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1/*
2 * Copyright © 2006 Intel Corporation
3 *
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:
10 *
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
13 * Software.
14 *
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
21 * SOFTWARE.
22 *
23 * Authors:
24 * Eric Anholt <eric@anholt.net>
25 *
26 */
27#include <drm/drm_dp_helper.h>
28#include "drmP.h"
29#include "drm.h"
30#include "i915_drm.h"
31#include "i915_drv.h"
32#include "intel_bios.h"
33
34#define SLAVE_ADDR1 0x70
35#define SLAVE_ADDR2 0x72
36
37static int panel_type;
38
39static void *
40find_section(struct bdb_header *bdb, int section_id)
41{
42 u8 *base = (u8 *)bdb;
43 int index = 0;
44 u16 total, current_size;
45 u8 current_id;
46
47 /* skip to first section */
48 index += bdb->header_size;
49 total = bdb->bdb_size;
50
51 /* walk the sections looking for section_id */
52 while (index < total) {
53 current_id = *(base + index);
54 index++;
55 current_size = *((u16 *)(base + index));
56 index += 2;
57 if (current_id == section_id)
58 return base + index;
59 index += current_size;
60 }
61
62 return NULL;
63}
64
65static u16
66get_blocksize(void *p)
67{
68 u16 *block_ptr, block_size;
69
70 block_ptr = (u16 *)((char *)p - 2);
71 block_size = *block_ptr;
72 return block_size;
73}
74
75static void
76fill_detail_timing_data(struct drm_display_mode *panel_fixed_mode,
77 const struct lvds_dvo_timing *dvo_timing)
78{
79 panel_fixed_mode->hdisplay = (dvo_timing->hactive_hi << 8) |
80 dvo_timing->hactive_lo;
81 panel_fixed_mode->hsync_start = panel_fixed_mode->hdisplay +
82 ((dvo_timing->hsync_off_hi << 8) | dvo_timing->hsync_off_lo);
83 panel_fixed_mode->hsync_end = panel_fixed_mode->hsync_start +
84 dvo_timing->hsync_pulse_width;
85 panel_fixed_mode->htotal = panel_fixed_mode->hdisplay +
86 ((dvo_timing->hblank_hi << 8) | dvo_timing->hblank_lo);
87
88 panel_fixed_mode->vdisplay = (dvo_timing->vactive_hi << 8) |
89 dvo_timing->vactive_lo;
90 panel_fixed_mode->vsync_start = panel_fixed_mode->vdisplay +
91 dvo_timing->vsync_off;
92 panel_fixed_mode->vsync_end = panel_fixed_mode->vsync_start +
93 dvo_timing->vsync_pulse_width;
94 panel_fixed_mode->vtotal = panel_fixed_mode->vdisplay +
95 ((dvo_timing->vblank_hi << 8) | dvo_timing->vblank_lo);
96 panel_fixed_mode->clock = dvo_timing->clock * 10;
97 panel_fixed_mode->type = DRM_MODE_TYPE_PREFERRED;
98
99 if (dvo_timing->hsync_positive)
100 panel_fixed_mode->flags |= DRM_MODE_FLAG_PHSYNC;
101 else
102 panel_fixed_mode->flags |= DRM_MODE_FLAG_NHSYNC;
103
104 if (dvo_timing->vsync_positive)
105 panel_fixed_mode->flags |= DRM_MODE_FLAG_PVSYNC;
106 else
107 panel_fixed_mode->flags |= DRM_MODE_FLAG_NVSYNC;
108
109 /* Some VBTs have bogus h/vtotal values */
110 if (panel_fixed_mode->hsync_end > panel_fixed_mode->htotal)
111 panel_fixed_mode->htotal = panel_fixed_mode->hsync_end + 1;
112 if (panel_fixed_mode->vsync_end > panel_fixed_mode->vtotal)
113 panel_fixed_mode->vtotal = panel_fixed_mode->vsync_end + 1;
114
115 drm_mode_set_name(panel_fixed_mode);
116}
117
118static bool
119lvds_dvo_timing_equal_size(const struct lvds_dvo_timing *a,
120 const struct lvds_dvo_timing *b)
121{
122 if (a->hactive_hi != b->hactive_hi ||
123 a->hactive_lo != b->hactive_lo)
124 return false;
125
126 if (a->hsync_off_hi != b->hsync_off_hi ||
127 a->hsync_off_lo != b->hsync_off_lo)
128 return false;
129
130 if (a->hsync_pulse_width != b->hsync_pulse_width)
131 return false;
132
133 if (a->hblank_hi != b->hblank_hi ||
134 a->hblank_lo != b->hblank_lo)
135 return false;
136
137 if (a->vactive_hi != b->vactive_hi ||
138 a->vactive_lo != b->vactive_lo)
139 return false;
140
141 if (a->vsync_off != b->vsync_off)
142 return false;
143
144 if (a->vsync_pulse_width != b->vsync_pulse_width)
145 return false;
146
147 if (a->vblank_hi != b->vblank_hi ||
148 a->vblank_lo != b->vblank_lo)
149 return false;
150
151 return true;
152}
153
154static const struct lvds_dvo_timing *
155get_lvds_dvo_timing(const struct bdb_lvds_lfp_data *lvds_lfp_data,
156 const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs,
157 int index)
158{
159 /*
160 * the size of fp_timing varies on the different platform.
161 * So calculate the DVO timing relative offset in LVDS data
162 * entry to get the DVO timing entry
163 */
164
165 int lfp_data_size =
166 lvds_lfp_data_ptrs->ptr[1].dvo_timing_offset -
167 lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset;
168 int dvo_timing_offset =
169 lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset -
170 lvds_lfp_data_ptrs->ptr[0].fp_timing_offset;
171 char *entry = (char *)lvds_lfp_data->data + lfp_data_size * index;
172
173 return (struct lvds_dvo_timing *)(entry + dvo_timing_offset);
174}
175
176/* Try to find integrated panel data */
177static void
178parse_lfp_panel_data(struct drm_i915_private *dev_priv,
179 struct bdb_header *bdb)
180{
181 const struct bdb_lvds_options *lvds_options;
182 const struct bdb_lvds_lfp_data *lvds_lfp_data;
183 const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs;
184 const struct lvds_dvo_timing *panel_dvo_timing;
185 struct drm_display_mode *panel_fixed_mode;
186 int i, downclock;
187
188 lvds_options = find_section(bdb, BDB_LVDS_OPTIONS);
189 if (!lvds_options)
190 return;
191
192 dev_priv->lvds_dither = lvds_options->pixel_dither;
193 if (lvds_options->panel_type == 0xff)
194 return;
195
196 panel_type = lvds_options->panel_type;
197
198 lvds_lfp_data = find_section(bdb, BDB_LVDS_LFP_DATA);
199 if (!lvds_lfp_data)
200 return;
201
202 lvds_lfp_data_ptrs = find_section(bdb, BDB_LVDS_LFP_DATA_PTRS);
203 if (!lvds_lfp_data_ptrs)
204 return;
205
206 dev_priv->lvds_vbt = 1;
207
208 panel_dvo_timing = get_lvds_dvo_timing(lvds_lfp_data,
209 lvds_lfp_data_ptrs,
210 lvds_options->panel_type);
211
212 panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
213 if (!panel_fixed_mode)
214 return;
215
216 fill_detail_timing_data(panel_fixed_mode, panel_dvo_timing);
217
218 dev_priv->lfp_lvds_vbt_mode = panel_fixed_mode;
219
220 DRM_DEBUG_KMS("Found panel mode in BIOS VBT tables:\n");
221 drm_mode_debug_printmodeline(panel_fixed_mode);
222
223 /*
224 * Iterate over the LVDS panel timing info to find the lowest clock
225 * for the native resolution.
226 */
227 downclock = panel_dvo_timing->clock;
228 for (i = 0; i < 16; i++) {
229 const struct lvds_dvo_timing *dvo_timing;
230
231 dvo_timing = get_lvds_dvo_timing(lvds_lfp_data,
232 lvds_lfp_data_ptrs,
233 i);
234 if (lvds_dvo_timing_equal_size(dvo_timing, panel_dvo_timing) &&
235 dvo_timing->clock < downclock)
236 downclock = dvo_timing->clock;
237 }
238
239 if (downclock < panel_dvo_timing->clock && i915_lvds_downclock) {
240 dev_priv->lvds_downclock_avail = 1;
241 dev_priv->lvds_downclock = downclock * 10;
242 DRM_DEBUG_KMS("LVDS downclock is found in VBT. "
243 "Normal Clock %dKHz, downclock %dKHz\n",
244 panel_fixed_mode->clock, 10*downclock);
245 }
246}
247
248/* Try to find sdvo panel data */
249static void
250parse_sdvo_panel_data(struct drm_i915_private *dev_priv,
251 struct bdb_header *bdb)
252{
253 struct lvds_dvo_timing *dvo_timing;
254 struct drm_display_mode *panel_fixed_mode;
255 int index;
256
257 index = i915_vbt_sdvo_panel_type;
258 if (index == -1) {
259 struct bdb_sdvo_lvds_options *sdvo_lvds_options;
260
261 sdvo_lvds_options = find_section(bdb, BDB_SDVO_LVDS_OPTIONS);
262 if (!sdvo_lvds_options)
263 return;
264
265 index = sdvo_lvds_options->panel_type;
266 }
267
268 dvo_timing = find_section(bdb, BDB_SDVO_PANEL_DTDS);
269 if (!dvo_timing)
270 return;
271
272 panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
273 if (!panel_fixed_mode)
274 return;
275
276 fill_detail_timing_data(panel_fixed_mode, dvo_timing + index);
277
278 dev_priv->sdvo_lvds_vbt_mode = panel_fixed_mode;
279
280 DRM_DEBUG_KMS("Found SDVO panel mode in BIOS VBT tables:\n");
281 drm_mode_debug_printmodeline(panel_fixed_mode);
282}
283
284static int intel_bios_ssc_frequency(struct drm_device *dev,
285 bool alternate)
286{
287 switch (INTEL_INFO(dev)->gen) {
288 case 2:
289 return alternate ? 66 : 48;
290 case 3:
291 case 4:
292 return alternate ? 100 : 96;
293 default:
294 return alternate ? 100 : 120;
295 }
296}
297
298static void
299parse_general_features(struct drm_i915_private *dev_priv,
300 struct bdb_header *bdb)
301{
302 struct drm_device *dev = dev_priv->dev;
303 struct bdb_general_features *general;
304
305 general = find_section(bdb, BDB_GENERAL_FEATURES);
306 if (general) {
307 dev_priv->int_tv_support = general->int_tv_support;
308 dev_priv->int_crt_support = general->int_crt_support;
309 dev_priv->lvds_use_ssc = general->enable_ssc;
310 dev_priv->lvds_ssc_freq =
311 intel_bios_ssc_frequency(dev, general->ssc_freq);
312 }
313}
314
315static void
316parse_general_definitions(struct drm_i915_private *dev_priv,
317 struct bdb_header *bdb)
318{
319 struct bdb_general_definitions *general;
320
321 general = find_section(bdb, BDB_GENERAL_DEFINITIONS);
322 if (general) {
323 u16 block_size = get_blocksize(general);
324 if (block_size >= sizeof(*general)) {
325 int bus_pin = general->crt_ddc_gmbus_pin;
326 DRM_DEBUG_KMS("crt_ddc_bus_pin: %d\n", bus_pin);
327 if (bus_pin >= 1 && bus_pin <= 6)
328 dev_priv->crt_ddc_pin = bus_pin;
329 } else {
330 DRM_DEBUG_KMS("BDB_GD too small (%d). Invalid.\n",
331 block_size);
332 }
333 }
334}
335
336static void
337parse_sdvo_device_mapping(struct drm_i915_private *dev_priv,
338 struct bdb_header *bdb)
339{
340 struct sdvo_device_mapping *p_mapping;
341 struct bdb_general_definitions *p_defs;
342 struct child_device_config *p_child;
343 int i, child_device_num, count;
344 u16 block_size;
345
346 p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
347 if (!p_defs) {
348 DRM_DEBUG_KMS("No general definition block is found, unable to construct sdvo mapping.\n");
349 return;
350 }
351 /* judge whether the size of child device meets the requirements.
352 * If the child device size obtained from general definition block
353 * is different with sizeof(struct child_device_config), skip the
354 * parsing of sdvo device info
355 */
356 if (p_defs->child_dev_size != sizeof(*p_child)) {
357 /* different child dev size . Ignore it */
358 DRM_DEBUG_KMS("different child size is found. Invalid.\n");
359 return;
360 }
361 /* get the block size of general definitions */
362 block_size = get_blocksize(p_defs);
363 /* get the number of child device */
364 child_device_num = (block_size - sizeof(*p_defs)) /
365 sizeof(*p_child);
366 count = 0;
367 for (i = 0; i < child_device_num; i++) {
368 p_child = &(p_defs->devices[i]);
369 if (!p_child->device_type) {
370 /* skip the device block if device type is invalid */
371 continue;
372 }
373 if (p_child->slave_addr != SLAVE_ADDR1 &&
374 p_child->slave_addr != SLAVE_ADDR2) {
375 /*
376 * If the slave address is neither 0x70 nor 0x72,
377 * it is not a SDVO device. Skip it.
378 */
379 continue;
380 }
381 if (p_child->dvo_port != DEVICE_PORT_DVOB &&
382 p_child->dvo_port != DEVICE_PORT_DVOC) {
383 /* skip the incorrect SDVO port */
384 DRM_DEBUG_KMS("Incorrect SDVO port. Skip it \n");
385 continue;
386 }
387 DRM_DEBUG_KMS("the SDVO device with slave addr %2x is found on"
388 " %s port\n",
389 p_child->slave_addr,
390 (p_child->dvo_port == DEVICE_PORT_DVOB) ?
391 "SDVOB" : "SDVOC");
392 p_mapping = &(dev_priv->sdvo_mappings[p_child->dvo_port - 1]);
393 if (!p_mapping->initialized) {
394 p_mapping->dvo_port = p_child->dvo_port;
395 p_mapping->slave_addr = p_child->slave_addr;
396 p_mapping->dvo_wiring = p_child->dvo_wiring;
397 p_mapping->ddc_pin = p_child->ddc_pin;
398 p_mapping->i2c_pin = p_child->i2c_pin;
399 p_mapping->i2c_speed = p_child->i2c_speed;
400 p_mapping->initialized = 1;
401 DRM_DEBUG_KMS("SDVO device: dvo=%x, addr=%x, wiring=%d, ddc_pin=%d, i2c_pin=%d, i2c_speed=%d\n",
402 p_mapping->dvo_port,
403 p_mapping->slave_addr,
404 p_mapping->dvo_wiring,
405 p_mapping->ddc_pin,
406 p_mapping->i2c_pin,
407 p_mapping->i2c_speed);
408 } else {
409 DRM_DEBUG_KMS("Maybe one SDVO port is shared by "
410 "two SDVO device.\n");
411 }
412 if (p_child->slave2_addr) {
413 /* Maybe this is a SDVO device with multiple inputs */
414 /* And the mapping info is not added */
415 DRM_DEBUG_KMS("there exists the slave2_addr. Maybe this"
416 " is a SDVO device with multiple inputs.\n");
417 }
418 count++;
419 }
420
421 if (!count) {
422 /* No SDVO device info is found */
423 DRM_DEBUG_KMS("No SDVO device info is found in VBT\n");
424 }
425 return;
426}
427
428static void
429parse_driver_features(struct drm_i915_private *dev_priv,
430 struct bdb_header *bdb)
431{
432 struct drm_device *dev = dev_priv->dev;
433 struct bdb_driver_features *driver;
434
435 driver = find_section(bdb, BDB_DRIVER_FEATURES);
436 if (!driver)
437 return;
438
439 if (SUPPORTS_EDP(dev) &&
440 driver->lvds_config == BDB_DRIVER_FEATURE_EDP)
441 dev_priv->edp.support = 1;
442
443 if (driver->dual_frequency)
444 dev_priv->render_reclock_avail = true;
445}
446
447static void
448parse_edp(struct drm_i915_private *dev_priv, struct bdb_header *bdb)
449{
450 struct bdb_edp *edp;
451 struct edp_power_seq *edp_pps;
452 struct edp_link_params *edp_link_params;
453
454 edp = find_section(bdb, BDB_EDP);
455 if (!edp) {
456 if (SUPPORTS_EDP(dev_priv->dev) && dev_priv->edp.support) {
457 DRM_DEBUG_KMS("No eDP BDB found but eDP panel "
458 "supported, assume %dbpp panel color "
459 "depth.\n",
460 dev_priv->edp.bpp);
461 }
462 return;
463 }
464
465 switch ((edp->color_depth >> (panel_type * 2)) & 3) {
466 case EDP_18BPP:
467 dev_priv->edp.bpp = 18;
468 break;
469 case EDP_24BPP:
470 dev_priv->edp.bpp = 24;
471 break;
472 case EDP_30BPP:
473 dev_priv->edp.bpp = 30;
474 break;
475 }
476
477 /* Get the eDP sequencing and link info */
478 edp_pps = &edp->power_seqs[panel_type];
479 edp_link_params = &edp->link_params[panel_type];
480
481 dev_priv->edp.pps = *edp_pps;
482
483 dev_priv->edp.rate = edp_link_params->rate ? DP_LINK_BW_2_7 :
484 DP_LINK_BW_1_62;
485 switch (edp_link_params->lanes) {
486 case 0:
487 dev_priv->edp.lanes = 1;
488 break;
489 case 1:
490 dev_priv->edp.lanes = 2;
491 break;
492 case 3:
493 default:
494 dev_priv->edp.lanes = 4;
495 break;
496 }
497 switch (edp_link_params->preemphasis) {
498 case 0:
499 dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPHASIS_0;
500 break;
501 case 1:
502 dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPHASIS_3_5;
503 break;
504 case 2:
505 dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPHASIS_6;
506 break;
507 case 3:
508 dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPHASIS_9_5;
509 break;
510 }
511 switch (edp_link_params->vswing) {
512 case 0:
513 dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_400;
514 break;
515 case 1:
516 dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_600;
517 break;
518 case 2:
519 dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_800;
520 break;
521 case 3:
522 dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_1200;
523 break;
524 }
525}
526
527static void
528parse_device_mapping(struct drm_i915_private *dev_priv,
529 struct bdb_header *bdb)
530{
531 struct bdb_general_definitions *p_defs;
532 struct child_device_config *p_child, *child_dev_ptr;
533 int i, child_device_num, count;
534 u16 block_size;
535
536 p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
537 if (!p_defs) {
538 DRM_DEBUG_KMS("No general definition block is found, no devices defined.\n");
539 return;
540 }
541 /* judge whether the size of child device meets the requirements.
542 * If the child device size obtained from general definition block
543 * is different with sizeof(struct child_device_config), skip the
544 * parsing of sdvo device info
545 */
546 if (p_defs->child_dev_size != sizeof(*p_child)) {
547 /* different child dev size . Ignore it */
548 DRM_DEBUG_KMS("different child size is found. Invalid.\n");
549 return;
550 }
551 /* get the block size of general definitions */
552 block_size = get_blocksize(p_defs);
553 /* get the number of child device */
554 child_device_num = (block_size - sizeof(*p_defs)) /
555 sizeof(*p_child);
556 count = 0;
557 /* get the number of child device that is present */
558 for (i = 0; i < child_device_num; i++) {
559 p_child = &(p_defs->devices[i]);
560 if (!p_child->device_type) {
561 /* skip the device block if device type is invalid */
562 continue;
563 }
564 count++;
565 }
566 if (!count) {
567 DRM_DEBUG_KMS("no child dev is parsed from VBT \n");
568 return;
569 }
570 dev_priv->child_dev = kzalloc(sizeof(*p_child) * count, GFP_KERNEL);
571 if (!dev_priv->child_dev) {
572 DRM_DEBUG_KMS("No memory space for child device\n");
573 return;
574 }
575
576 dev_priv->child_dev_num = count;
577 count = 0;
578 for (i = 0; i < child_device_num; i++) {
579 p_child = &(p_defs->devices[i]);
580 if (!p_child->device_type) {
581 /* skip the device block if device type is invalid */
582 continue;
583 }
584 child_dev_ptr = dev_priv->child_dev + count;
585 count++;
586 memcpy((void *)child_dev_ptr, (void *)p_child,
587 sizeof(*p_child));
588 }
589 return;
590}
591
592static void
593init_vbt_defaults(struct drm_i915_private *dev_priv)
594{
595 struct drm_device *dev = dev_priv->dev;
596
597 dev_priv->crt_ddc_pin = GMBUS_PORT_VGADDC;
598
599 /* LFP panel data */
600 dev_priv->lvds_dither = 1;
601 dev_priv->lvds_vbt = 0;
602
603 /* SDVO panel data */
604 dev_priv->sdvo_lvds_vbt_mode = NULL;
605
606 /* general features */
607 dev_priv->int_tv_support = 1;
608 dev_priv->int_crt_support = 1;
609
610 /* Default to using SSC */
611 dev_priv->lvds_use_ssc = 1;
612 dev_priv->lvds_ssc_freq = intel_bios_ssc_frequency(dev, 1);
613 DRM_DEBUG("Set default to SSC at %dMHz\n", dev_priv->lvds_ssc_freq);
614
615 /* eDP data */
616 dev_priv->edp.bpp = 18;
617}
618
619/**
620 * intel_parse_bios - find VBT and initialize settings from the BIOS
621 * @dev: DRM device
622 *
623 * Loads the Video BIOS and checks that the VBT exists. Sets scratch registers
624 * to appropriate values.
625 *
626 * Returns 0 on success, nonzero on failure.
627 */
628bool
629intel_parse_bios(struct drm_device *dev)
630{
631 struct drm_i915_private *dev_priv = dev->dev_private;
632 struct pci_dev *pdev = dev->pdev;
633 struct bdb_header *bdb = NULL;
634 u8 __iomem *bios = NULL;
635
636 init_vbt_defaults(dev_priv);
637
638 /* XXX Should this validation be moved to intel_opregion.c? */
639 if (dev_priv->opregion.vbt) {
640 struct vbt_header *vbt = dev_priv->opregion.vbt;
641 if (memcmp(vbt->signature, "$VBT", 4) == 0) {
642 DRM_DEBUG_DRIVER("Using VBT from OpRegion: %20s\n",
643 vbt->signature);
644 bdb = (struct bdb_header *)((char *)vbt + vbt->bdb_offset);
645 } else
646 dev_priv->opregion.vbt = NULL;
647 }
648
649 if (bdb == NULL) {
650 struct vbt_header *vbt = NULL;
651 size_t size;
652 int i;
653
654 bios = pci_map_rom(pdev, &size);
655 if (!bios)
656 return -1;
657
658 /* Scour memory looking for the VBT signature */
659 for (i = 0; i + 4 < size; i++) {
660 if (!memcmp(bios + i, "$VBT", 4)) {
661 vbt = (struct vbt_header *)(bios + i);
662 break;
663 }
664 }
665
666 if (!vbt) {
667 DRM_ERROR("VBT signature missing\n");
668 pci_unmap_rom(pdev, bios);
669 return -1;
670 }
671
672 bdb = (struct bdb_header *)(bios + i + vbt->bdb_offset);
673 }
674
675 /* Grab useful general definitions */
676 parse_general_features(dev_priv, bdb);
677 parse_general_definitions(dev_priv, bdb);
678 parse_lfp_panel_data(dev_priv, bdb);
679 parse_sdvo_panel_data(dev_priv, bdb);
680 parse_sdvo_device_mapping(dev_priv, bdb);
681 parse_device_mapping(dev_priv, bdb);
682 parse_driver_features(dev_priv, bdb);
683 parse_edp(dev_priv, bdb);
684
685 if (bios)
686 pci_unmap_rom(pdev, bios);
687
688 return 0;
689}
690
691/* Ensure that vital registers have been initialised, even if the BIOS
692 * is absent or just failing to do its job.
693 */
694void intel_setup_bios(struct drm_device *dev)
695{
696 struct drm_i915_private *dev_priv = dev->dev_private;
697
698 /* Set the Panel Power On/Off timings if uninitialized. */
699 if ((I915_READ(PP_ON_DELAYS) == 0) && (I915_READ(PP_OFF_DELAYS) == 0)) {
700 /* Set T2 to 40ms and T5 to 200ms */
701 I915_WRITE(PP_ON_DELAYS, 0x019007d0);
702
703 /* Set T3 to 35ms and Tx to 200ms */
704 I915_WRITE(PP_OFF_DELAYS, 0x015e07d0);
705 }
706}
1/*
2 * Copyright © 2006 Intel Corporation
3 *
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:
10 *
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
13 * Software.
14 *
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
21 * SOFTWARE.
22 *
23 * Authors:
24 * Eric Anholt <eric@anholt.net>
25 *
26 */
27#include <linux/dmi.h>
28#include <drm/drm_dp_helper.h>
29#include <drm/drmP.h>
30#include <drm/i915_drm.h>
31#include "i915_drv.h"
32#include "intel_bios.h"
33
34#define SLAVE_ADDR1 0x70
35#define SLAVE_ADDR2 0x72
36
37static int panel_type;
38
39static void *
40find_section(struct bdb_header *bdb, int section_id)
41{
42 u8 *base = (u8 *)bdb;
43 int index = 0;
44 u16 total, current_size;
45 u8 current_id;
46
47 /* skip to first section */
48 index += bdb->header_size;
49 total = bdb->bdb_size;
50
51 /* walk the sections looking for section_id */
52 while (index < total) {
53 current_id = *(base + index);
54 index++;
55 current_size = *((u16 *)(base + index));
56 index += 2;
57 if (current_id == section_id)
58 return base + index;
59 index += current_size;
60 }
61
62 return NULL;
63}
64
65static u16
66get_blocksize(void *p)
67{
68 u16 *block_ptr, block_size;
69
70 block_ptr = (u16 *)((char *)p - 2);
71 block_size = *block_ptr;
72 return block_size;
73}
74
75static void
76fill_detail_timing_data(struct drm_display_mode *panel_fixed_mode,
77 const struct lvds_dvo_timing *dvo_timing)
78{
79 panel_fixed_mode->hdisplay = (dvo_timing->hactive_hi << 8) |
80 dvo_timing->hactive_lo;
81 panel_fixed_mode->hsync_start = panel_fixed_mode->hdisplay +
82 ((dvo_timing->hsync_off_hi << 8) | dvo_timing->hsync_off_lo);
83 panel_fixed_mode->hsync_end = panel_fixed_mode->hsync_start +
84 dvo_timing->hsync_pulse_width;
85 panel_fixed_mode->htotal = panel_fixed_mode->hdisplay +
86 ((dvo_timing->hblank_hi << 8) | dvo_timing->hblank_lo);
87
88 panel_fixed_mode->vdisplay = (dvo_timing->vactive_hi << 8) |
89 dvo_timing->vactive_lo;
90 panel_fixed_mode->vsync_start = panel_fixed_mode->vdisplay +
91 dvo_timing->vsync_off;
92 panel_fixed_mode->vsync_end = panel_fixed_mode->vsync_start +
93 dvo_timing->vsync_pulse_width;
94 panel_fixed_mode->vtotal = panel_fixed_mode->vdisplay +
95 ((dvo_timing->vblank_hi << 8) | dvo_timing->vblank_lo);
96 panel_fixed_mode->clock = dvo_timing->clock * 10;
97 panel_fixed_mode->type = DRM_MODE_TYPE_PREFERRED;
98
99 if (dvo_timing->hsync_positive)
100 panel_fixed_mode->flags |= DRM_MODE_FLAG_PHSYNC;
101 else
102 panel_fixed_mode->flags |= DRM_MODE_FLAG_NHSYNC;
103
104 if (dvo_timing->vsync_positive)
105 panel_fixed_mode->flags |= DRM_MODE_FLAG_PVSYNC;
106 else
107 panel_fixed_mode->flags |= DRM_MODE_FLAG_NVSYNC;
108
109 /* Some VBTs have bogus h/vtotal values */
110 if (panel_fixed_mode->hsync_end > panel_fixed_mode->htotal)
111 panel_fixed_mode->htotal = panel_fixed_mode->hsync_end + 1;
112 if (panel_fixed_mode->vsync_end > panel_fixed_mode->vtotal)
113 panel_fixed_mode->vtotal = panel_fixed_mode->vsync_end + 1;
114
115 drm_mode_set_name(panel_fixed_mode);
116}
117
118static bool
119lvds_dvo_timing_equal_size(const struct lvds_dvo_timing *a,
120 const struct lvds_dvo_timing *b)
121{
122 if (a->hactive_hi != b->hactive_hi ||
123 a->hactive_lo != b->hactive_lo)
124 return false;
125
126 if (a->hsync_off_hi != b->hsync_off_hi ||
127 a->hsync_off_lo != b->hsync_off_lo)
128 return false;
129
130 if (a->hsync_pulse_width != b->hsync_pulse_width)
131 return false;
132
133 if (a->hblank_hi != b->hblank_hi ||
134 a->hblank_lo != b->hblank_lo)
135 return false;
136
137 if (a->vactive_hi != b->vactive_hi ||
138 a->vactive_lo != b->vactive_lo)
139 return false;
140
141 if (a->vsync_off != b->vsync_off)
142 return false;
143
144 if (a->vsync_pulse_width != b->vsync_pulse_width)
145 return false;
146
147 if (a->vblank_hi != b->vblank_hi ||
148 a->vblank_lo != b->vblank_lo)
149 return false;
150
151 return true;
152}
153
154static const struct lvds_dvo_timing *
155get_lvds_dvo_timing(const struct bdb_lvds_lfp_data *lvds_lfp_data,
156 const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs,
157 int index)
158{
159 /*
160 * the size of fp_timing varies on the different platform.
161 * So calculate the DVO timing relative offset in LVDS data
162 * entry to get the DVO timing entry
163 */
164
165 int lfp_data_size =
166 lvds_lfp_data_ptrs->ptr[1].dvo_timing_offset -
167 lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset;
168 int dvo_timing_offset =
169 lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset -
170 lvds_lfp_data_ptrs->ptr[0].fp_timing_offset;
171 char *entry = (char *)lvds_lfp_data->data + lfp_data_size * index;
172
173 return (struct lvds_dvo_timing *)(entry + dvo_timing_offset);
174}
175
176/* get lvds_fp_timing entry
177 * this function may return NULL if the corresponding entry is invalid
178 */
179static const struct lvds_fp_timing *
180get_lvds_fp_timing(const struct bdb_header *bdb,
181 const struct bdb_lvds_lfp_data *data,
182 const struct bdb_lvds_lfp_data_ptrs *ptrs,
183 int index)
184{
185 size_t data_ofs = (const u8 *)data - (const u8 *)bdb;
186 u16 data_size = ((const u16 *)data)[-1]; /* stored in header */
187 size_t ofs;
188
189 if (index >= ARRAY_SIZE(ptrs->ptr))
190 return NULL;
191 ofs = ptrs->ptr[index].fp_timing_offset;
192 if (ofs < data_ofs ||
193 ofs + sizeof(struct lvds_fp_timing) > data_ofs + data_size)
194 return NULL;
195 return (const struct lvds_fp_timing *)((const u8 *)bdb + ofs);
196}
197
198/* Try to find integrated panel data */
199static void
200parse_lfp_panel_data(struct drm_i915_private *dev_priv,
201 struct bdb_header *bdb)
202{
203 const struct bdb_lvds_options *lvds_options;
204 const struct bdb_lvds_lfp_data *lvds_lfp_data;
205 const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs;
206 const struct lvds_dvo_timing *panel_dvo_timing;
207 const struct lvds_fp_timing *fp_timing;
208 struct drm_display_mode *panel_fixed_mode;
209 int i, downclock;
210
211 lvds_options = find_section(bdb, BDB_LVDS_OPTIONS);
212 if (!lvds_options)
213 return;
214
215 dev_priv->vbt.lvds_dither = lvds_options->pixel_dither;
216 if (lvds_options->panel_type == 0xff)
217 return;
218
219 panel_type = lvds_options->panel_type;
220
221 lvds_lfp_data = find_section(bdb, BDB_LVDS_LFP_DATA);
222 if (!lvds_lfp_data)
223 return;
224
225 lvds_lfp_data_ptrs = find_section(bdb, BDB_LVDS_LFP_DATA_PTRS);
226 if (!lvds_lfp_data_ptrs)
227 return;
228
229 dev_priv->vbt.lvds_vbt = 1;
230
231 panel_dvo_timing = get_lvds_dvo_timing(lvds_lfp_data,
232 lvds_lfp_data_ptrs,
233 lvds_options->panel_type);
234
235 panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
236 if (!panel_fixed_mode)
237 return;
238
239 fill_detail_timing_data(panel_fixed_mode, panel_dvo_timing);
240
241 dev_priv->vbt.lfp_lvds_vbt_mode = panel_fixed_mode;
242
243 DRM_DEBUG_KMS("Found panel mode in BIOS VBT tables:\n");
244 drm_mode_debug_printmodeline(panel_fixed_mode);
245
246 /*
247 * Iterate over the LVDS panel timing info to find the lowest clock
248 * for the native resolution.
249 */
250 downclock = panel_dvo_timing->clock;
251 for (i = 0; i < 16; i++) {
252 const struct lvds_dvo_timing *dvo_timing;
253
254 dvo_timing = get_lvds_dvo_timing(lvds_lfp_data,
255 lvds_lfp_data_ptrs,
256 i);
257 if (lvds_dvo_timing_equal_size(dvo_timing, panel_dvo_timing) &&
258 dvo_timing->clock < downclock)
259 downclock = dvo_timing->clock;
260 }
261
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);
268 }
269
270 fp_timing = get_lvds_fp_timing(bdb, lvds_lfp_data,
271 lvds_lfp_data_ptrs,
272 lvds_options->panel_type);
273 if (fp_timing) {
274 /* check the resolution, just to be sure */
275 if (fp_timing->x_res == panel_fixed_mode->hdisplay &&
276 fp_timing->y_res == panel_fixed_mode->vdisplay) {
277 dev_priv->vbt.bios_lvds_val = fp_timing->lvds_reg_val;
278 DRM_DEBUG_KMS("VBT initial LVDS value %x\n",
279 dev_priv->vbt.bios_lvds_val);
280 }
281 }
282}
283
284static void
285parse_lfp_backlight(struct drm_i915_private *dev_priv, struct bdb_header *bdb)
286{
287 const struct bdb_lfp_backlight_data *backlight_data;
288 const struct bdb_lfp_backlight_data_entry *entry;
289
290 /* Err to enabling backlight if no backlight block. */
291 dev_priv->vbt.backlight.present = true;
292
293 backlight_data = find_section(bdb, BDB_LVDS_BACKLIGHT);
294 if (!backlight_data)
295 return;
296
297 if (backlight_data->entry_size != sizeof(backlight_data->data[0])) {
298 DRM_DEBUG_KMS("Unsupported backlight data entry size %u\n",
299 backlight_data->entry_size);
300 return;
301 }
302
303 entry = &backlight_data->data[panel_type];
304
305 dev_priv->vbt.backlight.present = entry->type == BDB_BACKLIGHT_TYPE_PWM;
306 if (!dev_priv->vbt.backlight.present) {
307 DRM_DEBUG_KMS("PWM backlight not present in VBT (type %u)\n",
308 entry->type);
309 return;
310 }
311
312 dev_priv->vbt.backlight.pwm_freq_hz = entry->pwm_freq_hz;
313 dev_priv->vbt.backlight.active_low_pwm = entry->active_low_pwm;
314 DRM_DEBUG_KMS("VBT backlight PWM modulation frequency %u Hz, "
315 "active %s, min brightness %u, level %u\n",
316 dev_priv->vbt.backlight.pwm_freq_hz,
317 dev_priv->vbt.backlight.active_low_pwm ? "low" : "high",
318 entry->min_brightness,
319 backlight_data->level[panel_type]);
320}
321
322/* Try to find sdvo panel data */
323static void
324parse_sdvo_panel_data(struct drm_i915_private *dev_priv,
325 struct bdb_header *bdb)
326{
327 struct lvds_dvo_timing *dvo_timing;
328 struct drm_display_mode *panel_fixed_mode;
329 int index;
330
331 index = i915.vbt_sdvo_panel_type;
332 if (index == -2) {
333 DRM_DEBUG_KMS("Ignore SDVO panel mode from BIOS VBT tables.\n");
334 return;
335 }
336
337 if (index == -1) {
338 struct bdb_sdvo_lvds_options *sdvo_lvds_options;
339
340 sdvo_lvds_options = find_section(bdb, BDB_SDVO_LVDS_OPTIONS);
341 if (!sdvo_lvds_options)
342 return;
343
344 index = sdvo_lvds_options->panel_type;
345 }
346
347 dvo_timing = find_section(bdb, BDB_SDVO_PANEL_DTDS);
348 if (!dvo_timing)
349 return;
350
351 panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
352 if (!panel_fixed_mode)
353 return;
354
355 fill_detail_timing_data(panel_fixed_mode, dvo_timing + index);
356
357 dev_priv->vbt.sdvo_lvds_vbt_mode = panel_fixed_mode;
358
359 DRM_DEBUG_KMS("Found SDVO panel mode in BIOS VBT tables:\n");
360 drm_mode_debug_printmodeline(panel_fixed_mode);
361}
362
363static int intel_bios_ssc_frequency(struct drm_device *dev,
364 bool alternate)
365{
366 switch (INTEL_INFO(dev)->gen) {
367 case 2:
368 return alternate ? 66667 : 48000;
369 case 3:
370 case 4:
371 return alternate ? 100000 : 96000;
372 default:
373 return alternate ? 100000 : 120000;
374 }
375}
376
377static void
378parse_general_features(struct drm_i915_private *dev_priv,
379 struct bdb_header *bdb)
380{
381 struct drm_device *dev = dev_priv->dev;
382 struct bdb_general_features *general;
383
384 general = find_section(bdb, BDB_GENERAL_FEATURES);
385 if (general) {
386 dev_priv->vbt.int_tv_support = general->int_tv_support;
387 dev_priv->vbt.int_crt_support = general->int_crt_support;
388 dev_priv->vbt.lvds_use_ssc = general->enable_ssc;
389 dev_priv->vbt.lvds_ssc_freq =
390 intel_bios_ssc_frequency(dev, general->ssc_freq);
391 dev_priv->vbt.display_clock_mode = general->display_clock_mode;
392 dev_priv->vbt.fdi_rx_polarity_inverted = general->fdi_rx_polarity_inverted;
393 DRM_DEBUG_KMS("BDB_GENERAL_FEATURES int_tv_support %d int_crt_support %d lvds_use_ssc %d lvds_ssc_freq %d display_clock_mode %d fdi_rx_polarity_inverted %d\n",
394 dev_priv->vbt.int_tv_support,
395 dev_priv->vbt.int_crt_support,
396 dev_priv->vbt.lvds_use_ssc,
397 dev_priv->vbt.lvds_ssc_freq,
398 dev_priv->vbt.display_clock_mode,
399 dev_priv->vbt.fdi_rx_polarity_inverted);
400 }
401}
402
403static void
404parse_general_definitions(struct drm_i915_private *dev_priv,
405 struct bdb_header *bdb)
406{
407 struct bdb_general_definitions *general;
408
409 general = find_section(bdb, BDB_GENERAL_DEFINITIONS);
410 if (general) {
411 u16 block_size = get_blocksize(general);
412 if (block_size >= sizeof(*general)) {
413 int bus_pin = general->crt_ddc_gmbus_pin;
414 DRM_DEBUG_KMS("crt_ddc_bus_pin: %d\n", bus_pin);
415 if (intel_gmbus_is_port_valid(bus_pin))
416 dev_priv->vbt.crt_ddc_pin = bus_pin;
417 } else {
418 DRM_DEBUG_KMS("BDB_GD too small (%d). Invalid.\n",
419 block_size);
420 }
421 }
422}
423
424static void
425parse_sdvo_device_mapping(struct drm_i915_private *dev_priv,
426 struct bdb_header *bdb)
427{
428 struct sdvo_device_mapping *p_mapping;
429 struct bdb_general_definitions *p_defs;
430 union child_device_config *p_child;
431 int i, child_device_num, count;
432 u16 block_size;
433
434 p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
435 if (!p_defs) {
436 DRM_DEBUG_KMS("No general definition block is found, unable to construct sdvo mapping.\n");
437 return;
438 }
439 /* judge whether the size of child device meets the requirements.
440 * If the child device size obtained from general definition block
441 * is different with sizeof(struct child_device_config), skip the
442 * parsing of sdvo device info
443 */
444 if (p_defs->child_dev_size != sizeof(*p_child)) {
445 /* different child dev size . Ignore it */
446 DRM_DEBUG_KMS("different child size is found. Invalid.\n");
447 return;
448 }
449 /* get the block size of general definitions */
450 block_size = get_blocksize(p_defs);
451 /* get the number of child device */
452 child_device_num = (block_size - sizeof(*p_defs)) /
453 sizeof(*p_child);
454 count = 0;
455 for (i = 0; i < child_device_num; i++) {
456 p_child = &(p_defs->devices[i]);
457 if (!p_child->old.device_type) {
458 /* skip the device block if device type is invalid */
459 continue;
460 }
461 if (p_child->old.slave_addr != SLAVE_ADDR1 &&
462 p_child->old.slave_addr != SLAVE_ADDR2) {
463 /*
464 * If the slave address is neither 0x70 nor 0x72,
465 * it is not a SDVO device. Skip it.
466 */
467 continue;
468 }
469 if (p_child->old.dvo_port != DEVICE_PORT_DVOB &&
470 p_child->old.dvo_port != DEVICE_PORT_DVOC) {
471 /* skip the incorrect SDVO port */
472 DRM_DEBUG_KMS("Incorrect SDVO port. Skip it\n");
473 continue;
474 }
475 DRM_DEBUG_KMS("the SDVO device with slave addr %2x is found on"
476 " %s port\n",
477 p_child->old.slave_addr,
478 (p_child->old.dvo_port == DEVICE_PORT_DVOB) ?
479 "SDVOB" : "SDVOC");
480 p_mapping = &(dev_priv->sdvo_mappings[p_child->old.dvo_port - 1]);
481 if (!p_mapping->initialized) {
482 p_mapping->dvo_port = p_child->old.dvo_port;
483 p_mapping->slave_addr = p_child->old.slave_addr;
484 p_mapping->dvo_wiring = p_child->old.dvo_wiring;
485 p_mapping->ddc_pin = p_child->old.ddc_pin;
486 p_mapping->i2c_pin = p_child->old.i2c_pin;
487 p_mapping->initialized = 1;
488 DRM_DEBUG_KMS("SDVO device: dvo=%x, addr=%x, wiring=%d, ddc_pin=%d, i2c_pin=%d\n",
489 p_mapping->dvo_port,
490 p_mapping->slave_addr,
491 p_mapping->dvo_wiring,
492 p_mapping->ddc_pin,
493 p_mapping->i2c_pin);
494 } else {
495 DRM_DEBUG_KMS("Maybe one SDVO port is shared by "
496 "two SDVO device.\n");
497 }
498 if (p_child->old.slave2_addr) {
499 /* Maybe this is a SDVO device with multiple inputs */
500 /* And the mapping info is not added */
501 DRM_DEBUG_KMS("there exists the slave2_addr. Maybe this"
502 " is a SDVO device with multiple inputs.\n");
503 }
504 count++;
505 }
506
507 if (!count) {
508 /* No SDVO device info is found */
509 DRM_DEBUG_KMS("No SDVO device info is found in VBT\n");
510 }
511 return;
512}
513
514static void
515parse_driver_features(struct drm_i915_private *dev_priv,
516 struct bdb_header *bdb)
517{
518 struct bdb_driver_features *driver;
519
520 driver = find_section(bdb, BDB_DRIVER_FEATURES);
521 if (!driver)
522 return;
523
524 if (driver->lvds_config == BDB_DRIVER_FEATURE_EDP)
525 dev_priv->vbt.edp_support = 1;
526
527 if (driver->dual_frequency)
528 dev_priv->render_reclock_avail = true;
529}
530
531static void
532parse_edp(struct drm_i915_private *dev_priv, struct bdb_header *bdb)
533{
534 struct bdb_edp *edp;
535 struct edp_power_seq *edp_pps;
536 struct edp_link_params *edp_link_params;
537
538 edp = find_section(bdb, BDB_EDP);
539 if (!edp) {
540 if (dev_priv->vbt.edp_support)
541 DRM_DEBUG_KMS("No eDP BDB found but eDP panel supported.\n");
542 return;
543 }
544
545 switch ((edp->color_depth >> (panel_type * 2)) & 3) {
546 case EDP_18BPP:
547 dev_priv->vbt.edp_bpp = 18;
548 break;
549 case EDP_24BPP:
550 dev_priv->vbt.edp_bpp = 24;
551 break;
552 case EDP_30BPP:
553 dev_priv->vbt.edp_bpp = 30;
554 break;
555 }
556
557 /* Get the eDP sequencing and link info */
558 edp_pps = &edp->power_seqs[panel_type];
559 edp_link_params = &edp->link_params[panel_type];
560
561 dev_priv->vbt.edp_pps = *edp_pps;
562
563 switch (edp_link_params->rate) {
564 case EDP_RATE_1_62:
565 dev_priv->vbt.edp_rate = DP_LINK_BW_1_62;
566 break;
567 case EDP_RATE_2_7:
568 dev_priv->vbt.edp_rate = DP_LINK_BW_2_7;
569 break;
570 default:
571 DRM_DEBUG_KMS("VBT has unknown eDP link rate value %u\n",
572 edp_link_params->rate);
573 break;
574 }
575
576 switch (edp_link_params->lanes) {
577 case EDP_LANE_1:
578 dev_priv->vbt.edp_lanes = 1;
579 break;
580 case EDP_LANE_2:
581 dev_priv->vbt.edp_lanes = 2;
582 break;
583 case EDP_LANE_4:
584 dev_priv->vbt.edp_lanes = 4;
585 break;
586 default:
587 DRM_DEBUG_KMS("VBT has unknown eDP lane count value %u\n",
588 edp_link_params->lanes);
589 break;
590 }
591
592 switch (edp_link_params->preemphasis) {
593 case EDP_PREEMPHASIS_NONE:
594 dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPHASIS_0;
595 break;
596 case EDP_PREEMPHASIS_3_5dB:
597 dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPHASIS_3_5;
598 break;
599 case EDP_PREEMPHASIS_6dB:
600 dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPHASIS_6;
601 break;
602 case EDP_PREEMPHASIS_9_5dB:
603 dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPHASIS_9_5;
604 break;
605 default:
606 DRM_DEBUG_KMS("VBT has unknown eDP pre-emphasis value %u\n",
607 edp_link_params->preemphasis);
608 break;
609 }
610
611 switch (edp_link_params->vswing) {
612 case EDP_VSWING_0_4V:
613 dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_400;
614 break;
615 case EDP_VSWING_0_6V:
616 dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_600;
617 break;
618 case EDP_VSWING_0_8V:
619 dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_800;
620 break;
621 case EDP_VSWING_1_2V:
622 dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_1200;
623 break;
624 default:
625 DRM_DEBUG_KMS("VBT has unknown eDP voltage swing value %u\n",
626 edp_link_params->vswing);
627 break;
628 }
629}
630
631static void
632parse_mipi(struct drm_i915_private *dev_priv, struct bdb_header *bdb)
633{
634 struct bdb_mipi *mipi;
635
636 mipi = find_section(bdb, BDB_MIPI_CONFIG);
637 if (!mipi) {
638 DRM_DEBUG_KMS("No MIPI BDB found");
639 return;
640 }
641
642 /* XXX: add more info */
643 dev_priv->vbt.dsi.panel_id = MIPI_DSI_GENERIC_PANEL_ID;
644}
645
646static void parse_ddi_port(struct drm_i915_private *dev_priv, enum port port,
647 struct bdb_header *bdb)
648{
649 union child_device_config *it, *child = NULL;
650 struct ddi_vbt_port_info *info = &dev_priv->vbt.ddi_port_info[port];
651 uint8_t hdmi_level_shift;
652 int i, j;
653 bool is_dvi, is_hdmi, is_dp, is_edp, is_crt;
654 uint8_t aux_channel;
655 /* Each DDI port can have more than one value on the "DVO Port" field,
656 * so look for all the possible values for each port and abort if more
657 * than one is found. */
658 int dvo_ports[][2] = {
659 {DVO_PORT_HDMIA, DVO_PORT_DPA},
660 {DVO_PORT_HDMIB, DVO_PORT_DPB},
661 {DVO_PORT_HDMIC, DVO_PORT_DPC},
662 {DVO_PORT_HDMID, DVO_PORT_DPD},
663 {DVO_PORT_CRT, -1 /* Port E can only be DVO_PORT_CRT */ },
664 };
665
666 /* Find the child device to use, abort if more than one found. */
667 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
668 it = dev_priv->vbt.child_dev + i;
669
670 for (j = 0; j < 2; j++) {
671 if (dvo_ports[port][j] == -1)
672 break;
673
674 if (it->common.dvo_port == dvo_ports[port][j]) {
675 if (child) {
676 DRM_DEBUG_KMS("More than one child device for port %c in VBT.\n",
677 port_name(port));
678 return;
679 }
680 child = it;
681 }
682 }
683 }
684 if (!child)
685 return;
686
687 aux_channel = child->raw[25];
688
689 is_dvi = child->common.device_type & DEVICE_TYPE_TMDS_DVI_SIGNALING;
690 is_dp = child->common.device_type & DEVICE_TYPE_DISPLAYPORT_OUTPUT;
691 is_crt = child->common.device_type & DEVICE_TYPE_ANALOG_OUTPUT;
692 is_hdmi = is_dvi && (child->common.device_type & DEVICE_TYPE_NOT_HDMI_OUTPUT) == 0;
693 is_edp = is_dp && (child->common.device_type & DEVICE_TYPE_INTERNAL_CONNECTOR);
694
695 info->supports_dvi = is_dvi;
696 info->supports_hdmi = is_hdmi;
697 info->supports_dp = is_dp;
698
699 DRM_DEBUG_KMS("Port %c VBT info: DP:%d HDMI:%d DVI:%d EDP:%d CRT:%d\n",
700 port_name(port), is_dp, is_hdmi, is_dvi, is_edp, is_crt);
701
702 if (is_edp && is_dvi)
703 DRM_DEBUG_KMS("Internal DP port %c is TMDS compatible\n",
704 port_name(port));
705 if (is_crt && port != PORT_E)
706 DRM_DEBUG_KMS("Port %c is analog\n", port_name(port));
707 if (is_crt && (is_dvi || is_dp))
708 DRM_DEBUG_KMS("Analog port %c is also DP or TMDS compatible\n",
709 port_name(port));
710 if (is_dvi && (port == PORT_A || port == PORT_E))
711 DRM_DEBUG_KMS("Port %c is TMDS compabile\n", port_name(port));
712 if (!is_dvi && !is_dp && !is_crt)
713 DRM_DEBUG_KMS("Port %c is not DP/TMDS/CRT compatible\n",
714 port_name(port));
715 if (is_edp && (port == PORT_B || port == PORT_C || port == PORT_E))
716 DRM_DEBUG_KMS("Port %c is internal DP\n", port_name(port));
717
718 if (is_dvi) {
719 if (child->common.ddc_pin == 0x05 && port != PORT_B)
720 DRM_DEBUG_KMS("Unexpected DDC pin for port B\n");
721 if (child->common.ddc_pin == 0x04 && port != PORT_C)
722 DRM_DEBUG_KMS("Unexpected DDC pin for port C\n");
723 if (child->common.ddc_pin == 0x06 && port != PORT_D)
724 DRM_DEBUG_KMS("Unexpected DDC pin for port D\n");
725 }
726
727 if (is_dp) {
728 if (aux_channel == 0x40 && port != PORT_A)
729 DRM_DEBUG_KMS("Unexpected AUX channel for port A\n");
730 if (aux_channel == 0x10 && port != PORT_B)
731 DRM_DEBUG_KMS("Unexpected AUX channel for port B\n");
732 if (aux_channel == 0x20 && port != PORT_C)
733 DRM_DEBUG_KMS("Unexpected AUX channel for port C\n");
734 if (aux_channel == 0x30 && port != PORT_D)
735 DRM_DEBUG_KMS("Unexpected AUX channel for port D\n");
736 }
737
738 if (bdb->version >= 158) {
739 /* The VBT HDMI level shift values match the table we have. */
740 hdmi_level_shift = child->raw[7] & 0xF;
741 if (hdmi_level_shift < 0xC) {
742 DRM_DEBUG_KMS("VBT HDMI level shift for port %c: %d\n",
743 port_name(port),
744 hdmi_level_shift);
745 info->hdmi_level_shift = hdmi_level_shift;
746 }
747 }
748}
749
750static void parse_ddi_ports(struct drm_i915_private *dev_priv,
751 struct bdb_header *bdb)
752{
753 struct drm_device *dev = dev_priv->dev;
754 enum port port;
755
756 if (!HAS_DDI(dev))
757 return;
758
759 if (!dev_priv->vbt.child_dev_num)
760 return;
761
762 if (bdb->version < 155)
763 return;
764
765 for (port = PORT_A; port < I915_MAX_PORTS; port++)
766 parse_ddi_port(dev_priv, port, bdb);
767}
768
769static void
770parse_device_mapping(struct drm_i915_private *dev_priv,
771 struct bdb_header *bdb)
772{
773 struct bdb_general_definitions *p_defs;
774 union child_device_config *p_child, *child_dev_ptr;
775 int i, child_device_num, count;
776 u16 block_size;
777
778 p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
779 if (!p_defs) {
780 DRM_DEBUG_KMS("No general definition block is found, no devices defined.\n");
781 return;
782 }
783 /* judge whether the size of child device meets the requirements.
784 * If the child device size obtained from general definition block
785 * is different with sizeof(struct child_device_config), skip the
786 * parsing of sdvo device info
787 */
788 if (p_defs->child_dev_size != sizeof(*p_child)) {
789 /* different child dev size . Ignore it */
790 DRM_DEBUG_KMS("different child size is found. Invalid.\n");
791 return;
792 }
793 /* get the block size of general definitions */
794 block_size = get_blocksize(p_defs);
795 /* get the number of child device */
796 child_device_num = (block_size - sizeof(*p_defs)) /
797 sizeof(*p_child);
798 count = 0;
799 /* get the number of child device that is present */
800 for (i = 0; i < child_device_num; i++) {
801 p_child = &(p_defs->devices[i]);
802 if (!p_child->common.device_type) {
803 /* skip the device block if device type is invalid */
804 continue;
805 }
806 count++;
807 }
808 if (!count) {
809 DRM_DEBUG_KMS("no child dev is parsed from VBT\n");
810 return;
811 }
812 dev_priv->vbt.child_dev = kcalloc(count, sizeof(*p_child), GFP_KERNEL);
813 if (!dev_priv->vbt.child_dev) {
814 DRM_DEBUG_KMS("No memory space for child device\n");
815 return;
816 }
817
818 dev_priv->vbt.child_dev_num = count;
819 count = 0;
820 for (i = 0; i < child_device_num; i++) {
821 p_child = &(p_defs->devices[i]);
822 if (!p_child->common.device_type) {
823 /* skip the device block if device type is invalid */
824 continue;
825 }
826 child_dev_ptr = dev_priv->vbt.child_dev + count;
827 count++;
828 memcpy((void *)child_dev_ptr, (void *)p_child,
829 sizeof(*p_child));
830 }
831 return;
832}
833
834static void
835init_vbt_defaults(struct drm_i915_private *dev_priv)
836{
837 struct drm_device *dev = dev_priv->dev;
838 enum port port;
839
840 dev_priv->vbt.crt_ddc_pin = GMBUS_PORT_VGADDC;
841
842 /* LFP panel data */
843 dev_priv->vbt.lvds_dither = 1;
844 dev_priv->vbt.lvds_vbt = 0;
845
846 /* SDVO panel data */
847 dev_priv->vbt.sdvo_lvds_vbt_mode = NULL;
848
849 /* general features */
850 dev_priv->vbt.int_tv_support = 1;
851 dev_priv->vbt.int_crt_support = 1;
852
853 /* Default to using SSC */
854 dev_priv->vbt.lvds_use_ssc = 1;
855 /*
856 * Core/SandyBridge/IvyBridge use alternative (120MHz) reference
857 * clock for LVDS.
858 */
859 dev_priv->vbt.lvds_ssc_freq = intel_bios_ssc_frequency(dev,
860 !HAS_PCH_SPLIT(dev));
861 DRM_DEBUG_KMS("Set default to SSC at %d kHz\n", dev_priv->vbt.lvds_ssc_freq);
862
863 for (port = PORT_A; port < I915_MAX_PORTS; port++) {
864 struct ddi_vbt_port_info *info =
865 &dev_priv->vbt.ddi_port_info[port];
866
867 /* Recommended BSpec default: 800mV 0dB. */
868 info->hdmi_level_shift = 6;
869
870 info->supports_dvi = (port != PORT_A && port != PORT_E);
871 info->supports_hdmi = info->supports_dvi;
872 info->supports_dp = (port != PORT_E);
873 }
874}
875
876static int __init intel_no_opregion_vbt_callback(const struct dmi_system_id *id)
877{
878 DRM_DEBUG_KMS("Falling back to manually reading VBT from "
879 "VBIOS ROM for %s\n",
880 id->ident);
881 return 1;
882}
883
884static const struct dmi_system_id intel_no_opregion_vbt[] = {
885 {
886 .callback = intel_no_opregion_vbt_callback,
887 .ident = "ThinkCentre A57",
888 .matches = {
889 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
890 DMI_MATCH(DMI_PRODUCT_NAME, "97027RG"),
891 },
892 },
893 { }
894};
895
896/**
897 * intel_parse_bios - find VBT and initialize settings from the BIOS
898 * @dev: DRM device
899 *
900 * Loads the Video BIOS and checks that the VBT exists. Sets scratch registers
901 * to appropriate values.
902 *
903 * Returns 0 on success, nonzero on failure.
904 */
905int
906intel_parse_bios(struct drm_device *dev)
907{
908 struct drm_i915_private *dev_priv = dev->dev_private;
909 struct pci_dev *pdev = dev->pdev;
910 struct bdb_header *bdb = NULL;
911 u8 __iomem *bios = NULL;
912
913 if (HAS_PCH_NOP(dev))
914 return -ENODEV;
915
916 init_vbt_defaults(dev_priv);
917
918 /* XXX Should this validation be moved to intel_opregion.c? */
919 if (!dmi_check_system(intel_no_opregion_vbt) && dev_priv->opregion.vbt) {
920 struct vbt_header *vbt = dev_priv->opregion.vbt;
921 if (memcmp(vbt->signature, "$VBT", 4) == 0) {
922 DRM_DEBUG_KMS("Using VBT from OpRegion: %20s\n",
923 vbt->signature);
924 bdb = (struct bdb_header *)((char *)vbt + vbt->bdb_offset);
925 } else
926 dev_priv->opregion.vbt = NULL;
927 }
928
929 if (bdb == NULL) {
930 struct vbt_header *vbt = NULL;
931 size_t size;
932 int i;
933
934 bios = pci_map_rom(pdev, &size);
935 if (!bios)
936 return -1;
937
938 /* Scour memory looking for the VBT signature */
939 for (i = 0; i + 4 < size; i++) {
940 if (!memcmp(bios + i, "$VBT", 4)) {
941 vbt = (struct vbt_header *)(bios + i);
942 break;
943 }
944 }
945
946 if (!vbt) {
947 DRM_DEBUG_DRIVER("VBT signature missing\n");
948 pci_unmap_rom(pdev, bios);
949 return -1;
950 }
951
952 bdb = (struct bdb_header *)(bios + i + vbt->bdb_offset);
953 }
954
955 /* Grab useful general definitions */
956 parse_general_features(dev_priv, bdb);
957 parse_general_definitions(dev_priv, bdb);
958 parse_lfp_panel_data(dev_priv, bdb);
959 parse_lfp_backlight(dev_priv, bdb);
960 parse_sdvo_panel_data(dev_priv, bdb);
961 parse_sdvo_device_mapping(dev_priv, bdb);
962 parse_device_mapping(dev_priv, bdb);
963 parse_driver_features(dev_priv, bdb);
964 parse_edp(dev_priv, bdb);
965 parse_mipi(dev_priv, bdb);
966 parse_ddi_ports(dev_priv, bdb);
967
968 if (bios)
969 pci_unmap_rom(pdev, bios);
970
971 return 0;
972}
973
974/* Ensure that vital registers have been initialised, even if the BIOS
975 * is absent or just failing to do its job.
976 */
977void intel_setup_bios(struct drm_device *dev)
978{
979 struct drm_i915_private *dev_priv = dev->dev_private;
980
981 /* Set the Panel Power On/Off timings if uninitialized. */
982 if (!HAS_PCH_SPLIT(dev) &&
983 I915_READ(PP_ON_DELAYS) == 0 && I915_READ(PP_OFF_DELAYS) == 0) {
984 /* Set T2 to 40ms and T5 to 200ms */
985 I915_WRITE(PP_ON_DELAYS, 0x019007d0);
986
987 /* Set T3 to 35ms and Tx to 200ms */
988 I915_WRITE(PP_OFF_DELAYS, 0x015e07d0);
989 }
990}