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 <[email protected]>
25 *
26 */
27
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
30
31 #include <dev/drm2/drmP.h>
32 #include <dev/drm2/drm_dp_helper.h>
33 #include <dev/drm2/i915/i915_drm.h>
34 #include <dev/drm2/i915/i915_drv.h>
35 #include <dev/drm2/i915/intel_bios.h>
36
37 #define SLAVE_ADDR1 0x70
38 #define SLAVE_ADDR2 0x72
39
40 static int panel_type;
41
42 static void *
find_section(struct bdb_header * bdb,int section_id)43 find_section(struct bdb_header *bdb, int section_id)
44 {
45 u8 *base = (u8 *)bdb;
46 int index = 0;
47 u16 total, current_size;
48 u8 current_id;
49
50 /* skip to first section */
51 index += bdb->header_size;
52 total = bdb->bdb_size;
53
54 /* walk the sections looking for section_id */
55 while (index < total) {
56 current_id = *(base + index);
57 index++;
58 current_size = *((u16 *)(base + index));
59 index += 2;
60 if (current_id == section_id)
61 return base + index;
62 index += current_size;
63 }
64
65 return NULL;
66 }
67
68 static u16
get_blocksize(void * p)69 get_blocksize(void *p)
70 {
71 u16 *block_ptr, block_size;
72
73 block_ptr = (u16 *)((char *)p - 2);
74 block_size = *block_ptr;
75 return block_size;
76 }
77
78 static void
fill_detail_timing_data(struct drm_display_mode * panel_fixed_mode,const struct lvds_dvo_timing * dvo_timing)79 fill_detail_timing_data(struct drm_display_mode *panel_fixed_mode,
80 const struct lvds_dvo_timing *dvo_timing)
81 {
82 panel_fixed_mode->hdisplay = (dvo_timing->hactive_hi << 8) |
83 dvo_timing->hactive_lo;
84 panel_fixed_mode->hsync_start = panel_fixed_mode->hdisplay +
85 ((dvo_timing->hsync_off_hi << 8) | dvo_timing->hsync_off_lo);
86 panel_fixed_mode->hsync_end = panel_fixed_mode->hsync_start +
87 dvo_timing->hsync_pulse_width;
88 panel_fixed_mode->htotal = panel_fixed_mode->hdisplay +
89 ((dvo_timing->hblank_hi << 8) | dvo_timing->hblank_lo);
90
91 panel_fixed_mode->vdisplay = (dvo_timing->vactive_hi << 8) |
92 dvo_timing->vactive_lo;
93 panel_fixed_mode->vsync_start = panel_fixed_mode->vdisplay +
94 dvo_timing->vsync_off;
95 panel_fixed_mode->vsync_end = panel_fixed_mode->vsync_start +
96 dvo_timing->vsync_pulse_width;
97 panel_fixed_mode->vtotal = panel_fixed_mode->vdisplay +
98 ((dvo_timing->vblank_hi << 8) | dvo_timing->vblank_lo);
99 panel_fixed_mode->clock = dvo_timing->clock * 10;
100 panel_fixed_mode->type = DRM_MODE_TYPE_PREFERRED;
101
102 if (dvo_timing->hsync_positive)
103 panel_fixed_mode->flags |= DRM_MODE_FLAG_PHSYNC;
104 else
105 panel_fixed_mode->flags |= DRM_MODE_FLAG_NHSYNC;
106
107 if (dvo_timing->vsync_positive)
108 panel_fixed_mode->flags |= DRM_MODE_FLAG_PVSYNC;
109 else
110 panel_fixed_mode->flags |= DRM_MODE_FLAG_NVSYNC;
111
112 /* Some VBTs have bogus h/vtotal values */
113 if (panel_fixed_mode->hsync_end > panel_fixed_mode->htotal)
114 panel_fixed_mode->htotal = panel_fixed_mode->hsync_end + 1;
115 if (panel_fixed_mode->vsync_end > panel_fixed_mode->vtotal)
116 panel_fixed_mode->vtotal = panel_fixed_mode->vsync_end + 1;
117
118 drm_mode_set_name(panel_fixed_mode);
119 }
120
121 static bool
lvds_dvo_timing_equal_size(const struct lvds_dvo_timing * a,const struct lvds_dvo_timing * b)122 lvds_dvo_timing_equal_size(const struct lvds_dvo_timing *a,
123 const struct lvds_dvo_timing *b)
124 {
125 if (a->hactive_hi != b->hactive_hi ||
126 a->hactive_lo != b->hactive_lo)
127 return false;
128
129 if (a->hsync_off_hi != b->hsync_off_hi ||
130 a->hsync_off_lo != b->hsync_off_lo)
131 return false;
132
133 if (a->hsync_pulse_width != b->hsync_pulse_width)
134 return false;
135
136 if (a->hblank_hi != b->hblank_hi ||
137 a->hblank_lo != b->hblank_lo)
138 return false;
139
140 if (a->vactive_hi != b->vactive_hi ||
141 a->vactive_lo != b->vactive_lo)
142 return false;
143
144 if (a->vsync_off != b->vsync_off)
145 return false;
146
147 if (a->vsync_pulse_width != b->vsync_pulse_width)
148 return false;
149
150 if (a->vblank_hi != b->vblank_hi ||
151 a->vblank_lo != b->vblank_lo)
152 return false;
153
154 return true;
155 }
156
157 static const struct lvds_dvo_timing *
get_lvds_dvo_timing(const struct bdb_lvds_lfp_data * lvds_lfp_data,const struct bdb_lvds_lfp_data_ptrs * lvds_lfp_data_ptrs,int index)158 get_lvds_dvo_timing(const struct bdb_lvds_lfp_data *lvds_lfp_data,
159 const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs,
160 int index)
161 {
162 /*
163 * the size of fp_timing varies on the different platform.
164 * So calculate the DVO timing relative offset in LVDS data
165 * entry to get the DVO timing entry
166 */
167
168 int lfp_data_size =
169 lvds_lfp_data_ptrs->ptr[1].dvo_timing_offset -
170 lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset;
171 int dvo_timing_offset =
172 lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset -
173 lvds_lfp_data_ptrs->ptr[0].fp_timing_offset;
174 const char *entry = (const char *)lvds_lfp_data->data + lfp_data_size * index;
175
176 return (const struct lvds_dvo_timing *)(entry + dvo_timing_offset);
177 }
178
179 /* get lvds_fp_timing entry
180 * this function may return NULL if the corresponding entry is invalid
181 */
182 static const struct lvds_fp_timing *
get_lvds_fp_timing(const struct bdb_header * bdb,const struct bdb_lvds_lfp_data * data,const struct bdb_lvds_lfp_data_ptrs * ptrs,int index)183 get_lvds_fp_timing(const struct bdb_header *bdb,
184 const struct bdb_lvds_lfp_data *data,
185 const struct bdb_lvds_lfp_data_ptrs *ptrs,
186 int index)
187 {
188 size_t data_ofs = (const u8 *)data - (const u8 *)bdb;
189 u16 data_size = ((const u16 *)data)[-1]; /* stored in header */
190 size_t ofs;
191
192 if (index >= ARRAY_SIZE(ptrs->ptr))
193 return NULL;
194 ofs = ptrs->ptr[index].fp_timing_offset;
195 if (ofs < data_ofs ||
196 ofs + sizeof(struct lvds_fp_timing) > data_ofs + data_size)
197 return NULL;
198 return (const struct lvds_fp_timing *)((const u8 *)bdb + ofs);
199 }
200
201 /* Try to find integrated panel data */
202 static void
parse_lfp_panel_data(struct drm_i915_private * dev_priv,struct bdb_header * bdb)203 parse_lfp_panel_data(struct drm_i915_private *dev_priv,
204 struct bdb_header *bdb)
205 {
206 const struct bdb_lvds_options *lvds_options;
207 const struct bdb_lvds_lfp_data *lvds_lfp_data;
208 const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs;
209 const struct lvds_dvo_timing *panel_dvo_timing;
210 const struct lvds_fp_timing *fp_timing;
211 struct drm_display_mode *panel_fixed_mode;
212 int i, downclock;
213
214 lvds_options = find_section(bdb, BDB_LVDS_OPTIONS);
215 if (!lvds_options)
216 return;
217
218 dev_priv->lvds_dither = lvds_options->pixel_dither;
219 if (lvds_options->panel_type == 0xff)
220 return;
221
222 panel_type = lvds_options->panel_type;
223
224 lvds_lfp_data = find_section(bdb, BDB_LVDS_LFP_DATA);
225 if (!lvds_lfp_data)
226 return;
227
228 lvds_lfp_data_ptrs = find_section(bdb, BDB_LVDS_LFP_DATA_PTRS);
229 if (!lvds_lfp_data_ptrs)
230 return;
231
232 dev_priv->lvds_vbt = 1;
233
234 panel_dvo_timing = get_lvds_dvo_timing(lvds_lfp_data,
235 lvds_lfp_data_ptrs,
236 lvds_options->panel_type);
237
238 panel_fixed_mode = malloc(sizeof(*panel_fixed_mode), DRM_MEM_KMS, M_WAITOK | M_ZERO);
239 if (!panel_fixed_mode)
240 return;
241
242 fill_detail_timing_data(panel_fixed_mode, panel_dvo_timing);
243
244 dev_priv->lfp_lvds_vbt_mode = panel_fixed_mode;
245
246 DRM_DEBUG_KMS("Found panel mode in BIOS VBT tables:\n");
247 drm_mode_debug_printmodeline(panel_fixed_mode);
248
249 /*
250 * Iterate over the LVDS panel timing info to find the lowest clock
251 * for the native resolution.
252 */
253 downclock = panel_dvo_timing->clock;
254 for (i = 0; i < 16; i++) {
255 const struct lvds_dvo_timing *dvo_timing;
256
257 dvo_timing = get_lvds_dvo_timing(lvds_lfp_data,
258 lvds_lfp_data_ptrs,
259 i);
260 if (lvds_dvo_timing_equal_size(dvo_timing, panel_dvo_timing) &&
261 dvo_timing->clock < downclock)
262 downclock = dvo_timing->clock;
263 }
264
265 if (downclock < panel_dvo_timing->clock && i915_lvds_downclock) {
266 dev_priv->lvds_downclock_avail = 1;
267 dev_priv->lvds_downclock = downclock * 10;
268 DRM_DEBUG_KMS("LVDS downclock is found in VBT. "
269 "Normal Clock %dKHz, downclock %dKHz\n",
270 panel_fixed_mode->clock, 10*downclock);
271 }
272
273 fp_timing = get_lvds_fp_timing(bdb, lvds_lfp_data,
274 lvds_lfp_data_ptrs,
275 lvds_options->panel_type);
276 if (fp_timing) {
277 /* check the resolution, just to be sure */
278 if (fp_timing->x_res == panel_fixed_mode->hdisplay &&
279 fp_timing->y_res == panel_fixed_mode->vdisplay) {
280 dev_priv->bios_lvds_val = fp_timing->lvds_reg_val;
281 DRM_DEBUG_KMS("VBT initial LVDS value %x\n",
282 dev_priv->bios_lvds_val);
283 }
284 }
285 }
286
287 /* Try to find sdvo panel data */
288 static void
parse_sdvo_panel_data(struct drm_i915_private * dev_priv,struct bdb_header * bdb)289 parse_sdvo_panel_data(struct drm_i915_private *dev_priv,
290 struct bdb_header *bdb)
291 {
292 struct lvds_dvo_timing *dvo_timing;
293 struct drm_display_mode *panel_fixed_mode;
294 int index;
295
296 index = i915_vbt_sdvo_panel_type;
297 if (index == -2) {
298 DRM_DEBUG_KMS("Ignore SDVO panel mode from BIOS VBT tables.\n");
299 return;
300 }
301
302 if (index == -1) {
303 struct bdb_sdvo_lvds_options *sdvo_lvds_options;
304
305 sdvo_lvds_options = find_section(bdb, BDB_SDVO_LVDS_OPTIONS);
306 if (!sdvo_lvds_options)
307 return;
308
309 index = sdvo_lvds_options->panel_type;
310 }
311
312 dvo_timing = find_section(bdb, BDB_SDVO_PANEL_DTDS);
313 if (!dvo_timing)
314 return;
315
316 panel_fixed_mode = malloc(sizeof(*panel_fixed_mode), DRM_MEM_KMS, M_WAITOK | M_ZERO);
317 if (!panel_fixed_mode)
318 return;
319
320 fill_detail_timing_data(panel_fixed_mode, dvo_timing + index);
321
322 dev_priv->sdvo_lvds_vbt_mode = panel_fixed_mode;
323
324 DRM_DEBUG_KMS("Found SDVO panel mode in BIOS VBT tables:\n");
325 drm_mode_debug_printmodeline(panel_fixed_mode);
326 }
327
intel_bios_ssc_frequency(struct drm_device * dev,bool alternate)328 static int intel_bios_ssc_frequency(struct drm_device *dev,
329 bool alternate)
330 {
331 switch (INTEL_INFO(dev)->gen) {
332 case 2:
333 return alternate ? 66 : 48;
334 case 3:
335 case 4:
336 return alternate ? 100 : 96;
337 default:
338 return alternate ? 100 : 120;
339 }
340 }
341
342 static void
parse_general_features(struct drm_i915_private * dev_priv,struct bdb_header * bdb)343 parse_general_features(struct drm_i915_private *dev_priv,
344 struct bdb_header *bdb)
345 {
346 struct drm_device *dev = dev_priv->dev;
347 struct bdb_general_features *general;
348
349 general = find_section(bdb, BDB_GENERAL_FEATURES);
350 if (general) {
351 dev_priv->int_tv_support = general->int_tv_support;
352 dev_priv->int_crt_support = general->int_crt_support;
353 dev_priv->lvds_use_ssc = general->enable_ssc;
354 dev_priv->lvds_ssc_freq =
355 intel_bios_ssc_frequency(dev, general->ssc_freq);
356 dev_priv->display_clock_mode = general->display_clock_mode;
357 dev_priv->fdi_rx_polarity_inverted = general->fdi_rx_polarity_inverted;
358 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",
359 dev_priv->int_tv_support,
360 dev_priv->int_crt_support,
361 dev_priv->lvds_use_ssc,
362 dev_priv->lvds_ssc_freq,
363 dev_priv->display_clock_mode,
364 dev_priv->fdi_rx_polarity_inverted);
365 }
366 }
367
368 static void
parse_general_definitions(struct drm_i915_private * dev_priv,struct bdb_header * bdb)369 parse_general_definitions(struct drm_i915_private *dev_priv,
370 struct bdb_header *bdb)
371 {
372 struct bdb_general_definitions *general;
373
374 general = find_section(bdb, BDB_GENERAL_DEFINITIONS);
375 if (general) {
376 u16 block_size = get_blocksize(general);
377 if (block_size >= sizeof(*general)) {
378 int bus_pin = general->crt_ddc_gmbus_pin;
379 DRM_DEBUG_KMS("crt_ddc_bus_pin: %d\n", bus_pin);
380 if (intel_gmbus_is_port_valid(bus_pin))
381 dev_priv->crt_ddc_pin = bus_pin;
382 } else {
383 DRM_DEBUG_KMS("BDB_GD too small (%d). Invalid.\n",
384 block_size);
385 }
386 }
387 }
388
389 static void
parse_sdvo_device_mapping(struct drm_i915_private * dev_priv,struct bdb_header * bdb)390 parse_sdvo_device_mapping(struct drm_i915_private *dev_priv,
391 struct bdb_header *bdb)
392 {
393 struct sdvo_device_mapping *p_mapping;
394 struct bdb_general_definitions *p_defs;
395 struct child_device_config *p_child;
396 int i, child_device_num, count;
397 u16 block_size;
398
399 p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
400 if (!p_defs) {
401 DRM_DEBUG_KMS("No general definition block is found, unable to construct sdvo mapping.\n");
402 return;
403 }
404 /* judge whether the size of child device meets the requirements.
405 * If the child device size obtained from general definition block
406 * is different with sizeof(struct child_device_config), skip the
407 * parsing of sdvo device info
408 */
409 if (p_defs->child_dev_size != sizeof(*p_child)) {
410 /* different child dev size . Ignore it */
411 DRM_DEBUG_KMS("different child size is found. Invalid.\n");
412 return;
413 }
414 /* get the block size of general definitions */
415 block_size = get_blocksize(p_defs);
416 /* get the number of child device */
417 child_device_num = (block_size - sizeof(*p_defs)) /
418 sizeof(*p_child);
419 count = 0;
420 for (i = 0; i < child_device_num; i++) {
421 p_child = &(p_defs->devices[i]);
422 if (!p_child->device_type) {
423 /* skip the device block if device type is invalid */
424 continue;
425 }
426 if (p_child->slave_addr != SLAVE_ADDR1 &&
427 p_child->slave_addr != SLAVE_ADDR2) {
428 /*
429 * If the slave address is neither 0x70 nor 0x72,
430 * it is not a SDVO device. Skip it.
431 */
432 continue;
433 }
434 if (p_child->dvo_port != DEVICE_PORT_DVOB &&
435 p_child->dvo_port != DEVICE_PORT_DVOC) {
436 /* skip the incorrect SDVO port */
437 DRM_DEBUG_KMS("Incorrect SDVO port. Skip it\n");
438 continue;
439 }
440 DRM_DEBUG_KMS("the SDVO device with slave addr %2x is found on"
441 " %s port\n",
442 p_child->slave_addr,
443 (p_child->dvo_port == DEVICE_PORT_DVOB) ?
444 "SDVOB" : "SDVOC");
445 p_mapping = &(dev_priv->sdvo_mappings[p_child->dvo_port - 1]);
446 if (!p_mapping->initialized) {
447 p_mapping->dvo_port = p_child->dvo_port;
448 p_mapping->slave_addr = p_child->slave_addr;
449 p_mapping->dvo_wiring = p_child->dvo_wiring;
450 p_mapping->ddc_pin = p_child->ddc_pin;
451 p_mapping->i2c_pin = p_child->i2c_pin;
452 p_mapping->initialized = 1;
453 DRM_DEBUG_KMS("SDVO device: dvo=%x, addr=%x, wiring=%d, ddc_pin=%d, i2c_pin=%d\n",
454 p_mapping->dvo_port,
455 p_mapping->slave_addr,
456 p_mapping->dvo_wiring,
457 p_mapping->ddc_pin,
458 p_mapping->i2c_pin);
459 } else {
460 DRM_DEBUG_KMS("Maybe one SDVO port is shared by "
461 "two SDVO device.\n");
462 }
463 if (p_child->slave2_addr) {
464 /* Maybe this is a SDVO device with multiple inputs */
465 /* And the mapping info is not added */
466 DRM_DEBUG_KMS("there exists the slave2_addr. Maybe this"
467 " is a SDVO device with multiple inputs.\n");
468 }
469 count++;
470 }
471
472 if (!count) {
473 /* No SDVO device info is found */
474 DRM_DEBUG_KMS("No SDVO device info is found in VBT\n");
475 }
476 return;
477 }
478
479 static void
parse_driver_features(struct drm_i915_private * dev_priv,struct bdb_header * bdb)480 parse_driver_features(struct drm_i915_private *dev_priv,
481 struct bdb_header *bdb)
482 {
483 struct drm_device *dev = dev_priv->dev;
484 struct bdb_driver_features *driver;
485
486 driver = find_section(bdb, BDB_DRIVER_FEATURES);
487 if (!driver)
488 return;
489
490 if (SUPPORTS_EDP(dev) &&
491 driver->lvds_config == BDB_DRIVER_FEATURE_EDP)
492 dev_priv->edp.support = 1;
493
494 if (driver->dual_frequency)
495 dev_priv->render_reclock_avail = true;
496 }
497
498 static void
parse_edp(struct drm_i915_private * dev_priv,struct bdb_header * bdb)499 parse_edp(struct drm_i915_private *dev_priv, struct bdb_header *bdb)
500 {
501 struct bdb_edp *edp;
502 struct edp_power_seq *edp_pps;
503 struct edp_link_params *edp_link_params;
504
505 edp = find_section(bdb, BDB_EDP);
506 if (!edp) {
507 if (SUPPORTS_EDP(dev_priv->dev) && dev_priv->edp.support)
508 DRM_DEBUG_KMS("No eDP BDB found but eDP panel supported.\n");
509 return;
510 }
511
512 switch ((edp->color_depth >> (panel_type * 2)) & 3) {
513 case EDP_18BPP:
514 dev_priv->edp.bpp = 18;
515 break;
516 case EDP_24BPP:
517 dev_priv->edp.bpp = 24;
518 break;
519 case EDP_30BPP:
520 dev_priv->edp.bpp = 30;
521 break;
522 }
523
524 /* Get the eDP sequencing and link info */
525 edp_pps = &edp->power_seqs[panel_type];
526 edp_link_params = &edp->link_params[panel_type];
527
528 dev_priv->edp.pps = *edp_pps;
529
530 dev_priv->edp.rate = edp_link_params->rate ? DP_LINK_BW_2_7 :
531 DP_LINK_BW_1_62;
532 switch (edp_link_params->lanes) {
533 case 0:
534 dev_priv->edp.lanes = 1;
535 break;
536 case 1:
537 dev_priv->edp.lanes = 2;
538 break;
539 case 3:
540 default:
541 dev_priv->edp.lanes = 4;
542 break;
543 }
544 switch (edp_link_params->preemphasis) {
545 case 0:
546 dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPHASIS_0;
547 break;
548 case 1:
549 dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPHASIS_3_5;
550 break;
551 case 2:
552 dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPHASIS_6;
553 break;
554 case 3:
555 dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPHASIS_9_5;
556 break;
557 }
558 switch (edp_link_params->vswing) {
559 case 0:
560 dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_400;
561 break;
562 case 1:
563 dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_600;
564 break;
565 case 2:
566 dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_800;
567 break;
568 case 3:
569 dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_1200;
570 break;
571 }
572 }
573
574 static void
parse_device_mapping(struct drm_i915_private * dev_priv,struct bdb_header * bdb)575 parse_device_mapping(struct drm_i915_private *dev_priv,
576 struct bdb_header *bdb)
577 {
578 struct bdb_general_definitions *p_defs;
579 struct child_device_config *p_child, *child_dev_ptr;
580 int i, child_device_num, count;
581 u16 block_size;
582
583 p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
584 if (!p_defs) {
585 DRM_DEBUG_KMS("No general definition block is found, no devices defined.\n");
586 return;
587 }
588 /* judge whether the size of child device meets the requirements.
589 * If the child device size obtained from general definition block
590 * is different with sizeof(struct child_device_config), skip the
591 * parsing of sdvo device info
592 */
593 if (p_defs->child_dev_size != sizeof(*p_child)) {
594 /* different child dev size . Ignore it */
595 DRM_DEBUG_KMS("different child size is found. Invalid.\n");
596 return;
597 }
598 /* get the block size of general definitions */
599 block_size = get_blocksize(p_defs);
600 /* get the number of child device */
601 child_device_num = (block_size - sizeof(*p_defs)) /
602 sizeof(*p_child);
603 count = 0;
604 /* get the number of child device that is present */
605 for (i = 0; i < child_device_num; i++) {
606 p_child = &(p_defs->devices[i]);
607 if (!p_child->device_type) {
608 /* skip the device block if device type is invalid */
609 continue;
610 }
611 count++;
612 }
613 if (!count) {
614 DRM_DEBUG_KMS("no child dev is parsed from VBT\n");
615 return;
616 }
617 dev_priv->child_dev = malloc(count * sizeof(*p_child), DRM_MEM_KMS, M_WAITOK | M_ZERO);
618 if (!dev_priv->child_dev) {
619 DRM_DEBUG_KMS("No memory space for child device\n");
620 return;
621 }
622
623 dev_priv->child_dev_num = count;
624 count = 0;
625 for (i = 0; i < child_device_num; i++) {
626 p_child = &(p_defs->devices[i]);
627 if (!p_child->device_type) {
628 /* skip the device block if device type is invalid */
629 continue;
630 }
631 child_dev_ptr = dev_priv->child_dev + count;
632 count++;
633 memcpy((void *)child_dev_ptr, (void *)p_child,
634 sizeof(*p_child));
635 }
636 return;
637 }
638
639 static void
init_vbt_defaults(struct drm_i915_private * dev_priv)640 init_vbt_defaults(struct drm_i915_private *dev_priv)
641 {
642 struct drm_device *dev = dev_priv->dev;
643
644 dev_priv->crt_ddc_pin = GMBUS_PORT_VGADDC;
645
646 /* LFP panel data */
647 dev_priv->lvds_dither = 1;
648 dev_priv->lvds_vbt = 0;
649
650 /* SDVO panel data */
651 dev_priv->sdvo_lvds_vbt_mode = NULL;
652
653 /* general features */
654 dev_priv->int_tv_support = 1;
655 dev_priv->int_crt_support = 1;
656
657 /* Default to using SSC */
658 dev_priv->lvds_use_ssc = 1;
659 dev_priv->lvds_ssc_freq = intel_bios_ssc_frequency(dev, 1);
660 DRM_DEBUG_KMS("Set default to SSC at %dMHz\n", dev_priv->lvds_ssc_freq);
661 }
662
intel_no_opregion_vbt_callback(const struct dmi_system_id * id)663 static int __init intel_no_opregion_vbt_callback(const struct dmi_system_id *id)
664 {
665 DRM_DEBUG_KMS("Falling back to manually reading VBT from "
666 "VBIOS ROM for %s\n",
667 id->ident);
668 return 1;
669 }
670
671 static const struct dmi_system_id intel_no_opregion_vbt[] = {
672 {
673 .callback = intel_no_opregion_vbt_callback,
674 .ident = "ThinkCentre A57",
675 .matches = {
676 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
677 DMI_MATCH(DMI_PRODUCT_NAME, "97027RG"),
678 },
679 },
680 { }
681 };
682
683 /**
684 * intel_parse_bios - find VBT and initialize settings from the BIOS
685 * @dev: DRM device
686 *
687 * Loads the Video BIOS and checks that the VBT exists. Sets scratch registers
688 * to appropriate values.
689 *
690 * Returns 0 on success, nonzero on failure.
691 */
692 int
intel_parse_bios(struct drm_device * dev)693 intel_parse_bios(struct drm_device *dev)
694 {
695 struct drm_i915_private *dev_priv = dev->dev_private;
696 device_t vga_dev = device_get_parent(dev->dev);;
697 struct bdb_header *bdb = NULL;
698 u8 __iomem *bios = NULL;
699
700 init_vbt_defaults(dev_priv);
701
702 /* XXX Should this validation be moved to intel_opregion.c? */
703 if (!dmi_check_system(intel_no_opregion_vbt) && dev_priv->opregion.vbt) {
704 struct vbt_header *vbt = dev_priv->opregion.vbt;
705 if (memcmp(vbt->signature, "$VBT", 4) == 0) {
706 DRM_DEBUG_KMS("Using VBT from OpRegion: %20s\n",
707 vbt->signature);
708 bdb = (struct bdb_header *)((char *)vbt + vbt->bdb_offset);
709 } else
710 dev_priv->opregion.vbt = NULL;
711 }
712
713 if (bdb == NULL) {
714 struct vbt_header *vbt = NULL;
715 size_t size;
716 int i;
717
718 bios = vga_pci_map_bios(vga_dev, &size);
719 if (!bios)
720 return -1;
721
722 /* Scour memory looking for the VBT signature */
723 for (i = 0; i + 4 < size; i++) {
724 if (!memcmp(bios + i, "$VBT", 4)) {
725 vbt = (struct vbt_header *)(bios + i);
726 break;
727 }
728 }
729
730 if (!vbt) {
731 DRM_DEBUG_DRIVER("VBT signature missing\n");
732 vga_pci_unmap_bios(vga_dev, bios);
733 return -1;
734 }
735
736 bdb = (struct bdb_header *)(bios + i + vbt->bdb_offset);
737 }
738
739 /* Grab useful general definitions */
740 parse_general_features(dev_priv, bdb);
741 parse_general_definitions(dev_priv, bdb);
742 parse_lfp_panel_data(dev_priv, bdb);
743 parse_sdvo_panel_data(dev_priv, bdb);
744 parse_sdvo_device_mapping(dev_priv, bdb);
745 parse_device_mapping(dev_priv, bdb);
746 parse_driver_features(dev_priv, bdb);
747 parse_edp(dev_priv, bdb);
748
749 if (bios)
750 vga_pci_unmap_bios(vga_dev, bios);
751
752 return 0;
753 }
754
755 /*
756 * NOTE Linux<->FreeBSD:
757 * Apparently, Linux doesn't free those pointers.
758 * TODO: Report that upstream.
759 */
760 void
intel_free_parsed_bios_data(struct drm_device * dev)761 intel_free_parsed_bios_data(struct drm_device *dev)
762 {
763 struct drm_i915_private *dev_priv = dev->dev_private;
764
765 free(dev_priv->lfp_lvds_vbt_mode, DRM_MEM_KMS);
766 free(dev_priv->sdvo_lvds_vbt_mode, DRM_MEM_KMS);
767 free(dev_priv->child_dev, DRM_MEM_KMS);
768
769 dev_priv->lfp_lvds_vbt_mode = NULL;
770 dev_priv->sdvo_lvds_vbt_mode = NULL;
771 dev_priv->child_dev = NULL;
772 }
773
774 /* Ensure that vital registers have been initialised, even if the BIOS
775 * is absent or just failing to do its job.
776 */
intel_setup_bios(struct drm_device * dev)777 void intel_setup_bios(struct drm_device *dev)
778 {
779 struct drm_i915_private *dev_priv = dev->dev_private;
780
781 /* Set the Panel Power On/Off timings if uninitialized. */
782 if (!HAS_PCH_SPLIT(dev) &&
783 I915_READ(PP_ON_DELAYS) == 0 && I915_READ(PP_OFF_DELAYS) == 0) {
784 /* Set T2 to 40ms and T5 to 200ms */
785 I915_WRITE(PP_ON_DELAYS, 0x019007d0);
786
787 /* Set T3 to 35ms and Tx to 200ms */
788 I915_WRITE(PP_OFF_DELAYS, 0x015e07d0);
789 }
790 }
791