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)
69 /* Force reduced-blanking timings for detailed modes */
70 #define EDID_QUIRK_FORCE_REDUCED_BLANKING (1 << 7)
72 #define EDID_QUIRK_FORCE_6BPC (1 << 10)
74 struct detailed_mode_closure {
75 struct drm_connector *connector;
87 static struct edid_quirk {
91 } edid_quirk_list[] = {
93 { "ACR", 44358, EDID_QUIRK_PREFER_LARGE_60 },
95 { "API", 0x7602, EDID_QUIRK_PREFER_LARGE_60 },
97 { "ACR", 2423, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
99 /* AEO model 0 reports 8 bpc, but is a 6 bpc panel */
100 { "AEO", 0, EDID_QUIRK_FORCE_6BPC },
102 /* Belinea 10 15 55 */
103 { "MAX", 1516, EDID_QUIRK_PREFER_LARGE_60 },
104 { "MAX", 0x77e, EDID_QUIRK_PREFER_LARGE_60 },
106 /* Envision Peripherals, Inc. EN-7100e */
107 { "EPI", 59264, EDID_QUIRK_135_CLOCK_TOO_HIGH },
108 /* Envision EN2028 */
109 { "EPI", 8232, EDID_QUIRK_PREFER_LARGE_60 },
111 /* Funai Electronics PM36B */
112 { "FCM", 13600, EDID_QUIRK_PREFER_LARGE_75 |
113 EDID_QUIRK_DETAILED_IN_CM },
115 /* LG Philips LCD LP154W01-A5 */
116 { "LPL", 0, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE },
117 { "LPL", 0x2a00, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE },
119 /* Philips 107p5 CRT */
120 { "PHL", 57364, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
123 { "PTS", 765, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
125 /* Samsung SyncMaster 205BW. Note: irony */
126 { "SAM", 541, EDID_QUIRK_DETAILED_SYNC_PP },
127 /* Samsung SyncMaster 22[5-6]BW */
128 { "SAM", 596, EDID_QUIRK_PREFER_LARGE_60 },
129 { "SAM", 638, EDID_QUIRK_PREFER_LARGE_60 },
131 /* ViewSonic VA2026w */
132 { "VSC", 5020, EDID_QUIRK_FORCE_REDUCED_BLANKING },
134 /* Medion MD 30217 PG */
135 { "MED", 0x7b8, EDID_QUIRK_PREFER_LARGE_75 },
138 /*** DDC fetch and block validation ***/
140 static const u8 edid_header[] = {
141 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00
145 * Sanity check the header of the base EDID block. Return 8 if the header
146 * is perfect, down to 0 if it's totally wrong.
148 int drm_edid_header_is_valid(const u8 *raw_edid)
152 for (i = 0; i < sizeof(edid_header); i++)
153 if (raw_edid[i] == edid_header[i])
158 EXPORT_SYMBOL(drm_edid_header_is_valid);
162 * Sanity check the EDID block (base or extension). Return 0 if the block
163 * doesn't check out, or 1 if it's valid.
166 drm_edid_block_valid(u8 *raw_edid)
170 struct edid *edid = (struct edid *)raw_edid;
172 if (raw_edid[0] == 0x00) {
173 int score = drm_edid_header_is_valid(raw_edid);
175 else if (score >= 6) {
176 DRM_DEBUG("Fixing EDID header, your hardware may be failing\n");
177 memcpy(raw_edid, edid_header, sizeof(edid_header));
183 for (i = 0; i < EDID_LENGTH; i++)
186 DRM_ERROR("EDID checksum is invalid, remainder is %d\n", csum);
188 /* allow CEA to slide through, switches mangle this */
189 if (raw_edid[0] != 0x02)
193 /* per-block-type checks */
194 switch (raw_edid[0]) {
196 if (edid->version != 1) {
197 DRM_ERROR("EDID has major version %d, instead of 1\n", edid->version);
201 if (edid->revision > 4)
202 DRM_DEBUG("EDID minor > 4, assuming backward compatibility\n");
213 printk(KERN_ERR "Raw EDID:\n");
214 print_hex_dump(KERN_ERR, " \t", DUMP_PREFIX_NONE, 16, 1,
215 raw_edid, EDID_LENGTH, false);
221 * drm_edid_is_valid - sanity check EDID data
224 * Sanity-check an entire EDID record (including extensions)
226 bool drm_edid_is_valid(struct edid *edid)
229 u8 *raw = (u8 *)edid;
234 for (i = 0; i <= edid->extensions; i++)
235 if (!drm_edid_block_valid(raw + i * EDID_LENGTH))
240 EXPORT_SYMBOL(drm_edid_is_valid);
242 #define DDC_ADDR 0x50
243 #define DDC_SEGMENT_ADDR 0x30
245 * Get EDID information via I2C.
247 * \param adapter : i2c device adaptor
248 * \param buf : EDID data buffer to be filled
249 * \param len : EDID data buffer length
250 * \return 0 on success or -1 on failure.
252 * Try to fetch EDID information by calling i2c driver function.
255 drm_do_probe_ddc_edid(struct i2c_adapter *adapter, unsigned char *buf,
258 unsigned char start = block * EDID_LENGTH;
259 int ret, retries = 5;
261 /* The core i2c driver will automatically retry the transfer if the
262 * adapter reports EAGAIN. However, we find that bit-banging transfers
263 * are susceptible to errors under a heavily loaded machine and
264 * generate spurious NAKs and timeouts. Retrying the transfer
265 * of the individual block a few times seems to overcome this.
268 struct i2c_msg msgs[] = {
281 ret = i2c_transfer(adapter, msgs, 2);
283 DRM_DEBUG_KMS("drm: skipping non-existent adapter %s\n",
287 } while (ret != 2 && --retries);
289 return ret == 2 ? 0 : -1;
292 static bool drm_edid_is_zero(u8 *in_edid, int length)
295 u32 *raw_edid = (u32 *)in_edid;
297 for (i = 0; i < length / 4; i++)
298 if (*(raw_edid + i) != 0)
304 drm_do_get_edid(struct drm_connector *connector, struct i2c_adapter *adapter)
306 int i, j = 0, valid_extensions = 0;
309 if ((block = kmalloc(EDID_LENGTH, GFP_KERNEL)) == NULL)
312 /* base block fetch */
313 for (i = 0; i < 4; i++) {
314 if (drm_do_probe_ddc_edid(adapter, block, 0, EDID_LENGTH))
316 if (drm_edid_block_valid(block))
318 if (i == 0 && drm_edid_is_zero(block, EDID_LENGTH)) {
319 connector->null_edid_counter++;
326 /* if there's no extensions, we're done */
327 if (block[0x7e] == 0)
330 new = krealloc(block, (block[0x7e] + 1) * EDID_LENGTH, GFP_KERNEL);
335 for (j = 1; j <= block[0x7e]; j++) {
336 for (i = 0; i < 4; i++) {
337 if (drm_do_probe_ddc_edid(adapter,
338 block + (valid_extensions + 1) * EDID_LENGTH,
341 if (drm_edid_block_valid(block + (valid_extensions + 1) * EDID_LENGTH)) {
347 dev_warn(connector->dev->dev,
348 "%s: Ignoring invalid EDID block %d.\n",
349 drm_get_connector_name(connector), j);
352 if (valid_extensions != block[0x7e]) {
353 block[EDID_LENGTH-1] += block[0x7e] - valid_extensions;
354 block[0x7e] = valid_extensions;
355 new = krealloc(block, (valid_extensions + 1) * EDID_LENGTH, GFP_KERNEL);
364 dev_warn(connector->dev->dev, "%s: EDID block %d invalid.\n",
365 drm_get_connector_name(connector), j);
373 * Probe DDC presence.
375 * \param adapter : i2c device adaptor
376 * \return 1 on success
379 drm_probe_ddc(struct i2c_adapter *adapter)
383 return (drm_do_probe_ddc_edid(adapter, &out, 0, 1) == 0);
387 * drm_get_edid - get EDID data, if available
388 * @connector: connector we're probing
389 * @adapter: i2c adapter to use for DDC
391 * Poke the given i2c channel to grab EDID data if possible. If found,
392 * attach it to the connector.
394 * Return edid data or NULL if we couldn't find any.
396 struct edid *drm_get_edid(struct drm_connector *connector,
397 struct i2c_adapter *adapter)
399 struct edid *edid = NULL;
401 if (drm_probe_ddc(adapter))
402 edid = (struct edid *)drm_do_get_edid(connector, adapter);
404 connector->display_info.raw_edid = (char *)edid;
409 EXPORT_SYMBOL(drm_get_edid);
411 /*** EDID parsing ***/
414 * edid_vendor - match a string against EDID's obfuscated vendor field
415 * @edid: EDID to match
416 * @vendor: vendor string
418 * Returns true if @vendor is in @edid, false otherwise
420 static bool edid_vendor(struct edid *edid, char *vendor)
424 edid_vendor[0] = ((edid->mfg_id[0] & 0x7c) >> 2) + '@';
425 edid_vendor[1] = (((edid->mfg_id[0] & 0x3) << 3) |
426 ((edid->mfg_id[1] & 0xe0) >> 5)) + '@';
427 edid_vendor[2] = (edid->mfg_id[1] & 0x1f) + '@';
429 return !strncmp(edid_vendor, vendor, 3);
433 * edid_get_quirks - return quirk flags for a given EDID
434 * @edid: EDID to process
436 * This tells subsequent routines what fixes they need to apply.
438 static u32 edid_get_quirks(struct edid *edid)
440 struct edid_quirk *quirk;
443 for (i = 0; i < ARRAY_SIZE(edid_quirk_list); i++) {
444 quirk = &edid_quirk_list[i];
446 if (edid_vendor(edid, quirk->vendor) &&
447 (EDID_PRODUCT_ID(edid) == quirk->product_id))
448 return quirk->quirks;
454 #define MODE_SIZE(m) ((m)->hdisplay * (m)->vdisplay)
455 #define MODE_REFRESH_DIFF(m,r) (abs((m)->vrefresh - target_refresh))
458 * edid_fixup_preferred - set preferred modes based on quirk list
459 * @connector: has mode list to fix up
460 * @quirks: quirks list
462 * Walk the mode list for @connector, clearing the preferred status
463 * on existing modes and setting it anew for the right mode ala @quirks.
465 static void edid_fixup_preferred(struct drm_connector *connector,
468 struct drm_display_mode *t, *cur_mode, *preferred_mode;
469 int target_refresh = 0;
471 if (list_empty(&connector->probed_modes))
474 if (quirks & EDID_QUIRK_PREFER_LARGE_60)
476 if (quirks & EDID_QUIRK_PREFER_LARGE_75)
479 preferred_mode = list_first_entry(&connector->probed_modes,
480 struct drm_display_mode, head);
482 list_for_each_entry_safe(cur_mode, t, &connector->probed_modes, head) {
483 cur_mode->type &= ~DRM_MODE_TYPE_PREFERRED;
485 if (cur_mode == preferred_mode)
488 /* Largest mode is preferred */
489 if (MODE_SIZE(cur_mode) > MODE_SIZE(preferred_mode))
490 preferred_mode = cur_mode;
492 /* At a given size, try to get closest to target refresh */
493 if ((MODE_SIZE(cur_mode) == MODE_SIZE(preferred_mode)) &&
494 MODE_REFRESH_DIFF(cur_mode, target_refresh) <
495 MODE_REFRESH_DIFF(preferred_mode, target_refresh)) {
496 preferred_mode = cur_mode;
500 preferred_mode->type |= DRM_MODE_TYPE_PREFERRED;
503 struct drm_display_mode *drm_mode_find_dmt(struct drm_device *dev,
504 int hsize, int vsize, int fresh)
506 struct drm_display_mode *mode = NULL;
509 for (i = 0; i < drm_num_dmt_modes; i++) {
510 const struct drm_display_mode *ptr = &drm_dmt_modes[i];
511 if (hsize == ptr->hdisplay &&
512 vsize == ptr->vdisplay &&
513 fresh == drm_mode_vrefresh(ptr)) {
514 /* get the expected default mode */
515 mode = drm_mode_duplicate(dev, ptr);
521 EXPORT_SYMBOL(drm_mode_find_dmt);
523 typedef void detailed_cb(struct detailed_timing *timing, void *closure);
526 cea_for_each_detailed_block(u8 *ext, detailed_cb *cb, void *closure)
529 u8 rev = ext[0x01], d = ext[0x02];
530 u8 *det_base = ext + d;
537 /* have to infer how many blocks we have, check pixel clock */
538 for (i = 0; i < 6; i++)
539 if (det_base[18*i] || det_base[18*i+1])
544 n = min(ext[0x03] & 0x0f, 6);
548 for (i = 0; i < n; i++)
549 cb((struct detailed_timing *)(det_base + 18 * i), closure);
553 vtb_for_each_detailed_block(u8 *ext, detailed_cb *cb, void *closure)
555 unsigned int i, n = min((int)ext[0x02], 6);
556 u8 *det_base = ext + 5;
559 return; /* unknown version */
561 for (i = 0; i < n; i++)
562 cb((struct detailed_timing *)(det_base + 18 * i), closure);
566 drm_for_each_detailed_block(u8 *raw_edid, detailed_cb *cb, void *closure)
569 struct edid *edid = (struct edid *)raw_edid;
574 for (i = 0; i < EDID_DETAILED_TIMINGS; i++)
575 cb(&(edid->detailed_timings[i]), closure);
577 for (i = 1; i <= raw_edid[0x7e]; i++) {
578 u8 *ext = raw_edid + (i * EDID_LENGTH);
581 cea_for_each_detailed_block(ext, cb, closure);
584 vtb_for_each_detailed_block(ext, cb, closure);
593 is_rb(struct detailed_timing *t, void *data)
596 if (r[3] == EDID_DETAIL_MONITOR_RANGE)
598 *(bool *)data = true;
601 /* EDID 1.4 defines this explicitly. For EDID 1.3, we guess, badly. */
603 drm_monitor_supports_rb(struct edid *edid)
605 if (edid->revision >= 4) {
607 drm_for_each_detailed_block((u8 *)edid, is_rb, &ret);
611 return ((edid->input & DRM_EDID_INPUT_DIGITAL) != 0);
615 find_gtf2(struct detailed_timing *t, void *data)
618 if (r[3] == EDID_DETAIL_MONITOR_RANGE && r[10] == 0x02)
622 /* Secondary GTF curve kicks in above some break frequency */
624 drm_gtf2_hbreak(struct edid *edid)
627 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
628 return r ? (r[12] * 2) : 0;
632 drm_gtf2_2c(struct edid *edid)
635 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
636 return r ? r[13] : 0;
640 drm_gtf2_m(struct edid *edid)
643 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
644 return r ? (r[15] << 8) + r[14] : 0;
648 drm_gtf2_k(struct edid *edid)
651 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
652 return r ? r[16] : 0;
656 drm_gtf2_2j(struct edid *edid)
659 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
660 return r ? r[17] : 0;
664 * standard_timing_level - get std. timing level(CVT/GTF/DMT)
665 * @edid: EDID block to scan
667 static int standard_timing_level(struct edid *edid)
669 if (edid->revision >= 2) {
670 if (edid->revision >= 4 && (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF))
672 if (drm_gtf2_hbreak(edid))
680 * 0 is reserved. The spec says 0x01 fill for unused timings. Some old
681 * monitors fill with ascii space (0x20) instead.
684 bad_std_timing(u8 a, u8 b)
686 return (a == 0x00 && b == 0x00) ||
687 (a == 0x01 && b == 0x01) ||
688 (a == 0x20 && b == 0x20);
692 * drm_mode_std - convert standard mode info (width, height, refresh) into mode
693 * @t: standard timing params
694 * @timing_level: standard timing level
696 * Take the standard timing params (in this case width, aspect, and refresh)
697 * and convert them into a real mode using CVT/GTF/DMT.
699 static struct drm_display_mode *
700 drm_mode_std(struct drm_connector *connector, struct edid *edid,
701 struct std_timing *t, int revision)
703 struct drm_device *dev = connector->dev;
704 struct drm_display_mode *m, *mode = NULL;
707 unsigned aspect_ratio = (t->vfreq_aspect & EDID_TIMING_ASPECT_MASK)
708 >> EDID_TIMING_ASPECT_SHIFT;
709 unsigned vfreq = (t->vfreq_aspect & EDID_TIMING_VFREQ_MASK)
710 >> EDID_TIMING_VFREQ_SHIFT;
711 int timing_level = standard_timing_level(edid);
713 if (bad_std_timing(t->hsize, t->vfreq_aspect))
716 /* According to the EDID spec, the hdisplay = hsize * 8 + 248 */
717 hsize = t->hsize * 8 + 248;
718 /* vrefresh_rate = vfreq + 60 */
719 vrefresh_rate = vfreq + 60;
720 /* the vdisplay is calculated based on the aspect ratio */
721 if (aspect_ratio == 0) {
725 vsize = (hsize * 10) / 16;
726 } else if (aspect_ratio == 1)
727 vsize = (hsize * 3) / 4;
728 else if (aspect_ratio == 2)
729 vsize = (hsize * 4) / 5;
731 vsize = (hsize * 9) / 16;
733 /* HDTV hack, part 1 */
734 if (vrefresh_rate == 60 &&
735 ((hsize == 1360 && vsize == 765) ||
736 (hsize == 1368 && vsize == 769))) {
742 * If this connector already has a mode for this size and refresh
743 * rate (because it came from detailed or CVT info), use that
744 * instead. This way we don't have to guess at interlace or
747 list_for_each_entry(m, &connector->probed_modes, head)
748 if (m->hdisplay == hsize && m->vdisplay == vsize &&
749 drm_mode_vrefresh(m) == vrefresh_rate)
752 /* HDTV hack, part 2 */
753 if (hsize == 1366 && vsize == 768 && vrefresh_rate == 60) {
754 mode = drm_cvt_mode(dev, 1366, 768, vrefresh_rate, 0, 0,
756 mode->hdisplay = 1366;
757 mode->hsync_start = mode->hsync_start - 1;
758 mode->hsync_end = mode->hsync_end - 1;
762 /* check whether it can be found in default mode table */
763 mode = drm_mode_find_dmt(dev, hsize, vsize, vrefresh_rate);
767 switch (timing_level) {
771 mode = drm_gtf_mode(dev, hsize, vsize, vrefresh_rate, 0, 0);
775 * This is potentially wrong if there's ever a monitor with
776 * more than one ranges section, each claiming a different
777 * secondary GTF curve. Please don't do that.
779 mode = drm_gtf_mode(dev, hsize, vsize, vrefresh_rate, 0, 0);
780 if (drm_mode_hsync(mode) > drm_gtf2_hbreak(edid)) {
782 mode = drm_gtf_mode_complex(dev, hsize, vsize,
791 mode = drm_cvt_mode(dev, hsize, vsize, vrefresh_rate, 0, 0,
799 * EDID is delightfully ambiguous about how interlaced modes are to be
800 * encoded. Our internal representation is of frame height, but some
801 * HDTV detailed timings are encoded as field height.
803 * The format list here is from CEA, in frame size. Technically we
804 * should be checking refresh rate too. Whatever.
807 drm_mode_do_interlace_quirk(struct drm_display_mode *mode,
808 struct detailed_pixel_timing *pt)
811 static const struct {
813 } cea_interlaced[] = {
823 if (!(pt->misc & DRM_EDID_PT_INTERLACED))
826 for (i = 0; i < ARRAY_SIZE(cea_interlaced); i++) {
827 if ((mode->hdisplay == cea_interlaced[i].w) &&
828 (mode->vdisplay == cea_interlaced[i].h / 2)) {
830 mode->vsync_start *= 2;
831 mode->vsync_end *= 2;
837 mode->flags |= DRM_MODE_FLAG_INTERLACE;
841 * drm_mode_detailed - create a new mode from an EDID detailed timing section
842 * @dev: DRM device (needed to create new mode)
844 * @timing: EDID detailed timing info
845 * @quirks: quirks to apply
847 * An EDID detailed timing block contains enough info for us to create and
848 * return a new struct drm_display_mode.
850 static struct drm_display_mode *drm_mode_detailed(struct drm_device *dev,
852 struct detailed_timing *timing,
855 struct drm_display_mode *mode;
856 struct detailed_pixel_timing *pt = &timing->data.pixel_data;
857 unsigned hactive = (pt->hactive_hblank_hi & 0xf0) << 4 | pt->hactive_lo;
858 unsigned vactive = (pt->vactive_vblank_hi & 0xf0) << 4 | pt->vactive_lo;
859 unsigned hblank = (pt->hactive_hblank_hi & 0xf) << 8 | pt->hblank_lo;
860 unsigned vblank = (pt->vactive_vblank_hi & 0xf) << 8 | pt->vblank_lo;
861 unsigned hsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc0) << 2 | pt->hsync_offset_lo;
862 unsigned hsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x30) << 4 | pt->hsync_pulse_width_lo;
863 unsigned vsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc) << 2 | pt->vsync_offset_pulse_width_lo >> 4;
864 unsigned vsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x3) << 4 | (pt->vsync_offset_pulse_width_lo & 0xf);
866 /* ignore tiny modes */
867 if (hactive < 64 || vactive < 64)
870 if (pt->misc & DRM_EDID_PT_STEREO) {
871 printk(KERN_WARNING "stereo mode not supported\n");
874 if (!(pt->misc & DRM_EDID_PT_SEPARATE_SYNC)) {
875 printk(KERN_WARNING "composite sync not supported\n");
878 /* it is incorrect if hsync/vsync width is zero */
879 if (!hsync_pulse_width || !vsync_pulse_width) {
880 DRM_DEBUG_KMS("Incorrect Detailed timing. "
881 "Wrong Hsync/Vsync pulse width\n");
885 if (quirks & EDID_QUIRK_FORCE_REDUCED_BLANKING) {
886 mode = drm_cvt_mode(dev, hactive, vactive, 60, true, false, false);
893 mode = drm_mode_create(dev);
897 if (quirks & EDID_QUIRK_135_CLOCK_TOO_HIGH)
898 timing->pixel_clock = cpu_to_le16(1088);
900 mode->clock = le16_to_cpu(timing->pixel_clock) * 10;
902 mode->hdisplay = hactive;
903 mode->hsync_start = mode->hdisplay + hsync_offset;
904 mode->hsync_end = mode->hsync_start + hsync_pulse_width;
905 mode->htotal = mode->hdisplay + hblank;
907 mode->vdisplay = vactive;
908 mode->vsync_start = mode->vdisplay + vsync_offset;
909 mode->vsync_end = mode->vsync_start + vsync_pulse_width;
910 mode->vtotal = mode->vdisplay + vblank;
912 /* Some EDIDs have bogus h/vtotal values */
913 if (mode->hsync_end > mode->htotal)
914 mode->htotal = mode->hsync_end + 1;
915 if (mode->vsync_end > mode->vtotal)
916 mode->vtotal = mode->vsync_end + 1;
918 drm_mode_do_interlace_quirk(mode, pt);
920 if (quirks & EDID_QUIRK_DETAILED_SYNC_PP) {
921 pt->misc |= DRM_EDID_PT_HSYNC_POSITIVE | DRM_EDID_PT_VSYNC_POSITIVE;
924 mode->flags |= (pt->misc & DRM_EDID_PT_HSYNC_POSITIVE) ?
925 DRM_MODE_FLAG_PHSYNC : DRM_MODE_FLAG_NHSYNC;
926 mode->flags |= (pt->misc & DRM_EDID_PT_VSYNC_POSITIVE) ?
927 DRM_MODE_FLAG_PVSYNC : DRM_MODE_FLAG_NVSYNC;
930 mode->width_mm = pt->width_mm_lo | (pt->width_height_mm_hi & 0xf0) << 4;
931 mode->height_mm = pt->height_mm_lo | (pt->width_height_mm_hi & 0xf) << 8;
933 if (quirks & EDID_QUIRK_DETAILED_IN_CM) {
934 mode->width_mm *= 10;
935 mode->height_mm *= 10;
938 if (quirks & EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE) {
939 mode->width_mm = edid->width_cm * 10;
940 mode->height_mm = edid->height_cm * 10;
943 mode->type = DRM_MODE_TYPE_DRIVER;
944 mode->vrefresh = drm_mode_vrefresh(mode);
945 drm_mode_set_name(mode);
951 mode_is_rb(const struct drm_display_mode *mode)
953 return (mode->htotal - mode->hdisplay == 160) &&
954 (mode->hsync_end - mode->hdisplay == 80) &&
955 (mode->hsync_end - mode->hsync_start == 32) &&
956 (mode->vsync_start - mode->vdisplay == 3);
960 mode_in_hsync_range(const struct drm_display_mode *mode,
961 struct edid *edid, u8 *t)
963 int hsync, hmin, hmax;
966 if (edid->revision >= 4)
967 hmin += ((t[4] & 0x04) ? 255 : 0);
969 if (edid->revision >= 4)
970 hmax += ((t[4] & 0x08) ? 255 : 0);
971 hsync = drm_mode_hsync(mode);
973 return (hsync <= hmax && hsync >= hmin);
977 mode_in_vsync_range(const struct drm_display_mode *mode,
978 struct edid *edid, u8 *t)
980 int vsync, vmin, vmax;
983 if (edid->revision >= 4)
984 vmin += ((t[4] & 0x01) ? 255 : 0);
986 if (edid->revision >= 4)
987 vmax += ((t[4] & 0x02) ? 255 : 0);
988 vsync = drm_mode_vrefresh(mode);
990 return (vsync <= vmax && vsync >= vmin);
994 range_pixel_clock(struct edid *edid, u8 *t)
997 if (t[9] == 0 || t[9] == 255)
1000 /* 1.4 with CVT support gives us real precision, yay */
1001 if (edid->revision >= 4 && t[10] == 0x04)
1002 return (t[9] * 10000) - ((t[12] >> 2) * 250);
1004 /* 1.3 is pathetic, so fuzz up a bit */
1005 return t[9] * 10000 + 5001;
1009 mode_in_range(const struct drm_display_mode *mode, struct edid *edid,
1010 struct detailed_timing *timing)
1013 u8 *t = (u8 *)timing;
1015 if (!mode_in_hsync_range(mode, edid, t))
1018 if (!mode_in_vsync_range(mode, edid, t))
1021 if ((max_clock = range_pixel_clock(edid, t)))
1022 if (mode->clock > max_clock)
1025 /* 1.4 max horizontal check */
1026 if (edid->revision >= 4 && t[10] == 0x04)
1027 if (t[13] && mode->hdisplay > 8 * (t[13] + (256 * (t[12]&0x3))))
1030 if (mode_is_rb(mode) && !drm_monitor_supports_rb(edid))
1037 * XXX If drm_dmt_modes ever regrows the CVT-R modes (and it will) this will
1038 * need to account for them.
1041 drm_gtf_modes_for_range(struct drm_connector *connector, struct edid *edid,
1042 struct detailed_timing *timing)
1045 struct drm_display_mode *newmode;
1046 struct drm_device *dev = connector->dev;
1048 for (i = 0; i < drm_num_dmt_modes; i++) {
1049 if (mode_in_range(drm_dmt_modes + i, edid, timing)) {
1050 newmode = drm_mode_duplicate(dev, &drm_dmt_modes[i]);
1052 drm_mode_probed_add(connector, newmode);
1062 do_inferred_modes(struct detailed_timing *timing, void *c)
1064 struct detailed_mode_closure *closure = c;
1065 struct detailed_non_pixel *data = &timing->data.other_data;
1066 int gtf = (closure->edid->features & DRM_EDID_FEATURE_DEFAULT_GTF);
1068 if (gtf && data->type == EDID_DETAIL_MONITOR_RANGE)
1069 closure->modes += drm_gtf_modes_for_range(closure->connector,
1075 add_inferred_modes(struct drm_connector *connector, struct edid *edid)
1077 struct detailed_mode_closure closure = {
1078 connector, edid, 0, 0, 0
1081 if (version_greater(edid, 1, 0))
1082 drm_for_each_detailed_block((u8 *)edid, do_inferred_modes,
1085 return closure.modes;
1089 drm_est3_modes(struct drm_connector *connector, struct detailed_timing *timing)
1091 int i, j, m, modes = 0;
1092 struct drm_display_mode *mode;
1093 u8 *est = ((u8 *)timing) + 5;
1095 for (i = 0; i < 6; i++) {
1096 for (j = 7; j > 0; j--) {
1097 m = (i * 8) + (7 - j);
1098 if (m >= ARRAY_SIZE(est3_modes))
1100 if (est[i] & (1 << j)) {
1101 mode = drm_mode_find_dmt(connector->dev,
1105 /*, est3_modes[m].rb */);
1107 drm_mode_probed_add(connector, mode);
1118 do_established_modes(struct detailed_timing *timing, void *c)
1120 struct detailed_mode_closure *closure = c;
1121 struct detailed_non_pixel *data = &timing->data.other_data;
1123 if (data->type == EDID_DETAIL_EST_TIMINGS)
1124 closure->modes += drm_est3_modes(closure->connector, timing);
1128 * add_established_modes - get est. modes from EDID and add them
1129 * @edid: EDID block to scan
1131 * Each EDID block contains a bitmap of the supported "established modes" list
1132 * (defined above). Tease them out and add them to the global modes list.
1135 add_established_modes(struct drm_connector *connector, struct edid *edid)
1137 struct drm_device *dev = connector->dev;
1138 unsigned long est_bits = edid->established_timings.t1 |
1139 (edid->established_timings.t2 << 8) |
1140 ((edid->established_timings.mfg_rsvd & 0x80) << 9);
1142 struct detailed_mode_closure closure = {
1143 connector, edid, 0, 0, 0
1146 for (i = 0; i <= EDID_EST_TIMINGS; i++) {
1147 if (est_bits & (1<<i)) {
1148 struct drm_display_mode *newmode;
1149 newmode = drm_mode_duplicate(dev, &edid_est_modes[i]);
1151 drm_mode_probed_add(connector, newmode);
1157 if (version_greater(edid, 1, 0))
1158 drm_for_each_detailed_block((u8 *)edid,
1159 do_established_modes, &closure);
1161 return modes + closure.modes;
1165 do_standard_modes(struct detailed_timing *timing, void *c)
1167 struct detailed_mode_closure *closure = c;
1168 struct detailed_non_pixel *data = &timing->data.other_data;
1169 struct drm_connector *connector = closure->connector;
1170 struct edid *edid = closure->edid;
1172 if (data->type == EDID_DETAIL_STD_MODES) {
1174 for (i = 0; i < 6; i++) {
1175 struct std_timing *std;
1176 struct drm_display_mode *newmode;
1178 std = &data->data.timings[i];
1179 newmode = drm_mode_std(connector, edid, std,
1182 drm_mode_probed_add(connector, newmode);
1190 * add_standard_modes - get std. modes from EDID and add them
1191 * @edid: EDID block to scan
1193 * Standard modes can be calculated using the appropriate standard (DMT,
1194 * GTF or CVT. Grab them from @edid and add them to the list.
1197 add_standard_modes(struct drm_connector *connector, struct edid *edid)
1200 struct detailed_mode_closure closure = {
1201 connector, edid, 0, 0, 0
1204 for (i = 0; i < EDID_STD_TIMINGS; i++) {
1205 struct drm_display_mode *newmode;
1207 newmode = drm_mode_std(connector, edid,
1208 &edid->standard_timings[i],
1211 drm_mode_probed_add(connector, newmode);
1216 if (version_greater(edid, 1, 0))
1217 drm_for_each_detailed_block((u8 *)edid, do_standard_modes,
1220 /* XXX should also look for standard codes in VTB blocks */
1222 return modes + closure.modes;
1225 static int drm_cvt_modes(struct drm_connector *connector,
1226 struct detailed_timing *timing)
1228 int i, j, modes = 0;
1229 struct drm_display_mode *newmode;
1230 struct drm_device *dev = connector->dev;
1231 struct cvt_timing *cvt;
1232 const int rates[] = { 60, 85, 75, 60, 50 };
1233 const u8 empty[3] = { 0, 0, 0 };
1235 for (i = 0; i < 4; i++) {
1236 int uninitialized_var(width), height;
1237 cvt = &(timing->data.other_data.data.cvt[i]);
1239 if (!memcmp(cvt->code, empty, 3))
1242 height = (cvt->code[0] + ((cvt->code[1] & 0xf0) << 4) + 1) * 2;
1243 switch (cvt->code[1] & 0x0c) {
1245 width = height * 4 / 3;
1248 width = height * 16 / 9;
1251 width = height * 16 / 10;
1254 width = height * 15 / 9;
1258 for (j = 1; j < 5; j++) {
1259 if (cvt->code[2] & (1 << j)) {
1260 newmode = drm_cvt_mode(dev, width, height,
1264 drm_mode_probed_add(connector, newmode);
1275 do_cvt_mode(struct detailed_timing *timing, void *c)
1277 struct detailed_mode_closure *closure = c;
1278 struct detailed_non_pixel *data = &timing->data.other_data;
1280 if (data->type == EDID_DETAIL_CVT_3BYTE)
1281 closure->modes += drm_cvt_modes(closure->connector, timing);
1285 add_cvt_modes(struct drm_connector *connector, struct edid *edid)
1287 struct detailed_mode_closure closure = {
1288 connector, edid, 0, 0, 0
1291 if (version_greater(edid, 1, 2))
1292 drm_for_each_detailed_block((u8 *)edid, do_cvt_mode, &closure);
1294 /* XXX should also look for CVT codes in VTB blocks */
1296 return closure.modes;
1300 do_detailed_mode(struct detailed_timing *timing, void *c)
1302 struct detailed_mode_closure *closure = c;
1303 struct drm_display_mode *newmode;
1305 if (timing->pixel_clock) {
1306 newmode = drm_mode_detailed(closure->connector->dev,
1307 closure->edid, timing,
1312 if (closure->preferred)
1313 newmode->type |= DRM_MODE_TYPE_PREFERRED;
1315 drm_mode_probed_add(closure->connector, newmode);
1317 closure->preferred = 0;
1322 * add_detailed_modes - Add modes from detailed timings
1323 * @connector: attached connector
1324 * @edid: EDID block to scan
1325 * @quirks: quirks to apply
1328 add_detailed_modes(struct drm_connector *connector, struct edid *edid,
1331 struct detailed_mode_closure closure = {
1339 if (closure.preferred && !version_greater(edid, 1, 3))
1341 (edid->features & DRM_EDID_FEATURE_PREFERRED_TIMING);
1343 drm_for_each_detailed_block((u8 *)edid, do_detailed_mode, &closure);
1345 return closure.modes;
1348 #define HDMI_IDENTIFIER 0x000C03
1349 #define AUDIO_BLOCK 0x01
1350 #define VENDOR_BLOCK 0x03
1351 #define SPEAKER_BLOCK 0x04
1352 #define EDID_BASIC_AUDIO (1 << 6)
1355 * Search EDID for CEA extension block.
1357 u8 *drm_find_cea_extension(struct edid *edid)
1359 u8 *edid_ext = NULL;
1362 /* No EDID or EDID extensions */
1363 if (edid == NULL || edid->extensions == 0)
1366 /* Find CEA extension */
1367 for (i = 0; i < edid->extensions; i++) {
1368 edid_ext = (u8 *)edid + EDID_LENGTH * (i + 1);
1369 if (edid_ext[0] == CEA_EXT)
1373 if (i == edid->extensions)
1378 EXPORT_SYMBOL(drm_find_cea_extension);
1381 parse_hdmi_vsdb(struct drm_connector *connector, uint8_t *db)
1383 connector->eld[5] |= (db[6] >> 7) << 1; /* Supports_AI */
1385 connector->dvi_dual = db[6] & 1;
1386 connector->max_tmds_clock = db[7] * 5;
1388 connector->latency_present[0] = db[8] >> 7;
1389 connector->latency_present[1] = (db[8] >> 6) & 1;
1390 connector->video_latency[0] = db[9];
1391 connector->audio_latency[0] = db[10];
1392 connector->video_latency[1] = db[11];
1393 connector->audio_latency[1] = db[12];
1395 DRM_LOG_KMS("HDMI: DVI dual %d, "
1396 "max TMDS clock %d, "
1397 "latency present %d %d, "
1398 "video latency %d %d, "
1399 "audio latency %d %d\n",
1400 connector->dvi_dual,
1401 connector->max_tmds_clock,
1402 (int) connector->latency_present[0],
1403 (int) connector->latency_present[1],
1404 connector->video_latency[0],
1405 connector->video_latency[1],
1406 connector->audio_latency[0],
1407 connector->audio_latency[1]);
1411 monitor_name(struct detailed_timing *t, void *data)
1413 if (t->data.other_data.type == EDID_DETAIL_MONITOR_NAME)
1414 *(u8 **)data = t->data.other_data.data.str.str;
1418 * drm_edid_to_eld - build ELD from EDID
1419 * @connector: connector corresponding to the HDMI/DP sink
1420 * @edid: EDID to parse
1422 * Fill the ELD (EDID-Like Data) buffer for passing to the audio driver.
1423 * Some ELD fields are left to the graphics driver caller:
1428 void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid)
1430 uint8_t *eld = connector->eld;
1438 memset(eld, 0, sizeof(connector->eld));
1440 cea = drm_find_cea_extension(edid);
1442 DRM_DEBUG_KMS("ELD: no CEA Extension found\n");
1447 drm_for_each_detailed_block((u8 *)edid, monitor_name, &name);
1448 for (mnl = 0; name && mnl < 13; mnl++) {
1449 if (name[mnl] == 0x0a)
1451 eld[20 + mnl] = name[mnl];
1453 eld[4] = (cea[1] << 5) | mnl;
1454 DRM_DEBUG_KMS("ELD monitor %s\n", eld + 20);
1456 eld[0] = 2 << 3; /* ELD version: 2 */
1458 eld[16] = edid->mfg_id[0];
1459 eld[17] = edid->mfg_id[1];
1460 eld[18] = edid->prod_code[0];
1461 eld[19] = edid->prod_code[1];
1463 for (db = cea + 4; db < cea + cea[2]; db += dbl + 1) {
1466 switch ((db[0] & 0xe0) >> 5) {
1467 case AUDIO_BLOCK: /* Audio Data Block, contains SADs */
1468 sad_count = dbl / 3;
1469 memcpy(eld + 20 + mnl, &db[1], dbl);
1471 case SPEAKER_BLOCK: /* Speaker Allocation Data Block */
1475 /* HDMI Vendor-Specific Data Block */
1476 if (db[1] == 0x03 && db[2] == 0x0c && db[3] == 0)
1477 parse_hdmi_vsdb(connector, db);
1483 eld[5] |= sad_count << 4;
1484 eld[2] = (20 + mnl + sad_count * 3 + 3) / 4;
1486 DRM_DEBUG_KMS("ELD size %d, SAD count %d\n", (int)eld[2], sad_count);
1488 EXPORT_SYMBOL(drm_edid_to_eld);
1491 * drm_av_sync_delay - HDMI/DP sink audio-video sync delay in millisecond
1492 * @connector: connector associated with the HDMI/DP sink
1493 * @mode: the display mode
1495 int drm_av_sync_delay(struct drm_connector *connector,
1496 struct drm_display_mode *mode)
1498 int i = !!(mode->flags & DRM_MODE_FLAG_INTERLACE);
1501 if (!connector->latency_present[0])
1503 if (!connector->latency_present[1])
1506 a = connector->audio_latency[i];
1507 v = connector->video_latency[i];
1510 * HDMI/DP sink doesn't support audio or video?
1512 if (a == 255 || v == 255)
1516 * Convert raw EDID values to millisecond.
1517 * Treat unknown latency as 0ms.
1520 a = min(2 * (a - 1), 500);
1522 v = min(2 * (v - 1), 500);
1524 return max(v - a, 0);
1526 EXPORT_SYMBOL(drm_av_sync_delay);
1529 * drm_select_eld - select one ELD from multiple HDMI/DP sinks
1530 * @encoder: the encoder just changed display mode
1531 * @mode: the adjusted display mode
1533 * It's possible for one encoder to be associated with multiple HDMI/DP sinks.
1534 * The policy is now hard coded to simply use the first HDMI/DP sink's ELD.
1536 struct drm_connector *drm_select_eld(struct drm_encoder *encoder,
1537 struct drm_display_mode *mode)
1539 struct drm_connector *connector;
1540 struct drm_device *dev = encoder->dev;
1542 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
1543 if (connector->encoder == encoder && connector->eld[0])
1548 EXPORT_SYMBOL(drm_select_eld);
1551 * drm_detect_hdmi_monitor - detect whether monitor is hdmi.
1552 * @edid: monitor EDID information
1554 * Parse the CEA extension according to CEA-861-B.
1555 * Return true if HDMI, false if not or unknown.
1557 bool drm_detect_hdmi_monitor(struct edid *edid)
1561 int start_offset, end_offset;
1562 bool is_hdmi = false;
1564 edid_ext = drm_find_cea_extension(edid);
1568 /* Data block offset in CEA extension block */
1570 end_offset = edid_ext[2];
1573 * Because HDMI identifier is in Vendor Specific Block,
1574 * search it from all data blocks of CEA extension.
1576 for (i = start_offset; i < end_offset;
1577 /* Increased by data block len */
1578 i += ((edid_ext[i] & 0x1f) + 1)) {
1579 /* Find vendor specific block */
1580 if ((edid_ext[i] >> 5) == VENDOR_BLOCK) {
1581 hdmi_id = edid_ext[i + 1] | (edid_ext[i + 2] << 8) |
1582 edid_ext[i + 3] << 16;
1583 /* Find HDMI identifier */
1584 if (hdmi_id == HDMI_IDENTIFIER)
1593 EXPORT_SYMBOL(drm_detect_hdmi_monitor);
1596 * drm_detect_monitor_audio - check monitor audio capability
1598 * Monitor should have CEA extension block.
1599 * If monitor has 'basic audio', but no CEA audio blocks, it's 'basic
1600 * audio' only. If there is any audio extension block and supported
1601 * audio format, assume at least 'basic audio' support, even if 'basic
1602 * audio' is not defined in EDID.
1605 bool drm_detect_monitor_audio(struct edid *edid)
1609 bool has_audio = false;
1610 int start_offset, end_offset;
1612 edid_ext = drm_find_cea_extension(edid);
1616 has_audio = ((edid_ext[3] & EDID_BASIC_AUDIO) != 0);
1619 DRM_DEBUG_KMS("Monitor has basic audio support\n");
1623 /* Data block offset in CEA extension block */
1625 end_offset = edid_ext[2];
1627 for (i = start_offset; i < end_offset;
1628 i += ((edid_ext[i] & 0x1f) + 1)) {
1629 if ((edid_ext[i] >> 5) == AUDIO_BLOCK) {
1631 for (j = 1; j < (edid_ext[i] & 0x1f); j += 3)
1632 DRM_DEBUG_KMS("CEA audio format %d\n",
1633 (edid_ext[i + j] >> 3) & 0xf);
1640 EXPORT_SYMBOL(drm_detect_monitor_audio);
1643 * drm_add_display_info - pull display info out if present
1645 * @info: display info (attached to connector)
1647 * Grab any available display info and stuff it into the drm_display_info
1648 * structure that's part of the connector. Useful for tracking bpp and
1651 static void drm_add_display_info(struct edid *edid,
1652 struct drm_display_info *info)
1656 info->width_mm = edid->width_cm * 10;
1657 info->height_mm = edid->height_cm * 10;
1659 /* driver figures it out in this case */
1661 info->color_formats = 0;
1663 /* Only defined for 1.4 with digital displays */
1664 if (edid->revision < 4)
1667 if (!(edid->input & DRM_EDID_INPUT_DIGITAL))
1670 switch (edid->input & DRM_EDID_DIGITAL_DEPTH_MASK) {
1671 case DRM_EDID_DIGITAL_DEPTH_6:
1674 case DRM_EDID_DIGITAL_DEPTH_8:
1677 case DRM_EDID_DIGITAL_DEPTH_10:
1680 case DRM_EDID_DIGITAL_DEPTH_12:
1683 case DRM_EDID_DIGITAL_DEPTH_14:
1686 case DRM_EDID_DIGITAL_DEPTH_16:
1689 case DRM_EDID_DIGITAL_DEPTH_UNDEF:
1695 info->color_formats = DRM_COLOR_FORMAT_RGB444;
1696 if (info->color_formats & DRM_EDID_FEATURE_RGB_YCRCB444)
1697 info->color_formats = DRM_COLOR_FORMAT_YCRCB444;
1698 if (info->color_formats & DRM_EDID_FEATURE_RGB_YCRCB422)
1699 info->color_formats = DRM_COLOR_FORMAT_YCRCB422;
1701 /* Get data from CEA blocks if present */
1702 edid_ext = drm_find_cea_extension(edid);
1706 info->cea_rev = edid_ext[1];
1710 * drm_add_edid_modes - add modes from EDID data, if available
1711 * @connector: connector we're probing
1714 * Add the specified modes to the connector's mode list.
1716 * Return number of modes added or 0 if we couldn't find any.
1718 int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid)
1726 if (!drm_edid_is_valid(edid)) {
1727 dev_warn(connector->dev->dev, "%s: EDID invalid.\n",
1728 drm_get_connector_name(connector));
1732 quirks = edid_get_quirks(edid);
1735 * EDID spec says modes should be preferred in this order:
1736 * - preferred detailed mode
1737 * - other detailed modes from base block
1738 * - detailed modes from extension blocks
1739 * - CVT 3-byte code modes
1740 * - standard timing codes
1741 * - established timing codes
1742 * - modes inferred from GTF or CVT range information
1744 * We get this pretty much right.
1746 * XXX order for additional mode types in extension blocks?
1748 num_modes += add_detailed_modes(connector, edid, quirks);
1749 num_modes += add_cvt_modes(connector, edid);
1750 num_modes += add_standard_modes(connector, edid);
1751 num_modes += add_established_modes(connector, edid);
1752 if (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF)
1753 num_modes += add_inferred_modes(connector, edid);
1755 if (quirks & (EDID_QUIRK_PREFER_LARGE_60 | EDID_QUIRK_PREFER_LARGE_75))
1756 edid_fixup_preferred(connector, quirks);
1758 drm_add_display_info(edid, &connector->display_info);
1760 if (quirks & EDID_QUIRK_FORCE_6BPC)
1761 connector->display_info.bpc = 6;
1765 EXPORT_SYMBOL(drm_add_edid_modes);
1768 * drm_add_modes_noedid - add modes for the connectors without EDID
1769 * @connector: connector we're probing
1770 * @hdisplay: the horizontal display limit
1771 * @vdisplay: the vertical display limit
1773 * Add the specified modes to the connector's mode list. Only when the
1774 * hdisplay/vdisplay is not beyond the given limit, it will be added.
1776 * Return number of modes added or 0 if we couldn't find any.
1778 int drm_add_modes_noedid(struct drm_connector *connector,
1779 int hdisplay, int vdisplay)
1781 int i, count, num_modes = 0;
1782 struct drm_display_mode *mode;
1783 struct drm_device *dev = connector->dev;
1785 count = sizeof(drm_dmt_modes) / sizeof(struct drm_display_mode);
1791 for (i = 0; i < count; i++) {
1792 const struct drm_display_mode *ptr = &drm_dmt_modes[i];
1793 if (hdisplay && vdisplay) {
1795 * Only when two are valid, they will be used to check
1796 * whether the mode should be added to the mode list of
1799 if (ptr->hdisplay > hdisplay ||
1800 ptr->vdisplay > vdisplay)
1803 if (drm_mode_vrefresh(ptr) > 61)
1805 mode = drm_mode_duplicate(dev, ptr);
1807 drm_mode_probed_add(connector, mode);
1813 EXPORT_SYMBOL(drm_add_modes_noedid);