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#ifdef __NetBSD__
172 const char *entry = (const char *)lvds_lfp_data->data +
173 lfp_data_size * index;
174
175 return (const struct lvds_dvo_timing *)(entry + dvo_timing_offset);
176#else
177 char *entry = (char *)lvds_lfp_data->data + lfp_data_size * index;
178
179 return (struct lvds_dvo_timing *)(entry + dvo_timing_offset);
180#endif
181}
182
183/* get lvds_fp_timing entry
184 * this function may return NULL if the corresponding entry is invalid
185 */
186static const struct lvds_fp_timing *
187get_lvds_fp_timing(const struct bdb_header *bdb,
188 const struct bdb_lvds_lfp_data *data,
189 const struct bdb_lvds_lfp_data_ptrs *ptrs,
190 int index)
191{
192 size_t data_ofs = (const u8 *)data - (const u8 *)bdb;
193 u16 data_size = ((const u16 *)data)[-1]; /* stored in header */
194 size_t ofs;
195
196 if (index >= ARRAY_SIZE(ptrs->ptr))
197 return NULL;
198 ofs = ptrs->ptr[index].fp_timing_offset;
199 if (ofs < data_ofs ||
200 ofs + sizeof(struct lvds_fp_timing) > data_ofs + data_size)
201 return NULL;
202 return (const struct lvds_fp_timing *)((const u8 *)bdb + ofs);
203}
204
205/* Try to find integrated panel data */
206static void
207parse_lfp_panel_data(struct drm_i915_private *dev_priv,
208 struct bdb_header *bdb)
209{
210 const struct bdb_lvds_options *lvds_options;
211 const struct bdb_lvds_lfp_data *lvds_lfp_data;
212 const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs;
213 const struct lvds_dvo_timing *panel_dvo_timing;
214 const struct lvds_fp_timing *fp_timing;
215 struct drm_display_mode *panel_fixed_mode;
216 int i, downclock;
217
218 lvds_options = find_section(bdb, BDB_LVDS_OPTIONS);
219 if (!lvds_options)
220 return;
221
222 dev_priv->vbt.lvds_dither = lvds_options->pixel_dither;
223 if (lvds_options->panel_type == 0xff)
224 return;
225
226 panel_type = lvds_options->panel_type;
227
228 lvds_lfp_data = find_section(bdb, BDB_LVDS_LFP_DATA);
229 if (!lvds_lfp_data)
230 return;
231
232 lvds_lfp_data_ptrs = find_section(bdb, BDB_LVDS_LFP_DATA_PTRS);
233 if (!lvds_lfp_data_ptrs)
234 return;
235
236 dev_priv->vbt.lvds_vbt = 1;
237
238 panel_dvo_timing = get_lvds_dvo_timing(lvds_lfp_data,
239 lvds_lfp_data_ptrs,
240 lvds_options->panel_type);
241
242 panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
243 if (!panel_fixed_mode)
244 return;
245
246 fill_detail_timing_data(panel_fixed_mode, panel_dvo_timing);
247
248 dev_priv->vbt.lfp_lvds_vbt_mode = panel_fixed_mode;
249
250 DRM_DEBUG_KMS("Found panel mode in BIOS VBT tables:\n");
251 drm_mode_debug_printmodeline(panel_fixed_mode);
252
253 /*
254 * Iterate over the LVDS panel timing info to find the lowest clock
255 * for the native resolution.
256 */
257 downclock = panel_dvo_timing->clock;
258 for (i = 0; i < 16; i++) {
259 const struct lvds_dvo_timing *dvo_timing;
260
261 dvo_timing = get_lvds_dvo_timing(lvds_lfp_data,
262 lvds_lfp_data_ptrs,
263 i);
264 if (lvds_dvo_timing_equal_size(dvo_timing, panel_dvo_timing) &&
265 dvo_timing->clock < downclock)
266 downclock = dvo_timing->clock;
267 }
268
269 if (downclock < panel_dvo_timing->clock && i915.lvds_downclock) {
270 dev_priv->lvds_downclock_avail = 1;
271 dev_priv->lvds_downclock = downclock * 10;
272 DRM_DEBUG_KMS("LVDS downclock is found in VBT. "
273 "Normal Clock %dKHz, downclock %dKHz\n",
274 panel_fixed_mode->clock, 10*downclock);
275 }
276
277 fp_timing = get_lvds_fp_timing(bdb, lvds_lfp_data,
278 lvds_lfp_data_ptrs,
279 lvds_options->panel_type);
280 if (fp_timing) {
281 /* check the resolution, just to be sure */
282 if (fp_timing->x_res == panel_fixed_mode->hdisplay &&
283 fp_timing->y_res == panel_fixed_mode->vdisplay) {
284 dev_priv->vbt.bios_lvds_val = fp_timing->lvds_reg_val;
285 DRM_DEBUG_KMS("VBT initial LVDS value %x\n",
286 dev_priv->vbt.bios_lvds_val);
287 }
288 }
289}
290
291static void
292parse_lfp_backlight(struct drm_i915_private *dev_priv, struct bdb_header *bdb)
293{
294 const struct bdb_lfp_backlight_data *backlight_data;
295 const struct bdb_lfp_backlight_data_entry *entry;
296
297 /* Err to enabling backlight if no backlight block. */
298 dev_priv->vbt.backlight.present = true;
299
300 backlight_data = find_section(bdb, BDB_LVDS_BACKLIGHT);
301 if (!backlight_data)
302 return;
303
304 if (backlight_data->entry_size != sizeof(backlight_data->data[0])) {
305 DRM_DEBUG_KMS("Unsupported backlight data entry size %u\n",
306 backlight_data->entry_size);
307 return;
308 }
309
310 entry = &backlight_data->data[panel_type];
311
312 dev_priv->vbt.backlight.present = entry->type == BDB_BACKLIGHT_TYPE_PWM;
313 if (!dev_priv->vbt.backlight.present) {
314 DRM_DEBUG_KMS("PWM backlight not present in VBT (type %u)\n",
315 entry->type);
316 return;
317 }
318
319 dev_priv->vbt.backlight.pwm_freq_hz = entry->pwm_freq_hz;
320 dev_priv->vbt.backlight.active_low_pwm = entry->active_low_pwm;
321 DRM_DEBUG_KMS("VBT backlight PWM modulation frequency %u Hz, "
322 "active %s, min brightness %u, level %u\n",
323 dev_priv->vbt.backlight.pwm_freq_hz,
324 dev_priv->vbt.backlight.active_low_pwm ? "low" : "high",
325 entry->min_brightness,
326 backlight_data->level[panel_type]);
327}
328
329/* Try to find sdvo panel data */
330static void
331parse_sdvo_panel_data(struct drm_i915_private *dev_priv,
332 struct bdb_header *bdb)
333{
334 struct lvds_dvo_timing *dvo_timing;
335 struct drm_display_mode *panel_fixed_mode;
336 int index;
337
338 index = i915.vbt_sdvo_panel_type;
339 if (index == -2) {
340 DRM_DEBUG_KMS("Ignore SDVO panel mode from BIOS VBT tables.\n");
341 return;
342 }
343
344 if (index == -1) {
345 struct bdb_sdvo_lvds_options *sdvo_lvds_options;
346
347 sdvo_lvds_options = find_section(bdb, BDB_SDVO_LVDS_OPTIONS);
348 if (!sdvo_lvds_options)
349 return;
350
351 index = sdvo_lvds_options->panel_type;
352 }
353
354 dvo_timing = find_section(bdb, BDB_SDVO_PANEL_DTDS);
355 if (!dvo_timing)
356 return;
357
358 panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
359 if (!panel_fixed_mode)
360 return;
361
362 fill_detail_timing_data(panel_fixed_mode, dvo_timing + index);
363
364 dev_priv->vbt.sdvo_lvds_vbt_mode = panel_fixed_mode;
365
366 DRM_DEBUG_KMS("Found SDVO panel mode in BIOS VBT tables:\n");
367 drm_mode_debug_printmodeline(panel_fixed_mode);
368}
369
370static int intel_bios_ssc_frequency(struct drm_device *dev,
371 bool alternate)
372{
373 switch (INTEL_INFO(dev)->gen) {
374 case 2:
375 return alternate ? 66667 : 48000;
376 case 3:
377 case 4:
378 return alternate ? 100000 : 96000;
379 default:
380 return alternate ? 100000 : 120000;
381 }
382}
383
384static void
385parse_general_features(struct drm_i915_private *dev_priv,
386 struct bdb_header *bdb)
387{
388 struct drm_device *dev = dev_priv->dev;
389 struct bdb_general_features *general;
390
391 general = find_section(bdb, BDB_GENERAL_FEATURES);
392 if (general) {
393 dev_priv->vbt.int_tv_support = general->int_tv_support;
394 dev_priv->vbt.int_crt_support = general->int_crt_support;
395 dev_priv->vbt.lvds_use_ssc = general->enable_ssc;
396 dev_priv->vbt.lvds_ssc_freq =
397 intel_bios_ssc_frequency(dev, general->ssc_freq);
398 dev_priv->vbt.display_clock_mode = general->display_clock_mode;
399 dev_priv->vbt.fdi_rx_polarity_inverted = general->fdi_rx_polarity_inverted;
400 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",
401 dev_priv->vbt.int_tv_support,
402 dev_priv->vbt.int_crt_support,
403 dev_priv->vbt.lvds_use_ssc,
404 dev_priv->vbt.lvds_ssc_freq,
405 dev_priv->vbt.display_clock_mode,
406 dev_priv->vbt.fdi_rx_polarity_inverted);
407 }
408}
409
410static void
411parse_general_definitions(struct drm_i915_private *dev_priv,
412 struct bdb_header *bdb)
413{
414 struct bdb_general_definitions *general;
415
416 general = find_section(bdb, BDB_GENERAL_DEFINITIONS);
417 if (general) {
418 u16 block_size = get_blocksize(general);
419 if (block_size >= sizeof(*general)) {
420 int bus_pin = general->crt_ddc_gmbus_pin;
421 DRM_DEBUG_KMS("crt_ddc_bus_pin: %d\n", bus_pin);
422 if (intel_gmbus_is_port_valid(bus_pin))
423 dev_priv->vbt.crt_ddc_pin = bus_pin;
424 } else {
425 DRM_DEBUG_KMS("BDB_GD too small (%d). Invalid.\n",
426 block_size);
427 }
428 }
429}
430
431static void
432parse_sdvo_device_mapping(struct drm_i915_private *dev_priv,
433 struct bdb_header *bdb)
434{
435 struct sdvo_device_mapping *p_mapping;
436 struct bdb_general_definitions *p_defs;
437 union child_device_config *p_child;
438 int i, child_device_num, count;
439 u16 block_size;
440
441 p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
442 if (!p_defs) {
443 DRM_DEBUG_KMS("No general definition block is found, unable to construct sdvo mapping.\n");
444 return;
445 }
446 /* judge whether the size of child device meets the requirements.
447 * If the child device size obtained from general definition block
448 * is different with sizeof(struct child_device_config), skip the
449 * parsing of sdvo device info
450 */
451 if (p_defs->child_dev_size != sizeof(*p_child)) {
452 /* different child dev size . Ignore it */
453 DRM_DEBUG_KMS("different child size is found. Invalid.\n");
454 return;
455 }
456 /* get the block size of general definitions */
457 block_size = get_blocksize(p_defs);
458 /* get the number of child device */
459 child_device_num = (block_size - sizeof(*p_defs)) /
460 sizeof(*p_child);
461 count = 0;
462 for (i = 0; i < child_device_num; i++) {
463 p_child = &(p_defs->devices[i]);
464 if (!p_child->old.device_type) {
465 /* skip the device block if device type is invalid */
466 continue;
467 }
468 if (p_child->old.slave_addr != SLAVE_ADDR1 &&
469 p_child->old.slave_addr != SLAVE_ADDR2) {
470 /*
471 * If the slave address is neither 0x70 nor 0x72,
472 * it is not a SDVO device. Skip it.
473 */
474 continue;
475 }
476 if (p_child->old.dvo_port != DEVICE_PORT_DVOB &&
477 p_child->old.dvo_port != DEVICE_PORT_DVOC) {
478 /* skip the incorrect SDVO port */
479 DRM_DEBUG_KMS("Incorrect SDVO port. Skip it\n");
480 continue;
481 }
482 DRM_DEBUG_KMS("the SDVO device with slave addr %2x is found on"
483 " %s port\n",
484 p_child->old.slave_addr,
485 (p_child->old.dvo_port == DEVICE_PORT_DVOB) ?
486 "SDVOB" : "SDVOC");
487 p_mapping = &(dev_priv->sdvo_mappings[p_child->old.dvo_port - 1]);
488 if (!p_mapping->initialized) {
489 p_mapping->dvo_port = p_child->old.dvo_port;
490 p_mapping->slave_addr = p_child->old.slave_addr;
491 p_mapping->dvo_wiring = p_child->old.dvo_wiring;
492 p_mapping->ddc_pin = p_child->old.ddc_pin;
493 p_mapping->i2c_pin = p_child->old.i2c_pin;
494 p_mapping->initialized = 1;
495 DRM_DEBUG_KMS("SDVO device: dvo=%x, addr=%x, wiring=%d, ddc_pin=%d, i2c_pin=%d\n",
496 p_mapping->dvo_port,
497 p_mapping->slave_addr,
498 p_mapping->dvo_wiring,
499 p_mapping->ddc_pin,
500 p_mapping->i2c_pin);
501 } else {
502 DRM_DEBUG_KMS("Maybe one SDVO port is shared by "
503 "two SDVO device.\n");
504 }
505 if (p_child->old.slave2_addr) {
506 /* Maybe this is a SDVO device with multiple inputs */
507 /* And the mapping info is not added */
508 DRM_DEBUG_KMS("there exists the slave2_addr. Maybe this"
509 " is a SDVO device with multiple inputs.\n");
510 }
511 count++;
512 }
513
514 if (!count) {
515 /* No SDVO device info is found */
516 DRM_DEBUG_KMS("No SDVO device info is found in VBT\n");
517 }
518 return;
519}
520
521static void
522parse_driver_features(struct drm_i915_private *dev_priv,
523 struct bdb_header *bdb)
524{
525 struct bdb_driver_features *driver;
526
527 driver = find_section(bdb, BDB_DRIVER_FEATURES);
528 if (!driver)
529 return;
530
531 if (driver->lvds_config == BDB_DRIVER_FEATURE_EDP)
532 dev_priv->vbt.edp_support = 1;
533
534 if (driver->dual_frequency)
535 dev_priv->render_reclock_avail = true;
536}
537
538static void
539parse_edp(struct drm_i915_private *dev_priv, struct bdb_header *bdb)
540{
541 struct bdb_edp *edp;
542 struct edp_power_seq *edp_pps;
543 struct edp_link_params *edp_link_params;
544
545 edp = find_section(bdb, BDB_EDP);
546 if (!edp) {
547 if (dev_priv->vbt.edp_support)
548 DRM_DEBUG_KMS("No eDP BDB found but eDP panel supported.\n");
549 return;
550 }
551
552 switch ((edp->color_depth >> (panel_type * 2)) & 3) {
553 case EDP_18BPP:
554 dev_priv->vbt.edp_bpp = 18;
555 break;
556 case EDP_24BPP:
557 dev_priv->vbt.edp_bpp = 24;
558 break;
559 case EDP_30BPP:
560 dev_priv->vbt.edp_bpp = 30;
561 break;
562 }
563
564 /* Get the eDP sequencing and link info */
565 edp_pps = &edp->power_seqs[panel_type];
566 edp_link_params = &edp->link_params[panel_type];
567
568 dev_priv->vbt.edp_pps = *edp_pps;
569
570 switch (edp_link_params->rate) {
571 case EDP_RATE_1_62:
572 dev_priv->vbt.edp_rate = DP_LINK_BW_1_62;
573 break;
574 case EDP_RATE_2_7:
575 dev_priv->vbt.edp_rate = DP_LINK_BW_2_7;
576 break;
577 default:
578 DRM_DEBUG_KMS("VBT has unknown eDP link rate value %u\n",
579 edp_link_params->rate);
580 break;
581 }
582
583 switch (edp_link_params->lanes) {
584 case EDP_LANE_1:
585 dev_priv->vbt.edp_lanes = 1;
586 break;
587 case EDP_LANE_2:
588 dev_priv->vbt.edp_lanes = 2;
589 break;
590 case EDP_LANE_4:
591 dev_priv->vbt.edp_lanes = 4;
592 break;
593 default:
594 DRM_DEBUG_KMS("VBT has unknown eDP lane count value %u\n",
595 edp_link_params->lanes);
596 break;
597 }
598
599 switch (edp_link_params->preemphasis) {
600 case EDP_PREEMPHASIS_NONE:
601 dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPHASIS_0;
602 break;
603 case EDP_PREEMPHASIS_3_5dB:
604 dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPHASIS_3_5;
605 break;
606 case EDP_PREEMPHASIS_6dB:
607 dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPHASIS_6;
608 break;
609 case EDP_PREEMPHASIS_9_5dB:
610 dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPHASIS_9_5;
611 break;
612 default:
613 DRM_DEBUG_KMS("VBT has unknown eDP pre-emphasis value %u\n",
614 edp_link_params->preemphasis);
615 break;
616 }
617
618 switch (edp_link_params->vswing) {
619 case EDP_VSWING_0_4V:
620 dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_400;
621 break;
622 case EDP_VSWING_0_6V:
623 dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_600;
624 break;
625 case EDP_VSWING_0_8V:
626 dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_800;
627 break;
628 case EDP_VSWING_1_2V:
629 dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_1200;
630 break;
631 default:
632 DRM_DEBUG_KMS("VBT has unknown eDP voltage swing value %u\n",
633 edp_link_params->vswing);
634 break;
635 }
636}
637
638static void
639parse_mipi(struct drm_i915_private *dev_priv, struct bdb_header *bdb)
640{
641 struct bdb_mipi *mipi;
642
643 mipi = find_section(bdb, BDB_MIPI_CONFIG);
644 if (!mipi) {
645 DRM_DEBUG_KMS("No MIPI BDB found");
646 return;
647 }
648
649 /* XXX: add more info */
650 dev_priv->vbt.dsi.panel_id = MIPI_DSI_GENERIC_PANEL_ID;
651}
652
653static void parse_ddi_port(struct drm_i915_private *dev_priv, enum port port,
654 struct bdb_header *bdb)
655{
656 union child_device_config *it, *child = NULL;
657 struct ddi_vbt_port_info *info = &dev_priv->vbt.ddi_port_info[port];
658 uint8_t hdmi_level_shift;
659 int i, j;
660 bool is_dvi, is_hdmi, is_dp, is_edp, is_crt;
661 uint8_t aux_channel;
662 /* Each DDI port can have more than one value on the "DVO Port" field,
663 * so look for all the possible values for each port and abort if more
664 * than one is found. */
665 int dvo_ports[][2] = {
666 {DVO_PORT_HDMIA, DVO_PORT_DPA},
667 {DVO_PORT_HDMIB, DVO_PORT_DPB},
668 {DVO_PORT_HDMIC, DVO_PORT_DPC},
669 {DVO_PORT_HDMID, DVO_PORT_DPD},
670 {DVO_PORT_CRT, -1 /* Port E can only be DVO_PORT_CRT */ },
671 };
672
673 /* Find the child device to use, abort if more than one found. */
674 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
675 it = dev_priv->vbt.child_dev + i;
676
677 for (j = 0; j < 2; j++) {
678 if (dvo_ports[port][j] == -1)
679 break;
680
681 if (it->common.dvo_port == dvo_ports[port][j]) {
682 if (child) {
683 DRM_DEBUG_KMS("More than one child device for port %c in VBT.\n",
684 port_name(port));
685 return;
686 }
687 child = it;
688 }
689 }
690 }
691 if (!child)
692 return;
693
694 aux_channel = child->raw[25];
695
696 is_dvi = child->common.device_type & DEVICE_TYPE_TMDS_DVI_SIGNALING;
697 is_dp = child->common.device_type & DEVICE_TYPE_DISPLAYPORT_OUTPUT;
698 is_crt = child->common.device_type & DEVICE_TYPE_ANALOG_OUTPUT;
699 is_hdmi = is_dvi && (child->common.device_type & DEVICE_TYPE_NOT_HDMI_OUTPUT) == 0;
700 is_edp = is_dp && (child->common.device_type & DEVICE_TYPE_INTERNAL_CONNECTOR);
701
702 info->supports_dvi = is_dvi;
703 info->supports_hdmi = is_hdmi;
704 info->supports_dp = is_dp;
705
706 DRM_DEBUG_KMS("Port %c VBT info: DP:%d HDMI:%d DVI:%d EDP:%d CRT:%d\n",
707 port_name(port), is_dp, is_hdmi, is_dvi, is_edp, is_crt);
708
709 if (is_edp && is_dvi)
710 DRM_DEBUG_KMS("Internal DP port %c is TMDS compatible\n",
711 port_name(port));
712 if (is_crt && port != PORT_E)
713 DRM_DEBUG_KMS("Port %c is analog\n", port_name(port));
714 if (is_crt && (is_dvi || is_dp))
715 DRM_DEBUG_KMS("Analog port %c is also DP or TMDS compatible\n",
716 port_name(port));
717 if (is_dvi && (port == PORT_A || port == PORT_E))
718 DRM_DEBUG_KMS("Port %c is TMDS compabile\n", port_name(port));
719 if (!is_dvi && !is_dp && !is_crt)
720 DRM_DEBUG_KMS("Port %c is not DP/TMDS/CRT compatible\n",
721 port_name(port));
722 if (is_edp && (port == PORT_B || port == PORT_C || port == PORT_E))
723 DRM_DEBUG_KMS("Port %c is internal DP\n", port_name(port));
724
725 if (is_dvi) {
726 if (child->common.ddc_pin == 0x05 && port != PORT_B)
727 DRM_DEBUG_KMS("Unexpected DDC pin for port B\n");
728 if (child->common.ddc_pin == 0x04 && port != PORT_C)
729 DRM_DEBUG_KMS("Unexpected DDC pin for port C\n");
730 if (child->common.ddc_pin == 0x06 && port != PORT_D)
731 DRM_DEBUG_KMS("Unexpected DDC pin for port D\n");
732 }
733
734 if (is_dp) {
735 if (aux_channel == 0x40 && port != PORT_A)
736 DRM_DEBUG_KMS("Unexpected AUX channel for port A\n");
737 if (aux_channel == 0x10 && port != PORT_B)
738 DRM_DEBUG_KMS("Unexpected AUX channel for port B\n");
739 if (aux_channel == 0x20 && port != PORT_C)
740 DRM_DEBUG_KMS("Unexpected AUX channel for port C\n");
741 if (aux_channel == 0x30 && port != PORT_D)
742 DRM_DEBUG_KMS("Unexpected AUX channel for port D\n");
743 }
744
745 if (bdb->version >= 158) {
746 /* The VBT HDMI level shift values match the table we have. */
747 hdmi_level_shift = child->raw[7] & 0xF;
748 if (hdmi_level_shift < 0xC) {
749 DRM_DEBUG_KMS("VBT HDMI level shift for port %c: %d\n",
750 port_name(port),
751 hdmi_level_shift);
752 info->hdmi_level_shift = hdmi_level_shift;
753 }
754 }
755}
756
757static void parse_ddi_ports(struct drm_i915_private *dev_priv,
758 struct bdb_header *bdb)
759{
760 struct drm_device *dev = dev_priv->dev;
761 enum port port;
762
763 if (!HAS_DDI(dev))
764 return;
765
766 if (!dev_priv->vbt.child_dev_num)
767 return;
768
769 if (bdb->version < 155)
770 return;
771
772 for (port = PORT_A; port < I915_MAX_PORTS; port++)
773 parse_ddi_port(dev_priv, port, bdb);
774}
775
776static void
777parse_device_mapping(struct drm_i915_private *dev_priv,
778 struct bdb_header *bdb)
779{
780 struct bdb_general_definitions *p_defs;
781 union child_device_config *p_child, *child_dev_ptr;
782 int i, child_device_num, count;
783 u16 block_size;
784
785 p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
786 if (!p_defs) {
787 DRM_DEBUG_KMS("No general definition block is found, no devices defined.\n");
788 return;
789 }
790 /* judge whether the size of child device meets the requirements.
791 * If the child device size obtained from general definition block
792 * is different with sizeof(struct child_device_config), skip the
793 * parsing of sdvo device info
794 */
795 if (p_defs->child_dev_size != sizeof(*p_child)) {
796 /* different child dev size . Ignore it */
797 DRM_DEBUG_KMS("different child size is found. Invalid.\n");
798 return;
799 }
800 /* get the block size of general definitions */
801 block_size = get_blocksize(p_defs);
802 /* get the number of child device */
803 child_device_num = (block_size - sizeof(*p_defs)) /
804 sizeof(*p_child);
805 count = 0;
806 /* get the number of child device that is present */
807 for (i = 0; i < child_device_num; i++) {
808 p_child = &(p_defs->devices[i]);
809 if (!p_child->common.device_type) {
810 /* skip the device block if device type is invalid */
811 continue;
812 }
813 count++;
814 }
815 if (!count) {
816 DRM_DEBUG_KMS("no child dev is parsed from VBT\n");
817 return;
818 }
819 dev_priv->vbt.child_dev = kcalloc(count, sizeof(*p_child), GFP_KERNEL);
820 if (!dev_priv->vbt.child_dev) {
821 DRM_DEBUG_KMS("No memory space for child device\n");
822 return;
823 }
824
825 dev_priv->vbt.child_dev_num = count;
826 count = 0;
827 for (i = 0; i < child_device_num; i++) {
828 p_child = &(p_defs->devices[i]);
829 if (!p_child->common.device_type) {
830 /* skip the device block if device type is invalid */
831 continue;
832 }
833 child_dev_ptr = dev_priv->vbt.child_dev + count;
834 count++;
835 memcpy((void *)child_dev_ptr, (void *)p_child,
836 sizeof(*p_child));
837 }
838 return;
839}
840
841static void
842init_vbt_defaults(struct drm_i915_private *dev_priv)
843{
844 struct drm_device *dev = dev_priv->dev;
845 enum port port;
846
847 dev_priv->vbt.crt_ddc_pin = GMBUS_PORT_VGADDC;
848
849 /* LFP panel data */
850 dev_priv->vbt.lvds_dither = 1;
851 dev_priv->vbt.lvds_vbt = 0;
852
853 /* SDVO panel data */
854 dev_priv->vbt.sdvo_lvds_vbt_mode = NULL;
855
856 /* general features */
857 dev_priv->vbt.int_tv_support = 1;
858 dev_priv->vbt.int_crt_support = 1;
859
860 /* Default to using SSC */
861 dev_priv->vbt.lvds_use_ssc = 1;
862 /*
863 * Core/SandyBridge/IvyBridge use alternative (120MHz) reference
864 * clock for LVDS.
865 */
866 dev_priv->vbt.lvds_ssc_freq = intel_bios_ssc_frequency(dev,
867 !HAS_PCH_SPLIT(dev));
868 DRM_DEBUG_KMS("Set default to SSC at %d kHz\n", dev_priv->vbt.lvds_ssc_freq);
869
870 for (port = PORT_A; port < I915_MAX_PORTS; port++) {
871 struct ddi_vbt_port_info *info =
872 &dev_priv->vbt.ddi_port_info[port];
873
874 /* Recommended BSpec default: 800mV 0dB. */
875 info->hdmi_level_shift = 6;
876
877 info->supports_dvi = (port != PORT_A && port != PORT_E);
878 info->supports_hdmi = info->supports_dvi;
879 info->supports_dp = (port != PORT_E);
880 }
881}
882
883static int __init intel_no_opregion_vbt_callback(const struct dmi_system_id *id)
884{
885 DRM_DEBUG_KMS("Falling back to manually reading VBT from "
886 "VBIOS ROM for %s\n",
887 id->ident);
888 return 1;
889}
890
891static const struct dmi_system_id intel_no_opregion_vbt[] = {
892 {
893 .callback = intel_no_opregion_vbt_callback,
894 .ident = "ThinkCentre A57",
895 .matches = {
896 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
897 DMI_MATCH(DMI_PRODUCT_NAME, "97027RG"),
898 },
899 },
900 { .callback = NULL, }
901};
902
903/**
904 * intel_parse_bios - find VBT and initialize settings from the BIOS
905 * @dev: DRM device
906 *
907 * Loads the Video BIOS and checks that the VBT exists. Sets scratch registers
908 * to appropriate values.
909 *
910 * Returns 0 on success, nonzero on failure.
911 */
912#ifdef __NetBSD__
913# define __iomem __pci_rom_iomem
914#endif
915int
916intel_parse_bios(struct drm_device *dev)
917{
918 struct drm_i915_private *dev_priv = dev->dev_private;
919 struct pci_dev *pdev = dev->pdev;
920 struct bdb_header *bdb = NULL;
921 u8 __iomem *bios = NULL;
922
923 if (HAS_PCH_NOP(dev))
924 return -ENODEV;
925
926 init_vbt_defaults(dev_priv);
927
928 /* XXX Should this validation be moved to intel_opregion.c? */
929 if (!dmi_check_system(intel_no_opregion_vbt) && dev_priv->opregion.vbt) {
930 struct vbt_header *vbt = dev_priv->opregion.vbt;
931 if (memcmp(vbt->signature, "$VBT", 4) == 0) {
932 DRM_DEBUG_KMS("Using VBT from OpRegion: %20s\n",
933 vbt->signature);
934 bdb = (struct bdb_header *)((char *)vbt + vbt->bdb_offset);
935 } else
936 dev_priv->opregion.vbt = NULL;
937 }
938
939 if (bdb == NULL) {
940 struct vbt_header *vbt = NULL;
941 size_t size;
942 int i;
943
944 bios = pci_map_rom(pdev, &size);
945 if (!bios)
946 return -1;
947
948 /* Scour memory looking for the VBT signature */
949 for (i = 0; i + 4 < size; i++) {
950 if (!memcmp(bios + i, "$VBT", 4)) {
951 vbt = (struct vbt_header *)(bios + i);
952 break;
953 }
954 }
955
956 if (!vbt) {
957 DRM_DEBUG_DRIVER("VBT signature missing\n");
958 pci_unmap_rom(pdev, bios);
959 return -1;
960 }
961
962 bdb = (struct bdb_header *)(bios + i + vbt->bdb_offset);
963 }
964
965 /* Grab useful general definitions */
966 parse_general_features(dev_priv, bdb);
967 parse_general_definitions(dev_priv, bdb);
968 parse_lfp_panel_data(dev_priv, bdb);
969 parse_lfp_backlight(dev_priv, bdb);
970 parse_sdvo_panel_data(dev_priv, bdb);
971 parse_sdvo_device_mapping(dev_priv, bdb);
972 parse_device_mapping(dev_priv, bdb);
973 parse_driver_features(dev_priv, bdb);
974 parse_edp(dev_priv, bdb);
975 parse_mipi(dev_priv, bdb);
976 parse_ddi_ports(dev_priv, bdb);
977
978 if (bios)
979 pci_unmap_rom(pdev, bios);
980
981 return 0;
982}
983#ifdef __NetBSD__
984# undef __iomem
985#endif
986
987/* Ensure that vital registers have been initialised, even if the BIOS
988 * is absent or just failing to do its job.
989 */
990void intel_setup_bios(struct drm_device *dev)
991{
992 struct drm_i915_private *dev_priv = dev->dev_private;
993
994 /* Set the Panel Power On/Off timings if uninitialized. */
995 if (!HAS_PCH_SPLIT(dev) &&
996 I915_READ(PP_ON_DELAYS) == 0 && I915_READ(PP_OFF_DELAYS) == 0) {
997 /* Set T2 to 40ms and T5 to 200ms */
998 I915_WRITE(PP_ON_DELAYS, 0x019007d0);
999
1000 /* Set T3 to 35ms and Tx to 200ms */
1001 I915_WRITE(PP_OFF_DELAYS, 0x015e07d0);
1002 }
1003}
1004