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.
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
34 #include <dev/drm2/drmP.h>
35 #include <dev/drm2/drm_edid.h>
36 #include <dev/drm2/drm_edid_modes.h>
37 #include <dev/iicbus/iic.h>
38 #include <dev/iicbus/iiconf.h>
39 #include "iicbus_if.h"
41 #define version_greater(edid, maj, min) \
42 (((edid)->version > (maj)) || \
43 ((edid)->version == (maj) && (edid)->revision > (min)))
45 #define EDID_EST_TIMINGS 16
46 #define EDID_STD_TIMINGS 8
47 #define EDID_DETAILED_TIMINGS 4
50 * EDID blocks out in the wild have a variety of bugs, try to collect
51 * them here (note that userspace may work around broken monitors first,
52 * but fixes should make their way here so that the kernel "just works"
53 * on as many displays as possible).
56 /* First detailed mode wrong, use largest 60Hz mode */
57 #define EDID_QUIRK_PREFER_LARGE_60 (1 << 0)
58 /* Reported 135MHz pixel clock is too high, needs adjustment */
59 #define EDID_QUIRK_135_CLOCK_TOO_HIGH (1 << 1)
60 /* Prefer the largest mode at 75 Hz */
61 #define EDID_QUIRK_PREFER_LARGE_75 (1 << 2)
62 /* Detail timing is in cm not mm */
63 #define EDID_QUIRK_DETAILED_IN_CM (1 << 3)
64 /* Detailed timing descriptors have bogus size values, so just take the
65 * maximum size and use that.
67 #define EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE (1 << 4)
68 /* Monitor forgot to set the first detailed is preferred bit. */
69 #define EDID_QUIRK_FIRST_DETAILED_PREFERRED (1 << 5)
70 /* use +hsync +vsync for detailed mode */
71 #define EDID_QUIRK_DETAILED_SYNC_PP (1 << 6)
73 struct detailed_mode_closure {
74 struct drm_connector *connector;
86 static struct edid_quirk {
90 } edid_quirk_list[] = {
92 { "ACR", 44358, EDID_QUIRK_PREFER_LARGE_60 },
94 { "API", 0x7602, EDID_QUIRK_PREFER_LARGE_60 },
96 { "ACR", 2423, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
98 /* Belinea 10 15 55 */
99 { "MAX", 1516, EDID_QUIRK_PREFER_LARGE_60 },
100 { "MAX", 0x77e, EDID_QUIRK_PREFER_LARGE_60 },
102 /* Envision Peripherals, Inc. EN-7100e */
103 { "EPI", 59264, EDID_QUIRK_135_CLOCK_TOO_HIGH },
104 /* Envision EN2028 */
105 { "EPI", 8232, EDID_QUIRK_PREFER_LARGE_60 },
107 /* Funai Electronics PM36B */
108 { "FCM", 13600, EDID_QUIRK_PREFER_LARGE_75 |
109 EDID_QUIRK_DETAILED_IN_CM },
111 /* LG Philips LCD LP154W01-A5 */
112 { "LPL", 0, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE },
113 { "LPL", 0x2a00, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE },
115 /* Philips 107p5 CRT */
116 { "PHL", 57364, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
119 { "PTS", 765, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
121 /* Samsung SyncMaster 205BW. Note: irony */
122 { "SAM", 541, EDID_QUIRK_DETAILED_SYNC_PP },
123 /* Samsung SyncMaster 22[5-6]BW */
124 { "SAM", 596, EDID_QUIRK_PREFER_LARGE_60 },
125 { "SAM", 638, EDID_QUIRK_PREFER_LARGE_60 },
128 /*** DDC fetch and block validation ***/
130 static const u8 edid_header[] = {
131 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00
135 * Sanity check the header of the base EDID block. Return 8 if the header
136 * is perfect, down to 0 if it's totally wrong.
138 int drm_edid_header_is_valid(const u8 *raw_edid)
142 for (i = 0; i < sizeof(edid_header); i++)
143 if (raw_edid[i] == edid_header[i])
150 * Sanity check the EDID block (base or extension). Return 0 if the block
151 * doesn't check out, or 1 if it's valid.
154 drm_edid_block_valid(u8 *raw_edid, int block)
158 struct edid *edid = (struct edid *)raw_edid;
161 int score = drm_edid_header_is_valid(raw_edid);
163 else if (score >= 6) {
164 DRM_DEBUG("Fixing EDID header, your hardware may be failing\n");
165 memcpy(raw_edid, edid_header, sizeof(edid_header));
171 for (i = 0; i < EDID_LENGTH; i++)
174 DRM_DEBUG_KMS("EDID checksum is invalid, remainder is %d\n", csum);
176 /* allow CEA to slide through, switches mangle this */
177 if (raw_edid[0] != 0x02)
181 /* per-block-type checks */
182 switch (raw_edid[0]) {
184 if (edid->version != 1) {
185 DRM_ERROR("EDID has major version %d, instead of 1\n", edid->version);
189 if (edid->revision > 4)
190 DRM_DEBUG("EDID minor > 4, assuming backward compatibility\n");
201 DRM_DEBUG_KMS("Raw EDID:\n");
202 if ((drm_debug_flag & DRM_DEBUGBITS_KMS) != 0) {
203 for (i = 0; i < EDID_LENGTH; ) {
204 printf("%02x", raw_edid[i]);
206 if (i % 16 == 0 || i == EDID_LENGTH)
219 * drm_edid_is_valid - sanity check EDID data
222 * Sanity-check an entire EDID record (including extensions)
224 bool drm_edid_is_valid(struct edid *edid)
227 u8 *raw = (u8 *)edid;
232 for (i = 0; i <= edid->extensions; i++)
233 if (!drm_edid_block_valid(raw + i * EDID_LENGTH, i))
239 #define DDC_ADDR 0x50
240 #define DDC_SEGMENT_ADDR 0x30
242 * Get EDID information via I2C.
244 * \param adapter : i2c device adaptor
245 * \param buf : EDID data buffer to be filled
246 * \param len : EDID data buffer length
247 * \return 0 on success or -1 on failure.
249 * Try to fetch EDID information by calling i2c driver function.
252 drm_do_probe_ddc_edid(device_t adapter, unsigned char *buf,
255 unsigned char start = block * EDID_LENGTH;
256 unsigned char segment = block >> 1;
257 unsigned char xfers = segment ? 3 : 2;
258 int ret, retries = 5;
260 /* The core i2c driver will automatically retry the transfer if the
261 * adapter reports EAGAIN. However, we find that bit-banging transfers
262 * are susceptible to errors under a heavily loaded machine and
263 * generate spurious NAKs and timeouts. Retrying the transfer
264 * of the individual block a few times seems to overcome this.
267 struct iic_msg msgs[] = {
269 .slave = DDC_SEGMENT_ADDR << 1,
274 .slave = DDC_ADDR << 1,
279 .slave = DDC_ADDR << 1,
287 * Avoid sending the segment addr to not upset non-compliant ddc
290 ret = iicbus_transfer(adapter, &msgs[3 - xfers], xfers);
293 DRM_DEBUG_KMS("iicbus_transfer countdown %d error %d\n",
295 } while (ret != 0 && --retries);
297 return (ret == 0 ? 0 : -1);
300 static bool drm_edid_is_zero(u8 *in_edid, int length)
303 u32 *raw_edid = (u32 *)in_edid;
305 for (i = 0; i < length / 4; i++)
306 if (*(raw_edid + i) != 0)
312 drm_do_get_edid(struct drm_connector *connector, device_t adapter)
314 int i, j = 0, valid_extensions = 0;
317 block = malloc(EDID_LENGTH, DRM_MEM_KMS, M_WAITOK | M_ZERO);
319 /* base block fetch */
320 for (i = 0; i < 4; i++) {
321 if (drm_do_probe_ddc_edid(adapter, block, 0, EDID_LENGTH))
323 if (drm_edid_block_valid(block, 0))
325 if (i == 0 && drm_edid_is_zero(block, EDID_LENGTH)) {
326 connector->null_edid_counter++;
333 /* if there's no extensions, we're done */
334 if (block[0x7e] == 0)
337 new = reallocf(block, (block[0x7e] + 1) * EDID_LENGTH, DRM_MEM_KMS,
341 for (j = 1; j <= block[0x7e]; j++) {
342 for (i = 0; i < 4; i++) {
343 if (drm_do_probe_ddc_edid(adapter,
344 block + (valid_extensions + 1) * EDID_LENGTH,
347 if (drm_edid_block_valid(block + (valid_extensions + 1) * EDID_LENGTH, j)) {
353 DRM_DEBUG_KMS("%s: Ignoring invalid EDID block %d.\n",
354 drm_get_connector_name(connector), j);
357 if (valid_extensions != block[0x7e]) {
358 block[EDID_LENGTH-1] += block[0x7e] - valid_extensions;
359 block[0x7e] = valid_extensions;
360 new = reallocf(block, (valid_extensions + 1) * EDID_LENGTH,
361 DRM_MEM_KMS, M_WAITOK);
365 DRM_DEBUG_KMS("got EDID from %s\n", drm_get_connector_name(connector));
369 DRM_DEBUG_KMS("%s: EDID block %d invalid.\n",
370 drm_get_connector_name(connector), j);
373 free(block, DRM_MEM_KMS);
378 * Probe DDC presence.
380 * \param adapter : i2c device adaptor
381 * \return 1 on success
384 drm_probe_ddc(device_t adapter)
388 return (drm_do_probe_ddc_edid(adapter, &out, 0, 1) == 0);
392 * drm_get_edid - get EDID data, if available
393 * @connector: connector we're probing
394 * @adapter: i2c adapter to use for DDC
396 * Poke the given i2c channel to grab EDID data if possible. If found,
397 * attach it to the connector.
399 * Return edid data or NULL if we couldn't find any.
401 struct edid *drm_get_edid(struct drm_connector *connector,
404 struct edid *edid = NULL;
406 if (drm_probe_ddc(adapter))
407 edid = (struct edid *)drm_do_get_edid(connector, adapter);
409 connector->display_info.raw_edid = (char *)edid;
415 /*** EDID parsing ***/
418 * edid_vendor - match a string against EDID's obfuscated vendor field
419 * @edid: EDID to match
420 * @vendor: vendor string
422 * Returns true if @vendor is in @edid, false otherwise
424 static bool edid_vendor(struct edid *edid, char *vendor)
428 edid_vendor[0] = ((edid->mfg_id[0] & 0x7c) >> 2) + '@';
429 edid_vendor[1] = (((edid->mfg_id[0] & 0x3) << 3) |
430 ((edid->mfg_id[1] & 0xe0) >> 5)) + '@';
431 edid_vendor[2] = (edid->mfg_id[1] & 0x1f) + '@';
433 return !strncmp(edid_vendor, vendor, 3);
437 * edid_get_quirks - return quirk flags for a given EDID
438 * @edid: EDID to process
440 * This tells subsequent routines what fixes they need to apply.
442 static u32 edid_get_quirks(struct edid *edid)
444 struct edid_quirk *quirk;
447 for (i = 0; i < DRM_ARRAY_SIZE(edid_quirk_list); i++) {
448 quirk = &edid_quirk_list[i];
450 if (edid_vendor(edid, quirk->vendor) &&
451 (EDID_PRODUCT_ID(edid) == quirk->product_id))
452 return quirk->quirks;
458 #define MODE_SIZE(m) ((m)->hdisplay * (m)->vdisplay)
459 #define MODE_REFRESH_DIFF(m,r) (abs((m)->vrefresh - target_refresh))
462 * edid_fixup_preferred - set preferred modes based on quirk list
463 * @connector: has mode list to fix up
464 * @quirks: quirks list
466 * Walk the mode list for @connector, clearing the preferred status
467 * on existing modes and setting it anew for the right mode ala @quirks.
469 static void edid_fixup_preferred(struct drm_connector *connector,
472 struct drm_display_mode *t, *cur_mode, *preferred_mode;
473 int target_refresh = 0;
475 if (list_empty(&connector->probed_modes))
478 if (quirks & EDID_QUIRK_PREFER_LARGE_60)
480 if (quirks & EDID_QUIRK_PREFER_LARGE_75)
483 preferred_mode = list_first_entry(&connector->probed_modes,
484 struct drm_display_mode, head);
486 list_for_each_entry_safe(cur_mode, t, &connector->probed_modes, head) {
487 cur_mode->type &= ~DRM_MODE_TYPE_PREFERRED;
489 if (cur_mode == preferred_mode)
492 /* Largest mode is preferred */
493 if (MODE_SIZE(cur_mode) > MODE_SIZE(preferred_mode))
494 preferred_mode = cur_mode;
496 /* At a given size, try to get closest to target refresh */
497 if ((MODE_SIZE(cur_mode) == MODE_SIZE(preferred_mode)) &&
498 MODE_REFRESH_DIFF(cur_mode, target_refresh) <
499 MODE_REFRESH_DIFF(preferred_mode, target_refresh)) {
500 preferred_mode = cur_mode;
504 preferred_mode->type |= DRM_MODE_TYPE_PREFERRED;
508 mode_is_rb(const struct drm_display_mode *mode)
510 return (mode->htotal - mode->hdisplay == 160) &&
511 (mode->hsync_end - mode->hdisplay == 80) &&
512 (mode->hsync_end - mode->hsync_start == 32) &&
513 (mode->vsync_start - mode->vdisplay == 3);
517 * drm_mode_find_dmt - Create a copy of a mode if present in DMT
518 * @dev: Device to duplicate against
520 * @vsize: Mode height
521 * @fresh: Mode refresh rate
522 * @rb: Mode reduced-blanking-ness
524 * Walk the DMT mode list looking for a match for the given parameters.
525 * Return a newly allocated copy of the mode, or NULL if not found.
527 struct drm_display_mode *drm_mode_find_dmt(struct drm_device *dev,
528 int hsize, int vsize, int fresh,
533 for (i = 0; i < drm_num_dmt_modes; i++) {
534 struct drm_display_mode *ptr = &drm_dmt_modes[i];
535 if (hsize != ptr->hdisplay)
537 if (vsize != ptr->vdisplay)
539 if (fresh != drm_mode_vrefresh(ptr))
541 if (rb != mode_is_rb(ptr))
544 return drm_mode_duplicate(dev, ptr);
550 typedef void detailed_cb(struct detailed_timing *timing, void *closure);
553 cea_for_each_detailed_block(u8 *ext, detailed_cb *cb, void *closure)
556 u8 rev = ext[0x01], d = ext[0x02];
557 u8 *det_base = ext + d;
564 /* have to infer how many blocks we have, check pixel clock */
565 for (i = 0; i < 6; i++)
566 if (det_base[18*i] || det_base[18*i+1])
571 n = min(ext[0x03] & 0x0f, 6);
575 for (i = 0; i < n; i++)
576 cb((struct detailed_timing *)(det_base + 18 * i), closure);
580 vtb_for_each_detailed_block(u8 *ext, detailed_cb *cb, void *closure)
582 unsigned int i, n = min((int)ext[0x02], 6);
583 u8 *det_base = ext + 5;
586 return; /* unknown version */
588 for (i = 0; i < n; i++)
589 cb((struct detailed_timing *)(det_base + 18 * i), closure);
593 drm_for_each_detailed_block(u8 *raw_edid, detailed_cb *cb, void *closure)
596 struct edid *edid = (struct edid *)raw_edid;
601 for (i = 0; i < EDID_DETAILED_TIMINGS; i++)
602 cb(&(edid->detailed_timings[i]), closure);
604 for (i = 1; i <= raw_edid[0x7e]; i++) {
605 u8 *ext = raw_edid + (i * EDID_LENGTH);
608 cea_for_each_detailed_block(ext, cb, closure);
611 vtb_for_each_detailed_block(ext, cb, closure);
620 is_rb(struct detailed_timing *t, void *data)
623 if (r[3] == EDID_DETAIL_MONITOR_RANGE)
625 *(bool *)data = true;
628 /* EDID 1.4 defines this explicitly. For EDID 1.3, we guess, badly. */
630 drm_monitor_supports_rb(struct edid *edid)
632 if (edid->revision >= 4) {
634 drm_for_each_detailed_block((u8 *)edid, is_rb, &ret);
638 return ((edid->input & DRM_EDID_INPUT_DIGITAL) != 0);
642 find_gtf2(struct detailed_timing *t, void *data)
645 if (r[3] == EDID_DETAIL_MONITOR_RANGE && r[10] == 0x02)
649 /* Secondary GTF curve kicks in above some break frequency */
651 drm_gtf2_hbreak(struct edid *edid)
654 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
655 return r ? (r[12] * 2) : 0;
659 drm_gtf2_2c(struct edid *edid)
662 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
663 return r ? r[13] : 0;
667 drm_gtf2_m(struct edid *edid)
670 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
671 return r ? (r[15] << 8) + r[14] : 0;
675 drm_gtf2_k(struct edid *edid)
678 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
679 return r ? r[16] : 0;
683 drm_gtf2_2j(struct edid *edid)
686 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
687 return r ? r[17] : 0;
691 * standard_timing_level - get std. timing level(CVT/GTF/DMT)
692 * @edid: EDID block to scan
694 static int standard_timing_level(struct edid *edid)
696 if (edid->revision >= 2) {
697 if (edid->revision >= 4 && (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF))
699 if (drm_gtf2_hbreak(edid))
707 * 0 is reserved. The spec says 0x01 fill for unused timings. Some old
708 * monitors fill with ascii space (0x20) instead.
711 bad_std_timing(u8 a, u8 b)
713 return (a == 0x00 && b == 0x00) ||
714 (a == 0x01 && b == 0x01) ||
715 (a == 0x20 && b == 0x20);
719 * drm_mode_std - convert standard mode info (width, height, refresh) into mode
720 * @t: standard timing params
721 * @timing_level: standard timing level
723 * Take the standard timing params (in this case width, aspect, and refresh)
724 * and convert them into a real mode using CVT/GTF/DMT.
726 static struct drm_display_mode *
727 drm_mode_std(struct drm_connector *connector, struct edid *edid,
728 struct std_timing *t, int revision)
730 struct drm_device *dev = connector->dev;
731 struct drm_display_mode *m, *mode = NULL;
734 unsigned aspect_ratio = (t->vfreq_aspect & EDID_TIMING_ASPECT_MASK)
735 >> EDID_TIMING_ASPECT_SHIFT;
736 unsigned vfreq = (t->vfreq_aspect & EDID_TIMING_VFREQ_MASK)
737 >> EDID_TIMING_VFREQ_SHIFT;
738 int timing_level = standard_timing_level(edid);
740 if (bad_std_timing(t->hsize, t->vfreq_aspect))
743 /* According to the EDID spec, the hdisplay = hsize * 8 + 248 */
744 hsize = t->hsize * 8 + 248;
745 /* vrefresh_rate = vfreq + 60 */
746 vrefresh_rate = vfreq + 60;
747 /* the vdisplay is calculated based on the aspect ratio */
748 if (aspect_ratio == 0) {
752 vsize = (hsize * 10) / 16;
753 } else if (aspect_ratio == 1)
754 vsize = (hsize * 3) / 4;
755 else if (aspect_ratio == 2)
756 vsize = (hsize * 4) / 5;
758 vsize = (hsize * 9) / 16;
760 /* HDTV hack, part 1 */
761 if (vrefresh_rate == 60 &&
762 ((hsize == 1360 && vsize == 765) ||
763 (hsize == 1368 && vsize == 769))) {
769 * If this connector already has a mode for this size and refresh
770 * rate (because it came from detailed or CVT info), use that
771 * instead. This way we don't have to guess at interlace or
774 list_for_each_entry(m, &connector->probed_modes, head)
775 if (m->hdisplay == hsize && m->vdisplay == vsize &&
776 drm_mode_vrefresh(m) == vrefresh_rate)
779 /* HDTV hack, part 2 */
780 if (hsize == 1366 && vsize == 768 && vrefresh_rate == 60) {
781 mode = drm_cvt_mode(dev, 1366, 768, vrefresh_rate, 0, 0,
783 mode->hdisplay = 1366;
784 mode->hsync_start = mode->hsync_start - 1;
785 mode->hsync_end = mode->hsync_end - 1;
789 /* check whether it can be found in default mode table */
790 if (drm_monitor_supports_rb(edid)) {
791 mode = drm_mode_find_dmt(dev, hsize, vsize, vrefresh_rate,
796 mode = drm_mode_find_dmt(dev, hsize, vsize, vrefresh_rate, false);
800 /* okay, generate it */
801 switch (timing_level) {
805 mode = drm_gtf_mode(dev, hsize, vsize, vrefresh_rate, 0, 0);
809 * This is potentially wrong if there's ever a monitor with
810 * more than one ranges section, each claiming a different
811 * secondary GTF curve. Please don't do that.
813 mode = drm_gtf_mode(dev, hsize, vsize, vrefresh_rate, 0, 0);
816 if (drm_mode_hsync(mode) > drm_gtf2_hbreak(edid)) {
817 free(mode, DRM_MEM_KMS);
818 mode = drm_gtf_mode_complex(dev, hsize, vsize,
827 mode = drm_cvt_mode(dev, hsize, vsize, vrefresh_rate, 0, 0,
835 * EDID is delightfully ambiguous about how interlaced modes are to be
836 * encoded. Our internal representation is of frame height, but some
837 * HDTV detailed timings are encoded as field height.
839 * The format list here is from CEA, in frame size. Technically we
840 * should be checking refresh rate too. Whatever.
843 drm_mode_do_interlace_quirk(struct drm_display_mode *mode,
844 struct detailed_pixel_timing *pt)
847 static const struct {
849 } cea_interlaced[] = {
859 if (!(pt->misc & DRM_EDID_PT_INTERLACED))
862 for (i = 0; i < DRM_ARRAY_SIZE(cea_interlaced); i++) {
863 if ((mode->hdisplay == cea_interlaced[i].w) &&
864 (mode->vdisplay == cea_interlaced[i].h / 2)) {
866 mode->vsync_start *= 2;
867 mode->vsync_end *= 2;
873 mode->flags |= DRM_MODE_FLAG_INTERLACE;
877 * drm_mode_detailed - create a new mode from an EDID detailed timing section
878 * @dev: DRM device (needed to create new mode)
880 * @timing: EDID detailed timing info
881 * @quirks: quirks to apply
883 * An EDID detailed timing block contains enough info for us to create and
884 * return a new struct drm_display_mode.
886 static struct drm_display_mode *drm_mode_detailed(struct drm_device *dev,
888 struct detailed_timing *timing,
891 struct drm_display_mode *mode;
892 struct detailed_pixel_timing *pt = &timing->data.pixel_data;
893 unsigned hactive = (pt->hactive_hblank_hi & 0xf0) << 4 | pt->hactive_lo;
894 unsigned vactive = (pt->vactive_vblank_hi & 0xf0) << 4 | pt->vactive_lo;
895 unsigned hblank = (pt->hactive_hblank_hi & 0xf) << 8 | pt->hblank_lo;
896 unsigned vblank = (pt->vactive_vblank_hi & 0xf) << 8 | pt->vblank_lo;
897 unsigned hsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc0) << 2 | pt->hsync_offset_lo;
898 unsigned hsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x30) << 4 | pt->hsync_pulse_width_lo;
899 unsigned vsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc) >> 2 | pt->vsync_offset_pulse_width_lo >> 4;
900 unsigned vsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x3) << 4 | (pt->vsync_offset_pulse_width_lo & 0xf);
902 /* ignore tiny modes */
903 if (hactive < 64 || vactive < 64)
906 if (pt->misc & DRM_EDID_PT_STEREO) {
907 printf("stereo mode not supported\n");
910 if (!(pt->misc & DRM_EDID_PT_SEPARATE_SYNC)) {
911 printf("composite sync not supported\n");
914 /* it is incorrect if hsync/vsync width is zero */
915 if (!hsync_pulse_width || !vsync_pulse_width) {
916 DRM_DEBUG_KMS("Incorrect Detailed timing. "
917 "Wrong Hsync/Vsync pulse width\n");
920 mode = drm_mode_create(dev);
924 mode->type = DRM_MODE_TYPE_DRIVER;
926 if (quirks & EDID_QUIRK_135_CLOCK_TOO_HIGH)
927 timing->pixel_clock = htole16(1088);
929 mode->clock = le16toh(timing->pixel_clock) * 10;
931 mode->hdisplay = hactive;
932 mode->hsync_start = mode->hdisplay + hsync_offset;
933 mode->hsync_end = mode->hsync_start + hsync_pulse_width;
934 mode->htotal = mode->hdisplay + hblank;
936 mode->vdisplay = vactive;
937 mode->vsync_start = mode->vdisplay + vsync_offset;
938 mode->vsync_end = mode->vsync_start + vsync_pulse_width;
939 mode->vtotal = mode->vdisplay + vblank;
941 /* Some EDIDs have bogus h/vtotal values */
942 if (mode->hsync_end > mode->htotal)
943 mode->htotal = mode->hsync_end + 1;
944 if (mode->vsync_end > mode->vtotal)
945 mode->vtotal = mode->vsync_end + 1;
947 drm_mode_do_interlace_quirk(mode, pt);
949 drm_mode_set_name(mode);
951 if (quirks & EDID_QUIRK_DETAILED_SYNC_PP) {
952 pt->misc |= DRM_EDID_PT_HSYNC_POSITIVE | DRM_EDID_PT_VSYNC_POSITIVE;
955 mode->flags |= (pt->misc & DRM_EDID_PT_HSYNC_POSITIVE) ?
956 DRM_MODE_FLAG_PHSYNC : DRM_MODE_FLAG_NHSYNC;
957 mode->flags |= (pt->misc & DRM_EDID_PT_VSYNC_POSITIVE) ?
958 DRM_MODE_FLAG_PVSYNC : DRM_MODE_FLAG_NVSYNC;
960 mode->width_mm = pt->width_mm_lo | (pt->width_height_mm_hi & 0xf0) << 4;
961 mode->height_mm = pt->height_mm_lo | (pt->width_height_mm_hi & 0xf) << 8;
963 if (quirks & EDID_QUIRK_DETAILED_IN_CM) {
964 mode->width_mm *= 10;
965 mode->height_mm *= 10;
968 if (quirks & EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE) {
969 mode->width_mm = edid->width_cm * 10;
970 mode->height_mm = edid->height_cm * 10;
977 mode_in_hsync_range(struct drm_display_mode *mode,
978 struct edid *edid, u8 *t)
980 int hsync, hmin, hmax;
983 if (edid->revision >= 4)
984 hmin += ((t[4] & 0x04) ? 255 : 0);
986 if (edid->revision >= 4)
987 hmax += ((t[4] & 0x08) ? 255 : 0);
988 hsync = drm_mode_hsync(mode);
990 return (hsync <= hmax && hsync >= hmin);
994 mode_in_vsync_range(struct drm_display_mode *mode,
995 struct edid *edid, u8 *t)
997 int vsync, vmin, vmax;
1000 if (edid->revision >= 4)
1001 vmin += ((t[4] & 0x01) ? 255 : 0);
1003 if (edid->revision >= 4)
1004 vmax += ((t[4] & 0x02) ? 255 : 0);
1005 vsync = drm_mode_vrefresh(mode);
1007 return (vsync <= vmax && vsync >= vmin);
1011 range_pixel_clock(struct edid *edid, u8 *t)
1014 if (t[9] == 0 || t[9] == 255)
1017 /* 1.4 with CVT support gives us real precision, yay */
1018 if (edid->revision >= 4 && t[10] == 0x04)
1019 return (t[9] * 10000) - ((t[12] >> 2) * 250);
1021 /* 1.3 is pathetic, so fuzz up a bit */
1022 return t[9] * 10000 + 5001;
1026 mode_in_range(struct drm_display_mode *mode, struct edid *edid,
1027 struct detailed_timing *timing)
1030 u8 *t = (u8 *)timing;
1032 if (!mode_in_hsync_range(mode, edid, t))
1035 if (!mode_in_vsync_range(mode, edid, t))
1038 if ((max_clock = range_pixel_clock(edid, t)))
1039 if (mode->clock > max_clock)
1042 /* 1.4 max horizontal check */
1043 if (edid->revision >= 4 && t[10] == 0x04)
1044 if (t[13] && mode->hdisplay > 8 * (t[13] + (256 * (t[12]&0x3))))
1047 if (mode_is_rb(mode) && !drm_monitor_supports_rb(edid))
1054 drm_dmt_modes_for_range(struct drm_connector *connector, struct edid *edid,
1055 struct detailed_timing *timing)
1058 struct drm_display_mode *newmode;
1059 struct drm_device *dev = connector->dev;
1061 for (i = 0; i < drm_num_dmt_modes; i++) {
1062 if (mode_in_range(drm_dmt_modes + i, edid, timing)) {
1063 newmode = drm_mode_duplicate(dev, &drm_dmt_modes[i]);
1065 drm_mode_probed_add(connector, newmode);
1074 /* fix up 1366x768 mode from 1368x768;
1075 * GFT/CVT can't express 1366 width which isn't dividable by 8
1077 static void fixup_mode_1366x768(struct drm_display_mode *mode)
1079 if (mode->hdisplay == 1368 && mode->vdisplay == 768) {
1080 mode->hdisplay = 1366;
1081 mode->hsync_start--;
1083 drm_mode_set_name(mode);
1088 drm_gtf_modes_for_range(struct drm_connector *connector, struct edid *edid,
1089 struct detailed_timing *timing)
1092 struct drm_display_mode *newmode;
1093 struct drm_device *dev = connector->dev;
1095 for (i = 0; i < num_extra_modes; i++) {
1096 const struct minimode *m = &extra_modes[i];
1097 newmode = drm_gtf_mode(dev, m->w, m->h, m->r, 0, 0);
1101 fixup_mode_1366x768(newmode);
1102 if (!mode_in_range(newmode, edid, timing)) {
1103 drm_mode_destroy(dev, newmode);
1107 drm_mode_probed_add(connector, newmode);
1115 drm_cvt_modes_for_range(struct drm_connector *connector, struct edid *edid,
1116 struct detailed_timing *timing)
1119 struct drm_display_mode *newmode;
1120 struct drm_device *dev = connector->dev;
1121 bool rb = drm_monitor_supports_rb(edid);
1123 for (i = 0; i < num_extra_modes; i++) {
1124 const struct minimode *m = &extra_modes[i];
1125 newmode = drm_cvt_mode(dev, m->w, m->h, m->r, rb, 0, 0);
1129 fixup_mode_1366x768(newmode);
1130 if (!mode_in_range(newmode, edid, timing)) {
1131 drm_mode_destroy(dev, newmode);
1135 drm_mode_probed_add(connector, newmode);
1143 do_inferred_modes(struct detailed_timing *timing, void *c)
1145 struct detailed_mode_closure *closure = c;
1146 struct detailed_non_pixel *data = &timing->data.other_data;
1147 struct detailed_data_monitor_range *range = &data->data.range;
1149 if (data->type != EDID_DETAIL_MONITOR_RANGE)
1152 closure->modes += drm_dmt_modes_for_range(closure->connector,
1156 if (!version_greater(closure->edid, 1, 1))
1157 return; /* GTF not defined yet */
1159 switch (range->flags) {
1160 case 0x02: /* secondary gtf, XXX could do more */
1161 case 0x00: /* default gtf */
1162 closure->modes += drm_gtf_modes_for_range(closure->connector,
1166 case 0x04: /* cvt, only in 1.4+ */
1167 if (!version_greater(closure->edid, 1, 3))
1170 closure->modes += drm_cvt_modes_for_range(closure->connector,
1174 case 0x01: /* just the ranges, no formula */
1181 add_inferred_modes(struct drm_connector *connector, struct edid *edid)
1183 struct detailed_mode_closure closure = {
1184 connector, edid, 0, 0, 0
1187 if (version_greater(edid, 1, 0))
1188 drm_for_each_detailed_block((u8 *)edid, do_inferred_modes,
1191 return closure.modes;
1195 drm_est3_modes(struct drm_connector *connector, struct detailed_timing *timing)
1197 int i, j, m, modes = 0;
1198 struct drm_display_mode *mode;
1199 u8 *est = ((u8 *)timing) + 5;
1201 for (i = 0; i < 6; i++) {
1202 for (j = 7; j > 0; j--) {
1203 m = (i * 8) + (7 - j);
1204 if (m >= DRM_ARRAY_SIZE(est3_modes))
1206 if (est[i] & (1 << j)) {
1207 mode = drm_mode_find_dmt(connector->dev,
1213 drm_mode_probed_add(connector, mode);
1224 do_established_modes(struct detailed_timing *timing, void *c)
1226 struct detailed_mode_closure *closure = c;
1227 struct detailed_non_pixel *data = &timing->data.other_data;
1229 if (data->type == EDID_DETAIL_EST_TIMINGS)
1230 closure->modes += drm_est3_modes(closure->connector, timing);
1234 * add_established_modes - get est. modes from EDID and add them
1235 * @edid: EDID block to scan
1237 * Each EDID block contains a bitmap of the supported "established modes" list
1238 * (defined above). Tease them out and add them to the global modes list.
1241 add_established_modes(struct drm_connector *connector, struct edid *edid)
1243 struct drm_device *dev = connector->dev;
1244 unsigned long est_bits = edid->established_timings.t1 |
1245 (edid->established_timings.t2 << 8) |
1246 ((edid->established_timings.mfg_rsvd & 0x80) << 9);
1248 struct detailed_mode_closure closure = {
1249 connector, edid, 0, 0, 0
1252 for (i = 0; i <= EDID_EST_TIMINGS; i++) {
1253 if (est_bits & (1<<i)) {
1254 struct drm_display_mode *newmode;
1255 newmode = drm_mode_duplicate(dev, &edid_est_modes[i]);
1257 drm_mode_probed_add(connector, newmode);
1263 if (version_greater(edid, 1, 0))
1264 drm_for_each_detailed_block((u8 *)edid,
1265 do_established_modes, &closure);
1267 return modes + closure.modes;
1271 do_standard_modes(struct detailed_timing *timing, void *c)
1273 struct detailed_mode_closure *closure = c;
1274 struct detailed_non_pixel *data = &timing->data.other_data;
1275 struct drm_connector *connector = closure->connector;
1276 struct edid *edid = closure->edid;
1278 if (data->type == EDID_DETAIL_STD_MODES) {
1280 for (i = 0; i < 6; i++) {
1281 struct std_timing *std;
1282 struct drm_display_mode *newmode;
1284 std = &data->data.timings[i];
1285 newmode = drm_mode_std(connector, edid, std,
1288 drm_mode_probed_add(connector, newmode);
1296 * add_standard_modes - get std. modes from EDID and add them
1297 * @edid: EDID block to scan
1299 * Standard modes can be calculated using the appropriate standard (DMT,
1300 * GTF or CVT. Grab them from @edid and add them to the list.
1303 add_standard_modes(struct drm_connector *connector, struct edid *edid)
1306 struct detailed_mode_closure closure = {
1307 connector, edid, 0, 0, 0
1310 for (i = 0; i < EDID_STD_TIMINGS; i++) {
1311 struct drm_display_mode *newmode;
1313 newmode = drm_mode_std(connector, edid,
1314 &edid->standard_timings[i],
1317 drm_mode_probed_add(connector, newmode);
1322 if (version_greater(edid, 1, 0))
1323 drm_for_each_detailed_block((u8 *)edid, do_standard_modes,
1326 /* XXX should also look for standard codes in VTB blocks */
1328 return modes + closure.modes;
1331 static int drm_cvt_modes(struct drm_connector *connector,
1332 struct detailed_timing *timing)
1334 int i, j, modes = 0;
1335 struct drm_display_mode *newmode;
1336 struct drm_device *dev = connector->dev;
1337 struct cvt_timing *cvt;
1338 const int rates[] = { 60, 85, 75, 60, 50 };
1339 const u8 empty[3] = { 0, 0, 0 };
1341 for (i = 0; i < 4; i++) {
1342 int width = 0, height;
1343 cvt = &(timing->data.other_data.data.cvt[i]);
1345 if (!memcmp(cvt->code, empty, 3))
1348 height = (cvt->code[0] + ((cvt->code[1] & 0xf0) << 4) + 1) * 2;
1349 switch (cvt->code[1] & 0x0c) {
1351 width = height * 4 / 3;
1354 width = height * 16 / 9;
1357 width = height * 16 / 10;
1360 width = height * 15 / 9;
1364 for (j = 1; j < 5; j++) {
1365 if (cvt->code[2] & (1 << j)) {
1366 newmode = drm_cvt_mode(dev, width, height,
1370 drm_mode_probed_add(connector, newmode);
1381 do_cvt_mode(struct detailed_timing *timing, void *c)
1383 struct detailed_mode_closure *closure = c;
1384 struct detailed_non_pixel *data = &timing->data.other_data;
1386 if (data->type == EDID_DETAIL_CVT_3BYTE)
1387 closure->modes += drm_cvt_modes(closure->connector, timing);
1391 add_cvt_modes(struct drm_connector *connector, struct edid *edid)
1393 struct detailed_mode_closure closure = {
1394 connector, edid, 0, 0, 0
1397 if (version_greater(edid, 1, 2))
1398 drm_for_each_detailed_block((u8 *)edid, do_cvt_mode, &closure);
1400 /* XXX should also look for CVT codes in VTB blocks */
1402 return closure.modes;
1406 do_detailed_mode(struct detailed_timing *timing, void *c)
1408 struct detailed_mode_closure *closure = c;
1409 struct drm_display_mode *newmode;
1411 if (timing->pixel_clock) {
1412 newmode = drm_mode_detailed(closure->connector->dev,
1413 closure->edid, timing,
1418 if (closure->preferred)
1419 newmode->type |= DRM_MODE_TYPE_PREFERRED;
1421 drm_mode_probed_add(closure->connector, newmode);
1423 closure->preferred = 0;
1428 * add_detailed_modes - Add modes from detailed timings
1429 * @connector: attached connector
1430 * @edid: EDID block to scan
1431 * @quirks: quirks to apply
1434 add_detailed_modes(struct drm_connector *connector, struct edid *edid,
1437 struct detailed_mode_closure closure = {
1445 if (closure.preferred && !version_greater(edid, 1, 3))
1447 (edid->features & DRM_EDID_FEATURE_PREFERRED_TIMING);
1449 drm_for_each_detailed_block((u8 *)edid, do_detailed_mode, &closure);
1451 return closure.modes;
1454 #define HDMI_IDENTIFIER 0x000C03
1455 #define AUDIO_BLOCK 0x01
1456 #define VENDOR_BLOCK 0x03
1457 #define SPEAKER_BLOCK 0x04
1458 #define EDID_BASIC_AUDIO (1 << 6)
1459 #define EDID_CEA_YCRCB444 (1 << 5)
1460 #define EDID_CEA_YCRCB422 (1 << 4)
1463 * Search EDID for CEA extension block.
1465 u8 *drm_find_cea_extension(struct edid *edid)
1467 u8 *edid_ext = NULL;
1470 /* No EDID or EDID extensions */
1471 if (edid == NULL || edid->extensions == 0)
1474 /* Find CEA extension */
1475 for (i = 0; i < edid->extensions; i++) {
1476 edid_ext = (u8 *)edid + EDID_LENGTH * (i + 1);
1477 if (edid_ext[0] == CEA_EXT)
1481 if (i == edid->extensions)
1488 parse_hdmi_vsdb(struct drm_connector *connector, uint8_t *db)
1490 connector->eld[5] |= (db[6] >> 7) << 1; /* Supports_AI */
1492 connector->dvi_dual = db[6] & 1;
1493 connector->max_tmds_clock = db[7] * 5;
1495 connector->latency_present[0] = db[8] >> 7;
1496 connector->latency_present[1] = (db[8] >> 6) & 1;
1497 connector->video_latency[0] = db[9];
1498 connector->audio_latency[0] = db[10];
1499 connector->video_latency[1] = db[11];
1500 connector->audio_latency[1] = db[12];
1502 DRM_DEBUG_KMS("HDMI: DVI dual %d, "
1503 "max TMDS clock %d, "
1504 "latency present %d %d, "
1505 "video latency %d %d, "
1506 "audio latency %d %d\n",
1507 connector->dvi_dual,
1508 connector->max_tmds_clock,
1509 (int) connector->latency_present[0],
1510 (int) connector->latency_present[1],
1511 connector->video_latency[0],
1512 connector->video_latency[1],
1513 connector->audio_latency[0],
1514 connector->audio_latency[1]);
1518 monitor_name(struct detailed_timing *t, void *data)
1520 if (t->data.other_data.type == EDID_DETAIL_MONITOR_NAME)
1521 *(u8 **)data = t->data.other_data.data.str.str;
1525 * drm_edid_to_eld - build ELD from EDID
1526 * @connector: connector corresponding to the HDMI/DP sink
1527 * @edid: EDID to parse
1529 * Fill the ELD (EDID-Like Data) buffer for passing to the audio driver.
1530 * Some ELD fields are left to the graphics driver caller:
1535 void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid)
1537 uint8_t *eld = connector->eld;
1545 memset(eld, 0, sizeof(connector->eld));
1547 cea = drm_find_cea_extension(edid);
1549 DRM_DEBUG_KMS("ELD: no CEA Extension found\n");
1554 drm_for_each_detailed_block((u8 *)edid, monitor_name, &name);
1555 for (mnl = 0; name && mnl < 13; mnl++) {
1556 if (name[mnl] == 0x0a)
1558 eld[20 + mnl] = name[mnl];
1560 eld[4] = (cea[1] << 5) | mnl;
1561 DRM_DEBUG_KMS("ELD monitor %s\n", eld + 20);
1563 eld[0] = 2 << 3; /* ELD version: 2 */
1565 eld[16] = edid->mfg_id[0];
1566 eld[17] = edid->mfg_id[1];
1567 eld[18] = edid->prod_code[0];
1568 eld[19] = edid->prod_code[1];
1570 for (db = cea + 4; db < cea + cea[2]; db += dbl + 1) {
1573 switch ((db[0] & 0xe0) >> 5) {
1574 case AUDIO_BLOCK: /* Audio Data Block, contains SADs */
1575 sad_count = dbl / 3;
1576 memcpy(eld + 20 + mnl, &db[1], dbl);
1578 case SPEAKER_BLOCK: /* Speaker Allocation Data Block */
1582 /* HDMI Vendor-Specific Data Block */
1583 if (db[1] == 0x03 && db[2] == 0x0c && db[3] == 0)
1584 parse_hdmi_vsdb(connector, db);
1590 eld[5] |= sad_count << 4;
1591 eld[2] = (20 + mnl + sad_count * 3 + 3) / 4;
1593 DRM_DEBUG_KMS("ELD size %d, SAD count %d\n", (int)eld[2], sad_count);
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);
1634 * drm_select_eld - select one ELD from multiple HDMI/DP sinks
1635 * @encoder: the encoder just changed display mode
1636 * @mode: the adjusted display mode
1638 * It's possible for one encoder to be associated with multiple HDMI/DP sinks.
1639 * The policy is now hard coded to simply use the first HDMI/DP sink's ELD.
1641 struct drm_connector *drm_select_eld(struct drm_encoder *encoder,
1642 struct drm_display_mode *mode)
1644 struct drm_connector *connector;
1645 struct drm_device *dev = encoder->dev;
1647 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
1648 if (connector->encoder == encoder && connector->eld[0])
1655 * drm_detect_hdmi_monitor - detect whether monitor is hdmi.
1656 * @edid: monitor EDID information
1658 * Parse the CEA extension according to CEA-861-B.
1659 * Return true if HDMI, false if not or unknown.
1661 bool drm_detect_hdmi_monitor(struct edid *edid)
1665 int start_offset, end_offset;
1666 bool is_hdmi = false;
1668 edid_ext = drm_find_cea_extension(edid);
1672 /* Data block offset in CEA extension block */
1674 end_offset = edid_ext[2];
1677 * Because HDMI identifier is in Vendor Specific Block,
1678 * search it from all data blocks of CEA extension.
1680 for (i = start_offset; i < end_offset;
1681 /* Increased by data block len */
1682 i += ((edid_ext[i] & 0x1f) + 1)) {
1683 /* Find vendor specific block */
1684 if ((edid_ext[i] >> 5) == VENDOR_BLOCK) {
1685 hdmi_id = edid_ext[i + 1] | (edid_ext[i + 2] << 8) |
1686 edid_ext[i + 3] << 16;
1687 /* Find HDMI identifier */
1688 if (hdmi_id == HDMI_IDENTIFIER)
1699 * drm_detect_monitor_audio - check monitor audio capability
1701 * Monitor should have CEA extension block.
1702 * If monitor has 'basic audio', but no CEA audio blocks, it's 'basic
1703 * audio' only. If there is any audio extension block and supported
1704 * audio format, assume at least 'basic audio' support, even if 'basic
1705 * audio' is not defined in EDID.
1708 bool drm_detect_monitor_audio(struct edid *edid)
1712 bool has_audio = false;
1713 int start_offset, end_offset;
1715 edid_ext = drm_find_cea_extension(edid);
1719 has_audio = ((edid_ext[3] & EDID_BASIC_AUDIO) != 0);
1722 DRM_DEBUG_KMS("Monitor has basic audio support\n");
1726 /* Data block offset in CEA extension block */
1728 end_offset = edid_ext[2];
1730 for (i = start_offset; i < end_offset;
1731 i += ((edid_ext[i] & 0x1f) + 1)) {
1732 if ((edid_ext[i] >> 5) == AUDIO_BLOCK) {
1734 for (j = 1; j < (edid_ext[i] & 0x1f); j += 3)
1735 DRM_DEBUG_KMS("CEA audio format %d\n",
1736 (edid_ext[i + j] >> 3) & 0xf);
1745 * drm_add_display_info - pull display info out if present
1747 * @info: display info (attached to connector)
1749 * Grab any available display info and stuff it into the drm_display_info
1750 * structure that's part of the connector. Useful for tracking bpp and
1753 static void drm_add_display_info(struct edid *edid,
1754 struct drm_display_info *info)
1758 info->width_mm = edid->width_cm * 10;
1759 info->height_mm = edid->height_cm * 10;
1761 /* driver figures it out in this case */
1763 info->color_formats = 0;
1765 if (edid->revision < 3)
1768 if (!(edid->input & DRM_EDID_INPUT_DIGITAL))
1771 /* Get data from CEA blocks if present */
1772 edid_ext = drm_find_cea_extension(edid);
1774 info->cea_rev = edid_ext[1];
1776 /* The existence of a CEA block should imply RGB support */
1777 info->color_formats = DRM_COLOR_FORMAT_RGB444;
1778 if (edid_ext[3] & EDID_CEA_YCRCB444)
1779 info->color_formats |= DRM_COLOR_FORMAT_YCRCB444;
1780 if (edid_ext[3] & EDID_CEA_YCRCB422)
1781 info->color_formats |= DRM_COLOR_FORMAT_YCRCB422;
1784 /* Only defined for 1.4 with digital displays */
1785 if (edid->revision < 4)
1788 switch (edid->input & DRM_EDID_DIGITAL_DEPTH_MASK) {
1789 case DRM_EDID_DIGITAL_DEPTH_6:
1792 case DRM_EDID_DIGITAL_DEPTH_8:
1795 case DRM_EDID_DIGITAL_DEPTH_10:
1798 case DRM_EDID_DIGITAL_DEPTH_12:
1801 case DRM_EDID_DIGITAL_DEPTH_14:
1804 case DRM_EDID_DIGITAL_DEPTH_16:
1807 case DRM_EDID_DIGITAL_DEPTH_UNDEF:
1813 info->color_formats |= DRM_COLOR_FORMAT_RGB444;
1814 if (edid->features & DRM_EDID_FEATURE_RGB_YCRCB444)
1815 info->color_formats |= DRM_COLOR_FORMAT_YCRCB444;
1816 if (edid->features & DRM_EDID_FEATURE_RGB_YCRCB422)
1817 info->color_formats |= DRM_COLOR_FORMAT_YCRCB422;
1821 * drm_add_edid_modes - add modes from EDID data, if available
1822 * @connector: connector we're probing
1825 * Add the specified modes to the connector's mode list.
1827 * Return number of modes added or 0 if we couldn't find any.
1829 int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid)
1837 if (!drm_edid_is_valid(edid)) {
1838 device_printf(connector->dev->device, "%s: EDID invalid.\n",
1839 drm_get_connector_name(connector));
1843 quirks = edid_get_quirks(edid);
1846 * EDID spec says modes should be preferred in this order:
1847 * - preferred detailed mode
1848 * - other detailed modes from base block
1849 * - detailed modes from extension blocks
1850 * - CVT 3-byte code modes
1851 * - standard timing codes
1852 * - established timing codes
1853 * - modes inferred from GTF or CVT range information
1855 * We get this pretty much right.
1857 * XXX order for additional mode types in extension blocks?
1859 num_modes += add_detailed_modes(connector, edid, quirks);
1860 num_modes += add_cvt_modes(connector, edid);
1861 num_modes += add_standard_modes(connector, edid);
1862 num_modes += add_established_modes(connector, edid);
1863 num_modes += add_inferred_modes(connector, edid);
1865 if (quirks & (EDID_QUIRK_PREFER_LARGE_60 | EDID_QUIRK_PREFER_LARGE_75))
1866 edid_fixup_preferred(connector, quirks);
1868 drm_add_display_info(edid, &connector->display_info);
1874 * drm_add_modes_noedid - add modes for the connectors without EDID
1875 * @connector: connector we're probing
1876 * @hdisplay: the horizontal display limit
1877 * @vdisplay: the vertical display limit
1879 * Add the specified modes to the connector's mode list. Only when the
1880 * hdisplay/vdisplay is not beyond the given limit, it will be added.
1882 * Return number of modes added or 0 if we couldn't find any.
1884 int drm_add_modes_noedid(struct drm_connector *connector,
1885 int hdisplay, int vdisplay)
1887 int i, count, num_modes = 0;
1888 struct drm_display_mode *mode;
1889 struct drm_device *dev = connector->dev;
1891 count = sizeof(drm_dmt_modes) / sizeof(struct drm_display_mode);
1897 for (i = 0; i < count; i++) {
1898 struct drm_display_mode *ptr = &drm_dmt_modes[i];
1899 if (hdisplay && vdisplay) {
1901 * Only when two are valid, they will be used to check
1902 * whether the mode should be added to the mode list of
1905 if (ptr->hdisplay > hdisplay ||
1906 ptr->vdisplay > vdisplay)
1909 if (drm_mode_vrefresh(ptr) > 61)
1911 mode = drm_mode_duplicate(dev, ptr);
1913 drm_mode_probed_add(connector, mode);