blob: 15fbc1b5a83ebe0d3df0afd331b558531a0ac188 [file] [log] [blame]
Jesse Barnes79e53942008-11-07 14:24:08 -08001/*
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 "drmP.h"
28#include "drm.h"
29#include "i915_drm.h"
30#include "i915_drv.h"
31#include "intel_bios.h"
32
yakui_zhao9b9d1722009-05-31 17:17:17 +080033#define SLAVE_ADDR1 0x70
34#define SLAVE_ADDR2 0x72
Jesse Barnes79e53942008-11-07 14:24:08 -080035
Zhenyu Wang500a8cc2010-01-13 11:19:52 +080036static int panel_type;
37
Jesse Barnes79e53942008-11-07 14:24:08 -080038static void *
39find_section(struct bdb_header *bdb, int section_id)
40{
41 u8 *base = (u8 *)bdb;
42 int index = 0;
43 u16 total, current_size;
44 u8 current_id;
45
46 /* skip to first section */
47 index += bdb->header_size;
48 total = bdb->bdb_size;
49
50 /* walk the sections looking for section_id */
51 while (index < total) {
52 current_id = *(base + index);
53 index++;
54 current_size = *((u16 *)(base + index));
55 index += 2;
56 if (current_id == section_id)
57 return base + index;
58 index += current_size;
59 }
60
61 return NULL;
62}
63
David Müller (ELSOFT AG)db545012009-08-29 08:54:45 +020064static u16
65get_blocksize(void *p)
66{
67 u16 *block_ptr, block_size;
68
69 block_ptr = (u16 *)((char *)p - 2);
70 block_size = *block_ptr;
71 return block_size;
72}
73
Jesse Barnes79e53942008-11-07 14:24:08 -080074static void
Ma Ling88631702009-05-13 11:19:55 +080075fill_detail_timing_data(struct drm_display_mode *panel_fixed_mode,
76 struct lvds_dvo_timing *dvo_timing)
77{
78 panel_fixed_mode->hdisplay = (dvo_timing->hactive_hi << 8) |
79 dvo_timing->hactive_lo;
80 panel_fixed_mode->hsync_start = panel_fixed_mode->hdisplay +
81 ((dvo_timing->hsync_off_hi << 8) | dvo_timing->hsync_off_lo);
82 panel_fixed_mode->hsync_end = panel_fixed_mode->hsync_start +
83 dvo_timing->hsync_pulse_width;
84 panel_fixed_mode->htotal = panel_fixed_mode->hdisplay +
85 ((dvo_timing->hblank_hi << 8) | dvo_timing->hblank_lo);
86
87 panel_fixed_mode->vdisplay = (dvo_timing->vactive_hi << 8) |
88 dvo_timing->vactive_lo;
89 panel_fixed_mode->vsync_start = panel_fixed_mode->vdisplay +
90 dvo_timing->vsync_off;
91 panel_fixed_mode->vsync_end = panel_fixed_mode->vsync_start +
92 dvo_timing->vsync_pulse_width;
93 panel_fixed_mode->vtotal = panel_fixed_mode->vdisplay +
94 ((dvo_timing->vblank_hi << 8) | dvo_timing->vblank_lo);
95 panel_fixed_mode->clock = dvo_timing->clock * 10;
96 panel_fixed_mode->type = DRM_MODE_TYPE_PREFERRED;
97
98 /* Some VBTs have bogus h/vtotal values */
99 if (panel_fixed_mode->hsync_end > panel_fixed_mode->htotal)
100 panel_fixed_mode->htotal = panel_fixed_mode->hsync_end + 1;
101 if (panel_fixed_mode->vsync_end > panel_fixed_mode->vtotal)
102 panel_fixed_mode->vtotal = panel_fixed_mode->vsync_end + 1;
103
104 drm_mode_set_name(panel_fixed_mode);
105}
106
107/* Try to find integrated panel data */
108static void
109parse_lfp_panel_data(struct drm_i915_private *dev_priv,
110 struct bdb_header *bdb)
Jesse Barnes79e53942008-11-07 14:24:08 -0800111{
112 struct bdb_lvds_options *lvds_options;
113 struct bdb_lvds_lfp_data *lvds_lfp_data;
Jesse Barnes1b16de02009-06-22 11:30:30 -0700114 struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs;
Jesse Barnes79e53942008-11-07 14:24:08 -0800115 struct bdb_lvds_lfp_data_entry *entry;
116 struct lvds_dvo_timing *dvo_timing;
117 struct drm_display_mode *panel_fixed_mode;
Zhao Yakuicdaa0522009-07-28 10:54:13 +0800118 int lfp_data_size, dvo_timing_offset;
Zhao Yakuid1fcea6a2009-11-20 11:24:17 +0800119 int i, temp_downclock;
120 struct drm_display_mode *temp_mode;
Jesse Barnes79e53942008-11-07 14:24:08 -0800121
122 /* Defaults if we can't find VBT info */
123 dev_priv->lvds_dither = 0;
124 dev_priv->lvds_vbt = 0;
125
126 lvds_options = find_section(bdb, BDB_LVDS_OPTIONS);
127 if (!lvds_options)
128 return;
129
130 dev_priv->lvds_dither = lvds_options->pixel_dither;
131 if (lvds_options->panel_type == 0xff)
132 return;
Zhenyu Wang500a8cc2010-01-13 11:19:52 +0800133 panel_type = lvds_options->panel_type;
Jesse Barnes79e53942008-11-07 14:24:08 -0800134
135 lvds_lfp_data = find_section(bdb, BDB_LVDS_LFP_DATA);
136 if (!lvds_lfp_data)
137 return;
138
Jesse Barnes1b16de02009-06-22 11:30:30 -0700139 lvds_lfp_data_ptrs = find_section(bdb, BDB_LVDS_LFP_DATA_PTRS);
140 if (!lvds_lfp_data_ptrs)
141 return;
142
Jesse Barnes79e53942008-11-07 14:24:08 -0800143 dev_priv->lvds_vbt = 1;
144
Jesse Barnes1b16de02009-06-22 11:30:30 -0700145 lfp_data_size = lvds_lfp_data_ptrs->ptr[1].dvo_timing_offset -
146 lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset;
147 entry = (struct bdb_lvds_lfp_data_entry *)
148 ((uint8_t *)lvds_lfp_data->data + (lfp_data_size *
149 lvds_options->panel_type));
Zhao Yakuicdaa0522009-07-28 10:54:13 +0800150 dvo_timing_offset = lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset -
151 lvds_lfp_data_ptrs->ptr[0].fp_timing_offset;
Zhenyu Wang50199142009-07-10 14:39:59 +0800152
Zhao Yakuicdaa0522009-07-28 10:54:13 +0800153 /*
154 * the size of fp_timing varies on the different platform.
155 * So calculate the DVO timing relative offset in LVDS data
156 * entry to get the DVO timing entry
157 */
158 dvo_timing = (struct lvds_dvo_timing *)
159 ((unsigned char *)entry + dvo_timing_offset);
Jesse Barnes79e53942008-11-07 14:24:08 -0800160
Eric Anholt9a298b22009-03-24 12:23:04 -0700161 panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
Jesse Barnes79e53942008-11-07 14:24:08 -0800162
Ma Ling88631702009-05-13 11:19:55 +0800163 fill_detail_timing_data(panel_fixed_mode, dvo_timing);
Jesse Barnes79e53942008-11-07 14:24:08 -0800164
Ma Ling88631702009-05-13 11:19:55 +0800165 dev_priv->lfp_lvds_vbt_mode = panel_fixed_mode;
Jesse Barnes79e53942008-11-07 14:24:08 -0800166
Zhao Yakui28c97732009-10-09 11:39:41 +0800167 DRM_DEBUG_KMS("Found panel mode in BIOS VBT tables:\n");
Jesse Barnes79e53942008-11-07 14:24:08 -0800168 drm_mode_debug_printmodeline(panel_fixed_mode);
169
Zhao Yakuid1fcea6a2009-11-20 11:24:17 +0800170 temp_mode = kzalloc(sizeof(*temp_mode), GFP_KERNEL);
171 temp_downclock = panel_fixed_mode->clock;
172 /*
173 * enumerate the LVDS panel timing info entry in VBT to check whether
174 * the LVDS downclock is found.
175 */
176 for (i = 0; i < 16; i++) {
177 entry = (struct bdb_lvds_lfp_data_entry *)
178 ((uint8_t *)lvds_lfp_data->data + (lfp_data_size * i));
179 dvo_timing = (struct lvds_dvo_timing *)
180 ((unsigned char *)entry + dvo_timing_offset);
181
182 fill_detail_timing_data(temp_mode, dvo_timing);
183
184 if (temp_mode->hdisplay == panel_fixed_mode->hdisplay &&
185 temp_mode->hsync_start == panel_fixed_mode->hsync_start &&
186 temp_mode->hsync_end == panel_fixed_mode->hsync_end &&
187 temp_mode->htotal == panel_fixed_mode->htotal &&
188 temp_mode->vdisplay == panel_fixed_mode->vdisplay &&
189 temp_mode->vsync_start == panel_fixed_mode->vsync_start &&
190 temp_mode->vsync_end == panel_fixed_mode->vsync_end &&
191 temp_mode->vtotal == panel_fixed_mode->vtotal &&
192 temp_mode->clock < temp_downclock) {
193 /*
194 * downclock is already found. But we expect
195 * to find the lower downclock.
196 */
197 temp_downclock = temp_mode->clock;
198 }
199 /* clear it to zero */
200 memset(temp_mode, 0, sizeof(*temp_mode));
201 }
202 kfree(temp_mode);
Jesse Barnes33814342010-01-14 20:48:02 +0000203 if (temp_downclock < panel_fixed_mode->clock &&
204 i915_lvds_downclock) {
Zhao Yakuid1fcea6a2009-11-20 11:24:17 +0800205 dev_priv->lvds_downclock_avail = 1;
206 dev_priv->lvds_downclock = temp_downclock;
207 DRM_DEBUG_KMS("LVDS downclock is found in VBT. ",
208 "Normal Clock %dKHz, downclock %dKHz\n",
209 temp_downclock, panel_fixed_mode->clock);
210 }
Jesse Barnes79e53942008-11-07 14:24:08 -0800211 return;
212}
213
Ma Ling88631702009-05-13 11:19:55 +0800214/* Try to find sdvo panel data */
215static void
216parse_sdvo_panel_data(struct drm_i915_private *dev_priv,
217 struct bdb_header *bdb)
218{
219 struct bdb_sdvo_lvds_options *sdvo_lvds_options;
220 struct lvds_dvo_timing *dvo_timing;
221 struct drm_display_mode *panel_fixed_mode;
222
223 dev_priv->sdvo_lvds_vbt_mode = NULL;
224
225 sdvo_lvds_options = find_section(bdb, BDB_SDVO_LVDS_OPTIONS);
226 if (!sdvo_lvds_options)
227 return;
228
229 dvo_timing = find_section(bdb, BDB_SDVO_PANEL_DTDS);
230 if (!dvo_timing)
231 return;
232
Eric Anholt9a298b22009-03-24 12:23:04 -0700233 panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
Ma Ling88631702009-05-13 11:19:55 +0800234
235 if (!panel_fixed_mode)
236 return;
237
238 fill_detail_timing_data(panel_fixed_mode,
239 dvo_timing + sdvo_lvds_options->panel_type);
240
241 dev_priv->sdvo_lvds_vbt_mode = panel_fixed_mode;
242
243 return;
244}
245
Jesse Barnes79e53942008-11-07 14:24:08 -0800246static void
247parse_general_features(struct drm_i915_private *dev_priv,
248 struct bdb_header *bdb)
249{
250 struct bdb_general_features *general;
251
252 /* Set sensible defaults in case we can't find the general block */
253 dev_priv->int_tv_support = 1;
254 dev_priv->int_crt_support = 1;
255
256 general = find_section(bdb, BDB_GENERAL_FEATURES);
257 if (general) {
258 dev_priv->int_tv_support = general->int_tv_support;
259 dev_priv->int_crt_support = general->int_crt_support;
Kristian Høgsberg43565a02009-02-13 20:56:52 -0500260 dev_priv->lvds_use_ssc = general->enable_ssc;
261
262 if (dev_priv->lvds_use_ssc) {
ling.ma@intel.com6ff4fd02009-06-25 10:59:22 +0800263 if (IS_I85X(dev_priv->dev))
264 dev_priv->lvds_ssc_freq =
265 general->ssc_freq ? 66 : 48;
Adam Jacksonf2b115e2009-12-03 17:14:42 -0500266 else if (IS_IRONLAKE(dev_priv->dev))
Zhenyu Wang339e5a42009-09-19 14:54:07 +0800267 dev_priv->lvds_ssc_freq =
268 general->ssc_freq ? 100 : 120;
ling.ma@intel.com6ff4fd02009-06-25 10:59:22 +0800269 else
270 dev_priv->lvds_ssc_freq =
271 general->ssc_freq ? 100 : 96;
Kristian Høgsberg43565a02009-02-13 20:56:52 -0500272 }
Jesse Barnes79e53942008-11-07 14:24:08 -0800273 }
274}
275
yakui_zhao9b9d1722009-05-31 17:17:17 +0800276static void
David Müller (ELSOFT AG)db545012009-08-29 08:54:45 +0200277parse_general_definitions(struct drm_i915_private *dev_priv,
278 struct bdb_header *bdb)
279{
280 struct bdb_general_definitions *general;
281 const int crt_bus_map_table[] = {
282 GPIOB,
283 GPIOA,
284 GPIOC,
285 GPIOD,
286 GPIOE,
287 GPIOF,
288 };
289
David Müller (ELSOFT AG)db545012009-08-29 08:54:45 +0200290 general = find_section(bdb, BDB_GENERAL_DEFINITIONS);
291 if (general) {
292 u16 block_size = get_blocksize(general);
293 if (block_size >= sizeof(*general)) {
294 int bus_pin = general->crt_ddc_gmbus_pin;
Zhao Yakui28c97732009-10-09 11:39:41 +0800295 DRM_DEBUG_KMS("crt_ddc_bus_pin: %d\n", bus_pin);
David Müller (ELSOFT AG)db545012009-08-29 08:54:45 +0200296 if ((bus_pin >= 1) && (bus_pin <= 6)) {
297 dev_priv->crt_ddc_bus =
298 crt_bus_map_table[bus_pin-1];
299 }
300 } else {
Zhao Yakui28c97732009-10-09 11:39:41 +0800301 DRM_DEBUG_KMS("BDB_GD too small (%d). Invalid.\n",
David Müller (ELSOFT AG)db545012009-08-29 08:54:45 +0200302 block_size);
303 }
304 }
305}
306
307static void
yakui_zhao9b9d1722009-05-31 17:17:17 +0800308parse_sdvo_device_mapping(struct drm_i915_private *dev_priv,
309 struct bdb_header *bdb)
310{
311 struct sdvo_device_mapping *p_mapping;
312 struct bdb_general_definitions *p_defs;
313 struct child_device_config *p_child;
314 int i, child_device_num, count;
David Müller (ELSOFT AG)db545012009-08-29 08:54:45 +0200315 u16 block_size;
yakui_zhao9b9d1722009-05-31 17:17:17 +0800316
317 p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
318 if (!p_defs) {
Zhao Yakui28c97732009-10-09 11:39:41 +0800319 DRM_DEBUG_KMS("No general definition block is found\n");
yakui_zhao9b9d1722009-05-31 17:17:17 +0800320 return;
321 }
322 /* judge whether the size of child device meets the requirements.
323 * If the child device size obtained from general definition block
324 * is different with sizeof(struct child_device_config), skip the
325 * parsing of sdvo device info
326 */
327 if (p_defs->child_dev_size != sizeof(*p_child)) {
328 /* different child dev size . Ignore it */
Zhao Yakui28c97732009-10-09 11:39:41 +0800329 DRM_DEBUG_KMS("different child size is found. Invalid.\n");
yakui_zhao9b9d1722009-05-31 17:17:17 +0800330 return;
331 }
332 /* get the block size of general definitions */
David Müller (ELSOFT AG)db545012009-08-29 08:54:45 +0200333 block_size = get_blocksize(p_defs);
yakui_zhao9b9d1722009-05-31 17:17:17 +0800334 /* get the number of child device */
335 child_device_num = (block_size - sizeof(*p_defs)) /
336 sizeof(*p_child);
337 count = 0;
338 for (i = 0; i < child_device_num; i++) {
339 p_child = &(p_defs->devices[i]);
340 if (!p_child->device_type) {
341 /* skip the device block if device type is invalid */
342 continue;
343 }
344 if (p_child->slave_addr != SLAVE_ADDR1 &&
345 p_child->slave_addr != SLAVE_ADDR2) {
346 /*
347 * If the slave address is neither 0x70 nor 0x72,
348 * it is not a SDVO device. Skip it.
349 */
350 continue;
351 }
352 if (p_child->dvo_port != DEVICE_PORT_DVOB &&
353 p_child->dvo_port != DEVICE_PORT_DVOC) {
354 /* skip the incorrect SDVO port */
Zhao Yakui28c97732009-10-09 11:39:41 +0800355 DRM_DEBUG_KMS("Incorrect SDVO port. Skip it \n");
yakui_zhao9b9d1722009-05-31 17:17:17 +0800356 continue;
357 }
Zhao Yakui28c97732009-10-09 11:39:41 +0800358 DRM_DEBUG_KMS("the SDVO device with slave addr %2x is found on"
359 " %s port\n",
yakui_zhao9b9d1722009-05-31 17:17:17 +0800360 p_child->slave_addr,
361 (p_child->dvo_port == DEVICE_PORT_DVOB) ?
362 "SDVOB" : "SDVOC");
363 p_mapping = &(dev_priv->sdvo_mappings[p_child->dvo_port - 1]);
364 if (!p_mapping->initialized) {
365 p_mapping->dvo_port = p_child->dvo_port;
366 p_mapping->slave_addr = p_child->slave_addr;
367 p_mapping->dvo_wiring = p_child->dvo_wiring;
368 p_mapping->initialized = 1;
369 } else {
Zhao Yakui28c97732009-10-09 11:39:41 +0800370 DRM_DEBUG_KMS("Maybe one SDVO port is shared by "
yakui_zhao9b9d1722009-05-31 17:17:17 +0800371 "two SDVO device.\n");
372 }
373 if (p_child->slave2_addr) {
374 /* Maybe this is a SDVO device with multiple inputs */
375 /* And the mapping info is not added */
Zhao Yakui28c97732009-10-09 11:39:41 +0800376 DRM_DEBUG_KMS("there exists the slave2_addr. Maybe this"
377 " is a SDVO device with multiple inputs.\n");
yakui_zhao9b9d1722009-05-31 17:17:17 +0800378 }
379 count++;
380 }
381
382 if (!count) {
383 /* No SDVO device info is found */
Zhao Yakui28c97732009-10-09 11:39:41 +0800384 DRM_DEBUG_KMS("No SDVO device info is found in VBT\n");
yakui_zhao9b9d1722009-05-31 17:17:17 +0800385 }
386 return;
387}
Zhenyu Wang32f9d652009-07-24 01:00:32 +0800388
389static void
390parse_driver_features(struct drm_i915_private *dev_priv,
391 struct bdb_header *bdb)
392{
393 struct drm_device *dev = dev_priv->dev;
394 struct bdb_driver_features *driver;
395
Zhenyu Wang32f9d652009-07-24 01:00:32 +0800396 driver = find_section(bdb, BDB_DRIVER_FEATURES);
Jesse Barnes652c3932009-08-17 13:31:43 -0700397 if (!driver)
398 return;
399
Andy Lutomirski181a5332009-10-13 10:40:52 -0700400 if (driver && SUPPORTS_EDP(dev) &&
401 driver->lvds_config == BDB_DRIVER_FEATURE_EDP) {
Zhenyu Wang32f9d652009-07-24 01:00:32 +0800402 dev_priv->edp_support = 1;
Andy Lutomirski181a5332009-10-13 10:40:52 -0700403 } else {
404 dev_priv->edp_support = 0;
405 }
Jesse Barnes652c3932009-08-17 13:31:43 -0700406
Andy Lutomirski181a5332009-10-13 10:40:52 -0700407 if (driver && driver->dual_frequency)
Jesse Barnes652c3932009-08-17 13:31:43 -0700408 dev_priv->render_reclock_avail = true;
Zhenyu Wang32f9d652009-07-24 01:00:32 +0800409}
410
Zhao Yakui6363ee62009-11-24 09:48:44 +0800411static void
Zhenyu Wang500a8cc2010-01-13 11:19:52 +0800412parse_edp(struct drm_i915_private *dev_priv, struct bdb_header *bdb)
413{
414 struct bdb_edp *edp;
415
416 edp = find_section(bdb, BDB_EDP);
417 if (!edp) {
418 if (SUPPORTS_EDP(dev_priv->dev) && dev_priv->edp_support) {
419 DRM_DEBUG_KMS("No eDP BDB found but eDP panel supported,\
420 assume 18bpp panel color depth.\n");
421 dev_priv->edp_bpp = 18;
422 }
423 return;
424 }
425
426 switch ((edp->color_depth >> (panel_type * 2)) & 3) {
427 case EDP_18BPP:
428 dev_priv->edp_bpp = 18;
429 break;
430 case EDP_24BPP:
431 dev_priv->edp_bpp = 24;
432 break;
433 case EDP_30BPP:
434 dev_priv->edp_bpp = 30;
435 break;
436 }
437}
438
439static void
Zhao Yakui6363ee62009-11-24 09:48:44 +0800440parse_device_mapping(struct drm_i915_private *dev_priv,
441 struct bdb_header *bdb)
442{
443 struct bdb_general_definitions *p_defs;
444 struct child_device_config *p_child, *child_dev_ptr;
445 int i, child_device_num, count;
446 u16 block_size;
447
448 p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
449 if (!p_defs) {
450 DRM_DEBUG_KMS("No general definition block is found\n");
451 return;
452 }
453 /* judge whether the size of child device meets the requirements.
454 * If the child device size obtained from general definition block
455 * is different with sizeof(struct child_device_config), skip the
456 * parsing of sdvo device info
457 */
458 if (p_defs->child_dev_size != sizeof(*p_child)) {
459 /* different child dev size . Ignore it */
460 DRM_DEBUG_KMS("different child size is found. Invalid.\n");
461 return;
462 }
463 /* get the block size of general definitions */
464 block_size = get_blocksize(p_defs);
465 /* get the number of child device */
466 child_device_num = (block_size - sizeof(*p_defs)) /
467 sizeof(*p_child);
468 count = 0;
469 /* get the number of child device that is present */
470 for (i = 0; i < child_device_num; i++) {
471 p_child = &(p_defs->devices[i]);
472 if (!p_child->device_type) {
473 /* skip the device block if device type is invalid */
474 continue;
475 }
476 count++;
477 }
478 if (!count) {
479 DRM_DEBUG_KMS("no child dev is parsed from VBT \n");
480 return;
481 }
482 dev_priv->child_dev = kzalloc(sizeof(*p_child) * count, GFP_KERNEL);
483 if (!dev_priv->child_dev) {
484 DRM_DEBUG_KMS("No memory space for child device\n");
485 return;
486 }
487
488 dev_priv->child_dev_num = count;
489 count = 0;
490 for (i = 0; i < child_device_num; i++) {
491 p_child = &(p_defs->devices[i]);
492 if (!p_child->device_type) {
493 /* skip the device block if device type is invalid */
494 continue;
495 }
496 child_dev_ptr = dev_priv->child_dev + count;
497 count++;
498 memcpy((void *)child_dev_ptr, (void *)p_child,
499 sizeof(*p_child));
500 }
501 return;
502}
Jesse Barnes79e53942008-11-07 14:24:08 -0800503/**
504 * intel_init_bios - initialize VBIOS settings & find VBT
505 * @dev: DRM device
506 *
507 * Loads the Video BIOS and checks that the VBT exists. Sets scratch registers
508 * to appropriate values.
509 *
510 * VBT existence is a sanity check that is relied on by other i830_bios.c code.
511 * Note that it would be better to use a BIOS call to get the VBT, as BIOSes may
512 * feed an updated VBT back through that, compared to what we'll fetch using
513 * this method of groping around in the BIOS data.
514 *
515 * Returns 0 on success, nonzero on failure.
516 */
517bool
518intel_init_bios(struct drm_device *dev)
519{
520 struct drm_i915_private *dev_priv = dev->dev_private;
521 struct pci_dev *pdev = dev->pdev;
522 struct vbt_header *vbt = NULL;
523 struct bdb_header *bdb;
524 u8 __iomem *bios;
525 size_t size;
526 int i;
527
528 bios = pci_map_rom(pdev, &size);
529 if (!bios)
530 return -1;
531
532 /* Scour memory looking for the VBT signature */
533 for (i = 0; i + 4 < size; i++) {
534 if (!memcmp(bios + i, "$VBT", 4)) {
535 vbt = (struct vbt_header *)(bios + i);
536 break;
537 }
538 }
539
540 if (!vbt) {
541 DRM_ERROR("VBT signature missing\n");
542 pci_unmap_rom(pdev, bios);
543 return -1;
544 }
545
546 bdb = (struct bdb_header *)(bios + i + vbt->bdb_offset);
547
548 /* Grab useful general definitions */
549 parse_general_features(dev_priv, bdb);
David Müller (ELSOFT AG)db545012009-08-29 08:54:45 +0200550 parse_general_definitions(dev_priv, bdb);
Ma Ling88631702009-05-13 11:19:55 +0800551 parse_lfp_panel_data(dev_priv, bdb);
552 parse_sdvo_panel_data(dev_priv, bdb);
yakui_zhao9b9d1722009-05-31 17:17:17 +0800553 parse_sdvo_device_mapping(dev_priv, bdb);
Zhao Yakui6363ee62009-11-24 09:48:44 +0800554 parse_device_mapping(dev_priv, bdb);
Zhenyu Wang32f9d652009-07-24 01:00:32 +0800555 parse_driver_features(dev_priv, bdb);
Zhenyu Wang500a8cc2010-01-13 11:19:52 +0800556 parse_edp(dev_priv, bdb);
Zhenyu Wang32f9d652009-07-24 01:00:32 +0800557
Jesse Barnes79e53942008-11-07 14:24:08 -0800558 pci_unmap_rom(pdev, bios);
559
560 return 0;
561}