2 * Copyright (c) 2006 Luc Verhaegen (quirks list)
3 * Copyright (c) 2007-2008 Intel Corporation
4 * Jesse Barnes <jesse.barnes@intel.com>
5 * Copyright 2010 Red Hat, Inc.
7 * DDC probing routines (drm_ddc_read & drm_do_probe_ddc_edid) originally from
9 * Copyright (C) 2006 Dennis Munsie <dmunsie@cecropia.com>
11 * Permission is hereby granted, free of charge, to any person obtaining a
12 * copy of this software and associated documentation files (the "Software"),
13 * to deal in the Software without restriction, including without limitation
14 * the rights to use, copy, modify, merge, publish, distribute, sub license,
15 * and/or sell copies of the Software, and to permit persons to whom the
16 * Software is furnished to do so, subject to the following conditions:
18 * The above copyright notice and this permission notice (including the
19 * next paragraph) shall be included in all copies or substantial portions
22 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
23 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
24 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
25 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
26 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
27 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
28 * DEALINGS IN THE SOFTWARE.
30 #include <linux/kernel.h>
31 #include <linux/slab.h>
32 #include <linux/i2c.h>
33 #include <linux/export.h>
36 #include "drm_edid_modes.h"
38 #define version_greater(edid, maj, min) \
39 (((edid)->version > (maj)) || \
40 ((edid)->version == (maj) && (edid)->revision > (min)))
42 #define EDID_EST_TIMINGS 16
43 #define EDID_STD_TIMINGS 8
44 #define EDID_DETAILED_TIMINGS 4
47 * EDID blocks out in the wild have a variety of bugs, try to collect
48 * them here (note that userspace may work around broken monitors first,
49 * but fixes should make their way here so that the kernel "just works"
50 * on as many displays as possible).
53 /* First detailed mode wrong, use largest 60Hz mode */
54 #define EDID_QUIRK_PREFER_LARGE_60 (1 << 0)
55 /* Reported 135MHz pixel clock is too high, needs adjustment */
56 #define EDID_QUIRK_135_CLOCK_TOO_HIGH (1 << 1)
57 /* Prefer the largest mode at 75 Hz */
58 #define EDID_QUIRK_PREFER_LARGE_75 (1 << 2)
59 /* Detail timing is in cm not mm */
60 #define EDID_QUIRK_DETAILED_IN_CM (1 << 3)
61 /* Detailed timing descriptors have bogus size values, so just take the
62 * maximum size and use that.
64 #define EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE (1 << 4)
65 /* Monitor forgot to set the first detailed is preferred bit. */
66 #define EDID_QUIRK_FIRST_DETAILED_PREFERRED (1 << 5)
67 /* use +hsync +vsync for detailed mode */
68 #define EDID_QUIRK_DETAILED_SYNC_PP (1 << 6)
70 struct detailed_mode_closure {
71 struct drm_connector *connector;
83 static struct edid_quirk {
87 } edid_quirk_list[] = {
89 { "ACR", 44358, EDID_QUIRK_PREFER_LARGE_60 },
91 { "API", 0x7602, EDID_QUIRK_PREFER_LARGE_60 },
93 { "ACR", 2423, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
95 /* Belinea 10 15 55 */
96 { "MAX", 1516, EDID_QUIRK_PREFER_LARGE_60 },
97 { "MAX", 0x77e, EDID_QUIRK_PREFER_LARGE_60 },
99 /* Envision Peripherals, Inc. EN-7100e */
100 { "EPI", 59264, EDID_QUIRK_135_CLOCK_TOO_HIGH },
101 /* Envision EN2028 */
102 { "EPI", 8232, EDID_QUIRK_PREFER_LARGE_60 },
104 /* Funai Electronics PM36B */
105 { "FCM", 13600, EDID_QUIRK_PREFER_LARGE_75 |
106 EDID_QUIRK_DETAILED_IN_CM },
108 /* LG Philips LCD LP154W01-A5 */
109 { "LPL", 0, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE },
110 { "LPL", 0x2a00, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE },
112 /* Philips 107p5 CRT */
113 { "PHL", 57364, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
116 { "PTS", 765, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
118 /* Samsung SyncMaster 205BW. Note: irony */
119 { "SAM", 541, EDID_QUIRK_DETAILED_SYNC_PP },
120 /* Samsung SyncMaster 22[5-6]BW */
121 { "SAM", 596, EDID_QUIRK_PREFER_LARGE_60 },
122 { "SAM", 638, EDID_QUIRK_PREFER_LARGE_60 },
125 /*** DDC fetch and block validation ***/
127 static const u8 edid_header[] = {
128 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00
132 * Sanity check the header of the base EDID block. Return 8 if the header
133 * is perfect, down to 0 if it's totally wrong.
135 int drm_edid_header_is_valid(const u8 *raw_edid)
139 for (i = 0; i < sizeof(edid_header); i++)
140 if (raw_edid[i] == edid_header[i])
145 EXPORT_SYMBOL(drm_edid_header_is_valid);
149 * Sanity check the EDID block (base or extension). Return 0 if the block
150 * doesn't check out, or 1 if it's valid.
152 bool drm_edid_block_valid(u8 *raw_edid)
156 struct edid *edid = (struct edid *)raw_edid;
158 if (raw_edid[0] == 0x00) {
159 int score = drm_edid_header_is_valid(raw_edid);
161 else if (score >= 6) {
162 DRM_DEBUG("Fixing EDID header, your hardware may be failing\n");
163 memcpy(raw_edid, edid_header, sizeof(edid_header));
169 for (i = 0; i < EDID_LENGTH; i++)
172 DRM_ERROR("EDID checksum is invalid, remainder is %d\n", csum);
174 /* allow CEA to slide through, switches mangle this */
175 if (raw_edid[0] != 0x02)
179 /* per-block-type checks */
180 switch (raw_edid[0]) {
182 if (edid->version != 1) {
183 DRM_ERROR("EDID has major version %d, instead of 1\n", edid->version);
187 if (edid->revision > 4)
188 DRM_DEBUG("EDID minor > 4, assuming backward compatibility\n");
199 printk(KERN_ERR "Raw EDID:\n");
200 print_hex_dump(KERN_ERR, " \t", DUMP_PREFIX_NONE, 16, 1,
201 raw_edid, EDID_LENGTH, false);
205 EXPORT_SYMBOL(drm_edid_block_valid);
208 * drm_edid_is_valid - sanity check EDID data
211 * Sanity-check an entire EDID record (including extensions)
213 bool drm_edid_is_valid(struct edid *edid)
216 u8 *raw = (u8 *)edid;
221 for (i = 0; i <= edid->extensions; i++)
222 if (!drm_edid_block_valid(raw + i * EDID_LENGTH))
227 EXPORT_SYMBOL(drm_edid_is_valid);
229 #define DDC_SEGMENT_ADDR 0x30
231 * Get EDID information via I2C.
233 * \param adapter : i2c device adaptor
234 * \param buf : EDID data buffer to be filled
235 * \param len : EDID data buffer length
236 * \return 0 on success or -1 on failure.
238 * Try to fetch EDID information by calling i2c driver function.
241 drm_do_probe_ddc_edid(struct i2c_adapter *adapter, unsigned char *buf,
244 unsigned char start = block * EDID_LENGTH;
245 int ret, retries = 5;
247 /* The core i2c driver will automatically retry the transfer if the
248 * adapter reports EAGAIN. However, we find that bit-banging transfers
249 * are susceptible to errors under a heavily loaded machine and
250 * generate spurious NAKs and timeouts. Retrying the transfer
251 * of the individual block a few times seems to overcome this.
254 struct i2c_msg msgs[] = {
267 ret = i2c_transfer(adapter, msgs, 2);
269 DRM_DEBUG_KMS("drm: skipping non-existent adapter %s\n",
273 } while (ret != 2 && --retries);
275 return ret == 2 ? 0 : -1;
278 static bool drm_edid_is_zero(u8 *in_edid, int length)
281 u32 *raw_edid = (u32 *)in_edid;
283 for (i = 0; i < length / 4; i++)
284 if (*(raw_edid + i) != 0)
290 drm_do_get_edid(struct drm_connector *connector, struct i2c_adapter *adapter)
292 int i, j = 0, valid_extensions = 0;
295 if ((block = kmalloc(EDID_LENGTH, GFP_KERNEL)) == NULL)
298 /* base block fetch */
299 for (i = 0; i < 4; i++) {
300 if (drm_do_probe_ddc_edid(adapter, block, 0, EDID_LENGTH))
302 if (drm_edid_block_valid(block))
304 if (i == 0 && drm_edid_is_zero(block, EDID_LENGTH)) {
305 connector->null_edid_counter++;
312 /* if there's no extensions, we're done */
313 if (block[0x7e] == 0)
316 new = krealloc(block, (block[0x7e] + 1) * EDID_LENGTH, GFP_KERNEL);
321 for (j = 1; j <= block[0x7e]; j++) {
322 for (i = 0; i < 4; i++) {
323 if (drm_do_probe_ddc_edid(adapter,
324 block + (valid_extensions + 1) * EDID_LENGTH,
327 if (drm_edid_block_valid(block + (valid_extensions + 1) * EDID_LENGTH)) {
333 dev_warn(connector->dev->dev,
334 "%s: Ignoring invalid EDID block %d.\n",
335 drm_get_connector_name(connector), j);
338 if (valid_extensions != block[0x7e]) {
339 block[EDID_LENGTH-1] += block[0x7e] - valid_extensions;
340 block[0x7e] = valid_extensions;
341 new = krealloc(block, (valid_extensions + 1) * EDID_LENGTH, GFP_KERNEL);
350 dev_warn(connector->dev->dev, "%s: EDID block %d invalid.\n",
351 drm_get_connector_name(connector), j);
359 * Probe DDC presence.
361 * \param adapter : i2c device adaptor
362 * \return 1 on success
365 drm_probe_ddc(struct i2c_adapter *adapter)
369 return (drm_do_probe_ddc_edid(adapter, &out, 0, 1) == 0);
373 * drm_get_edid - get EDID data, if available
374 * @connector: connector we're probing
375 * @adapter: i2c adapter to use for DDC
377 * Poke the given i2c channel to grab EDID data if possible. If found,
378 * attach it to the connector.
380 * Return edid data or NULL if we couldn't find any.
382 struct edid *drm_get_edid(struct drm_connector *connector,
383 struct i2c_adapter *adapter)
385 struct edid *edid = NULL;
387 if (drm_probe_ddc(adapter))
388 edid = (struct edid *)drm_do_get_edid(connector, adapter);
390 connector->display_info.raw_edid = (char *)edid;
395 EXPORT_SYMBOL(drm_get_edid);
397 /*** EDID parsing ***/
400 * edid_vendor - match a string against EDID's obfuscated vendor field
401 * @edid: EDID to match
402 * @vendor: vendor string
404 * Returns true if @vendor is in @edid, false otherwise
406 static bool edid_vendor(struct edid *edid, char *vendor)
410 edid_vendor[0] = ((edid->mfg_id[0] & 0x7c) >> 2) + '@';
411 edid_vendor[1] = (((edid->mfg_id[0] & 0x3) << 3) |
412 ((edid->mfg_id[1] & 0xe0) >> 5)) + '@';
413 edid_vendor[2] = (edid->mfg_id[1] & 0x1f) + '@';
415 return !strncmp(edid_vendor, vendor, 3);
419 * edid_get_quirks - return quirk flags for a given EDID
420 * @edid: EDID to process
422 * This tells subsequent routines what fixes they need to apply.
424 static u32 edid_get_quirks(struct edid *edid)
426 struct edid_quirk *quirk;
429 for (i = 0; i < ARRAY_SIZE(edid_quirk_list); i++) {
430 quirk = &edid_quirk_list[i];
432 if (edid_vendor(edid, quirk->vendor) &&
433 (EDID_PRODUCT_ID(edid) == quirk->product_id))
434 return quirk->quirks;
440 #define MODE_SIZE(m) ((m)->hdisplay * (m)->vdisplay)
441 #define MODE_REFRESH_DIFF(m,r) (abs((m)->vrefresh - target_refresh))
444 * edid_fixup_preferred - set preferred modes based on quirk list
445 * @connector: has mode list to fix up
446 * @quirks: quirks list
448 * Walk the mode list for @connector, clearing the preferred status
449 * on existing modes and setting it anew for the right mode ala @quirks.
451 static void edid_fixup_preferred(struct drm_connector *connector,
454 struct drm_display_mode *t, *cur_mode, *preferred_mode;
455 int target_refresh = 0;
457 if (list_empty(&connector->probed_modes))
460 if (quirks & EDID_QUIRK_PREFER_LARGE_60)
462 if (quirks & EDID_QUIRK_PREFER_LARGE_75)
465 preferred_mode = list_first_entry(&connector->probed_modes,
466 struct drm_display_mode, head);
468 list_for_each_entry_safe(cur_mode, t, &connector->probed_modes, head) {
469 cur_mode->type &= ~DRM_MODE_TYPE_PREFERRED;
471 if (cur_mode == preferred_mode)
474 /* Largest mode is preferred */
475 if (MODE_SIZE(cur_mode) > MODE_SIZE(preferred_mode))
476 preferred_mode = cur_mode;
478 /* At a given size, try to get closest to target refresh */
479 if ((MODE_SIZE(cur_mode) == MODE_SIZE(preferred_mode)) &&
480 MODE_REFRESH_DIFF(cur_mode, target_refresh) <
481 MODE_REFRESH_DIFF(preferred_mode, target_refresh)) {
482 preferred_mode = cur_mode;
486 preferred_mode->type |= DRM_MODE_TYPE_PREFERRED;
490 mode_is_rb(const struct drm_display_mode *mode)
492 return (mode->htotal - mode->hdisplay == 160) &&
493 (mode->hsync_end - mode->hdisplay == 80) &&
494 (mode->hsync_end - mode->hsync_start == 32) &&
495 (mode->vsync_start - mode->vdisplay == 3);
499 * drm_mode_find_dmt - Create a copy of a mode if present in DMT
500 * @dev: Device to duplicate against
502 * @vsize: Mode height
503 * @fresh: Mode refresh rate
504 * @rb: Mode reduced-blanking-ness
506 * Walk the DMT mode list looking for a match for the given parameters.
507 * Return a newly allocated copy of the mode, or NULL if not found.
509 struct drm_display_mode *drm_mode_find_dmt(struct drm_device *dev,
510 int hsize, int vsize, int fresh,
515 for (i = 0; i < drm_num_dmt_modes; i++) {
516 const struct drm_display_mode *ptr = &drm_dmt_modes[i];
517 if (hsize != ptr->hdisplay)
519 if (vsize != ptr->vdisplay)
521 if (fresh != drm_mode_vrefresh(ptr))
523 if (rb != mode_is_rb(ptr))
526 return drm_mode_duplicate(dev, ptr);
531 EXPORT_SYMBOL(drm_mode_find_dmt);
533 typedef void detailed_cb(struct detailed_timing *timing, void *closure);
536 cea_for_each_detailed_block(u8 *ext, detailed_cb *cb, void *closure)
540 u8 *det_base = ext + d;
543 for (i = 0; i < n; i++)
544 cb((struct detailed_timing *)(det_base + 18 * i), closure);
548 vtb_for_each_detailed_block(u8 *ext, detailed_cb *cb, void *closure)
550 unsigned int i, n = min((int)ext[0x02], 6);
551 u8 *det_base = ext + 5;
554 return; /* unknown version */
556 for (i = 0; i < n; i++)
557 cb((struct detailed_timing *)(det_base + 18 * i), closure);
561 drm_for_each_detailed_block(u8 *raw_edid, detailed_cb *cb, void *closure)
564 struct edid *edid = (struct edid *)raw_edid;
569 for (i = 0; i < EDID_DETAILED_TIMINGS; i++)
570 cb(&(edid->detailed_timings[i]), closure);
572 for (i = 1; i <= raw_edid[0x7e]; i++) {
573 u8 *ext = raw_edid + (i * EDID_LENGTH);
576 cea_for_each_detailed_block(ext, cb, closure);
579 vtb_for_each_detailed_block(ext, cb, closure);
588 is_rb(struct detailed_timing *t, void *data)
591 if (r[3] == EDID_DETAIL_MONITOR_RANGE)
593 *(bool *)data = true;
596 /* EDID 1.4 defines this explicitly. For EDID 1.3, we guess, badly. */
598 drm_monitor_supports_rb(struct edid *edid)
600 if (edid->revision >= 4) {
602 drm_for_each_detailed_block((u8 *)edid, is_rb, &ret);
606 return ((edid->input & DRM_EDID_INPUT_DIGITAL) != 0);
610 find_gtf2(struct detailed_timing *t, void *data)
613 if (r[3] == EDID_DETAIL_MONITOR_RANGE && r[10] == 0x02)
617 /* Secondary GTF curve kicks in above some break frequency */
619 drm_gtf2_hbreak(struct edid *edid)
622 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
623 return r ? (r[12] * 2) : 0;
627 drm_gtf2_2c(struct edid *edid)
630 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
631 return r ? r[13] : 0;
635 drm_gtf2_m(struct edid *edid)
638 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
639 return r ? (r[15] << 8) + r[14] : 0;
643 drm_gtf2_k(struct edid *edid)
646 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
647 return r ? r[16] : 0;
651 drm_gtf2_2j(struct edid *edid)
654 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
655 return r ? r[17] : 0;
659 * standard_timing_level - get std. timing level(CVT/GTF/DMT)
660 * @edid: EDID block to scan
662 static int standard_timing_level(struct edid *edid)
664 if (edid->revision >= 2) {
665 if (edid->revision >= 4 && (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF))
667 if (drm_gtf2_hbreak(edid))
675 * 0 is reserved. The spec says 0x01 fill for unused timings. Some old
676 * monitors fill with ascii space (0x20) instead.
679 bad_std_timing(u8 a, u8 b)
681 return (a == 0x00 && b == 0x00) ||
682 (a == 0x01 && b == 0x01) ||
683 (a == 0x20 && b == 0x20);
687 * drm_mode_std - convert standard mode info (width, height, refresh) into mode
688 * @t: standard timing params
689 * @timing_level: standard timing level
691 * Take the standard timing params (in this case width, aspect, and refresh)
692 * and convert them into a real mode using CVT/GTF/DMT.
694 static struct drm_display_mode *
695 drm_mode_std(struct drm_connector *connector, struct edid *edid,
696 struct std_timing *t, int revision)
698 struct drm_device *dev = connector->dev;
699 struct drm_display_mode *m, *mode = NULL;
702 unsigned aspect_ratio = (t->vfreq_aspect & EDID_TIMING_ASPECT_MASK)
703 >> EDID_TIMING_ASPECT_SHIFT;
704 unsigned vfreq = (t->vfreq_aspect & EDID_TIMING_VFREQ_MASK)
705 >> EDID_TIMING_VFREQ_SHIFT;
706 int timing_level = standard_timing_level(edid);
708 if (bad_std_timing(t->hsize, t->vfreq_aspect))
711 /* According to the EDID spec, the hdisplay = hsize * 8 + 248 */
712 hsize = t->hsize * 8 + 248;
713 /* vrefresh_rate = vfreq + 60 */
714 vrefresh_rate = vfreq + 60;
715 /* the vdisplay is calculated based on the aspect ratio */
716 if (aspect_ratio == 0) {
720 vsize = (hsize * 10) / 16;
721 } else if (aspect_ratio == 1)
722 vsize = (hsize * 3) / 4;
723 else if (aspect_ratio == 2)
724 vsize = (hsize * 4) / 5;
726 vsize = (hsize * 9) / 16;
728 /* HDTV hack, part 1 */
729 if (vrefresh_rate == 60 &&
730 ((hsize == 1360 && vsize == 765) ||
731 (hsize == 1368 && vsize == 769))) {
737 * If this connector already has a mode for this size and refresh
738 * rate (because it came from detailed or CVT info), use that
739 * instead. This way we don't have to guess at interlace or
742 list_for_each_entry(m, &connector->probed_modes, head)
743 if (m->hdisplay == hsize && m->vdisplay == vsize &&
744 drm_mode_vrefresh(m) == vrefresh_rate)
747 /* HDTV hack, part 2 */
748 if (hsize == 1366 && vsize == 768 && vrefresh_rate == 60) {
749 mode = drm_cvt_mode(dev, 1366, 768, vrefresh_rate, 0, 0,
751 mode->hdisplay = 1366;
752 mode->hsync_start = mode->hsync_start - 1;
753 mode->hsync_end = mode->hsync_end - 1;
757 /* check whether it can be found in default mode table */
758 if (drm_monitor_supports_rb(edid)) {
759 mode = drm_mode_find_dmt(dev, hsize, vsize, vrefresh_rate,
764 mode = drm_mode_find_dmt(dev, hsize, vsize, vrefresh_rate, false);
768 /* okay, generate it */
769 switch (timing_level) {
773 mode = drm_gtf_mode(dev, hsize, vsize, vrefresh_rate, 0, 0);
777 * This is potentially wrong if there's ever a monitor with
778 * more than one ranges section, each claiming a different
779 * secondary GTF curve. Please don't do that.
781 mode = drm_gtf_mode(dev, hsize, vsize, vrefresh_rate, 0, 0);
784 if (drm_mode_hsync(mode) > drm_gtf2_hbreak(edid)) {
785 drm_mode_destroy(dev, mode);
786 mode = drm_gtf_mode_complex(dev, hsize, vsize,
795 mode = drm_cvt_mode(dev, hsize, vsize, vrefresh_rate, 0, 0,
803 * EDID is delightfully ambiguous about how interlaced modes are to be
804 * encoded. Our internal representation is of frame height, but some
805 * HDTV detailed timings are encoded as field height.
807 * The format list here is from CEA, in frame size. Technically we
808 * should be checking refresh rate too. Whatever.
811 drm_mode_do_interlace_quirk(struct drm_display_mode *mode,
812 struct detailed_pixel_timing *pt)
815 static const struct {
817 } cea_interlaced[] = {
827 if (!(pt->misc & DRM_EDID_PT_INTERLACED))
830 for (i = 0; i < ARRAY_SIZE(cea_interlaced); i++) {
831 if ((mode->hdisplay == cea_interlaced[i].w) &&
832 (mode->vdisplay == cea_interlaced[i].h / 2)) {
834 mode->vsync_start *= 2;
835 mode->vsync_end *= 2;
841 mode->flags |= DRM_MODE_FLAG_INTERLACE;
845 * drm_mode_detailed - create a new mode from an EDID detailed timing section
846 * @dev: DRM device (needed to create new mode)
848 * @timing: EDID detailed timing info
849 * @quirks: quirks to apply
851 * An EDID detailed timing block contains enough info for us to create and
852 * return a new struct drm_display_mode.
854 static struct drm_display_mode *drm_mode_detailed(struct drm_device *dev,
856 struct detailed_timing *timing,
859 struct drm_display_mode *mode;
860 struct detailed_pixel_timing *pt = &timing->data.pixel_data;
861 unsigned hactive = (pt->hactive_hblank_hi & 0xf0) << 4 | pt->hactive_lo;
862 unsigned vactive = (pt->vactive_vblank_hi & 0xf0) << 4 | pt->vactive_lo;
863 unsigned hblank = (pt->hactive_hblank_hi & 0xf) << 8 | pt->hblank_lo;
864 unsigned vblank = (pt->vactive_vblank_hi & 0xf) << 8 | pt->vblank_lo;
865 unsigned hsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc0) << 2 | pt->hsync_offset_lo;
866 unsigned hsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x30) << 4 | pt->hsync_pulse_width_lo;
867 unsigned vsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc) >> 2 | pt->vsync_offset_pulse_width_lo >> 4;
868 unsigned vsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x3) << 4 | (pt->vsync_offset_pulse_width_lo & 0xf);
870 /* ignore tiny modes */
871 if (hactive < 64 || vactive < 64)
874 if (pt->misc & DRM_EDID_PT_STEREO) {
875 printk(KERN_WARNING "stereo mode not supported\n");
878 if (!(pt->misc & DRM_EDID_PT_SEPARATE_SYNC)) {
879 printk(KERN_WARNING "composite sync not supported\n");
882 /* it is incorrect if hsync/vsync width is zero */
883 if (!hsync_pulse_width || !vsync_pulse_width) {
884 DRM_DEBUG_KMS("Incorrect Detailed timing. "
885 "Wrong Hsync/Vsync pulse width\n");
888 mode = drm_mode_create(dev);
892 mode->type = DRM_MODE_TYPE_DRIVER;
894 if (quirks & EDID_QUIRK_135_CLOCK_TOO_HIGH)
895 timing->pixel_clock = cpu_to_le16(1088);
897 mode->clock = le16_to_cpu(timing->pixel_clock) * 10;
899 mode->hdisplay = hactive;
900 mode->hsync_start = mode->hdisplay + hsync_offset;
901 mode->hsync_end = mode->hsync_start + hsync_pulse_width;
902 mode->htotal = mode->hdisplay + hblank;
904 mode->vdisplay = vactive;
905 mode->vsync_start = mode->vdisplay + vsync_offset;
906 mode->vsync_end = mode->vsync_start + vsync_pulse_width;
907 mode->vtotal = mode->vdisplay + vblank;
909 /* Some EDIDs have bogus h/vtotal values */
910 if (mode->hsync_end > mode->htotal)
911 mode->htotal = mode->hsync_end + 1;
912 if (mode->vsync_end > mode->vtotal)
913 mode->vtotal = mode->vsync_end + 1;
915 drm_mode_do_interlace_quirk(mode, pt);
917 drm_mode_set_name(mode);
919 if (quirks & EDID_QUIRK_DETAILED_SYNC_PP) {
920 pt->misc |= DRM_EDID_PT_HSYNC_POSITIVE | DRM_EDID_PT_VSYNC_POSITIVE;
923 mode->flags |= (pt->misc & DRM_EDID_PT_HSYNC_POSITIVE) ?
924 DRM_MODE_FLAG_PHSYNC : DRM_MODE_FLAG_NHSYNC;
925 mode->flags |= (pt->misc & DRM_EDID_PT_VSYNC_POSITIVE) ?
926 DRM_MODE_FLAG_PVSYNC : DRM_MODE_FLAG_NVSYNC;
928 mode->width_mm = pt->width_mm_lo | (pt->width_height_mm_hi & 0xf0) << 4;
929 mode->height_mm = pt->height_mm_lo | (pt->width_height_mm_hi & 0xf) << 8;
931 if (quirks & EDID_QUIRK_DETAILED_IN_CM) {
932 mode->width_mm *= 10;
933 mode->height_mm *= 10;
936 if (quirks & EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE) {
937 mode->width_mm = edid->width_cm * 10;
938 mode->height_mm = edid->height_cm * 10;
945 mode_in_hsync_range(const struct drm_display_mode *mode,
946 struct edid *edid, u8 *t)
948 int hsync, hmin, hmax;
951 if (edid->revision >= 4)
952 hmin += ((t[4] & 0x04) ? 255 : 0);
954 if (edid->revision >= 4)
955 hmax += ((t[4] & 0x08) ? 255 : 0);
956 hsync = drm_mode_hsync(mode);
958 return (hsync <= hmax && hsync >= hmin);
962 mode_in_vsync_range(const struct drm_display_mode *mode,
963 struct edid *edid, u8 *t)
965 int vsync, vmin, vmax;
968 if (edid->revision >= 4)
969 vmin += ((t[4] & 0x01) ? 255 : 0);
971 if (edid->revision >= 4)
972 vmax += ((t[4] & 0x02) ? 255 : 0);
973 vsync = drm_mode_vrefresh(mode);
975 return (vsync <= vmax && vsync >= vmin);
979 range_pixel_clock(struct edid *edid, u8 *t)
982 if (t[9] == 0 || t[9] == 255)
985 /* 1.4 with CVT support gives us real precision, yay */
986 if (edid->revision >= 4 && t[10] == 0x04)
987 return (t[9] * 10000) - ((t[12] >> 2) * 250);
989 /* 1.3 is pathetic, so fuzz up a bit */
990 return t[9] * 10000 + 5001;
994 mode_in_range(const struct drm_display_mode *mode, struct edid *edid,
995 struct detailed_timing *timing)
998 u8 *t = (u8 *)timing;
1000 if (!mode_in_hsync_range(mode, edid, t))
1003 if (!mode_in_vsync_range(mode, edid, t))
1006 if ((max_clock = range_pixel_clock(edid, t)))
1007 if (mode->clock > max_clock)
1010 /* 1.4 max horizontal check */
1011 if (edid->revision >= 4 && t[10] == 0x04)
1012 if (t[13] && mode->hdisplay > 8 * (t[13] + (256 * (t[12]&0x3))))
1015 if (mode_is_rb(mode) && !drm_monitor_supports_rb(edid))
1022 drm_dmt_modes_for_range(struct drm_connector *connector, struct edid *edid,
1023 struct detailed_timing *timing)
1026 struct drm_display_mode *newmode;
1027 struct drm_device *dev = connector->dev;
1029 for (i = 0; i < drm_num_dmt_modes; i++) {
1030 if (mode_in_range(drm_dmt_modes + i, edid, timing)) {
1031 newmode = drm_mode_duplicate(dev, &drm_dmt_modes[i]);
1033 drm_mode_probed_add(connector, newmode);
1043 drm_gtf_modes_for_range(struct drm_connector *connector, struct edid *edid,
1044 struct detailed_timing *timing)
1047 struct drm_display_mode *newmode;
1048 struct drm_device *dev = connector->dev;
1050 for (i = 0; i < num_extra_modes; i++) {
1051 const struct minimode *m = &extra_modes[i];
1052 newmode = drm_gtf_mode(dev, m->w, m->h, m->r, 0, 0);
1056 if (!mode_in_range(newmode, edid, timing)) {
1057 drm_mode_destroy(dev, newmode);
1061 drm_mode_probed_add(connector, newmode);
1069 drm_cvt_modes_for_range(struct drm_connector *connector, struct edid *edid,
1070 struct detailed_timing *timing)
1073 struct drm_display_mode *newmode;
1074 struct drm_device *dev = connector->dev;
1075 bool rb = drm_monitor_supports_rb(edid);
1077 for (i = 0; i < num_extra_modes; i++) {
1078 const struct minimode *m = &extra_modes[i];
1079 newmode = drm_cvt_mode(dev, m->w, m->h, m->r, rb, 0, 0);
1083 if (!mode_in_range(newmode, edid, timing)) {
1084 drm_mode_destroy(dev, newmode);
1088 drm_mode_probed_add(connector, newmode);
1096 do_inferred_modes(struct detailed_timing *timing, void *c)
1098 struct detailed_mode_closure *closure = c;
1099 struct detailed_non_pixel *data = &timing->data.other_data;
1100 struct detailed_data_monitor_range *range = &data->data.range;
1102 if (data->type != EDID_DETAIL_MONITOR_RANGE)
1105 closure->modes += drm_dmt_modes_for_range(closure->connector,
1109 if (!version_greater(closure->edid, 1, 1))
1110 return; /* GTF not defined yet */
1112 switch (range->flags) {
1113 case 0x02: /* secondary gtf, XXX could do more */
1114 case 0x00: /* default gtf */
1115 closure->modes += drm_gtf_modes_for_range(closure->connector,
1119 case 0x04: /* cvt, only in 1.4+ */
1120 if (!version_greater(closure->edid, 1, 3))
1123 closure->modes += drm_cvt_modes_for_range(closure->connector,
1127 case 0x01: /* just the ranges, no formula */
1134 add_inferred_modes(struct drm_connector *connector, struct edid *edid)
1136 struct detailed_mode_closure closure = {
1137 connector, edid, 0, 0, 0
1140 if (version_greater(edid, 1, 0))
1141 drm_for_each_detailed_block((u8 *)edid, do_inferred_modes,
1144 return closure.modes;
1148 drm_est3_modes(struct drm_connector *connector, struct detailed_timing *timing)
1150 int i, j, m, modes = 0;
1151 struct drm_display_mode *mode;
1152 u8 *est = ((u8 *)timing) + 5;
1154 for (i = 0; i < 6; i++) {
1155 for (j = 7; j > 0; j--) {
1156 m = (i * 8) + (7 - j);
1157 if (m >= ARRAY_SIZE(est3_modes))
1159 if (est[i] & (1 << j)) {
1160 mode = drm_mode_find_dmt(connector->dev,
1166 drm_mode_probed_add(connector, mode);
1177 do_established_modes(struct detailed_timing *timing, void *c)
1179 struct detailed_mode_closure *closure = c;
1180 struct detailed_non_pixel *data = &timing->data.other_data;
1182 if (data->type == EDID_DETAIL_EST_TIMINGS)
1183 closure->modes += drm_est3_modes(closure->connector, timing);
1187 * add_established_modes - get est. modes from EDID and add them
1188 * @edid: EDID block to scan
1190 * Each EDID block contains a bitmap of the supported "established modes" list
1191 * (defined above). Tease them out and add them to the global modes list.
1194 add_established_modes(struct drm_connector *connector, struct edid *edid)
1196 struct drm_device *dev = connector->dev;
1197 unsigned long est_bits = edid->established_timings.t1 |
1198 (edid->established_timings.t2 << 8) |
1199 ((edid->established_timings.mfg_rsvd & 0x80) << 9);
1201 struct detailed_mode_closure closure = {
1202 connector, edid, 0, 0, 0
1205 for (i = 0; i <= EDID_EST_TIMINGS; i++) {
1206 if (est_bits & (1<<i)) {
1207 struct drm_display_mode *newmode;
1208 newmode = drm_mode_duplicate(dev, &edid_est_modes[i]);
1210 drm_mode_probed_add(connector, newmode);
1216 if (version_greater(edid, 1, 0))
1217 drm_for_each_detailed_block((u8 *)edid,
1218 do_established_modes, &closure);
1220 return modes + closure.modes;
1224 do_standard_modes(struct detailed_timing *timing, void *c)
1226 struct detailed_mode_closure *closure = c;
1227 struct detailed_non_pixel *data = &timing->data.other_data;
1228 struct drm_connector *connector = closure->connector;
1229 struct edid *edid = closure->edid;
1231 if (data->type == EDID_DETAIL_STD_MODES) {
1233 for (i = 0; i < 6; i++) {
1234 struct std_timing *std;
1235 struct drm_display_mode *newmode;
1237 std = &data->data.timings[i];
1238 newmode = drm_mode_std(connector, edid, std,
1241 drm_mode_probed_add(connector, newmode);
1249 * add_standard_modes - get std. modes from EDID and add them
1250 * @edid: EDID block to scan
1252 * Standard modes can be calculated using the appropriate standard (DMT,
1253 * GTF or CVT. Grab them from @edid and add them to the list.
1256 add_standard_modes(struct drm_connector *connector, struct edid *edid)
1259 struct detailed_mode_closure closure = {
1260 connector, edid, 0, 0, 0
1263 for (i = 0; i < EDID_STD_TIMINGS; i++) {
1264 struct drm_display_mode *newmode;
1266 newmode = drm_mode_std(connector, edid,
1267 &edid->standard_timings[i],
1270 drm_mode_probed_add(connector, newmode);
1275 if (version_greater(edid, 1, 0))
1276 drm_for_each_detailed_block((u8 *)edid, do_standard_modes,
1279 /* XXX should also look for standard codes in VTB blocks */
1281 return modes + closure.modes;
1284 static int drm_cvt_modes(struct drm_connector *connector,
1285 struct detailed_timing *timing)
1287 int i, j, modes = 0;
1288 struct drm_display_mode *newmode;
1289 struct drm_device *dev = connector->dev;
1290 struct cvt_timing *cvt;
1291 const int rates[] = { 60, 85, 75, 60, 50 };
1292 const u8 empty[3] = { 0, 0, 0 };
1294 for (i = 0; i < 4; i++) {
1295 int uninitialized_var(width), height;
1296 cvt = &(timing->data.other_data.data.cvt[i]);
1298 if (!memcmp(cvt->code, empty, 3))
1301 height = (cvt->code[0] + ((cvt->code[1] & 0xf0) << 4) + 1) * 2;
1302 switch (cvt->code[1] & 0x0c) {
1304 width = height * 4 / 3;
1307 width = height * 16 / 9;
1310 width = height * 16 / 10;
1313 width = height * 15 / 9;
1317 for (j = 1; j < 5; j++) {
1318 if (cvt->code[2] & (1 << j)) {
1319 newmode = drm_cvt_mode(dev, width, height,
1323 drm_mode_probed_add(connector, newmode);
1334 do_cvt_mode(struct detailed_timing *timing, void *c)
1336 struct detailed_mode_closure *closure = c;
1337 struct detailed_non_pixel *data = &timing->data.other_data;
1339 if (data->type == EDID_DETAIL_CVT_3BYTE)
1340 closure->modes += drm_cvt_modes(closure->connector, timing);
1344 add_cvt_modes(struct drm_connector *connector, struct edid *edid)
1346 struct detailed_mode_closure closure = {
1347 connector, edid, 0, 0, 0
1350 if (version_greater(edid, 1, 2))
1351 drm_for_each_detailed_block((u8 *)edid, do_cvt_mode, &closure);
1353 /* XXX should also look for CVT codes in VTB blocks */
1355 return closure.modes;
1359 do_detailed_mode(struct detailed_timing *timing, void *c)
1361 struct detailed_mode_closure *closure = c;
1362 struct drm_display_mode *newmode;
1364 if (timing->pixel_clock) {
1365 newmode = drm_mode_detailed(closure->connector->dev,
1366 closure->edid, timing,
1371 if (closure->preferred)
1372 newmode->type |= DRM_MODE_TYPE_PREFERRED;
1374 drm_mode_probed_add(closure->connector, newmode);
1376 closure->preferred = 0;
1381 * add_detailed_modes - Add modes from detailed timings
1382 * @connector: attached connector
1383 * @edid: EDID block to scan
1384 * @quirks: quirks to apply
1387 add_detailed_modes(struct drm_connector *connector, struct edid *edid,
1390 struct detailed_mode_closure closure = {
1398 if (closure.preferred && !version_greater(edid, 1, 3))
1400 (edid->features & DRM_EDID_FEATURE_PREFERRED_TIMING);
1402 drm_for_each_detailed_block((u8 *)edid, do_detailed_mode, &closure);
1404 return closure.modes;
1407 #define HDMI_IDENTIFIER 0x000C03
1408 #define AUDIO_BLOCK 0x01
1409 #define VIDEO_BLOCK 0x02
1410 #define VENDOR_BLOCK 0x03
1411 #define SPEAKER_BLOCK 0x04
1412 #define EDID_BASIC_AUDIO (1 << 6)
1413 #define EDID_CEA_YCRCB444 (1 << 5)
1414 #define EDID_CEA_YCRCB422 (1 << 4)
1417 * Search EDID for CEA extension block.
1419 u8 *drm_find_cea_extension(struct edid *edid)
1421 u8 *edid_ext = NULL;
1424 /* No EDID or EDID extensions */
1425 if (edid == NULL || edid->extensions == 0)
1428 /* Find CEA extension */
1429 for (i = 0; i < edid->extensions; i++) {
1430 edid_ext = (u8 *)edid + EDID_LENGTH * (i + 1);
1431 if (edid_ext[0] == CEA_EXT)
1435 if (i == edid->extensions)
1440 EXPORT_SYMBOL(drm_find_cea_extension);
1443 do_cea_modes (struct drm_connector *connector, u8 *db, u8 len)
1445 struct drm_device *dev = connector->dev;
1446 u8 * mode, cea_mode;
1449 for (mode = db; mode < db + len; mode++) {
1450 cea_mode = (*mode & 127) - 1; /* CEA modes are numbered 1..127 */
1451 if (cea_mode < drm_num_cea_modes) {
1452 struct drm_display_mode *newmode;
1453 newmode = drm_mode_duplicate(dev,
1454 &edid_cea_modes[cea_mode]);
1456 drm_mode_probed_add(connector, newmode);
1466 add_cea_modes(struct drm_connector *connector, struct edid *edid)
1468 u8 * cea = drm_find_cea_extension(edid);
1472 if (cea && cea[1] >= 3) {
1473 for (db = cea + 4; db < cea + cea[2]; db += dbl + 1) {
1475 if (((db[0] & 0xe0) >> 5) == VIDEO_BLOCK)
1476 modes += do_cea_modes (connector, db+1, dbl);
1484 parse_hdmi_vsdb(struct drm_connector *connector, uint8_t *db)
1486 connector->eld[5] |= (db[6] >> 7) << 1; /* Supports_AI */
1488 connector->dvi_dual = db[6] & 1;
1489 connector->max_tmds_clock = db[7] * 5;
1491 connector->latency_present[0] = db[8] >> 7;
1492 connector->latency_present[1] = (db[8] >> 6) & 1;
1493 connector->video_latency[0] = db[9];
1494 connector->audio_latency[0] = db[10];
1495 connector->video_latency[1] = db[11];
1496 connector->audio_latency[1] = db[12];
1498 DRM_LOG_KMS("HDMI: DVI dual %d, "
1499 "max TMDS clock %d, "
1500 "latency present %d %d, "
1501 "video latency %d %d, "
1502 "audio latency %d %d\n",
1503 connector->dvi_dual,
1504 connector->max_tmds_clock,
1505 (int) connector->latency_present[0],
1506 (int) connector->latency_present[1],
1507 connector->video_latency[0],
1508 connector->video_latency[1],
1509 connector->audio_latency[0],
1510 connector->audio_latency[1]);
1514 monitor_name(struct detailed_timing *t, void *data)
1516 if (t->data.other_data.type == EDID_DETAIL_MONITOR_NAME)
1517 *(u8 **)data = t->data.other_data.data.str.str;
1521 * drm_edid_to_eld - build ELD from EDID
1522 * @connector: connector corresponding to the HDMI/DP sink
1523 * @edid: EDID to parse
1525 * Fill the ELD (EDID-Like Data) buffer for passing to the audio driver.
1526 * Some ELD fields are left to the graphics driver caller:
1531 void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid)
1533 uint8_t *eld = connector->eld;
1541 memset(eld, 0, sizeof(connector->eld));
1543 cea = drm_find_cea_extension(edid);
1545 DRM_DEBUG_KMS("ELD: no CEA Extension found\n");
1550 drm_for_each_detailed_block((u8 *)edid, monitor_name, &name);
1551 for (mnl = 0; name && mnl < 13; mnl++) {
1552 if (name[mnl] == 0x0a)
1554 eld[20 + mnl] = name[mnl];
1556 eld[4] = (cea[1] << 5) | mnl;
1557 DRM_DEBUG_KMS("ELD monitor %s\n", eld + 20);
1559 eld[0] = 2 << 3; /* ELD version: 2 */
1561 eld[16] = edid->mfg_id[0];
1562 eld[17] = edid->mfg_id[1];
1563 eld[18] = edid->prod_code[0];
1564 eld[19] = edid->prod_code[1];
1567 for (db = cea + 4; db < cea + cea[2]; db += dbl + 1) {
1570 switch ((db[0] & 0xe0) >> 5) {
1572 /* Audio Data Block, contains SADs */
1573 sad_count = dbl / 3;
1574 memcpy(eld + 20 + mnl, &db[1], dbl);
1577 /* Speaker Allocation Data Block */
1581 /* HDMI Vendor-Specific Data Block */
1582 if (db[1] == 0x03 && db[2] == 0x0c && db[3] == 0)
1583 parse_hdmi_vsdb(connector, db);
1589 eld[5] |= sad_count << 4;
1590 eld[2] = (20 + mnl + sad_count * 3 + 3) / 4;
1592 DRM_DEBUG_KMS("ELD size %d, SAD count %d\n", (int)eld[2], sad_count);
1594 EXPORT_SYMBOL(drm_edid_to_eld);
1597 * drm_av_sync_delay - HDMI/DP sink audio-video sync delay in millisecond
1598 * @connector: connector associated with the HDMI/DP sink
1599 * @mode: the display mode
1601 int drm_av_sync_delay(struct drm_connector *connector,
1602 struct drm_display_mode *mode)
1604 int i = !!(mode->flags & DRM_MODE_FLAG_INTERLACE);
1607 if (!connector->latency_present[0])
1609 if (!connector->latency_present[1])
1612 a = connector->audio_latency[i];
1613 v = connector->video_latency[i];
1616 * HDMI/DP sink doesn't support audio or video?
1618 if (a == 255 || v == 255)
1622 * Convert raw EDID values to millisecond.
1623 * Treat unknown latency as 0ms.
1626 a = min(2 * (a - 1), 500);
1628 v = min(2 * (v - 1), 500);
1630 return max(v - a, 0);
1632 EXPORT_SYMBOL(drm_av_sync_delay);
1635 * drm_select_eld - select one ELD from multiple HDMI/DP sinks
1636 * @encoder: the encoder just changed display mode
1637 * @mode: the adjusted display mode
1639 * It's possible for one encoder to be associated with multiple HDMI/DP sinks.
1640 * The policy is now hard coded to simply use the first HDMI/DP sink's ELD.
1642 struct drm_connector *drm_select_eld(struct drm_encoder *encoder,
1643 struct drm_display_mode *mode)
1645 struct drm_connector *connector;
1646 struct drm_device *dev = encoder->dev;
1648 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
1649 if (connector->encoder == encoder && connector->eld[0])
1654 EXPORT_SYMBOL(drm_select_eld);
1657 * drm_detect_hdmi_monitor - detect whether monitor is hdmi.
1658 * @edid: monitor EDID information
1660 * Parse the CEA extension according to CEA-861-B.
1661 * Return true if HDMI, false if not or unknown.
1663 bool drm_detect_hdmi_monitor(struct edid *edid)
1667 int start_offset, end_offset;
1668 bool is_hdmi = false;
1670 edid_ext = drm_find_cea_extension(edid);
1674 /* Data block offset in CEA extension block */
1676 end_offset = edid_ext[2];
1679 * Because HDMI identifier is in Vendor Specific Block,
1680 * search it from all data blocks of CEA extension.
1682 for (i = start_offset; i < end_offset;
1683 /* Increased by data block len */
1684 i += ((edid_ext[i] & 0x1f) + 1)) {
1685 /* Find vendor specific block */
1686 if ((edid_ext[i] >> 5) == VENDOR_BLOCK) {
1687 hdmi_id = edid_ext[i + 1] | (edid_ext[i + 2] << 8) |
1688 edid_ext[i + 3] << 16;
1689 /* Find HDMI identifier */
1690 if (hdmi_id == HDMI_IDENTIFIER)
1699 EXPORT_SYMBOL(drm_detect_hdmi_monitor);
1702 * drm_detect_monitor_audio - check monitor audio capability
1704 * Monitor should have CEA extension block.
1705 * If monitor has 'basic audio', but no CEA audio blocks, it's 'basic
1706 * audio' only. If there is any audio extension block and supported
1707 * audio format, assume at least 'basic audio' support, even if 'basic
1708 * audio' is not defined in EDID.
1711 bool drm_detect_monitor_audio(struct edid *edid)
1715 bool has_audio = false;
1716 int start_offset, end_offset;
1718 edid_ext = drm_find_cea_extension(edid);
1722 has_audio = ((edid_ext[3] & EDID_BASIC_AUDIO) != 0);
1725 DRM_DEBUG_KMS("Monitor has basic audio support\n");
1729 /* Data block offset in CEA extension block */
1731 end_offset = edid_ext[2];
1733 for (i = start_offset; i < end_offset;
1734 i += ((edid_ext[i] & 0x1f) + 1)) {
1735 if ((edid_ext[i] >> 5) == AUDIO_BLOCK) {
1737 for (j = 1; j < (edid_ext[i] & 0x1f); j += 3)
1738 DRM_DEBUG_KMS("CEA audio format %d\n",
1739 (edid_ext[i + j] >> 3) & 0xf);
1746 EXPORT_SYMBOL(drm_detect_monitor_audio);
1749 * drm_add_display_info - pull display info out if present
1751 * @info: display info (attached to connector)
1753 * Grab any available display info and stuff it into the drm_display_info
1754 * structure that's part of the connector. Useful for tracking bpp and
1757 static void drm_add_display_info(struct edid *edid,
1758 struct drm_display_info *info)
1762 info->width_mm = edid->width_cm * 10;
1763 info->height_mm = edid->height_cm * 10;
1765 /* driver figures it out in this case */
1767 info->color_formats = 0;
1769 if (edid->revision < 3)
1772 if (!(edid->input & DRM_EDID_INPUT_DIGITAL))
1775 /* Get data from CEA blocks if present */
1776 edid_ext = drm_find_cea_extension(edid);
1778 info->cea_rev = edid_ext[1];
1780 /* The existence of a CEA block should imply RGB support */
1781 info->color_formats = DRM_COLOR_FORMAT_RGB444;
1782 if (edid_ext[3] & EDID_CEA_YCRCB444)
1783 info->color_formats |= DRM_COLOR_FORMAT_YCRCB444;
1784 if (edid_ext[3] & EDID_CEA_YCRCB422)
1785 info->color_formats |= DRM_COLOR_FORMAT_YCRCB422;
1788 /* Only defined for 1.4 with digital displays */
1789 if (edid->revision < 4)
1792 switch (edid->input & DRM_EDID_DIGITAL_DEPTH_MASK) {
1793 case DRM_EDID_DIGITAL_DEPTH_6:
1796 case DRM_EDID_DIGITAL_DEPTH_8:
1799 case DRM_EDID_DIGITAL_DEPTH_10:
1802 case DRM_EDID_DIGITAL_DEPTH_12:
1805 case DRM_EDID_DIGITAL_DEPTH_14:
1808 case DRM_EDID_DIGITAL_DEPTH_16:
1811 case DRM_EDID_DIGITAL_DEPTH_UNDEF:
1817 info->color_formats |= DRM_COLOR_FORMAT_RGB444;
1818 if (edid->features & DRM_EDID_FEATURE_RGB_YCRCB444)
1819 info->color_formats |= DRM_COLOR_FORMAT_YCRCB444;
1820 if (edid->features & DRM_EDID_FEATURE_RGB_YCRCB422)
1821 info->color_formats |= DRM_COLOR_FORMAT_YCRCB422;
1825 * drm_add_edid_modes - add modes from EDID data, if available
1826 * @connector: connector we're probing
1829 * Add the specified modes to the connector's mode list.
1831 * Return number of modes added or 0 if we couldn't find any.
1833 int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid)
1841 if (!drm_edid_is_valid(edid)) {
1842 dev_warn(connector->dev->dev, "%s: EDID invalid.\n",
1843 drm_get_connector_name(connector));
1847 quirks = edid_get_quirks(edid);
1850 * EDID spec says modes should be preferred in this order:
1851 * - preferred detailed mode
1852 * - other detailed modes from base block
1853 * - detailed modes from extension blocks
1854 * - CVT 3-byte code modes
1855 * - standard timing codes
1856 * - established timing codes
1857 * - modes inferred from GTF or CVT range information
1859 * We get this pretty much right.
1861 * XXX order for additional mode types in extension blocks?
1863 num_modes += add_detailed_modes(connector, edid, quirks);
1864 num_modes += add_cvt_modes(connector, edid);
1865 num_modes += add_standard_modes(connector, edid);
1866 num_modes += add_established_modes(connector, edid);
1867 num_modes += add_inferred_modes(connector, edid);
1868 num_modes += add_cea_modes(connector, edid);
1870 if (quirks & (EDID_QUIRK_PREFER_LARGE_60 | EDID_QUIRK_PREFER_LARGE_75))
1871 edid_fixup_preferred(connector, quirks);
1873 drm_add_display_info(edid, &connector->display_info);
1877 EXPORT_SYMBOL(drm_add_edid_modes);
1880 * drm_add_modes_noedid - add modes for the connectors without EDID
1881 * @connector: connector we're probing
1882 * @hdisplay: the horizontal display limit
1883 * @vdisplay: the vertical display limit
1885 * Add the specified modes to the connector's mode list. Only when the
1886 * hdisplay/vdisplay is not beyond the given limit, it will be added.
1888 * Return number of modes added or 0 if we couldn't find any.
1890 int drm_add_modes_noedid(struct drm_connector *connector,
1891 int hdisplay, int vdisplay)
1893 int i, count, num_modes = 0;
1894 struct drm_display_mode *mode;
1895 struct drm_device *dev = connector->dev;
1897 count = sizeof(drm_dmt_modes) / sizeof(struct drm_display_mode);
1903 for (i = 0; i < count; i++) {
1904 const struct drm_display_mode *ptr = &drm_dmt_modes[i];
1905 if (hdisplay && vdisplay) {
1907 * Only when two are valid, they will be used to check
1908 * whether the mode should be added to the mode list of
1911 if (ptr->hdisplay > hdisplay ||
1912 ptr->vdisplay > vdisplay)
1915 if (drm_mode_vrefresh(ptr) > 61)
1917 mode = drm_mode_duplicate(dev, ptr);
1919 drm_mode_probed_add(connector, mode);
1925 EXPORT_SYMBOL(drm_add_modes_noedid);