blob: 198fc3c3291b2ac05540ea36ef853c9826b23efa [file] [log] [blame]
Jesse Barnes79e53942008-11-07 14:24:08 -08001/*
Keith Packard39507252011-09-22 12:30:16 -07002 * Copyright © 2006 Intel Corporation
Jesse Barnes79e53942008-11-07 14:24:08 -08003 *
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 */
Daniel Vetter25e341c2012-03-24 23:51:30 +010027#include <linux/dmi.h>
Jesse Barnes9f0e7ff2010-10-07 16:01:14 -070028#include <drm/drm_dp_helper.h>
David Howells760285e2012-10-02 18:01:07 +010029#include <drm/drmP.h>
30#include <drm/i915_drm.h>
Jesse Barnes79e53942008-11-07 14:24:08 -080031#include "i915_drv.h"
32#include "intel_bios.h"
33
yakui_zhao9b9d1722009-05-31 17:17:17 +080034#define SLAVE_ADDR1 0x70
35#define SLAVE_ADDR2 0x72
Jesse Barnes79e53942008-11-07 14:24:08 -080036
Zhenyu Wang500a8cc2010-01-13 11:19:52 +080037static int panel_type;
38
Jani Nikulae8ef3b42015-04-15 15:18:28 +030039static const void *
40find_section(const void *_bdb, int section_id)
Jesse Barnes79e53942008-11-07 14:24:08 -080041{
Jani Nikulae8ef3b42015-04-15 15:18:28 +030042 const struct bdb_header *bdb = _bdb;
43 const u8 *base = _bdb;
Jesse Barnes79e53942008-11-07 14:24:08 -080044 int index = 0;
45 u16 total, current_size;
46 u8 current_id;
47
48 /* skip to first section */
49 index += bdb->header_size;
50 total = bdb->bdb_size;
51
52 /* walk the sections looking for section_id */
Chris Wilsond1f13fd2014-04-18 18:04:23 -030053 while (index + 3 < total) {
Jesse Barnes79e53942008-11-07 14:24:08 -080054 current_id = *(base + index);
55 index++;
Chris Wilsond1f13fd2014-04-18 18:04:23 -030056
Jani Nikulae8ef3b42015-04-15 15:18:28 +030057 current_size = *((const u16 *)(base + index));
Jesse Barnes79e53942008-11-07 14:24:08 -080058 index += 2;
Chris Wilsond1f13fd2014-04-18 18:04:23 -030059
60 if (index + current_size > total)
61 return NULL;
62
Jesse Barnes79e53942008-11-07 14:24:08 -080063 if (current_id == section_id)
64 return base + index;
Chris Wilsond1f13fd2014-04-18 18:04:23 -030065
Jesse Barnes79e53942008-11-07 14:24:08 -080066 index += current_size;
67 }
68
69 return NULL;
70}
71
David Müller (ELSOFT AG)db545012009-08-29 08:54:45 +020072static u16
Jani Nikulae8ef3b42015-04-15 15:18:28 +030073get_blocksize(const void *p)
David Müller (ELSOFT AG)db545012009-08-29 08:54:45 +020074{
75 u16 *block_ptr, block_size;
76
77 block_ptr = (u16 *)((char *)p - 2);
78 block_size = *block_ptr;
79 return block_size;
80}
81
Jesse Barnes79e53942008-11-07 14:24:08 -080082static void
Ma Ling88631702009-05-13 11:19:55 +080083fill_detail_timing_data(struct drm_display_mode *panel_fixed_mode,
Chris Wilson99834ea2011-07-13 21:01:46 +010084 const struct lvds_dvo_timing *dvo_timing)
Ma Ling88631702009-05-13 11:19:55 +080085{
86 panel_fixed_mode->hdisplay = (dvo_timing->hactive_hi << 8) |
87 dvo_timing->hactive_lo;
88 panel_fixed_mode->hsync_start = panel_fixed_mode->hdisplay +
89 ((dvo_timing->hsync_off_hi << 8) | dvo_timing->hsync_off_lo);
90 panel_fixed_mode->hsync_end = panel_fixed_mode->hsync_start +
91 dvo_timing->hsync_pulse_width;
92 panel_fixed_mode->htotal = panel_fixed_mode->hdisplay +
93 ((dvo_timing->hblank_hi << 8) | dvo_timing->hblank_lo);
94
95 panel_fixed_mode->vdisplay = (dvo_timing->vactive_hi << 8) |
96 dvo_timing->vactive_lo;
97 panel_fixed_mode->vsync_start = panel_fixed_mode->vdisplay +
98 dvo_timing->vsync_off;
99 panel_fixed_mode->vsync_end = panel_fixed_mode->vsync_start +
100 dvo_timing->vsync_pulse_width;
101 panel_fixed_mode->vtotal = panel_fixed_mode->vdisplay +
102 ((dvo_timing->vblank_hi << 8) | dvo_timing->vblank_lo);
103 panel_fixed_mode->clock = dvo_timing->clock * 10;
104 panel_fixed_mode->type = DRM_MODE_TYPE_PREFERRED;
105
Adam Jackson9bc35492010-05-28 17:17:37 -0400106 if (dvo_timing->hsync_positive)
107 panel_fixed_mode->flags |= DRM_MODE_FLAG_PHSYNC;
108 else
109 panel_fixed_mode->flags |= DRM_MODE_FLAG_NHSYNC;
110
111 if (dvo_timing->vsync_positive)
112 panel_fixed_mode->flags |= DRM_MODE_FLAG_PVSYNC;
113 else
114 panel_fixed_mode->flags |= DRM_MODE_FLAG_NVSYNC;
115
Ma Ling88631702009-05-13 11:19:55 +0800116 /* Some VBTs have bogus h/vtotal values */
117 if (panel_fixed_mode->hsync_end > panel_fixed_mode->htotal)
118 panel_fixed_mode->htotal = panel_fixed_mode->hsync_end + 1;
119 if (panel_fixed_mode->vsync_end > panel_fixed_mode->vtotal)
120 panel_fixed_mode->vtotal = panel_fixed_mode->vsync_end + 1;
121
122 drm_mode_set_name(panel_fixed_mode);
123}
124
Chris Wilson99834ea2011-07-13 21:01:46 +0100125static bool
126lvds_dvo_timing_equal_size(const struct lvds_dvo_timing *a,
127 const struct lvds_dvo_timing *b)
128{
129 if (a->hactive_hi != b->hactive_hi ||
130 a->hactive_lo != b->hactive_lo)
131 return false;
132
133 if (a->hsync_off_hi != b->hsync_off_hi ||
134 a->hsync_off_lo != b->hsync_off_lo)
135 return false;
136
137 if (a->hsync_pulse_width != b->hsync_pulse_width)
138 return false;
139
140 if (a->hblank_hi != b->hblank_hi ||
141 a->hblank_lo != b->hblank_lo)
142 return false;
143
144 if (a->vactive_hi != b->vactive_hi ||
145 a->vactive_lo != b->vactive_lo)
146 return false;
147
148 if (a->vsync_off != b->vsync_off)
149 return false;
150
151 if (a->vsync_pulse_width != b->vsync_pulse_width)
152 return false;
153
154 if (a->vblank_hi != b->vblank_hi ||
155 a->vblank_lo != b->vblank_lo)
156 return false;
157
158 return true;
159}
160
161static const struct lvds_dvo_timing *
162get_lvds_dvo_timing(const struct bdb_lvds_lfp_data *lvds_lfp_data,
163 const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs,
164 int index)
165{
166 /*
167 * the size of fp_timing varies on the different platform.
168 * So calculate the DVO timing relative offset in LVDS data
169 * entry to get the DVO timing entry
170 */
171
172 int lfp_data_size =
173 lvds_lfp_data_ptrs->ptr[1].dvo_timing_offset -
174 lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset;
175 int dvo_timing_offset =
176 lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset -
177 lvds_lfp_data_ptrs->ptr[0].fp_timing_offset;
178 char *entry = (char *)lvds_lfp_data->data + lfp_data_size * index;
179
180 return (struct lvds_dvo_timing *)(entry + dvo_timing_offset);
181}
182
Takashi Iwaib0354382012-03-20 13:07:05 +0100183/* 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
Ma Ling88631702009-05-13 11:19:55 +0800205/* Try to find integrated panel data */
206static void
207parse_lfp_panel_data(struct drm_i915_private *dev_priv,
Jani Nikuladcb58a42015-05-12 15:41:32 +0300208 const struct bdb_header *bdb)
Jesse Barnes79e53942008-11-07 14:24:08 -0800209{
Chris Wilson99834ea2011-07-13 21:01:46 +0100210 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;
Takashi Iwaib0354382012-03-20 13:07:05 +0100214 const struct lvds_fp_timing *fp_timing;
Jesse Barnes79e53942008-11-07 14:24:08 -0800215 struct drm_display_mode *panel_fixed_mode;
Pradeep Bhat83a72802014-03-28 10:14:57 +0530216 int i, downclock, drrs_mode;
Jesse Barnes79e53942008-11-07 14:24:08 -0800217
Jesse Barnes79e53942008-11-07 14:24:08 -0800218 lvds_options = find_section(bdb, BDB_LVDS_OPTIONS);
219 if (!lvds_options)
220 return;
221
Rodrigo Vivi41aa3442013-05-09 20:03:18 -0300222 dev_priv->vbt.lvds_dither = lvds_options->pixel_dither;
Jesse Barnes79e53942008-11-07 14:24:08 -0800223 if (lvds_options->panel_type == 0xff)
224 return;
Simon Que6a040022010-09-30 09:36:39 +0100225
Zhenyu Wang500a8cc2010-01-13 11:19:52 +0800226 panel_type = lvds_options->panel_type;
Jesse Barnes79e53942008-11-07 14:24:08 -0800227
Pradeep Bhat83a72802014-03-28 10:14:57 +0530228 drrs_mode = (lvds_options->dps_panel_type_bits
229 >> (panel_type * 2)) & MODE_MASK;
230 /*
231 * VBT has static DRRS = 0 and seamless DRRS = 2.
232 * The below piece of code is required to adjust vbt.drrs_type
233 * to match the enum drrs_support_type.
234 */
235 switch (drrs_mode) {
236 case 0:
237 dev_priv->vbt.drrs_type = STATIC_DRRS_SUPPORT;
238 DRM_DEBUG_KMS("DRRS supported mode is static\n");
239 break;
240 case 2:
241 dev_priv->vbt.drrs_type = SEAMLESS_DRRS_SUPPORT;
242 DRM_DEBUG_KMS("DRRS supported mode is seamless\n");
243 break;
244 default:
245 dev_priv->vbt.drrs_type = DRRS_NOT_SUPPORTED;
246 DRM_DEBUG_KMS("DRRS not supported (VBT input)\n");
247 break;
248 }
249
Jesse Barnes79e53942008-11-07 14:24:08 -0800250 lvds_lfp_data = find_section(bdb, BDB_LVDS_LFP_DATA);
251 if (!lvds_lfp_data)
252 return;
253
Jesse Barnes1b16de02009-06-22 11:30:30 -0700254 lvds_lfp_data_ptrs = find_section(bdb, BDB_LVDS_LFP_DATA_PTRS);
255 if (!lvds_lfp_data_ptrs)
256 return;
257
Rodrigo Vivi41aa3442013-05-09 20:03:18 -0300258 dev_priv->vbt.lvds_vbt = 1;
Jesse Barnes79e53942008-11-07 14:24:08 -0800259
Chris Wilson99834ea2011-07-13 21:01:46 +0100260 panel_dvo_timing = get_lvds_dvo_timing(lvds_lfp_data,
261 lvds_lfp_data_ptrs,
262 lvds_options->panel_type);
Jesse Barnes79e53942008-11-07 14:24:08 -0800263
Eric Anholt9a298b22009-03-24 12:23:04 -0700264 panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
Chris Wilson6edc3242010-09-12 17:16:17 +0100265 if (!panel_fixed_mode)
266 return;
Jesse Barnes79e53942008-11-07 14:24:08 -0800267
Chris Wilson99834ea2011-07-13 21:01:46 +0100268 fill_detail_timing_data(panel_fixed_mode, panel_dvo_timing);
Jesse Barnes79e53942008-11-07 14:24:08 -0800269
Rodrigo Vivi41aa3442013-05-09 20:03:18 -0300270 dev_priv->vbt.lfp_lvds_vbt_mode = panel_fixed_mode;
Jesse Barnes79e53942008-11-07 14:24:08 -0800271
Zhao Yakui28c97732009-10-09 11:39:41 +0800272 DRM_DEBUG_KMS("Found panel mode in BIOS VBT tables:\n");
Jesse Barnes79e53942008-11-07 14:24:08 -0800273 drm_mode_debug_printmodeline(panel_fixed_mode);
274
Zhao Yakuid1fcea6a2009-11-20 11:24:17 +0800275 /*
Chris Wilson99834ea2011-07-13 21:01:46 +0100276 * Iterate over the LVDS panel timing info to find the lowest clock
277 * for the native resolution.
Zhao Yakuid1fcea6a2009-11-20 11:24:17 +0800278 */
Chris Wilson99834ea2011-07-13 21:01:46 +0100279 downclock = panel_dvo_timing->clock;
Zhao Yakuid1fcea6a2009-11-20 11:24:17 +0800280 for (i = 0; i < 16; i++) {
Chris Wilson99834ea2011-07-13 21:01:46 +0100281 const struct lvds_dvo_timing *dvo_timing;
Zhao Yakuid1fcea6a2009-11-20 11:24:17 +0800282
Chris Wilson99834ea2011-07-13 21:01:46 +0100283 dvo_timing = get_lvds_dvo_timing(lvds_lfp_data,
284 lvds_lfp_data_ptrs,
285 i);
286 if (lvds_dvo_timing_equal_size(dvo_timing, panel_dvo_timing) &&
287 dvo_timing->clock < downclock)
288 downclock = dvo_timing->clock;
Zhao Yakuid1fcea6a2009-11-20 11:24:17 +0800289 }
Chris Wilson99834ea2011-07-13 21:01:46 +0100290
Jani Nikulad330a952014-01-21 11:24:25 +0200291 if (downclock < panel_dvo_timing->clock && i915.lvds_downclock) {
Zhao Yakuid1fcea6a2009-11-20 11:24:17 +0800292 dev_priv->lvds_downclock_avail = 1;
Chris Wilson99834ea2011-07-13 21:01:46 +0100293 dev_priv->lvds_downclock = downclock * 10;
Joe Perchesbbb0aef52011-04-17 20:35:52 -0700294 DRM_DEBUG_KMS("LVDS downclock is found in VBT. "
295 "Normal Clock %dKHz, downclock %dKHz\n",
Chris Wilson99834ea2011-07-13 21:01:46 +0100296 panel_fixed_mode->clock, 10*downclock);
Zhao Yakuid1fcea6a2009-11-20 11:24:17 +0800297 }
Takashi Iwaib0354382012-03-20 13:07:05 +0100298
299 fp_timing = get_lvds_fp_timing(bdb, lvds_lfp_data,
300 lvds_lfp_data_ptrs,
301 lvds_options->panel_type);
302 if (fp_timing) {
303 /* check the resolution, just to be sure */
304 if (fp_timing->x_res == panel_fixed_mode->hdisplay &&
305 fp_timing->y_res == panel_fixed_mode->vdisplay) {
Rodrigo Vivi41aa3442013-05-09 20:03:18 -0300306 dev_priv->vbt.bios_lvds_val = fp_timing->lvds_reg_val;
Takashi Iwaib0354382012-03-20 13:07:05 +0100307 DRM_DEBUG_KMS("VBT initial LVDS value %x\n",
Rodrigo Vivi41aa3442013-05-09 20:03:18 -0300308 dev_priv->vbt.bios_lvds_val);
Takashi Iwaib0354382012-03-20 13:07:05 +0100309 }
310 }
Jesse Barnes79e53942008-11-07 14:24:08 -0800311}
312
Jani Nikulaf00076d2013-12-14 20:38:29 -0200313static void
Jani Nikuladcb58a42015-05-12 15:41:32 +0300314parse_lfp_backlight(struct drm_i915_private *dev_priv,
315 const struct bdb_header *bdb)
Jani Nikulaf00076d2013-12-14 20:38:29 -0200316{
317 const struct bdb_lfp_backlight_data *backlight_data;
318 const struct bdb_lfp_backlight_data_entry *entry;
319
320 backlight_data = find_section(bdb, BDB_LVDS_BACKLIGHT);
321 if (!backlight_data)
322 return;
323
324 if (backlight_data->entry_size != sizeof(backlight_data->data[0])) {
325 DRM_DEBUG_KMS("Unsupported backlight data entry size %u\n",
326 backlight_data->entry_size);
327 return;
328 }
329
330 entry = &backlight_data->data[panel_type];
331
Jani Nikula39fbc9c2014-04-09 11:22:06 +0300332 dev_priv->vbt.backlight.present = entry->type == BDB_BACKLIGHT_TYPE_PWM;
333 if (!dev_priv->vbt.backlight.present) {
334 DRM_DEBUG_KMS("PWM backlight not present in VBT (type %u)\n",
335 entry->type);
336 return;
337 }
338
Jani Nikulaf00076d2013-12-14 20:38:29 -0200339 dev_priv->vbt.backlight.pwm_freq_hz = entry->pwm_freq_hz;
340 dev_priv->vbt.backlight.active_low_pwm = entry->active_low_pwm;
Jani Nikula1de60682014-06-24 18:27:39 +0300341 dev_priv->vbt.backlight.min_brightness = entry->min_brightness;
Jani Nikulaf00076d2013-12-14 20:38:29 -0200342 DRM_DEBUG_KMS("VBT backlight PWM modulation frequency %u Hz, "
343 "active %s, min brightness %u, level %u\n",
344 dev_priv->vbt.backlight.pwm_freq_hz,
345 dev_priv->vbt.backlight.active_low_pwm ? "low" : "high",
Jani Nikula1de60682014-06-24 18:27:39 +0300346 dev_priv->vbt.backlight.min_brightness,
Jani Nikulaf00076d2013-12-14 20:38:29 -0200347 backlight_data->level[panel_type]);
348}
349
Ma Ling88631702009-05-13 11:19:55 +0800350/* Try to find sdvo panel data */
351static void
352parse_sdvo_panel_data(struct drm_i915_private *dev_priv,
Jani Nikuladcb58a42015-05-12 15:41:32 +0300353 const struct bdb_header *bdb)
Ma Ling88631702009-05-13 11:19:55 +0800354{
Jani Nikulae8ef3b42015-04-15 15:18:28 +0300355 const struct lvds_dvo_timing *dvo_timing;
Ma Ling88631702009-05-13 11:19:55 +0800356 struct drm_display_mode *panel_fixed_mode;
Chris Wilson5a1e5b62011-01-29 16:50:25 +0000357 int index;
Ma Ling88631702009-05-13 11:19:55 +0800358
Jani Nikulad330a952014-01-21 11:24:25 +0200359 index = i915.vbt_sdvo_panel_type;
Mathias Fröhlichc10e4082012-03-01 06:44:35 +0100360 if (index == -2) {
361 DRM_DEBUG_KMS("Ignore SDVO panel mode from BIOS VBT tables.\n");
362 return;
363 }
364
Chris Wilson5a1e5b62011-01-29 16:50:25 +0000365 if (index == -1) {
Jani Nikulae8ef3b42015-04-15 15:18:28 +0300366 const struct bdb_sdvo_lvds_options *sdvo_lvds_options;
Chris Wilson5a1e5b62011-01-29 16:50:25 +0000367
368 sdvo_lvds_options = find_section(bdb, BDB_SDVO_LVDS_OPTIONS);
369 if (!sdvo_lvds_options)
370 return;
371
372 index = sdvo_lvds_options->panel_type;
373 }
Ma Ling88631702009-05-13 11:19:55 +0800374
375 dvo_timing = find_section(bdb, BDB_SDVO_PANEL_DTDS);
376 if (!dvo_timing)
377 return;
378
Eric Anholt9a298b22009-03-24 12:23:04 -0700379 panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
Ma Ling88631702009-05-13 11:19:55 +0800380 if (!panel_fixed_mode)
381 return;
382
Chris Wilson5a1e5b62011-01-29 16:50:25 +0000383 fill_detail_timing_data(panel_fixed_mode, dvo_timing + index);
Ma Ling88631702009-05-13 11:19:55 +0800384
Rodrigo Vivi41aa3442013-05-09 20:03:18 -0300385 dev_priv->vbt.sdvo_lvds_vbt_mode = panel_fixed_mode;
Ma Ling88631702009-05-13 11:19:55 +0800386
Chris Wilson5a1e5b62011-01-29 16:50:25 +0000387 DRM_DEBUG_KMS("Found SDVO panel mode in BIOS VBT tables:\n");
388 drm_mode_debug_printmodeline(panel_fixed_mode);
Ma Ling88631702009-05-13 11:19:55 +0800389}
390
Bryan Freed9a4114f2011-01-12 13:38:39 -0800391static int intel_bios_ssc_frequency(struct drm_device *dev,
392 bool alternate)
393{
394 switch (INTEL_INFO(dev)->gen) {
395 case 2:
Ville Syrjäläe91e9412013-12-09 18:54:16 +0200396 return alternate ? 66667 : 48000;
Bryan Freed9a4114f2011-01-12 13:38:39 -0800397 case 3:
398 case 4:
Ville Syrjäläe91e9412013-12-09 18:54:16 +0200399 return alternate ? 100000 : 96000;
Bryan Freed9a4114f2011-01-12 13:38:39 -0800400 default:
Ville Syrjäläe91e9412013-12-09 18:54:16 +0200401 return alternate ? 100000 : 120000;
Bryan Freed9a4114f2011-01-12 13:38:39 -0800402 }
403}
404
Jesse Barnes79e53942008-11-07 14:24:08 -0800405static void
406parse_general_features(struct drm_i915_private *dev_priv,
Jani Nikuladcb58a42015-05-12 15:41:32 +0300407 const struct bdb_header *bdb)
Jesse Barnes79e53942008-11-07 14:24:08 -0800408{
Eric Anholtbad720f2009-10-22 16:11:14 -0700409 struct drm_device *dev = dev_priv->dev;
Jani Nikulae8ef3b42015-04-15 15:18:28 +0300410 const struct bdb_general_features *general;
Jesse Barnes79e53942008-11-07 14:24:08 -0800411
Jesse Barnes79e53942008-11-07 14:24:08 -0800412 general = find_section(bdb, BDB_GENERAL_FEATURES);
413 if (general) {
Rodrigo Vivi41aa3442013-05-09 20:03:18 -0300414 dev_priv->vbt.int_tv_support = general->int_tv_support;
415 dev_priv->vbt.int_crt_support = general->int_crt_support;
416 dev_priv->vbt.lvds_use_ssc = general->enable_ssc;
417 dev_priv->vbt.lvds_ssc_freq =
Bryan Freed9a4114f2011-01-12 13:38:39 -0800418 intel_bios_ssc_frequency(dev, general->ssc_freq);
Rodrigo Vivi41aa3442013-05-09 20:03:18 -0300419 dev_priv->vbt.display_clock_mode = general->display_clock_mode;
420 dev_priv->vbt.fdi_rx_polarity_inverted = general->fdi_rx_polarity_inverted;
Paulo Zanoni3f704fa2013-04-08 15:48:07 -0300421 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",
Rodrigo Vivi41aa3442013-05-09 20:03:18 -0300422 dev_priv->vbt.int_tv_support,
423 dev_priv->vbt.int_crt_support,
424 dev_priv->vbt.lvds_use_ssc,
425 dev_priv->vbt.lvds_ssc_freq,
426 dev_priv->vbt.display_clock_mode,
427 dev_priv->vbt.fdi_rx_polarity_inverted);
Jesse Barnes79e53942008-11-07 14:24:08 -0800428 }
429}
430
yakui_zhao9b9d1722009-05-31 17:17:17 +0800431static void
David Müller (ELSOFT AG)db545012009-08-29 08:54:45 +0200432parse_general_definitions(struct drm_i915_private *dev_priv,
Jani Nikuladcb58a42015-05-12 15:41:32 +0300433 const struct bdb_header *bdb)
David Müller (ELSOFT AG)db545012009-08-29 08:54:45 +0200434{
Jani Nikulae8ef3b42015-04-15 15:18:28 +0300435 const struct bdb_general_definitions *general;
David Müller (ELSOFT AG)db545012009-08-29 08:54:45 +0200436
David Müller (ELSOFT AG)db545012009-08-29 08:54:45 +0200437 general = find_section(bdb, BDB_GENERAL_DEFINITIONS);
438 if (general) {
439 u16 block_size = get_blocksize(general);
440 if (block_size >= sizeof(*general)) {
441 int bus_pin = general->crt_ddc_gmbus_pin;
Zhao Yakui28c97732009-10-09 11:39:41 +0800442 DRM_DEBUG_KMS("crt_ddc_bus_pin: %d\n", bus_pin);
Jani Nikula88ac7932015-03-27 00:20:22 +0200443 if (intel_gmbus_is_valid_pin(dev_priv, bus_pin))
Rodrigo Vivi41aa3442013-05-09 20:03:18 -0300444 dev_priv->vbt.crt_ddc_pin = bus_pin;
David Müller (ELSOFT AG)db545012009-08-29 08:54:45 +0200445 } else {
Zhao Yakui28c97732009-10-09 11:39:41 +0800446 DRM_DEBUG_KMS("BDB_GD too small (%d). Invalid.\n",
Daniel Kurtz3bd7d902012-03-28 02:36:14 +0800447 block_size);
David Müller (ELSOFT AG)db545012009-08-29 08:54:45 +0200448 }
449 }
450}
451
Jani Nikulae8ef3b42015-04-15 15:18:28 +0300452static const union child_device_config *
453child_device_ptr(const struct bdb_general_definitions *p_defs, int i)
Ville Syrjälä90e4f152015-03-25 18:45:58 +0200454{
Jani Nikulae8ef3b42015-04-15 15:18:28 +0300455 return (const void *) &p_defs->devices[i * p_defs->child_dev_size];
Ville Syrjälä90e4f152015-03-25 18:45:58 +0200456}
457
David Müller (ELSOFT AG)db545012009-08-29 08:54:45 +0200458static void
yakui_zhao9b9d1722009-05-31 17:17:17 +0800459parse_sdvo_device_mapping(struct drm_i915_private *dev_priv,
Jani Nikuladcb58a42015-05-12 15:41:32 +0300460 const struct bdb_header *bdb)
yakui_zhao9b9d1722009-05-31 17:17:17 +0800461{
462 struct sdvo_device_mapping *p_mapping;
Jani Nikulae8ef3b42015-04-15 15:18:28 +0300463 const struct bdb_general_definitions *p_defs;
464 const union child_device_config *p_child;
yakui_zhao9b9d1722009-05-31 17:17:17 +0800465 int i, child_device_num, count;
David Müller (ELSOFT AG)db545012009-08-29 08:54:45 +0200466 u16 block_size;
yakui_zhao9b9d1722009-05-31 17:17:17 +0800467
468 p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
469 if (!p_defs) {
Chris Wilson44834a62010-08-19 16:09:23 +0100470 DRM_DEBUG_KMS("No general definition block is found, unable to construct sdvo mapping.\n");
yakui_zhao9b9d1722009-05-31 17:17:17 +0800471 return;
472 }
473 /* judge whether the size of child device meets the requirements.
474 * If the child device size obtained from general definition block
475 * is different with sizeof(struct child_device_config), skip the
476 * parsing of sdvo device info
477 */
478 if (p_defs->child_dev_size != sizeof(*p_child)) {
479 /* different child dev size . Ignore it */
Zhao Yakui28c97732009-10-09 11:39:41 +0800480 DRM_DEBUG_KMS("different child size is found. Invalid.\n");
yakui_zhao9b9d1722009-05-31 17:17:17 +0800481 return;
482 }
483 /* get the block size of general definitions */
David Müller (ELSOFT AG)db545012009-08-29 08:54:45 +0200484 block_size = get_blocksize(p_defs);
yakui_zhao9b9d1722009-05-31 17:17:17 +0800485 /* get the number of child device */
486 child_device_num = (block_size - sizeof(*p_defs)) /
Ville Syrjälä90e4f152015-03-25 18:45:58 +0200487 p_defs->child_dev_size;
yakui_zhao9b9d1722009-05-31 17:17:17 +0800488 count = 0;
489 for (i = 0; i < child_device_num; i++) {
Ville Syrjälä90e4f152015-03-25 18:45:58 +0200490 p_child = child_device_ptr(p_defs, i);
Paulo Zanoni768f69c2013-09-11 18:02:47 -0300491 if (!p_child->old.device_type) {
yakui_zhao9b9d1722009-05-31 17:17:17 +0800492 /* skip the device block if device type is invalid */
493 continue;
494 }
Paulo Zanoni768f69c2013-09-11 18:02:47 -0300495 if (p_child->old.slave_addr != SLAVE_ADDR1 &&
496 p_child->old.slave_addr != SLAVE_ADDR2) {
yakui_zhao9b9d1722009-05-31 17:17:17 +0800497 /*
498 * If the slave address is neither 0x70 nor 0x72,
499 * it is not a SDVO device. Skip it.
500 */
501 continue;
502 }
Paulo Zanoni768f69c2013-09-11 18:02:47 -0300503 if (p_child->old.dvo_port != DEVICE_PORT_DVOB &&
504 p_child->old.dvo_port != DEVICE_PORT_DVOC) {
yakui_zhao9b9d1722009-05-31 17:17:17 +0800505 /* skip the incorrect SDVO port */
Akshay Joshi0206e352011-08-16 15:34:10 -0400506 DRM_DEBUG_KMS("Incorrect SDVO port. Skip it\n");
yakui_zhao9b9d1722009-05-31 17:17:17 +0800507 continue;
508 }
Zhao Yakui28c97732009-10-09 11:39:41 +0800509 DRM_DEBUG_KMS("the SDVO device with slave addr %2x is found on"
510 " %s port\n",
Paulo Zanoni768f69c2013-09-11 18:02:47 -0300511 p_child->old.slave_addr,
512 (p_child->old.dvo_port == DEVICE_PORT_DVOB) ?
yakui_zhao9b9d1722009-05-31 17:17:17 +0800513 "SDVOB" : "SDVOC");
Paulo Zanoni768f69c2013-09-11 18:02:47 -0300514 p_mapping = &(dev_priv->sdvo_mappings[p_child->old.dvo_port - 1]);
yakui_zhao9b9d1722009-05-31 17:17:17 +0800515 if (!p_mapping->initialized) {
Paulo Zanoni768f69c2013-09-11 18:02:47 -0300516 p_mapping->dvo_port = p_child->old.dvo_port;
517 p_mapping->slave_addr = p_child->old.slave_addr;
518 p_mapping->dvo_wiring = p_child->old.dvo_wiring;
519 p_mapping->ddc_pin = p_child->old.ddc_pin;
520 p_mapping->i2c_pin = p_child->old.i2c_pin;
yakui_zhao9b9d1722009-05-31 17:17:17 +0800521 p_mapping->initialized = 1;
Adam Jackson46eb3032011-06-16 16:36:23 -0400522 DRM_DEBUG_KMS("SDVO device: dvo=%x, addr=%x, wiring=%d, ddc_pin=%d, i2c_pin=%d\n",
Chris Wilsone957d772010-09-24 12:52:03 +0100523 p_mapping->dvo_port,
524 p_mapping->slave_addr,
525 p_mapping->dvo_wiring,
526 p_mapping->ddc_pin,
Adam Jackson46eb3032011-06-16 16:36:23 -0400527 p_mapping->i2c_pin);
yakui_zhao9b9d1722009-05-31 17:17:17 +0800528 } else {
Zhao Yakui28c97732009-10-09 11:39:41 +0800529 DRM_DEBUG_KMS("Maybe one SDVO port is shared by "
yakui_zhao9b9d1722009-05-31 17:17:17 +0800530 "two SDVO device.\n");
531 }
Paulo Zanoni768f69c2013-09-11 18:02:47 -0300532 if (p_child->old.slave2_addr) {
yakui_zhao9b9d1722009-05-31 17:17:17 +0800533 /* Maybe this is a SDVO device with multiple inputs */
534 /* And the mapping info is not added */
Zhao Yakui28c97732009-10-09 11:39:41 +0800535 DRM_DEBUG_KMS("there exists the slave2_addr. Maybe this"
536 " is a SDVO device with multiple inputs.\n");
yakui_zhao9b9d1722009-05-31 17:17:17 +0800537 }
538 count++;
539 }
540
541 if (!count) {
542 /* No SDVO device info is found */
Zhao Yakui28c97732009-10-09 11:39:41 +0800543 DRM_DEBUG_KMS("No SDVO device info is found in VBT\n");
yakui_zhao9b9d1722009-05-31 17:17:17 +0800544 }
545 return;
546}
Zhenyu Wang32f9d652009-07-24 01:00:32 +0800547
548static void
549parse_driver_features(struct drm_i915_private *dev_priv,
Jani Nikuladcb58a42015-05-12 15:41:32 +0300550 const struct bdb_header *bdb)
Zhenyu Wang32f9d652009-07-24 01:00:32 +0800551{
Jani Nikulae8ef3b42015-04-15 15:18:28 +0300552 const struct bdb_driver_features *driver;
Zhenyu Wang32f9d652009-07-24 01:00:32 +0800553
Zhenyu Wang32f9d652009-07-24 01:00:32 +0800554 driver = find_section(bdb, BDB_DRIVER_FEATURES);
Jesse Barnes652c3932009-08-17 13:31:43 -0700555 if (!driver)
556 return;
557
Daniel Vetter6fca55b2013-09-21 00:48:39 +0200558 if (driver->lvds_config == BDB_DRIVER_FEATURE_EDP)
Rodrigo Vivi41aa3442013-05-09 20:03:18 -0300559 dev_priv->vbt.edp_support = 1;
Jesse Barnes652c3932009-08-17 13:31:43 -0700560
Chris Wilson5ceb0f92010-09-24 10:24:28 +0100561 if (driver->dual_frequency)
Jesse Barnes652c3932009-08-17 13:31:43 -0700562 dev_priv->render_reclock_avail = true;
Pradeep Bhat83a72802014-03-28 10:14:57 +0530563
564 DRM_DEBUG_KMS("DRRS State Enabled:%d\n", driver->drrs_enabled);
565 /*
566 * If DRRS is not supported, drrs_type has to be set to 0.
567 * This is because, VBT is configured in such a way that
568 * static DRRS is 0 and DRRS not supported is represented by
569 * driver->drrs_enabled=false
570 */
571 if (!driver->drrs_enabled)
572 dev_priv->vbt.drrs_type = DRRS_NOT_SUPPORTED;
Zhenyu Wang32f9d652009-07-24 01:00:32 +0800573}
574
Zhao Yakui6363ee62009-11-24 09:48:44 +0800575static void
Jani Nikuladcb58a42015-05-12 15:41:32 +0300576parse_edp(struct drm_i915_private *dev_priv, const struct bdb_header *bdb)
Zhenyu Wang500a8cc2010-01-13 11:19:52 +0800577{
Jani Nikulae8ef3b42015-04-15 15:18:28 +0300578 const struct bdb_edp *edp;
579 const struct edp_power_seq *edp_pps;
580 const struct edp_link_params *edp_link_params;
Zhenyu Wang500a8cc2010-01-13 11:19:52 +0800581
582 edp = find_section(bdb, BDB_EDP);
583 if (!edp) {
Daniel Vetter6fca55b2013-09-21 00:48:39 +0200584 if (dev_priv->vbt.edp_support)
Jani Nikula9a30a612012-11-12 14:33:45 +0200585 DRM_DEBUG_KMS("No eDP BDB found but eDP panel supported.\n");
Zhenyu Wang500a8cc2010-01-13 11:19:52 +0800586 return;
587 }
588
589 switch ((edp->color_depth >> (panel_type * 2)) & 3) {
590 case EDP_18BPP:
Rodrigo Vivi41aa3442013-05-09 20:03:18 -0300591 dev_priv->vbt.edp_bpp = 18;
Zhenyu Wang500a8cc2010-01-13 11:19:52 +0800592 break;
593 case EDP_24BPP:
Rodrigo Vivi41aa3442013-05-09 20:03:18 -0300594 dev_priv->vbt.edp_bpp = 24;
Zhenyu Wang500a8cc2010-01-13 11:19:52 +0800595 break;
596 case EDP_30BPP:
Rodrigo Vivi41aa3442013-05-09 20:03:18 -0300597 dev_priv->vbt.edp_bpp = 30;
Zhenyu Wang500a8cc2010-01-13 11:19:52 +0800598 break;
599 }
Chris Wilson5ceb0f92010-09-24 10:24:28 +0100600
Jesse Barnes9f0e7ff2010-10-07 16:01:14 -0700601 /* Get the eDP sequencing and link info */
602 edp_pps = &edp->power_seqs[panel_type];
603 edp_link_params = &edp->link_params[panel_type];
Chris Wilson5ceb0f92010-09-24 10:24:28 +0100604
Rodrigo Vivi41aa3442013-05-09 20:03:18 -0300605 dev_priv->vbt.edp_pps = *edp_pps;
Chris Wilson5ceb0f92010-09-24 10:24:28 +0100606
Jani Nikulae13e2b22014-05-06 14:56:51 +0300607 switch (edp_link_params->rate) {
608 case EDP_RATE_1_62:
609 dev_priv->vbt.edp_rate = DP_LINK_BW_1_62;
610 break;
611 case EDP_RATE_2_7:
612 dev_priv->vbt.edp_rate = DP_LINK_BW_2_7;
613 break;
614 default:
615 DRM_DEBUG_KMS("VBT has unknown eDP link rate value %u\n",
616 edp_link_params->rate);
617 break;
618 }
619
Jesse Barnes9f0e7ff2010-10-07 16:01:14 -0700620 switch (edp_link_params->lanes) {
Jani Nikulae13e2b22014-05-06 14:56:51 +0300621 case EDP_LANE_1:
Rodrigo Vivi41aa3442013-05-09 20:03:18 -0300622 dev_priv->vbt.edp_lanes = 1;
Jesse Barnes9f0e7ff2010-10-07 16:01:14 -0700623 break;
Jani Nikulae13e2b22014-05-06 14:56:51 +0300624 case EDP_LANE_2:
Rodrigo Vivi41aa3442013-05-09 20:03:18 -0300625 dev_priv->vbt.edp_lanes = 2;
Jesse Barnes9f0e7ff2010-10-07 16:01:14 -0700626 break;
Jani Nikulae13e2b22014-05-06 14:56:51 +0300627 case EDP_LANE_4:
Rodrigo Vivi41aa3442013-05-09 20:03:18 -0300628 dev_priv->vbt.edp_lanes = 4;
Jesse Barnes9f0e7ff2010-10-07 16:01:14 -0700629 break;
Jani Nikulae13e2b22014-05-06 14:56:51 +0300630 default:
631 DRM_DEBUG_KMS("VBT has unknown eDP lane count value %u\n",
632 edp_link_params->lanes);
633 break;
Jesse Barnes9f0e7ff2010-10-07 16:01:14 -0700634 }
Jani Nikulae13e2b22014-05-06 14:56:51 +0300635
Jesse Barnes9f0e7ff2010-10-07 16:01:14 -0700636 switch (edp_link_params->preemphasis) {
Jani Nikulae13e2b22014-05-06 14:56:51 +0300637 case EDP_PREEMPHASIS_NONE:
Sonika Jindalbd600182014-08-08 16:23:41 +0530638 dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_0;
Jesse Barnes9f0e7ff2010-10-07 16:01:14 -0700639 break;
Jani Nikulae13e2b22014-05-06 14:56:51 +0300640 case EDP_PREEMPHASIS_3_5dB:
Sonika Jindalbd600182014-08-08 16:23:41 +0530641 dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_1;
Jesse Barnes9f0e7ff2010-10-07 16:01:14 -0700642 break;
Jani Nikulae13e2b22014-05-06 14:56:51 +0300643 case EDP_PREEMPHASIS_6dB:
Sonika Jindalbd600182014-08-08 16:23:41 +0530644 dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_2;
Jesse Barnes9f0e7ff2010-10-07 16:01:14 -0700645 break;
Jani Nikulae13e2b22014-05-06 14:56:51 +0300646 case EDP_PREEMPHASIS_9_5dB:
Sonika Jindalbd600182014-08-08 16:23:41 +0530647 dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_3;
Jesse Barnes9f0e7ff2010-10-07 16:01:14 -0700648 break;
Jani Nikulae13e2b22014-05-06 14:56:51 +0300649 default:
650 DRM_DEBUG_KMS("VBT has unknown eDP pre-emphasis value %u\n",
651 edp_link_params->preemphasis);
652 break;
Jesse Barnes9f0e7ff2010-10-07 16:01:14 -0700653 }
Jani Nikulae13e2b22014-05-06 14:56:51 +0300654
Jesse Barnes9f0e7ff2010-10-07 16:01:14 -0700655 switch (edp_link_params->vswing) {
Jani Nikulae13e2b22014-05-06 14:56:51 +0300656 case EDP_VSWING_0_4V:
Sonika Jindalbd600182014-08-08 16:23:41 +0530657 dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_0;
Jesse Barnes9f0e7ff2010-10-07 16:01:14 -0700658 break;
Jani Nikulae13e2b22014-05-06 14:56:51 +0300659 case EDP_VSWING_0_6V:
Sonika Jindalbd600182014-08-08 16:23:41 +0530660 dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_1;
Jesse Barnes9f0e7ff2010-10-07 16:01:14 -0700661 break;
Jani Nikulae13e2b22014-05-06 14:56:51 +0300662 case EDP_VSWING_0_8V:
Sonika Jindalbd600182014-08-08 16:23:41 +0530663 dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_2;
Jesse Barnes9f0e7ff2010-10-07 16:01:14 -0700664 break;
Jani Nikulae13e2b22014-05-06 14:56:51 +0300665 case EDP_VSWING_1_2V:
Sonika Jindalbd600182014-08-08 16:23:41 +0530666 dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_3;
Jesse Barnes9f0e7ff2010-10-07 16:01:14 -0700667 break;
Jani Nikulae13e2b22014-05-06 14:56:51 +0300668 default:
669 DRM_DEBUG_KMS("VBT has unknown eDP voltage swing value %u\n",
670 edp_link_params->vswing);
671 break;
Jesse Barnes9f0e7ff2010-10-07 16:01:14 -0700672 }
Sonika Jindal9a57f5b2015-02-25 10:29:11 +0530673
674 if (bdb->version >= 173) {
675 uint8_t vswing;
676
Sonika Jindal9e458032015-05-06 17:35:48 +0530677 /* Don't read from VBT if module parameter has valid value*/
678 if (i915.edp_vswing) {
679 dev_priv->edp_low_vswing = i915.edp_vswing == 1;
680 } else {
681 vswing = (edp->edp_vswing_preemph >> (panel_type * 4)) & 0xF;
682 dev_priv->edp_low_vswing = vswing == 0;
683 }
Sonika Jindal9a57f5b2015-02-25 10:29:11 +0530684 }
Zhenyu Wang500a8cc2010-01-13 11:19:52 +0800685}
686
Rodrigo Vivibfd7ebd2014-11-14 08:52:30 -0800687static void
Jani Nikuladcb58a42015-05-12 15:41:32 +0300688parse_psr(struct drm_i915_private *dev_priv, const struct bdb_header *bdb)
Rodrigo Vivibfd7ebd2014-11-14 08:52:30 -0800689{
Jani Nikulae8ef3b42015-04-15 15:18:28 +0300690 const struct bdb_psr *psr;
691 const struct psr_table *psr_table;
Rodrigo Vivibfd7ebd2014-11-14 08:52:30 -0800692
693 psr = find_section(bdb, BDB_PSR);
694 if (!psr) {
695 DRM_DEBUG_KMS("No PSR BDB found.\n");
696 return;
697 }
698
699 psr_table = &psr->psr_table[panel_type];
700
701 dev_priv->vbt.psr.full_link = psr_table->full_link;
702 dev_priv->vbt.psr.require_aux_wakeup = psr_table->require_aux_to_wakeup;
703
704 /* Allowed VBT values goes from 0 to 15 */
705 dev_priv->vbt.psr.idle_frames = psr_table->idle_frames < 0 ? 0 :
706 psr_table->idle_frames > 15 ? 15 : psr_table->idle_frames;
707
708 switch (psr_table->lines_to_wait) {
709 case 0:
710 dev_priv->vbt.psr.lines_to_wait = PSR_0_LINES_TO_WAIT;
711 break;
712 case 1:
713 dev_priv->vbt.psr.lines_to_wait = PSR_1_LINE_TO_WAIT;
714 break;
715 case 2:
716 dev_priv->vbt.psr.lines_to_wait = PSR_4_LINES_TO_WAIT;
717 break;
718 case 3:
719 dev_priv->vbt.psr.lines_to_wait = PSR_8_LINES_TO_WAIT;
720 break;
721 default:
722 DRM_DEBUG_KMS("VBT has unknown PSR lines to wait %u\n",
723 psr_table->lines_to_wait);
724 break;
725 }
726
727 dev_priv->vbt.psr.tp1_wakeup_time = psr_table->tp1_wakeup_time;
728 dev_priv->vbt.psr.tp2_tp3_wakeup_time = psr_table->tp2_tp3_wakeup_time;
729}
730
Shobhit Kumard3b542f2014-04-14 11:00:34 +0530731static u8 *goto_next_sequence(u8 *data, int *size)
732{
733 u16 len;
734 int tmp = *size;
735
736 if (--tmp < 0)
737 return NULL;
738
739 /* goto first element */
740 data++;
741 while (1) {
742 switch (*data) {
743 case MIPI_SEQ_ELEM_SEND_PKT:
744 /*
745 * skip by this element payload size
746 * skip elem id, command flag and data type
747 */
Shobhit Kumarb0256cd2014-04-15 13:54:07 +0530748 tmp -= 5;
749 if (tmp < 0)
Shobhit Kumard3b542f2014-04-14 11:00:34 +0530750 return NULL;
751
752 data += 3;
753 len = *((u16 *)data);
754
Shobhit Kumarb0256cd2014-04-15 13:54:07 +0530755 tmp -= len;
756 if (tmp < 0)
Shobhit Kumard3b542f2014-04-14 11:00:34 +0530757 return NULL;
758
759 /* skip by len */
760 data = data + 2 + len;
761 break;
762 case MIPI_SEQ_ELEM_DELAY:
763 /* skip by elem id, and delay is 4 bytes */
Shobhit Kumarb0256cd2014-04-15 13:54:07 +0530764 tmp -= 5;
765 if (tmp < 0)
Shobhit Kumard3b542f2014-04-14 11:00:34 +0530766 return NULL;
767
768 data += 5;
769 break;
770 case MIPI_SEQ_ELEM_GPIO:
Shobhit Kumarb0256cd2014-04-15 13:54:07 +0530771 tmp -= 3;
772 if (tmp < 0)
Shobhit Kumard3b542f2014-04-14 11:00:34 +0530773 return NULL;
774
775 data += 3;
776 break;
777 default:
778 DRM_ERROR("Unknown element\n");
779 return NULL;
780 }
781
782 /* end of sequence ? */
783 if (*data == 0)
784 break;
785 }
786
787 /* goto next sequence or end of block byte */
788 if (--tmp < 0)
789 return NULL;
790
791 data++;
792
793 /* update amount of data left for the sequence block to be parsed */
794 *size = tmp;
795 return data;
796}
797
Zhenyu Wang500a8cc2010-01-13 11:19:52 +0800798static void
Jani Nikuladcb58a42015-05-12 15:41:32 +0300799parse_mipi(struct drm_i915_private *dev_priv, const struct bdb_header *bdb)
Shobhit Kumard17c5442013-08-27 15:12:25 +0300800{
Jani Nikulae8ef3b42015-04-15 15:18:28 +0300801 const struct bdb_mipi_config *start;
802 const struct bdb_mipi_sequence *sequence;
803 const struct mipi_config *config;
804 const struct mipi_pps_data *pps;
805 u8 *data;
806 const u8 *seq_data;
Shobhit Kumard3b542f2014-04-14 11:00:34 +0530807 int i, panel_id, seq_size;
808 u16 block_size;
Shobhit Kumard17c5442013-08-27 15:12:25 +0300809
Shobhit Kumar3e6bd012014-05-27 19:33:59 +0530810 /* parse MIPI blocks only if LFP type is MIPI */
811 if (!dev_priv->vbt.has_mipi)
812 return;
813
Shobhit Kumard3b542f2014-04-14 11:00:34 +0530814 /* Initialize this to undefined indicating no generic MIPI support */
815 dev_priv->vbt.dsi.panel_id = MIPI_DSI_UNDEFINED_PANEL_ID;
816
817 /* Block #40 is already parsed and panel_fixed_mode is
818 * stored in dev_priv->lfp_lvds_vbt_mode
819 * resuse this when needed
820 */
821
822 /* Parse #52 for panel index used from panel_type already
823 * parsed
824 */
825 start = find_section(bdb, BDB_MIPI_CONFIG);
826 if (!start) {
827 DRM_DEBUG_KMS("No MIPI config BDB found");
Shobhit Kumard17c5442013-08-27 15:12:25 +0300828 return;
829 }
830
Shobhit Kumard3b542f2014-04-14 11:00:34 +0530831 DRM_DEBUG_DRIVER("Found MIPI Config block, panel index = %d\n",
832 panel_type);
833
834 /*
835 * get hold of the correct configuration block and pps data as per
836 * the panel_type as index
837 */
838 config = &start->config[panel_type];
839 pps = &start->pps[panel_type];
840
841 /* store as of now full data. Trim when we realise all is not needed */
842 dev_priv->vbt.dsi.config = kmemdup(config, sizeof(struct mipi_config), GFP_KERNEL);
843 if (!dev_priv->vbt.dsi.config)
844 return;
845
846 dev_priv->vbt.dsi.pps = kmemdup(pps, sizeof(struct mipi_pps_data), GFP_KERNEL);
847 if (!dev_priv->vbt.dsi.pps) {
848 kfree(dev_priv->vbt.dsi.config);
849 return;
850 }
851
852 /* We have mandatory mipi config blocks. Initialize as generic panel */
Shobhit Kumarea9a6ba2014-02-28 11:18:46 +0530853 dev_priv->vbt.dsi.panel_id = MIPI_DSI_GENERIC_PANEL_ID;
Shobhit Kumard3b542f2014-04-14 11:00:34 +0530854
855 /* Check if we have sequence block as well */
856 sequence = find_section(bdb, BDB_MIPI_SEQUENCE);
857 if (!sequence) {
858 DRM_DEBUG_KMS("No MIPI Sequence found, parsing complete\n");
859 return;
860 }
861
862 DRM_DEBUG_DRIVER("Found MIPI sequence block\n");
863
864 block_size = get_blocksize(sequence);
865
866 /*
867 * parse the sequence block for individual sequences
868 */
869 dev_priv->vbt.dsi.seq_version = sequence->version;
870
871 seq_data = &sequence->data[0];
872
873 /*
874 * sequence block is variable length and hence we need to parse and
875 * get the sequence data for specific panel id
876 */
877 for (i = 0; i < MAX_MIPI_CONFIGURATIONS; i++) {
878 panel_id = *seq_data;
879 seq_size = *((u16 *) (seq_data + 1));
880 if (panel_id == panel_type)
881 break;
882
883 /* skip the sequence including seq header of 3 bytes */
884 seq_data = seq_data + 3 + seq_size;
885 if ((seq_data - &sequence->data[0]) > block_size) {
886 DRM_ERROR("Sequence start is beyond sequence block size, corrupted sequence block\n");
887 return;
888 }
889 }
890
891 if (i == MAX_MIPI_CONFIGURATIONS) {
892 DRM_ERROR("Sequence block detected but no valid configuration\n");
893 return;
894 }
895
896 /* check if found sequence is completely within the sequence block
897 * just being paranoid */
898 if (seq_size > block_size) {
899 DRM_ERROR("Corrupted sequence/size, bailing out\n");
900 return;
901 }
902
903 /* skip the panel id(1 byte) and seq size(2 bytes) */
904 dev_priv->vbt.dsi.data = kmemdup(seq_data + 3, seq_size, GFP_KERNEL);
905 if (!dev_priv->vbt.dsi.data)
906 return;
907
908 /*
909 * loop into the sequence data and split into multiple sequneces
910 * There are only 5 types of sequences as of now
911 */
912 data = dev_priv->vbt.dsi.data;
913 dev_priv->vbt.dsi.size = seq_size;
914
915 /* two consecutive 0x00 indicate end of all sequences */
916 while (1) {
917 int seq_id = *data;
918 if (MIPI_SEQ_MAX > seq_id && seq_id > MIPI_SEQ_UNDEFINED) {
919 dev_priv->vbt.dsi.sequence[seq_id] = data;
920 DRM_DEBUG_DRIVER("Found mipi sequence - %d\n", seq_id);
921 } else {
922 DRM_ERROR("undefined sequence\n");
923 goto err;
924 }
925
926 /* partial parsing to skip elements */
927 data = goto_next_sequence(data, &seq_size);
928
929 if (data == NULL) {
930 DRM_ERROR("Sequence elements going beyond block itself. Sequence block parsing failed\n");
931 goto err;
932 }
933
934 if (*data == 0)
935 break; /* end of sequence reached */
936 }
937
938 DRM_DEBUG_DRIVER("MIPI related vbt parsing complete\n");
939 return;
940err:
941 kfree(dev_priv->vbt.dsi.data);
942 dev_priv->vbt.dsi.data = NULL;
943
944 /* error during parsing so set all pointers to null
945 * because of partial parsing */
Rafael Barbalhoed3b6672014-07-24 15:16:12 +0100946 memset(dev_priv->vbt.dsi.sequence, 0, sizeof(dev_priv->vbt.dsi.sequence));
Shobhit Kumard17c5442013-08-27 15:12:25 +0300947}
948
Paulo Zanoni6acab152013-09-12 17:06:24 -0300949static void parse_ddi_port(struct drm_i915_private *dev_priv, enum port port,
Jani Nikuladcb58a42015-05-12 15:41:32 +0300950 const struct bdb_header *bdb)
Paulo Zanoni6acab152013-09-12 17:06:24 -0300951{
952 union child_device_config *it, *child = NULL;
953 struct ddi_vbt_port_info *info = &dev_priv->vbt.ddi_port_info[port];
954 uint8_t hdmi_level_shift;
955 int i, j;
Paulo Zanoni554d6af2013-09-12 17:10:11 -0300956 bool is_dvi, is_hdmi, is_dp, is_edp, is_crt;
Paulo Zanoni6bf19e72013-09-12 17:07:55 -0300957 uint8_t aux_channel;
Paulo Zanoni6acab152013-09-12 17:06:24 -0300958 /* Each DDI port can have more than one value on the "DVO Port" field,
959 * so look for all the possible values for each port and abort if more
960 * than one is found. */
961 int dvo_ports[][2] = {
962 {DVO_PORT_HDMIA, DVO_PORT_DPA},
963 {DVO_PORT_HDMIB, DVO_PORT_DPB},
964 {DVO_PORT_HDMIC, DVO_PORT_DPC},
965 {DVO_PORT_HDMID, DVO_PORT_DPD},
966 {DVO_PORT_CRT, -1 /* Port E can only be DVO_PORT_CRT */ },
967 };
968
969 /* Find the child device to use, abort if more than one found. */
970 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
971 it = dev_priv->vbt.child_dev + i;
972
973 for (j = 0; j < 2; j++) {
974 if (dvo_ports[port][j] == -1)
975 break;
976
977 if (it->common.dvo_port == dvo_ports[port][j]) {
978 if (child) {
979 DRM_DEBUG_KMS("More than one child device for port %c in VBT.\n",
980 port_name(port));
981 return;
982 }
983 child = it;
984 }
985 }
986 }
987 if (!child)
988 return;
989
Paulo Zanoni6bf19e72013-09-12 17:07:55 -0300990 aux_channel = child->raw[25];
991
Ville Syrjälä78eb06c2013-11-01 20:32:07 +0200992 is_dvi = child->common.device_type & DEVICE_TYPE_TMDS_DVI_SIGNALING;
993 is_dp = child->common.device_type & DEVICE_TYPE_DISPLAYPORT_OUTPUT;
994 is_crt = child->common.device_type & DEVICE_TYPE_ANALOG_OUTPUT;
995 is_hdmi = is_dvi && (child->common.device_type & DEVICE_TYPE_NOT_HDMI_OUTPUT) == 0;
996 is_edp = is_dp && (child->common.device_type & DEVICE_TYPE_INTERNAL_CONNECTOR);
Paulo Zanoni554d6af2013-09-12 17:10:11 -0300997
Paulo Zanoni311a2092013-09-12 17:12:18 -0300998 info->supports_dvi = is_dvi;
999 info->supports_hdmi = is_hdmi;
1000 info->supports_dp = is_dp;
1001
Paulo Zanoni554d6af2013-09-12 17:10:11 -03001002 DRM_DEBUG_KMS("Port %c VBT info: DP:%d HDMI:%d DVI:%d EDP:%d CRT:%d\n",
1003 port_name(port), is_dp, is_hdmi, is_dvi, is_edp, is_crt);
1004
1005 if (is_edp && is_dvi)
1006 DRM_DEBUG_KMS("Internal DP port %c is TMDS compatible\n",
1007 port_name(port));
1008 if (is_crt && port != PORT_E)
1009 DRM_DEBUG_KMS("Port %c is analog\n", port_name(port));
1010 if (is_crt && (is_dvi || is_dp))
1011 DRM_DEBUG_KMS("Analog port %c is also DP or TMDS compatible\n",
1012 port_name(port));
1013 if (is_dvi && (port == PORT_A || port == PORT_E))
Masanari Iida9b134942014-08-06 22:31:28 +09001014 DRM_DEBUG_KMS("Port %c is TMDS compatible\n", port_name(port));
Paulo Zanoni554d6af2013-09-12 17:10:11 -03001015 if (!is_dvi && !is_dp && !is_crt)
1016 DRM_DEBUG_KMS("Port %c is not DP/TMDS/CRT compatible\n",
1017 port_name(port));
1018 if (is_edp && (port == PORT_B || port == PORT_C || port == PORT_E))
1019 DRM_DEBUG_KMS("Port %c is internal DP\n", port_name(port));
Paulo Zanoni6bf19e72013-09-12 17:07:55 -03001020
1021 if (is_dvi) {
1022 if (child->common.ddc_pin == 0x05 && port != PORT_B)
1023 DRM_DEBUG_KMS("Unexpected DDC pin for port B\n");
1024 if (child->common.ddc_pin == 0x04 && port != PORT_C)
1025 DRM_DEBUG_KMS("Unexpected DDC pin for port C\n");
1026 if (child->common.ddc_pin == 0x06 && port != PORT_D)
1027 DRM_DEBUG_KMS("Unexpected DDC pin for port D\n");
1028 }
1029
1030 if (is_dp) {
1031 if (aux_channel == 0x40 && port != PORT_A)
1032 DRM_DEBUG_KMS("Unexpected AUX channel for port A\n");
1033 if (aux_channel == 0x10 && port != PORT_B)
1034 DRM_DEBUG_KMS("Unexpected AUX channel for port B\n");
1035 if (aux_channel == 0x20 && port != PORT_C)
1036 DRM_DEBUG_KMS("Unexpected AUX channel for port C\n");
1037 if (aux_channel == 0x30 && port != PORT_D)
1038 DRM_DEBUG_KMS("Unexpected AUX channel for port D\n");
1039 }
1040
Paulo Zanoni6acab152013-09-12 17:06:24 -03001041 if (bdb->version >= 158) {
1042 /* The VBT HDMI level shift values match the table we have. */
1043 hdmi_level_shift = child->raw[7] & 0xF;
Damien Lespiauce4dd492014-08-01 11:07:54 +01001044 DRM_DEBUG_KMS("VBT HDMI level shift for port %c: %d\n",
1045 port_name(port),
1046 hdmi_level_shift);
1047 info->hdmi_level_shift = hdmi_level_shift;
Paulo Zanoni6acab152013-09-12 17:06:24 -03001048 }
1049}
1050
1051static void parse_ddi_ports(struct drm_i915_private *dev_priv,
Jani Nikuladcb58a42015-05-12 15:41:32 +03001052 const struct bdb_header *bdb)
Paulo Zanoni6acab152013-09-12 17:06:24 -03001053{
1054 struct drm_device *dev = dev_priv->dev;
1055 enum port port;
1056
1057 if (!HAS_DDI(dev))
1058 return;
1059
1060 if (!dev_priv->vbt.child_dev_num)
1061 return;
1062
1063 if (bdb->version < 155)
1064 return;
1065
1066 for (port = PORT_A; port < I915_MAX_PORTS; port++)
1067 parse_ddi_port(dev_priv, port, bdb);
1068}
1069
Shobhit Kumard17c5442013-08-27 15:12:25 +03001070static void
Zhao Yakui6363ee62009-11-24 09:48:44 +08001071parse_device_mapping(struct drm_i915_private *dev_priv,
Jani Nikuladcb58a42015-05-12 15:41:32 +03001072 const struct bdb_header *bdb)
Zhao Yakui6363ee62009-11-24 09:48:44 +08001073{
Jani Nikulae8ef3b42015-04-15 15:18:28 +03001074 const struct bdb_general_definitions *p_defs;
1075 const union child_device_config *p_child;
1076 union child_device_config *child_dev_ptr;
Zhao Yakui6363ee62009-11-24 09:48:44 +08001077 int i, child_device_num, count;
1078 u16 block_size;
1079
1080 p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
1081 if (!p_defs) {
Chris Wilson44834a62010-08-19 16:09:23 +01001082 DRM_DEBUG_KMS("No general definition block is found, no devices defined.\n");
Zhao Yakui6363ee62009-11-24 09:48:44 +08001083 return;
1084 }
Ville Syrjälä90e4f152015-03-25 18:45:58 +02001085 if (p_defs->child_dev_size < sizeof(*p_child)) {
1086 DRM_ERROR("General definiton block child device size is too small.\n");
Zhao Yakui6363ee62009-11-24 09:48:44 +08001087 return;
1088 }
1089 /* get the block size of general definitions */
1090 block_size = get_blocksize(p_defs);
1091 /* get the number of child device */
1092 child_device_num = (block_size - sizeof(*p_defs)) /
Ville Syrjälä90e4f152015-03-25 18:45:58 +02001093 p_defs->child_dev_size;
Zhao Yakui6363ee62009-11-24 09:48:44 +08001094 count = 0;
1095 /* get the number of child device that is present */
1096 for (i = 0; i < child_device_num; i++) {
Ville Syrjälä90e4f152015-03-25 18:45:58 +02001097 p_child = child_device_ptr(p_defs, i);
Paulo Zanoni768f69c2013-09-11 18:02:47 -03001098 if (!p_child->common.device_type) {
Zhao Yakui6363ee62009-11-24 09:48:44 +08001099 /* skip the device block if device type is invalid */
1100 continue;
1101 }
1102 count++;
1103 }
1104 if (!count) {
Akshay Joshi0206e352011-08-16 15:34:10 -04001105 DRM_DEBUG_KMS("no child dev is parsed from VBT\n");
Zhao Yakui6363ee62009-11-24 09:48:44 +08001106 return;
1107 }
Rodrigo Vivi41aa3442013-05-09 20:03:18 -03001108 dev_priv->vbt.child_dev = kcalloc(count, sizeof(*p_child), GFP_KERNEL);
1109 if (!dev_priv->vbt.child_dev) {
Zhao Yakui6363ee62009-11-24 09:48:44 +08001110 DRM_DEBUG_KMS("No memory space for child device\n");
1111 return;
1112 }
1113
Rodrigo Vivi41aa3442013-05-09 20:03:18 -03001114 dev_priv->vbt.child_dev_num = count;
Zhao Yakui6363ee62009-11-24 09:48:44 +08001115 count = 0;
1116 for (i = 0; i < child_device_num; i++) {
Ville Syrjälä90e4f152015-03-25 18:45:58 +02001117 p_child = child_device_ptr(p_defs, i);
Paulo Zanoni768f69c2013-09-11 18:02:47 -03001118 if (!p_child->common.device_type) {
Zhao Yakui6363ee62009-11-24 09:48:44 +08001119 /* skip the device block if device type is invalid */
1120 continue;
1121 }
Shobhit Kumar3e6bd012014-05-27 19:33:59 +05301122
1123 if (p_child->common.dvo_port >= DVO_PORT_MIPIA
1124 && p_child->common.dvo_port <= DVO_PORT_MIPID
1125 &&p_child->common.device_type & DEVICE_TYPE_MIPI_OUTPUT) {
1126 DRM_DEBUG_KMS("Found MIPI as LFP\n");
1127 dev_priv->vbt.has_mipi = 1;
1128 dev_priv->vbt.dsi.port = p_child->common.dvo_port;
1129 }
1130
Rodrigo Vivi41aa3442013-05-09 20:03:18 -03001131 child_dev_ptr = dev_priv->vbt.child_dev + count;
Zhao Yakui6363ee62009-11-24 09:48:44 +08001132 count++;
Jani Nikulae8ef3b42015-04-15 15:18:28 +03001133 memcpy(child_dev_ptr, p_child, sizeof(*p_child));
Zhao Yakui6363ee62009-11-24 09:48:44 +08001134 }
1135 return;
1136}
Chris Wilson44834a62010-08-19 16:09:23 +01001137
Simon Que6a040022010-09-30 09:36:39 +01001138static void
1139init_vbt_defaults(struct drm_i915_private *dev_priv)
1140{
Bryan Freed9a4114f2011-01-12 13:38:39 -08001141 struct drm_device *dev = dev_priv->dev;
Paulo Zanoni6acab152013-09-12 17:06:24 -03001142 enum port port;
Bryan Freed9a4114f2011-01-12 13:38:39 -08001143
Jani Nikula988c7012015-03-27 00:20:19 +02001144 dev_priv->vbt.crt_ddc_pin = GMBUS_PIN_VGADDC;
Simon Que6a040022010-09-30 09:36:39 +01001145
Jani Nikula56c4b632014-06-17 15:47:05 +03001146 /* Default to having backlight */
1147 dev_priv->vbt.backlight.present = true;
1148
Simon Que6a040022010-09-30 09:36:39 +01001149 /* LFP panel data */
Rodrigo Vivi41aa3442013-05-09 20:03:18 -03001150 dev_priv->vbt.lvds_dither = 1;
1151 dev_priv->vbt.lvds_vbt = 0;
Simon Que6a040022010-09-30 09:36:39 +01001152
1153 /* SDVO panel data */
Rodrigo Vivi41aa3442013-05-09 20:03:18 -03001154 dev_priv->vbt.sdvo_lvds_vbt_mode = NULL;
Simon Que6a040022010-09-30 09:36:39 +01001155
1156 /* general features */
Rodrigo Vivi41aa3442013-05-09 20:03:18 -03001157 dev_priv->vbt.int_tv_support = 1;
1158 dev_priv->vbt.int_crt_support = 1;
Bryan Freed9a4114f2011-01-12 13:38:39 -08001159
1160 /* Default to using SSC */
Rodrigo Vivi41aa3442013-05-09 20:03:18 -03001161 dev_priv->vbt.lvds_use_ssc = 1;
Duncan Laurief69e5152013-11-13 17:59:43 -08001162 /*
1163 * Core/SandyBridge/IvyBridge use alternative (120MHz) reference
1164 * clock for LVDS.
1165 */
1166 dev_priv->vbt.lvds_ssc_freq = intel_bios_ssc_frequency(dev,
1167 !HAS_PCH_SPLIT(dev));
Ville Syrjäläe91e9412013-12-09 18:54:16 +02001168 DRM_DEBUG_KMS("Set default to SSC at %d kHz\n", dev_priv->vbt.lvds_ssc_freq);
Paulo Zanoni6acab152013-09-12 17:06:24 -03001169
1170 for (port = PORT_A; port < I915_MAX_PORTS; port++) {
Paulo Zanoni311a2092013-09-12 17:12:18 -03001171 struct ddi_vbt_port_info *info =
1172 &dev_priv->vbt.ddi_port_info[port];
1173
Damien Lespiauce4dd492014-08-01 11:07:54 +01001174 info->hdmi_level_shift = HDMI_LEVEL_SHIFT_UNKNOWN;
Paulo Zanoni311a2092013-09-12 17:12:18 -03001175
1176 info->supports_dvi = (port != PORT_A && port != PORT_E);
1177 info->supports_hdmi = info->supports_dvi;
1178 info->supports_dp = (port != PORT_E);
Paulo Zanoni6acab152013-09-12 17:06:24 -03001179 }
Simon Que6a040022010-09-30 09:36:39 +01001180}
1181
Mathias Krausebbe1c272014-08-27 18:41:19 +02001182static int intel_no_opregion_vbt_callback(const struct dmi_system_id *id)
Daniel Vetter25e341c2012-03-24 23:51:30 +01001183{
1184 DRM_DEBUG_KMS("Falling back to manually reading VBT from "
1185 "VBIOS ROM for %s\n",
1186 id->ident);
1187 return 1;
1188}
1189
1190static const struct dmi_system_id intel_no_opregion_vbt[] = {
1191 {
1192 .callback = intel_no_opregion_vbt_callback,
1193 .ident = "ThinkCentre A57",
1194 .matches = {
1195 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1196 DMI_MATCH(DMI_PRODUCT_NAME, "97027RG"),
1197 },
1198 },
1199 { }
1200};
1201
Jani Nikulaacbb4792015-05-13 15:34:05 +03001202static const struct bdb_header *validate_vbt(const void __iomem *_base,
1203 size_t size,
1204 const void __iomem *_vbt,
Jani Nikuladcb58a42015-05-12 15:41:32 +03001205 const char *source)
Chris Wilson3dd4e842014-04-18 18:04:22 -03001206{
Jani Nikulaacbb4792015-05-13 15:34:05 +03001207 /*
1208 * This is the one place where we explicitly discard the address space
1209 * (__iomem) of the BIOS/VBT. (And this will cause a sparse complaint.)
1210 * From now on everything is based on 'base', and treated as regular
1211 * memory.
1212 */
1213 const void *base = (const void *) _base;
1214 size_t offset = _vbt - _base;
1215 const struct vbt_header *vbt = base + offset;
Jani Nikuladcb58a42015-05-12 15:41:32 +03001216 const struct bdb_header *bdb;
Chris Wilson3dd4e842014-04-18 18:04:22 -03001217
Chris Wilson3dd4e842014-04-18 18:04:22 -03001218 if (offset + sizeof(struct vbt_header) > size) {
1219 DRM_DEBUG_DRIVER("VBT header incomplete\n");
1220 return NULL;
1221 }
1222
1223 if (memcmp(vbt->signature, "$VBT", 4)) {
1224 DRM_DEBUG_DRIVER("VBT invalid signature\n");
1225 return NULL;
1226 }
1227
1228 offset += vbt->bdb_offset;
1229 if (offset + sizeof(struct bdb_header) > size) {
1230 DRM_DEBUG_DRIVER("BDB header incomplete\n");
1231 return NULL;
1232 }
1233
Jani Nikuladcb58a42015-05-12 15:41:32 +03001234 bdb = base + offset;
Chris Wilson3dd4e842014-04-18 18:04:22 -03001235 if (offset + bdb->bdb_size > size) {
1236 DRM_DEBUG_DRIVER("BDB incomplete\n");
1237 return NULL;
1238 }
1239
1240 DRM_DEBUG_KMS("Using VBT from %s: %20s\n",
1241 source, vbt->signature);
1242 return bdb;
1243}
1244
Jani Nikulaacbb4792015-05-13 15:34:05 +03001245static const struct bdb_header *find_vbt(void __iomem *bios, size_t size)
Jani Nikulab34a9912015-05-13 15:34:04 +03001246{
1247 const struct bdb_header *bdb = NULL;
1248 size_t i;
1249
1250 /* Scour memory looking for the VBT signature. */
1251 for (i = 0; i + 4 < size; i++) {
Jani Nikulaacbb4792015-05-13 15:34:05 +03001252 if (ioread32(bios + i) == *((const u32 *) "$VBT")) {
Jani Nikulab34a9912015-05-13 15:34:04 +03001253 bdb = validate_vbt(bios, size, bios + i, "PCI ROM");
1254 break;
1255 }
1256 }
1257
1258 return bdb;
1259}
1260
Jesse Barnes79e53942008-11-07 14:24:08 -08001261/**
Bryan Freed6d139a82010-10-14 09:14:51 +01001262 * intel_parse_bios - find VBT and initialize settings from the BIOS
Jesse Barnes79e53942008-11-07 14:24:08 -08001263 * @dev: DRM device
1264 *
1265 * Loads the Video BIOS and checks that the VBT exists. Sets scratch registers
1266 * to appropriate values.
1267 *
Jesse Barnes79e53942008-11-07 14:24:08 -08001268 * Returns 0 on success, nonzero on failure.
1269 */
Dan Carpenter0317c6c2012-06-27 12:10:30 +03001270int
Bryan Freed6d139a82010-10-14 09:14:51 +01001271intel_parse_bios(struct drm_device *dev)
Jesse Barnes79e53942008-11-07 14:24:08 -08001272{
1273 struct drm_i915_private *dev_priv = dev->dev_private;
1274 struct pci_dev *pdev = dev->pdev;
Jani Nikuladcb58a42015-05-12 15:41:32 +03001275 const struct bdb_header *bdb = NULL;
Chris Wilson44834a62010-08-19 16:09:23 +01001276 u8 __iomem *bios = NULL;
Jesse Barnes79e53942008-11-07 14:24:08 -08001277
Ben Widawskyab5c6082013-04-05 13:12:41 -07001278 if (HAS_PCH_NOP(dev))
1279 return -ENODEV;
1280
Simon Que6a040022010-09-30 09:36:39 +01001281 init_vbt_defaults(dev_priv);
Chris Wilsonf899fc62010-07-20 15:44:45 -07001282
Chris Wilson44834a62010-08-19 16:09:23 +01001283 /* XXX Should this validation be moved to intel_opregion.c? */
Chris Wilson3dd4e842014-04-18 18:04:22 -03001284 if (!dmi_check_system(intel_no_opregion_vbt) && dev_priv->opregion.vbt)
Jani Nikuladcb58a42015-05-12 15:41:32 +03001285 bdb = validate_vbt(dev_priv->opregion.header, OPREGION_SIZE,
1286 dev_priv->opregion.vbt, "OpRegion");
Jesse Barnes79e53942008-11-07 14:24:08 -08001287
Chris Wilson44834a62010-08-19 16:09:23 +01001288 if (bdb == NULL) {
Jani Nikulab34a9912015-05-13 15:34:04 +03001289 size_t size;
Chris Wilson44834a62010-08-19 16:09:23 +01001290
1291 bios = pci_map_rom(pdev, &size);
1292 if (!bios)
1293 return -1;
1294
Jani Nikulab34a9912015-05-13 15:34:04 +03001295 bdb = find_vbt(bios, size);
Chris Wilson3dd4e842014-04-18 18:04:22 -03001296 if (!bdb) {
Chris Wilson44834a62010-08-19 16:09:23 +01001297 pci_unmap_rom(pdev, bios);
1298 return -1;
1299 }
Chris Wilson44834a62010-08-19 16:09:23 +01001300 }
Jesse Barnes79e53942008-11-07 14:24:08 -08001301
1302 /* Grab useful general definitions */
1303 parse_general_features(dev_priv, bdb);
David Müller (ELSOFT AG)db545012009-08-29 08:54:45 +02001304 parse_general_definitions(dev_priv, bdb);
Ma Ling88631702009-05-13 11:19:55 +08001305 parse_lfp_panel_data(dev_priv, bdb);
Jani Nikulaf00076d2013-12-14 20:38:29 -02001306 parse_lfp_backlight(dev_priv, bdb);
Ma Ling88631702009-05-13 11:19:55 +08001307 parse_sdvo_panel_data(dev_priv, bdb);
yakui_zhao9b9d1722009-05-31 17:17:17 +08001308 parse_sdvo_device_mapping(dev_priv, bdb);
Zhao Yakui6363ee62009-11-24 09:48:44 +08001309 parse_device_mapping(dev_priv, bdb);
Zhenyu Wang32f9d652009-07-24 01:00:32 +08001310 parse_driver_features(dev_priv, bdb);
Zhenyu Wang500a8cc2010-01-13 11:19:52 +08001311 parse_edp(dev_priv, bdb);
Rodrigo Vivibfd7ebd2014-11-14 08:52:30 -08001312 parse_psr(dev_priv, bdb);
Shobhit Kumard17c5442013-08-27 15:12:25 +03001313 parse_mipi(dev_priv, bdb);
Paulo Zanoni6acab152013-09-12 17:06:24 -03001314 parse_ddi_ports(dev_priv, bdb);
Zhenyu Wang32f9d652009-07-24 01:00:32 +08001315
Chris Wilson44834a62010-08-19 16:09:23 +01001316 if (bios)
1317 pci_unmap_rom(pdev, bios);
Jesse Barnes79e53942008-11-07 14:24:08 -08001318
1319 return 0;
1320}
Bryan Freed6d139a82010-10-14 09:14:51 +01001321
1322/* Ensure that vital registers have been initialised, even if the BIOS
1323 * is absent or just failing to do its job.
1324 */
1325void intel_setup_bios(struct drm_device *dev)
1326{
1327 struct drm_i915_private *dev_priv = dev->dev_private;
1328
1329 /* Set the Panel Power On/Off timings if uninitialized. */
Damien Lespiau42d42e72012-10-31 19:23:16 +00001330 if (!HAS_PCH_SPLIT(dev) &&
1331 I915_READ(PP_ON_DELAYS) == 0 && I915_READ(PP_OFF_DELAYS) == 0) {
Bryan Freed6d139a82010-10-14 09:14:51 +01001332 /* Set T2 to 40ms and T5 to 200ms */
1333 I915_WRITE(PP_ON_DELAYS, 0x019007d0);
1334
1335 /* Set T3 to 35ms and Tx to 200ms */
1336 I915_WRITE(PP_OFF_DELAYS, 0x015e07d0);
1337 }
1338}