
;
210 DRM_DEBUG_KMS("DRRS not supported (VBT input)\n");
214 lvds_lfp_data
= find_section(bdb
, BDB_LVDS_LFP_DATA
);
218 lvds_lfp_data_ptrs
= find_section(bdb
, BDB_LVDS_LFP_DATA_PTRS
);
219 if (!lvds_lfp_data_ptrs
)
222 dev_priv
->vbt
.lvds_vbt
= 1;
224 panel_dvo_timing
= get_lvds_dvo_timing(lvds_lfp_data
,
226 lvds_options
->panel_type
);
228 panel_fixed_mode
= kzalloc(sizeof(*panel_fixed_mode
), GFP_KERNEL
);
229 if (!panel_fixed_mode
)
232 fill_detail_timing_data(panel_fixed_mode
, panel_dvo_timing
);
234 dev_priv
->vbt
.lfp_lvds_vbt_mode
= panel_fixed_mode
;
236 DRM_DEBUG_KMS("Found panel mode in BIOS VBT tables:\n");
237 drm_mode_debug_printmodeline(panel_fixed_mode
);
239 fp_timing
= get_lvds_fp_timing(bdb
, lvds_lfp_data
,
241 lvds_options
->panel_type
);
243 /* check the resolution, just to be sure */
244 if (fp_timing
->x_res
== panel_fixed_mode
->hdisplay
&&
245 fp_timing
->y_res
== panel_fixed_mode
->vdisplay
) {
246 dev_priv
->vbt
.bios_lvds_val
= fp_timing
->lvds_reg_val
;
247 DRM_DEBUG_KMS("VBT initial LVDS value %x\n",
248 dev_priv
->vbt
.bios_lvds_val
);
254 parse_lfp_backlight(struct drm_i915_private
*dev_priv
,
255 const struct bdb_header
*bdb
)
257 const struct bdb_lfp_backlight_data
*backlight_data
;
258 const struct bdb_lfp_backlight_data_entry
*entry
;
260 backlight_data
= find_section(bdb
, BDB_LVDS_BACKLIGHT
);
264 if (backlight_data
->entry_size
!= sizeof(backlight_data
->data
[0])) {
265 DRM_DEBUG_KMS("Unsupported backlight data entry size %u\n",
266 backlight_data
->entry_size
);
270 entry
= &backlight_data
->data
[panel_type
];
272 dev_priv
->vbt
.backlight
.present
= entry
->type
== BDB_BACKLIGHT_TYPE_PWM
;
273 if (!dev_priv
->vbt
.backlight
.present
) {
274 DRM_DEBUG_KMS("PWM backlight not present in VBT (type %u)\n",
279 dev_priv
->vbt
.backlight
.pwm_freq_hz
= entry
->pwm_freq_hz
;
280 dev_priv
->vbt
.backlight
.active_low_pwm
= entry
->active_low_pwm
;
281 dev_priv
->vbt
.backlight
.min_brightness
= entry
->min_brightness
;
282 DRM_DEBUG_KMS("VBT backlight PWM modulation frequency %u Hz, "
283 "active %s, min brightness %u, level %u\n",
284 dev_priv
->vbt
.backlight
.pwm_freq_hz
,
285 dev_priv
->vbt
.backlight
.active_low_pwm
? "low" : "high",
286 dev_priv
->vbt
.backlight
.min_brightness
,
287 backlight_data
->level
[panel_type
]);
290 /* Try to find sdvo panel data */
292 parse_sdvo_panel_data(struct drm_i915_private
*dev_priv
,
293 const struct bdb_header
*bdb
)
295 const struct lvds_dvo_timing
*dvo_timing
;
296 struct drm_display_mode
*panel_fixed_mode
;
299 index
= i915
.vbt_sdvo_panel_type
;
301 DRM_DEBUG_KMS("Ignore SDVO panel mode from BIOS VBT tables.\n");
306 const struct bdb_sdvo_lvds_options
*sdvo_lvds_options
;
308 sdvo_lvds_options
= find_section(bdb
, BDB_SDVO_LVDS_OPTIONS
);
309 if (!sdvo_lvds_options
)
312 index
= sdvo_lvds_options
->panel_type
;
315 dvo_timing
= find_section(bdb
, BDB_SDVO_PANEL_DTDS
);
319 panel_fixed_mode
= kzalloc(sizeof(*panel_fixed_mode
), GFP_KERNEL
);
320 if (!panel_fixed_mode
)
323 fill_detail_timing_data(panel_fixed_mode
, dvo_timing
+ index
);
325 dev_priv
->vbt
.sdvo_lvds_vbt_mode
= panel_fixed_mode
;
327 DRM_DEBUG_KMS("Found SDVO panel mode in BIOS VBT tables:\n");
328 drm_mode_debug_printmodeline(panel_fixed_mode
);
331 static int intel_bios_ssc_frequency(struct drm_device
*dev
,
334 switch (INTEL_INFO(dev
)->gen
) {
336 return alternate
? 66667 : 48000;
339 return alternate
? 100000 : 96000;
341 return alternate
? 100000 : 120000;
346 parse_general_features(struct drm_i915_private
*dev_priv
,
347 const struct bdb_header
*bdb
)
349 struct drm_device
*dev
= dev_priv
->dev
;
350 const struct bdb_general_features
*general
;
352 general
= find_section(bdb
, BDB_GENERAL_FEATURES
);
354 dev_priv
->vbt
.int_tv_support
= general
->int_tv_support
;
355 dev_priv
->vbt
.int_crt_support
= general
->int_crt_support
;
356 dev_priv
->vbt
.lvds_use_ssc
= general
->enable_ssc
;
357 dev_priv
->vbt
.lvds_ssc_freq
=
358 intel_bios_ssc_frequency(dev
, general
->ssc_freq
);
359 dev_priv
->vbt
.display_clock_mode
= general
->display_clock_mode
;
360 dev_priv
->vbt
.fdi_rx_polarity_inverted
= general
->fdi_rx_polarity_inverted
;
361 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",
362 dev_priv
->vbt
.int_tv_support
,
363 dev_priv
->vbt
.int_crt_support
,
364 dev_priv
->vbt
.lvds_use_ssc
,
365 dev_priv
->vbt
.lvds_ssc_freq
,
366 dev_priv
->vbt
.display_clock_mode
,
367 dev_priv
->vbt
.fdi_rx_polarity_inverted
);
372 parse_general_definitions(struct drm_i915_private
*dev_priv
,
373 const struct bdb_header
*bdb
)
375 const struct bdb_general_definitions
*general
;
377 general
= find_section(bdb
, BDB_GENERAL_DEFINITIONS
);
379 u16 block_size
= get_blocksize(general
);
380 if (block_size
>= sizeof(*general
)) {
381 int bus_pin
= general
->crt_ddc_gmbus_pin
;
382 DRM_DEBUG_KMS("crt_ddc_bus_pin: %d\n", bus_pin
);
383 if (intel_gmbus_is_valid_pin(dev_priv
, bus_pin
))
384 dev_priv
->vbt
.crt_ddc_pin
= bus_pin
;
386 DRM_DEBUG_KMS("BDB_GD too small (%d). Invalid.\n",
392 static const union child_device_config
*
393 child_device_ptr(const struct bdb_general_definitions
*p_defs
, int i
)
395 return (const void *) &p_defs
->devices
[i
* p_defs
->child_dev_size
];
399 parse_sdvo_device_mapping(struct drm_i915_private
*dev_priv
,
400 const struct bdb_header
*bdb
)
402 struct sdvo_device_mapping
*p_mapping
;
403 const struct bdb_general_definitions
*p_defs
;
404 const union child_device_config
*p_child
;
405 int i
, child_device_num
, count
;
408 p_defs
= find_section(bdb
, BDB_GENERAL_DEFINITIONS
);
410 DRM_DEBUG_KMS("No general definition block is found, unable to construct sdvo mapping.\n");
413 /* judge whether the size of child device meets the requirements.
414 * If the child device size obtained from general definition block
415 * is different with sizeof(struct child_device_config), skip the
416 * parsing of sdvo device info
418 if (p_defs
->child_dev_size
!= sizeof(*p_child
)) {
419 /* different child dev size . Ignore it */
420 DRM_DEBUG_KMS("different child size is found. Invalid.\n");
423 /* get the block size of general definitions */
424 block_size
= get_blocksize(p_defs
);
425 /* get the number of child device */
426 child_device_num
= (block_size
- sizeof(*p_defs
)) /
427 p_defs
->child_dev_size
;
429 for (i
= 0; i
< child_device_num
; i
++) {
430 p_child
= child_device_ptr(p_defs
, i
);
431 if (!p_child
->old
.device_type
) {
432 /* skip the device block if device type is invalid */
435 if (p_child
->old
.slave_addr
!= SLAVE_ADDR1
&&
436 p_child
->old
.slave_addr
!= SLAVE_ADDR2
) {
438 * If the slave address is neither 0x70 nor 0x72,
439 * it is not a SDVO device. Skip it.
443 if (p_child
->old
.dvo_port
!= DEVICE_PORT_DVOB
&&
444 p_child
->old
.dvo_port
!= DEVICE_PORT_DVOC
) {
445 /* skip the incorrect SDVO port */
446 DRM_DEBUG_KMS("Incorrect SDVO port. Skip it\n");
449 DRM_DEBUG_KMS("the SDVO device with slave addr %2x is found on"
451 p_child
->old
.slave_addr
,
452 (p_child
->old
.dvo_port
== DEVICE_PORT_DVOB
) ?
454 p_mapping
= &(dev_priv
->sdvo_mappings
[p_child
->old
.dvo_port
- 1]);
455 if (!p_mapping
->initialized
) {
456 p_mapping
->dvo_port
= p_child
->old
.dvo_port
;
457 p_mapping
->slave_addr
= p_child
->old
.slave_addr
;
458 p_mapping
->dvo_wiring
= p_child
->old
.dvo_wiring
;
459 p_mapping
->ddc_pin
= p_child
->old
.ddc_pin
;
460 p_mapping
->i2c_pin
= p_child
->old
.i2c_pin
;
461 p_mapping
->initialized
= 1;
462 DRM_DEBUG_KMS("SDVO device: dvo=%x, addr=%x, wiring=%d, ddc_pin=%d, i2c_pin=%d\n",
464 p_mapping
->slave_addr
,
465 p_mapping
->dvo_wiring
,
469 DRM_DEBUG_KMS("Maybe one SDVO port is shared by "
470 "two SDVO device.\n");
472 if (p_child
->old
.slave2_addr
) {
473 /* Maybe this is a SDVO device with multiple inputs */
474 /* And the mapping info is not added */
475 DRM_DEBUG_KMS("there exists the slave2_addr. Maybe this"
476 " is a SDVO device with multiple inputs.\n");
482 /* No SDVO device info is found */
483 DRM_DEBUG_KMS("No SDVO device info is found in VBT\n");
489 parse_driver_features(struct drm_i915_private
*dev_priv
,
490 const struct bdb_header
*bdb
)
492 const struct bdb_driver_features
*driver
;
494 driver
= find_section(bdb
, BDB_DRIVER_FEATURES
);
498 if (driver
->lvds_config
== BDB_DRIVER_FEATURE_EDP
)
499 dev_priv
->vbt
.edp_support
= 1;
501 if (driver
->dual_frequency
)
502 dev_priv
->render_reclock_avail
= true;
504 DRM_DEBUG_KMS("DRRS State Enabled:%d\n", driver
->drrs_enabled
);
506 * If DRRS is not supported, drrs_type has to be set to 0.
507 * This is because, VBT is configured in such a way that
508 * static DRRS is 0 and DRRS not supported is represented by
509 * driver->drrs_enabled=false
511 if (!driver
->drrs_enabled
)
512 dev_priv
->vbt
.drrs_type
= DRRS_NOT_SUPPORTED
;
516 parse_edp(struct drm_i915_private
*dev_priv
, const struct bdb_header
*bdb
)
518 const struct bdb_edp
*edp
;
519 const struct edp_power_seq
*edp_pps
;
520 const struct edp_link_params
*edp_link_params
;
522 edp
= find_section(bdb
, BDB_EDP
);
524 if (dev_priv
->vbt
.edp_support
)
525 DRM_DEBUG_KMS("No eDP BDB found but eDP panel supported.\n");
529 switch ((edp
->color_depth
>> (panel_type
* 2)) & 3) {
531 dev_priv
->vbt
.edp_bpp
= 18;
534 dev_priv
->vbt
.edp_bpp
= 24;
537 dev_priv
->vbt
.edp_bpp
= 30;
541 /* Get the eDP sequencing and link info */
542 edp_pps
= &edp
->power_seqs
[panel_type
];
543 edp_link_params
= &edp
->link_params
[panel_type
];
545 dev_priv
->vbt
.edp_pps
= *edp_pps
;
547 switch (edp_link_params
->rate
) {
549 dev_priv
->vbt
.edp_rate
= DP_LINK_BW_1_62
;
552 dev_priv
->vbt
.edp_rate
= DP_LINK_BW_2_7
;
555 DRM_DEBUG_KMS("VBT has unknown eDP link rate value %u\n",
556 edp_link_params
->rate
);
560 switch (edp_link_params
->lanes
) {
562 dev_priv
->vbt
.edp_lanes
= 1;
565 dev_priv
->vbt
.edp_lanes
= 2;
568 dev_priv
->vbt
.edp_lanes
= 4;
571 DRM_DEBUG_KMS("VBT has unknown eDP lane count value %u\n",
572 edp_link_params
->lanes
);
576 switch (edp_link_params
->preemphasis
) {
577 case EDP_PREEMPHASIS_NONE
:
578 dev_priv
->vbt
.edp_preemphasis
= DP_TRAIN_PRE_EMPH_LEVEL_0
;
580 case EDP_PREEMPHASIS_3_5dB
:
581 dev_priv
->vbt
.edp_preemphasis
= DP_TRAIN_PRE_EMPH_LEVEL_1
;
583 case EDP_PREEMPHASIS_6dB
:
584 dev_priv
->vbt
.edp_preemphasis
= DP_TRAIN_PRE_EMPH_LEVEL_2
;
586 case EDP_PREEMPHASIS_9_5dB
:
587 dev_priv
->vbt
.edp_preemphasis
= DP_TRAIN_PRE_EMPH_LEVEL_3
;
590 DRM_DEBUG_KMS("VBT has unknown eDP pre-emphasis value %u\n",
591 edp_link_params
->preemphasis
);
595 switch (edp_link_params
->vswing
) {
596 case EDP_VSWING_0_4V
:
597 dev_priv
->vbt
.edp_vswing
= DP_TRAIN_VOLTAGE_SWING_LEVEL_0
;
599 case EDP_VSWING_0_6V
:
600 dev_priv
->vbt
.edp_vswing
= DP_TRAIN_VOLTAGE_SWING_LEVEL_1
;
602 case EDP_VSWING_0_8V
:
603 dev_priv
->vbt
.edp_vswing
= DP_TRAIN_VOLTAGE_SWING_LEVEL_2
;
605 case EDP_VSWING_1_2V
:
606 dev_priv
->vbt
.edp_vswing
= DP_TRAIN_VOLTAGE_SWING_LEVEL_3
;
609 DRM_DEBUG_KMS("VBT has unknown eDP voltage swing value %u\n",
610 edp_link_params
->vswing
);
614 if (bdb
->version
>= 173) {
617 /* Don't read from VBT if module parameter has valid value*/
618 if (i915
.edp_vswing
) {
619 dev_priv
->edp_low_vswing
= i915
.edp_vswing
== 1;
621 vswing
= (edp
->edp_vswing_preemph
>> (panel_type
* 4)) & 0xF;
622 dev_priv
->edp_low_vswing
= vswing
== 0;
628 parse_psr(struct drm_i915_private
*dev_priv
, const struct bdb_header
*bdb
)
630 const struct bdb_psr
*psr
;
631 const struct psr_table
*psr_table
;
633 psr
= find_section(bdb
, BDB_PSR
);
635 DRM_DEBUG_KMS("No PSR BDB found.\n");
639 psr_table
= &psr
->psr_table
[panel_type
];
641 dev_priv
->vbt
.psr
.full_link
= psr_table
->full_link
;
642 dev_priv
->vbt
.psr
.require_aux_wakeup
= psr_table
->require_aux_to_wakeup
;
644 /* Allowed VBT values goes from 0 to 15 */
645 dev_priv
->vbt
.psr
.idle_frames
= psr_table
->idle_frames
< 0 ? 0 :
646 psr_table
->idle_frames
> 15 ? 15 : psr_table
->idle_frames
;
648 switch (psr_table
->lines_to_wait
) {
650 dev_priv
->vbt
.psr
.lines_to_wait
= PSR_0_LINES_TO_WAIT
;
653 dev_priv
->vbt
.psr
.lines_to_wait
= PSR_1_LINE_TO_WAIT
;
656 dev_priv
->vbt
.psr
.lines_to_wait
= PSR_4_LINES_TO_WAIT
;
659 dev_priv
->vbt
.psr
.lines_to_wait
= PSR_8_LINES_TO_WAIT
;
662 DRM_DEBUG_KMS("VBT has unknown PSR lines to wait %u\n",
663 psr_table
->lines_to_wait
);
667 dev_priv
->vbt
.psr
.tp1_wakeup_time
= psr_table
->tp1_wakeup_time
;
668 dev_priv
->vbt
.psr
.tp2_tp3_wakeup_time
= psr_table
->tp2_tp3_wakeup_time
;
671 static u8
*goto_next_sequence(u8
*data
, int *size
)
679 /* goto first element */
683 case MIPI_SEQ_ELEM_SEND_PKT
:
685 * skip by this element payload size
686 * skip elem id, command flag and data type
693 len
= *((u16
*)data
);
700 data
= data
+ 2 + len
;
702 case MIPI_SEQ_ELEM_DELAY
:
703 /* skip by elem id, and delay is 4 bytes */
710 case MIPI_SEQ_ELEM_GPIO
:
718 DRM_ERROR("Unknown element\n");
722 /* end of sequence ? */
727 /* goto next sequence or end of block byte */
733 /* update amount of data left for the sequence block to be parsed */
739 parse_mipi(struct drm_i915_private
*dev_priv
, const struct bdb_header
*bdb
)
741 const struct bdb_mipi_config
*start
;
742 const struct bdb_mipi_sequence
*sequence
;
743 const struct mipi_config
*config
;
744 const struct mipi_pps_data
*pps
;
747 int i
, panel_id
, seq_size
;
750 /* parse MIPI blocks only if LFP type is MIPI */
751 if (!dev_priv
->vbt
.has_mipi
)
754 /* Initialize this to undefined indicating no generic MIPI support */
755 dev_priv
->vbt
.dsi
.panel_id
= MIPI_DSI_UNDEFINED_PANEL_ID
;
757 /* Block #40 is already parsed and panel_fixed_mode is
758 * stored in dev_priv->lfp_lvds_vbt_mode
759 * resuse this when needed
762 /* Parse #52 for panel index used from panel_type already
765 start
= find_section(bdb
, BDB_MIPI_CONFIG
);
767 DRM_DEBUG_KMS("No MIPI config BDB found");
771 DRM_DEBUG_DRIVER("Found MIPI Config block, panel index = %d\n",
775 * get hold of the correct configuration block and pps data as per
776 * the panel_type as index
778 config
= &start
->config
[panel_type
];
779 pps
= &start
->pps
[panel_type
];
781 /* store as of now full data. Trim when we realise all is not needed */
782 dev_priv
->vbt
.dsi
.config
= kmemdup(config
, sizeof(struct mipi_config
), GFP_KERNEL
);
783 if (!dev_priv
->vbt
.dsi
.config
)
786 dev_priv
->vbt
.dsi
.pps
= kmemdup(pps
, sizeof(struct mipi_pps_data
), GFP_KERNEL
);
787 if (!dev_priv
->vbt
.dsi
.pps
) {
788 kfree(dev_priv
->vbt
.dsi
.config
);
792 /* We have mandatory mipi config blocks. Initialize as generic panel */
793 dev_priv
->vbt
.dsi
.panel_id
= MIPI_DSI_GENERIC_PANEL_ID
;
795 /* Check if we have sequence block as well */
796 sequence
= find_section(bdb
, BDB_MIPI_SEQUENCE
);
798 DRM_DEBUG_KMS("No MIPI Sequence found, parsing complete\n");
802 DRM_DEBUG_DRIVER("Found MIPI sequence block\n");
804 block_size
= get_blocksize(sequence
);
807 * parse the sequence block for individual sequences
809 dev_priv
->vbt
.dsi
.seq_version
= sequence
->version
;
811 seq_data
= &sequence
->data
[0];
814 * sequence block is variable length and hence we need to parse and
815 * get the sequence data for specific panel id
817 for (i
= 0; i
< MAX_MIPI_CONFIGURATIONS
; i
++) {
818 panel_id
= *seq_data
;
819 seq_size
= *((u16
*) (seq_data
+ 1));
820 if (panel_id
== panel_type
)
823 /* skip the sequence including seq header of 3 bytes */
824 seq_data
= seq_data
+ 3 + seq_size
;
825 if ((seq_data
- &sequence
->data
[0]) > block_size
) {
826 DRM_ERROR("Sequence start is beyond sequence block size, corrupted sequence block\n");
831 if (i
== MAX_MIPI_CONFIGURATIONS
) {
832 DRM_ERROR("Sequence block detected but no valid configuration\n");
836 /* check if found sequence is completely within the sequence block
837 * just being paranoid */
838 if (seq_size
> block_size
) {
839 DRM_ERROR("Corrupted sequence/size, bailing out\n");
843 /* skip the panel id(1 byte) and seq size(2 bytes) */
844 dev_priv
->vbt
.dsi
.data
= kmemdup(seq_data
+ 3, seq_size
, GFP_KERNEL
);
845 if (!dev_priv
->vbt
.dsi
.data
)
849 * loop into the sequence data and split into multiple sequneces
850 * There are only 5 types of sequences as of now
852 data
= dev_priv
->vbt
.dsi
.data
;
853 dev_priv
->vbt
.dsi
.size
= seq_size
;
855 /* two consecutive 0x00 indicate end of all sequences */
858 if (MIPI_SEQ_MAX
> seq_id
&& seq_id
> MIPI_SEQ_UNDEFINED
) {
859 dev_priv
->vbt
.dsi
.sequence
[seq_id
] = data
;
860 DRM_DEBUG_DRIVER("Found mipi sequence - %d\n", seq_id
);
862 DRM_ERROR("undefined sequence\n");
866 /* partial parsing to skip elements */
867 data
= goto_next_sequence(data
, &seq_size
);
870 DRM_ERROR("Sequence elements going beyond block itself. Sequence block parsing failed\n");
875 break; /* end of sequence reached */
878 DRM_DEBUG_DRIVER("MIPI related vbt parsing complete\n");
881 kfree(dev_priv
->vbt
.dsi
.data
);
882 dev_priv
->vbt
.dsi
.data
= NULL
;
884 /* error during parsing so set all pointers to null
885 * because of partial parsing */
886 memset(dev_priv
->vbt
.dsi
.sequence
, 0, sizeof(dev_priv
->vbt
.dsi
.sequence
));
889 static void parse_ddi_port(struct drm_i915_private
*dev_priv
, enum port port
,
890 const struct bdb_header
*bdb
)
892 union child_device_config
*it
, *child
= NULL
;
893 struct ddi_vbt_port_info
*info
= &dev_priv
->vbt
.ddi_port_info
[port
];
894 uint8_t hdmi_level_shift
;
896 bool is_dvi
, is_hdmi
, is_dp
, is_edp
, is_crt
;
898 /* Each DDI port can have more than one value on the "DVO Port" field,
899 * so look for all the possible values for each port and abort if more
900 * than one is found. */
901 int dvo_ports
[][2] = {
902 {DVO_PORT_HDMIA
, DVO_PORT_DPA
},
903 {DVO_PORT_HDMIB
, DVO_PORT_DPB
},
904 {DVO_PORT_HDMIC
, DVO_PORT_DPC
},
905 {DVO_PORT_HDMID
, DVO_PORT_DPD
},
906 {DVO_PORT_CRT
, -1 /* Port E can only be DVO_PORT_CRT */ },
909 /* Find the child device to use, abort if more than one found. */
910 for (i
= 0; i
< dev_priv
->vbt
.child_dev_num
; i
++) {
911 it
= dev_priv
->vbt
.child_dev
+ i
;
913 for (j
= 0; j
< 2; j
++) {
914 if (dvo_ports
[port
][j
] == -1)
917 if (it
->common
.dvo_port
== dvo_ports
[port
][j
]) {
919 DRM_DEBUG_KMS("More than one child device for port %c in VBT.\n",
930 aux_channel
= child
->raw
[25];
932 is_dvi
= child
->common
.device_type
& DEVICE_TYPE_TMDS_DVI_SIGNALING
;
933 is_dp
= child
->common
.device_type
& DEVICE_TYPE_DISPLAYPORT_OUTPUT
;
934 is_crt
= child
->common
.device_type
& DEVICE_TYPE_ANALOG_OUTPUT
;
935 is_hdmi
= is_dvi
&& (child
->common
.device_type
& DEVICE_TYPE_NOT_HDMI_OUTPUT
) == 0;
936 is_edp
= is_dp
&& (child
->common
.device_type
& DEVICE_TYPE_INTERNAL_CONNECTOR
);
938 info
->supports_dvi
= is_dvi
;
939 info
->supports_hdmi
= is_hdmi
;
940 info
->supports_dp
= is_dp
;
942 DRM_DEBUG_KMS("Port %c VBT info: DP:%d HDMI:%d DVI:%d EDP:%d CRT:%d\n",
943 port_name(port
), is_dp
, is_hdmi
, is_dvi
, is_edp
, is_crt
);
945 if (is_edp
&& is_dvi
)
946 DRM_DEBUG_KMS("Internal DP port %c is TMDS compatible\n",
948 if (is_crt
&& port
!= PORT_E
)
949 DRM_DEBUG_KMS("Port %c is analog\n", port_name(port
));
950 if (is_crt
&& (is_dvi
|| is_dp
))
951 DRM_DEBUG_KMS("Analog port %c is also DP or TMDS compatible\n",
953 if (is_dvi
&& (port
== PORT_A
|| port
== PORT_E
))
954 DRM_DEBUG_KMS("Port %c is TMDS compatible\n", port_name(port
));
955 if (!is_dvi
&& !is_dp
&& !is_crt
)
956 DRM_DEBUG_KMS("Port %c is not DP/TMDS/CRT compatible\n",
958 if (is_edp
&& (port
== PORT_B
|| port
== PORT_C
|| port
== PORT_E
))
959 DRM_DEBUG_KMS("Port %c is internal DP\n", port_name(port
));
962 if (child
->common
.ddc_pin
== 0x05 && port
!= PORT_B
)
963 DRM_DEBUG_KMS("Unexpected DDC pin for port B\n");
964 if (child
->common
.ddc_pin
== 0x04 && port
!= PORT_C
)
965 DRM_DEBUG_KMS("Unexpected DDC pin for port C\n");
966 if (child
->common
.ddc_pin
== 0x06 && port
!= PORT_D
)
967 DRM_DEBUG_KMS("Unexpected DDC pin for port D\n");
971 if (aux_channel
== 0x40 && port
!= PORT_A
)
972 DRM_DEBUG_KMS("Unexpected AUX channel for port A\n");
973 if (aux_channel
== 0x10 && port
!= PORT_B
)
974 DRM_DEBUG_KMS("Unexpected AUX channel for port B\n");
975 if (aux_channel
== 0x20 && port
!= PORT_C
)
976 DRM_DEBUG_KMS("Unexpected AUX channel for port C\n");
977 if (aux_channel
== 0x30 && port
!= PORT_D
)
978 DRM_DEBUG_KMS("Unexpected AUX channel for port D\n");
981 if (bdb
->version
>= 158) {
982 /* The VBT HDMI level shift values match the table we have. */
983 hdmi_level_shift
= child
->raw
[7] & 0xF;
984 DRM_DEBUG_KMS("VBT HDMI level shift for port %c: %d\n",
987 info
->hdmi_level_shift
= hdmi_level_shift
;
991 static void parse_ddi_ports(struct drm_i915_private
*dev_priv
,
992 const struct bdb_header
*bdb
)
994 struct drm_device
*dev
= dev_priv
->dev
;
1000 if (!dev_priv
->vbt
.child_dev_num
)
1003 if (bdb
->version
< 155)
1006 for (port
= PORT_A
; port
< I915_MAX_PORTS
; port
++)
1007 parse_ddi_port(dev_priv
, port
, bdb
);
1011 parse_device_mapping(struct drm_i915_private
*dev_priv
,
1012 const struct bdb_header
*bdb
)
1014 const struct bdb_general_definitions
*p_defs
;
1015 const union child_device_config
*p_child
;
1016 union child_device_config
*child_dev_ptr
;
1017 int i
, child_device_num
, count
;
1020 p_defs
= find_section(bdb
, BDB_GENERAL_DEFINITIONS
);
1022 DRM_DEBUG_KMS("No general definition block is found, no devices defined.\n");
1025 if (p_defs
->child_dev_size
< sizeof(*p_child
)) {
1026 DRM_ERROR("General definiton block child device size is too small.\n");
1029 /* get the block size of general definitions */
1030 block_size
= get_blocksize(p_defs
);
1031 /* get the number of child device */
1032 child_device_num
= (block_size
- sizeof(*p_defs
)) /
1033 p_defs
->child_dev_size
;
1035 /* get the number of child device that is present */
1036 for (i
= 0; i
< child_device_num
; i
++) {
1037 p_child
= child_device_ptr(p_defs
, i
);
1038 if (!p_child
->common
.device_type
) {
1039 /* skip the device block if device type is invalid */
1045 DRM_DEBUG_KMS("no child dev is parsed from VBT\n");
1048 dev_priv
->vbt
.child_dev
= kcalloc(count
, sizeof(*p_child
), GFP_KERNEL
);
1049 if (!dev_priv
->vbt
.child_dev
) {
1050 DRM_DEBUG_KMS("No memory space for child device\n");
1054 dev_priv
->vbt
.child_dev_num
= count
;
1056 for (i
= 0; i
< child_device_num
; i
++) {
1057 p_child
= child_device_ptr(p_defs
, i
);
1058 if (!p_child
->common
.device_type
) {
1059 /* skip the device block if device type is invalid */
1063 if (p_child
->common
.dvo_port
>= DVO_PORT_MIPIA
1064 && p_child
->common
.dvo_port
<= DVO_PORT_MIPID
1065 &&p_child
->common
.device_type
& DEVICE_TYPE_MIPI_OUTPUT
) {
1066 DRM_DEBUG_KMS("Found MIPI as LFP\n");
1067 dev_priv
->vbt
.has_mipi
= 1;
1068 dev_priv
->vbt
.dsi
.port
= p_child
->common
.dvo_port
;
1071 child_dev_ptr
= dev_priv
->vbt
.child_dev
+ count
;
1073 memcpy(child_dev_ptr
, p_child
, sizeof(*p_child
));
1079 init_vbt_defaults(struct drm_i915_private
*dev_priv
)
1081 struct drm_device
*dev
= dev_priv
->dev
;
1084 dev_priv
->vbt
.crt_ddc_pin
= GMBUS_PIN_VGADDC
;
1086 /* Default to having backlight */
1087 dev_priv
->vbt
.backlight
.present
= true;
1089 /* LFP panel data */
1090 dev_priv
->vbt
.lvds_dither
= 1;
1091 dev_priv
->vbt
.lvds_vbt
= 0;
1093 /* SDVO panel data */
1094 dev_priv
->vbt
.sdvo_lvds_vbt_mode
= NULL
;
1096 /* general features */
1097 dev_priv
->vbt
.int_tv_support
= 1;
1098 dev_priv
->vbt
.int_crt_support
= 1;
1100 /* Default to using SSC */
1101 dev_priv
->vbt
.lvds_use_ssc
= 1;
1103 * Core/SandyBridge/IvyBridge use alternative (120MHz) reference
1106 dev_priv
->vbt
.lvds_ssc_freq
= intel_bios_ssc_frequency(dev
,
1107 !HAS_PCH_SPLIT(dev
));
1108 DRM_DEBUG_KMS("Set default to SSC at %d kHz\n", dev_priv
->vbt
.lvds_ssc_freq
);
1110 for (port
= PORT_A
; port
< I915_MAX_PORTS
; port
++) {
1111 struct ddi_vbt_port_info
*info
=
1112 &dev_priv
->vbt
.ddi_port_info
[port
];
1114 info
->hdmi_level_shift
= HDMI_LEVEL_SHIFT_UNKNOWN
;
1116 info
->supports_dvi
= (port
!= PORT_A
&& port
!= PORT_E
);
1117 info
->supports_hdmi
= info
->supports_dvi
;
1118 info
->supports_dp
= (port
!= PORT_E
);
1122 static int intel_no_opregion_vbt_callback(const struct dmi_system_id
*id
)
1124 DRM_DEBUG_KMS("Falling back to manually reading VBT from "
1125 "VBIOS ROM for %s\n",
1130 static const struct dmi_system_id intel_no_opregion_vbt
[] = {
1132 .callback
= intel_no_opregion_vbt_callback
,
1133 .ident
= "ThinkCentre A57",
1135 DMI_MATCH(DMI_SYS_VENDOR
, "LENOVO"),
1136 DMI_MATCH(DMI_PRODUCT_NAME
, "97027RG"),
1142 static const struct bdb_header
*validate_vbt(const void __iomem
*_base
,
1144 const void __iomem
*_vbt
,
1148 * This is the one place where we explicitly discard the address space
1149 * (__iomem) of the BIOS/VBT. (And this will cause a sparse complaint.)
1150 * From now on everything is based on 'base', and treated as regular
1153 const void *base
= (const void *) _base
;
1154 size_t offset
= _vbt
- _base
;
1155 const struct vbt_header
*vbt
= base
+ offset
;
1156 const struct bdb_header
*bdb
;
1158 if (offset
+ sizeof(struct vbt_header
) > size
) {
1159 DRM_DEBUG_DRIVER("VBT header incomplete\n");
1163 if (memcmp(vbt
->signature
, "$VBT", 4)) {
1164 DRM_DEBUG_DRIVER("VBT invalid signature\n");
1168 offset
+= vbt
->bdb_offset
;
1169 if (offset
+ sizeof(struct bdb_header
) > size
) {
1170 DRM_DEBUG_DRIVER("BDB header incomplete\n");
1174 bdb
= base
+ offset
;
1175 if (offset
+ bdb
->bdb_size
> size
) {
1176 DRM_DEBUG_DRIVER("BDB incomplete\n");
1180 DRM_DEBUG_KMS("Using VBT from %s: %20s\n",
1181 source
, vbt
->signature
);
1185 static const struct bdb_header
*find_vbt(void __iomem
*bios
, size_t size
)
1187 const struct bdb_header
*bdb
= NULL
;
1190 /* Scour memory looking for the VBT signature. */
1191 for (i
= 0; i
+ 4 < size
; i
++) {
1192 if (ioread32(bios
+ i
) == *((const u32
*) "$VBT")) {
1193 bdb
= validate_vbt(bios
, size
, bios
+ i
, "PCI ROM");
1202 * intel_parse_bios - find VBT and initialize settings from the BIOS
1205 * Loads the Video BIOS and checks that the VBT exists. Sets scratch registers
1206 * to appropriate values.
1208 * Returns 0 on success, nonzero on failure.
1211 intel_parse_bios(struct drm_device
*dev
)
1213 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1214 struct pci_dev
*pdev
= dev
->pdev
;
1215 const struct bdb_header
*bdb
= NULL
;
1216 u8 __iomem
*bios
= NULL
;
1218 if (HAS_PCH_NOP(dev
))
1221 init_vbt_defaults(dev_priv
);
1223 /* XXX Should this validation be moved to intel_opregion.c? */
1224 if (!dmi_check_system(intel_no_opregion_vbt
) && dev_priv
->opregion
.vbt
)
1225 bdb
= validate_vbt(dev_priv
->opregion
.header
, OPREGION_SIZE
,
1226 dev_priv
->opregion
.vbt
, "OpRegion");
1231 bios
= pci_map_rom(pdev
, &size
);
1235 bdb
= find_vbt(bios
, size
);
1237 pci_unmap_rom(pdev
, bios
);
1242 /* Grab useful general definitions */
1243 parse_general_features(dev_priv
, bdb
);
1244 parse_general_definitions(dev_priv
, bdb
);
1245 parse_lfp_panel_data(dev_priv
, bdb
);
1246 parse_lfp_backlight(dev_priv
, bdb
);
1247 parse_sdvo_panel_data(dev_priv
, bdb
);
1248 parse_sdvo_device_mapping(dev_priv
, bdb
);
1249 parse_device_mapping(dev_priv
, bdb
);
1250 parse_driver_features(dev_priv
, bdb
);
1251 parse_edp(dev_priv
, bdb
);
1252 parse_psr(dev_priv
, bdb
);
1253 parse_mipi(dev_priv
, bdb
);
1254 parse_ddi_ports(dev_priv
, bdb
);
1257 pci_unmap_rom(pdev
, bios
);
1262 /* Ensure that vital registers have been initialised, even if the BIOS
1263 * is absent or just failing to do its job.
1265 void intel_setup_bios(struct drm_device
*dev
)
1267 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1269 /* Set the Panel Power On/Off timings if uninitialized. */
1270 if (!HAS_PCH_SPLIT(dev
) &&
1271 I915_READ(PP_ON_DELAYS
) == 0 && I915_READ(PP_OFF_DELAYS
) == 0) {
1272 /* Set T2 to 40ms and T5 to 200ms */
1273 I915_WRITE(PP_ON_DELAYS
, 0x019007d0);
1275 /* Set T3 to 35ms and Tx to 200ms */
1276 I915_WRITE(PP_OFF_DELAYS
, 0x015e07d0);