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4a9a8b71e1
Some RS690 chipsets seem to end up with floating connectors, either a DVI connector isn't actually populated, or an add-in HDMI card is available but not installed. In this case we seem to get a NULL byte response for each byte of the i2c transaction, so we detect this case and if we see it we don't do anymore DDC transactions on this connector. I've tested this on my RS690 without the HDMI card installed and it seems to work fine. Signed-off-by: Dave Airlie <airlied@redhat.com> Reviewed-by: Alex Deucher <alexdeucher@gmail.com>
1589 lines
40 KiB
C
1589 lines
40 KiB
C
/*
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* Copyright (c) 2006 Luc Verhaegen (quirks list)
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* Copyright (c) 2007-2008 Intel Corporation
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* Jesse Barnes <jesse.barnes@intel.com>
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* Copyright 2010 Red Hat, Inc.
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*
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* DDC probing routines (drm_ddc_read & drm_do_probe_ddc_edid) originally from
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* FB layer.
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* Copyright (C) 2006 Dennis Munsie <dmunsie@cecropia.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sub license,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/i2c.h>
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#include "drmP.h"
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#include "drm_edid.h"
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#include "drm_edid_modes.h"
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#define version_greater(edid, maj, min) \
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(((edid)->version > (maj)) || \
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((edid)->version == (maj) && (edid)->revision > (min)))
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#define EDID_EST_TIMINGS 16
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#define EDID_STD_TIMINGS 8
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#define EDID_DETAILED_TIMINGS 4
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/*
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* EDID blocks out in the wild have a variety of bugs, try to collect
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* them here (note that userspace may work around broken monitors first,
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* but fixes should make their way here so that the kernel "just works"
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* on as many displays as possible).
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*/
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/* First detailed mode wrong, use largest 60Hz mode */
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#define EDID_QUIRK_PREFER_LARGE_60 (1 << 0)
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/* Reported 135MHz pixel clock is too high, needs adjustment */
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#define EDID_QUIRK_135_CLOCK_TOO_HIGH (1 << 1)
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/* Prefer the largest mode at 75 Hz */
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#define EDID_QUIRK_PREFER_LARGE_75 (1 << 2)
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/* Detail timing is in cm not mm */
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#define EDID_QUIRK_DETAILED_IN_CM (1 << 3)
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/* Detailed timing descriptors have bogus size values, so just take the
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* maximum size and use that.
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*/
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#define EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE (1 << 4)
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/* Monitor forgot to set the first detailed is preferred bit. */
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#define EDID_QUIRK_FIRST_DETAILED_PREFERRED (1 << 5)
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/* use +hsync +vsync for detailed mode */
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#define EDID_QUIRK_DETAILED_SYNC_PP (1 << 6)
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struct detailed_mode_closure {
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struct drm_connector *connector;
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struct edid *edid;
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bool preferred;
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u32 quirks;
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int modes;
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};
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#define LEVEL_DMT 0
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#define LEVEL_GTF 1
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#define LEVEL_GTF2 2
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#define LEVEL_CVT 3
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static struct edid_quirk {
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char *vendor;
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int product_id;
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u32 quirks;
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} edid_quirk_list[] = {
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/* Acer AL1706 */
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{ "ACR", 44358, EDID_QUIRK_PREFER_LARGE_60 },
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/* Acer F51 */
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{ "API", 0x7602, EDID_QUIRK_PREFER_LARGE_60 },
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/* Unknown Acer */
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{ "ACR", 2423, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
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/* Belinea 10 15 55 */
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{ "MAX", 1516, EDID_QUIRK_PREFER_LARGE_60 },
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{ "MAX", 0x77e, EDID_QUIRK_PREFER_LARGE_60 },
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/* Envision Peripherals, Inc. EN-7100e */
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{ "EPI", 59264, EDID_QUIRK_135_CLOCK_TOO_HIGH },
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/* Envision EN2028 */
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{ "EPI", 8232, EDID_QUIRK_PREFER_LARGE_60 },
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/* Funai Electronics PM36B */
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{ "FCM", 13600, EDID_QUIRK_PREFER_LARGE_75 |
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EDID_QUIRK_DETAILED_IN_CM },
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/* LG Philips LCD LP154W01-A5 */
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{ "LPL", 0, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE },
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{ "LPL", 0x2a00, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE },
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/* Philips 107p5 CRT */
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{ "PHL", 57364, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
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/* Proview AY765C */
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{ "PTS", 765, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
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/* Samsung SyncMaster 205BW. Note: irony */
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{ "SAM", 541, EDID_QUIRK_DETAILED_SYNC_PP },
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/* Samsung SyncMaster 22[5-6]BW */
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{ "SAM", 596, EDID_QUIRK_PREFER_LARGE_60 },
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{ "SAM", 638, EDID_QUIRK_PREFER_LARGE_60 },
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};
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/*** DDC fetch and block validation ***/
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static const u8 edid_header[] = {
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0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00
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};
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/*
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* Sanity check the EDID block (base or extension). Return 0 if the block
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* doesn't check out, or 1 if it's valid.
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*/
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static bool
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drm_edid_block_valid(u8 *raw_edid)
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{
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int i;
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u8 csum = 0;
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struct edid *edid = (struct edid *)raw_edid;
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if (raw_edid[0] == 0x00) {
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int score = 0;
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for (i = 0; i < sizeof(edid_header); i++)
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if (raw_edid[i] == edid_header[i])
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score++;
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if (score == 8) ;
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else if (score >= 6) {
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DRM_DEBUG("Fixing EDID header, your hardware may be failing\n");
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memcpy(raw_edid, edid_header, sizeof(edid_header));
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} else {
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goto bad;
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}
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}
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for (i = 0; i < EDID_LENGTH; i++)
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csum += raw_edid[i];
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if (csum) {
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DRM_ERROR("EDID checksum is invalid, remainder is %d\n", csum);
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/* allow CEA to slide through, switches mangle this */
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if (raw_edid[0] != 0x02)
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goto bad;
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}
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/* per-block-type checks */
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switch (raw_edid[0]) {
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case 0: /* base */
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if (edid->version != 1) {
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DRM_ERROR("EDID has major version %d, instead of 1\n", edid->version);
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goto bad;
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}
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if (edid->revision > 4)
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DRM_DEBUG("EDID minor > 4, assuming backward compatibility\n");
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break;
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default:
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break;
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}
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return 1;
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bad:
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if (raw_edid) {
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printk(KERN_ERR "Raw EDID:\n");
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print_hex_dump_bytes(KERN_ERR, DUMP_PREFIX_NONE, raw_edid, EDID_LENGTH);
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printk(KERN_ERR "\n");
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}
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return 0;
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}
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/**
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* drm_edid_is_valid - sanity check EDID data
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* @edid: EDID data
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*
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* Sanity-check an entire EDID record (including extensions)
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*/
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bool drm_edid_is_valid(struct edid *edid)
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{
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int i;
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u8 *raw = (u8 *)edid;
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if (!edid)
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return false;
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for (i = 0; i <= edid->extensions; i++)
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if (!drm_edid_block_valid(raw + i * EDID_LENGTH))
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return false;
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return true;
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}
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EXPORT_SYMBOL(drm_edid_is_valid);
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#define DDC_ADDR 0x50
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#define DDC_SEGMENT_ADDR 0x30
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/**
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* Get EDID information via I2C.
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*
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* \param adapter : i2c device adaptor
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* \param buf : EDID data buffer to be filled
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* \param len : EDID data buffer length
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* \return 0 on success or -1 on failure.
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*
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* Try to fetch EDID information by calling i2c driver function.
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*/
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static int
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drm_do_probe_ddc_edid(struct i2c_adapter *adapter, unsigned char *buf,
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int block, int len)
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{
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unsigned char start = block * EDID_LENGTH;
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int ret, retries = 5;
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/* The core i2c driver will automatically retry the transfer if the
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* adapter reports EAGAIN. However, we find that bit-banging transfers
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* are susceptible to errors under a heavily loaded machine and
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* generate spurious NAKs and timeouts. Retrying the transfer
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* of the individual block a few times seems to overcome this.
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*/
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do {
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struct i2c_msg msgs[] = {
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{
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.addr = DDC_ADDR,
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.flags = 0,
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.len = 1,
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.buf = &start,
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}, {
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.addr = DDC_ADDR,
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.flags = I2C_M_RD,
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.len = len,
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.buf = buf,
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}
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};
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ret = i2c_transfer(adapter, msgs, 2);
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} while (ret != 2 && --retries);
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return ret == 2 ? 0 : -1;
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}
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static bool drm_edid_is_zero(u8 *in_edid, int length)
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{
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int i;
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u32 *raw_edid = (u32 *)in_edid;
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for (i = 0; i < length / 4; i++)
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if (*(raw_edid + i) != 0)
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return false;
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return true;
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}
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static u8 *
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drm_do_get_edid(struct drm_connector *connector, struct i2c_adapter *adapter)
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{
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int i, j = 0, valid_extensions = 0;
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u8 *block, *new;
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if ((block = kmalloc(EDID_LENGTH, GFP_KERNEL)) == NULL)
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return NULL;
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/* base block fetch */
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for (i = 0; i < 4; i++) {
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if (drm_do_probe_ddc_edid(adapter, block, 0, EDID_LENGTH))
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goto out;
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if (drm_edid_block_valid(block))
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break;
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if (i == 0 && drm_edid_is_zero(block, EDID_LENGTH)) {
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connector->null_edid_counter++;
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goto carp;
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}
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}
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if (i == 4)
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goto carp;
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/* if there's no extensions, we're done */
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if (block[0x7e] == 0)
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return block;
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new = krealloc(block, (block[0x7e] + 1) * EDID_LENGTH, GFP_KERNEL);
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if (!new)
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goto out;
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block = new;
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for (j = 1; j <= block[0x7e]; j++) {
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for (i = 0; i < 4; i++) {
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if (drm_do_probe_ddc_edid(adapter,
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block + (valid_extensions + 1) * EDID_LENGTH,
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j, EDID_LENGTH))
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goto out;
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if (drm_edid_block_valid(block + (valid_extensions + 1) * EDID_LENGTH)) {
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valid_extensions++;
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break;
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}
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}
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if (i == 4)
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dev_warn(connector->dev->dev,
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"%s: Ignoring invalid EDID block %d.\n",
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drm_get_connector_name(connector), j);
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}
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if (valid_extensions != block[0x7e]) {
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block[EDID_LENGTH-1] += block[0x7e] - valid_extensions;
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block[0x7e] = valid_extensions;
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new = krealloc(block, (valid_extensions + 1) * EDID_LENGTH, GFP_KERNEL);
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if (!new)
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goto out;
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block = new;
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}
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return block;
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carp:
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dev_warn(connector->dev->dev, "%s: EDID block %d invalid.\n",
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drm_get_connector_name(connector), j);
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out:
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kfree(block);
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return NULL;
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}
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/**
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* Probe DDC presence.
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*
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* \param adapter : i2c device adaptor
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* \return 1 on success
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*/
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static bool
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drm_probe_ddc(struct i2c_adapter *adapter)
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{
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unsigned char out;
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return (drm_do_probe_ddc_edid(adapter, &out, 0, 1) == 0);
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}
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/**
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* drm_get_edid - get EDID data, if available
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* @connector: connector we're probing
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* @adapter: i2c adapter to use for DDC
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*
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* Poke the given i2c channel to grab EDID data if possible. If found,
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* attach it to the connector.
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*
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* Return edid data or NULL if we couldn't find any.
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*/
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struct edid *drm_get_edid(struct drm_connector *connector,
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struct i2c_adapter *adapter)
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{
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struct edid *edid = NULL;
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if (drm_probe_ddc(adapter))
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edid = (struct edid *)drm_do_get_edid(connector, adapter);
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connector->display_info.raw_edid = (char *)edid;
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return edid;
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}
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EXPORT_SYMBOL(drm_get_edid);
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/*** EDID parsing ***/
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/**
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* edid_vendor - match a string against EDID's obfuscated vendor field
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* @edid: EDID to match
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* @vendor: vendor string
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*
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* Returns true if @vendor is in @edid, false otherwise
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*/
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static bool edid_vendor(struct edid *edid, char *vendor)
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{
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char edid_vendor[3];
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edid_vendor[0] = ((edid->mfg_id[0] & 0x7c) >> 2) + '@';
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edid_vendor[1] = (((edid->mfg_id[0] & 0x3) << 3) |
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((edid->mfg_id[1] & 0xe0) >> 5)) + '@';
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edid_vendor[2] = (edid->mfg_id[1] & 0x1f) + '@';
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return !strncmp(edid_vendor, vendor, 3);
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}
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/**
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* edid_get_quirks - return quirk flags for a given EDID
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* @edid: EDID to process
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*
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* This tells subsequent routines what fixes they need to apply.
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*/
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static u32 edid_get_quirks(struct edid *edid)
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{
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struct edid_quirk *quirk;
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int i;
|
|
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for (i = 0; i < ARRAY_SIZE(edid_quirk_list); i++) {
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quirk = &edid_quirk_list[i];
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if (edid_vendor(edid, quirk->vendor) &&
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(EDID_PRODUCT_ID(edid) == quirk->product_id))
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return quirk->quirks;
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}
|
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|
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return 0;
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}
|
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|
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#define MODE_SIZE(m) ((m)->hdisplay * (m)->vdisplay)
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#define MODE_REFRESH_DIFF(m,r) (abs((m)->vrefresh - target_refresh))
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|
|
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/**
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* edid_fixup_preferred - set preferred modes based on quirk list
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* @connector: has mode list to fix up
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* @quirks: quirks list
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*
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* Walk the mode list for @connector, clearing the preferred status
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* on existing modes and setting it anew for the right mode ala @quirks.
|
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*/
|
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static void edid_fixup_preferred(struct drm_connector *connector,
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u32 quirks)
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{
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struct drm_display_mode *t, *cur_mode, *preferred_mode;
|
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int target_refresh = 0;
|
|
|
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if (list_empty(&connector->probed_modes))
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return;
|
|
|
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if (quirks & EDID_QUIRK_PREFER_LARGE_60)
|
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target_refresh = 60;
|
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if (quirks & EDID_QUIRK_PREFER_LARGE_75)
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target_refresh = 75;
|
|
|
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preferred_mode = list_first_entry(&connector->probed_modes,
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struct drm_display_mode, head);
|
|
|
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list_for_each_entry_safe(cur_mode, t, &connector->probed_modes, head) {
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cur_mode->type &= ~DRM_MODE_TYPE_PREFERRED;
|
|
|
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if (cur_mode == preferred_mode)
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continue;
|
|
|
|
/* Largest mode is preferred */
|
|
if (MODE_SIZE(cur_mode) > MODE_SIZE(preferred_mode))
|
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preferred_mode = cur_mode;
|
|
|
|
/* At a given size, try to get closest to target refresh */
|
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if ((MODE_SIZE(cur_mode) == MODE_SIZE(preferred_mode)) &&
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MODE_REFRESH_DIFF(cur_mode, target_refresh) <
|
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MODE_REFRESH_DIFF(preferred_mode, target_refresh)) {
|
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preferred_mode = cur_mode;
|
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}
|
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}
|
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|
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preferred_mode->type |= DRM_MODE_TYPE_PREFERRED;
|
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}
|
|
|
|
struct drm_display_mode *drm_mode_find_dmt(struct drm_device *dev,
|
|
int hsize, int vsize, int fresh)
|
|
{
|
|
struct drm_display_mode *mode = NULL;
|
|
int i;
|
|
|
|
for (i = 0; i < drm_num_dmt_modes; i++) {
|
|
const struct drm_display_mode *ptr = &drm_dmt_modes[i];
|
|
if (hsize == ptr->hdisplay &&
|
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vsize == ptr->vdisplay &&
|
|
fresh == drm_mode_vrefresh(ptr)) {
|
|
/* get the expected default mode */
|
|
mode = drm_mode_duplicate(dev, ptr);
|
|
break;
|
|
}
|
|
}
|
|
return mode;
|
|
}
|
|
EXPORT_SYMBOL(drm_mode_find_dmt);
|
|
|
|
typedef void detailed_cb(struct detailed_timing *timing, void *closure);
|
|
|
|
static void
|
|
cea_for_each_detailed_block(u8 *ext, detailed_cb *cb, void *closure)
|
|
{
|
|
int i, n = 0;
|
|
u8 rev = ext[0x01], d = ext[0x02];
|
|
u8 *det_base = ext + d;
|
|
|
|
switch (rev) {
|
|
case 0:
|
|
/* can't happen */
|
|
return;
|
|
case 1:
|
|
/* have to infer how many blocks we have, check pixel clock */
|
|
for (i = 0; i < 6; i++)
|
|
if (det_base[18*i] || det_base[18*i+1])
|
|
n++;
|
|
break;
|
|
default:
|
|
/* explicit count */
|
|
n = min(ext[0x03] & 0x0f, 6);
|
|
break;
|
|
}
|
|
|
|
for (i = 0; i < n; i++)
|
|
cb((struct detailed_timing *)(det_base + 18 * i), closure);
|
|
}
|
|
|
|
static void
|
|
vtb_for_each_detailed_block(u8 *ext, detailed_cb *cb, void *closure)
|
|
{
|
|
unsigned int i, n = min((int)ext[0x02], 6);
|
|
u8 *det_base = ext + 5;
|
|
|
|
if (ext[0x01] != 1)
|
|
return; /* unknown version */
|
|
|
|
for (i = 0; i < n; i++)
|
|
cb((struct detailed_timing *)(det_base + 18 * i), closure);
|
|
}
|
|
|
|
static void
|
|
drm_for_each_detailed_block(u8 *raw_edid, detailed_cb *cb, void *closure)
|
|
{
|
|
int i;
|
|
struct edid *edid = (struct edid *)raw_edid;
|
|
|
|
if (edid == NULL)
|
|
return;
|
|
|
|
for (i = 0; i < EDID_DETAILED_TIMINGS; i++)
|
|
cb(&(edid->detailed_timings[i]), closure);
|
|
|
|
for (i = 1; i <= raw_edid[0x7e]; i++) {
|
|
u8 *ext = raw_edid + (i * EDID_LENGTH);
|
|
switch (*ext) {
|
|
case CEA_EXT:
|
|
cea_for_each_detailed_block(ext, cb, closure);
|
|
break;
|
|
case VTB_EXT:
|
|
vtb_for_each_detailed_block(ext, cb, closure);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
is_rb(struct detailed_timing *t, void *data)
|
|
{
|
|
u8 *r = (u8 *)t;
|
|
if (r[3] == EDID_DETAIL_MONITOR_RANGE)
|
|
if (r[15] & 0x10)
|
|
*(bool *)data = true;
|
|
}
|
|
|
|
/* EDID 1.4 defines this explicitly. For EDID 1.3, we guess, badly. */
|
|
static bool
|
|
drm_monitor_supports_rb(struct edid *edid)
|
|
{
|
|
if (edid->revision >= 4) {
|
|
bool ret;
|
|
drm_for_each_detailed_block((u8 *)edid, is_rb, &ret);
|
|
return ret;
|
|
}
|
|
|
|
return ((edid->input & DRM_EDID_INPUT_DIGITAL) != 0);
|
|
}
|
|
|
|
static void
|
|
find_gtf2(struct detailed_timing *t, void *data)
|
|
{
|
|
u8 *r = (u8 *)t;
|
|
if (r[3] == EDID_DETAIL_MONITOR_RANGE && r[10] == 0x02)
|
|
*(u8 **)data = r;
|
|
}
|
|
|
|
/* Secondary GTF curve kicks in above some break frequency */
|
|
static int
|
|
drm_gtf2_hbreak(struct edid *edid)
|
|
{
|
|
u8 *r = NULL;
|
|
drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
|
|
return r ? (r[12] * 2) : 0;
|
|
}
|
|
|
|
static int
|
|
drm_gtf2_2c(struct edid *edid)
|
|
{
|
|
u8 *r = NULL;
|
|
drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
|
|
return r ? r[13] : 0;
|
|
}
|
|
|
|
static int
|
|
drm_gtf2_m(struct edid *edid)
|
|
{
|
|
u8 *r = NULL;
|
|
drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
|
|
return r ? (r[15] << 8) + r[14] : 0;
|
|
}
|
|
|
|
static int
|
|
drm_gtf2_k(struct edid *edid)
|
|
{
|
|
u8 *r = NULL;
|
|
drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
|
|
return r ? r[16] : 0;
|
|
}
|
|
|
|
static int
|
|
drm_gtf2_2j(struct edid *edid)
|
|
{
|
|
u8 *r = NULL;
|
|
drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
|
|
return r ? r[17] : 0;
|
|
}
|
|
|
|
/**
|
|
* standard_timing_level - get std. timing level(CVT/GTF/DMT)
|
|
* @edid: EDID block to scan
|
|
*/
|
|
static int standard_timing_level(struct edid *edid)
|
|
{
|
|
if (edid->revision >= 2) {
|
|
if (edid->revision >= 4 && (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF))
|
|
return LEVEL_CVT;
|
|
if (drm_gtf2_hbreak(edid))
|
|
return LEVEL_GTF2;
|
|
return LEVEL_GTF;
|
|
}
|
|
return LEVEL_DMT;
|
|
}
|
|
|
|
/*
|
|
* 0 is reserved. The spec says 0x01 fill for unused timings. Some old
|
|
* monitors fill with ascii space (0x20) instead.
|
|
*/
|
|
static int
|
|
bad_std_timing(u8 a, u8 b)
|
|
{
|
|
return (a == 0x00 && b == 0x00) ||
|
|
(a == 0x01 && b == 0x01) ||
|
|
(a == 0x20 && b == 0x20);
|
|
}
|
|
|
|
/**
|
|
* drm_mode_std - convert standard mode info (width, height, refresh) into mode
|
|
* @t: standard timing params
|
|
* @timing_level: standard timing level
|
|
*
|
|
* Take the standard timing params (in this case width, aspect, and refresh)
|
|
* and convert them into a real mode using CVT/GTF/DMT.
|
|
*/
|
|
static struct drm_display_mode *
|
|
drm_mode_std(struct drm_connector *connector, struct edid *edid,
|
|
struct std_timing *t, int revision)
|
|
{
|
|
struct drm_device *dev = connector->dev;
|
|
struct drm_display_mode *m, *mode = NULL;
|
|
int hsize, vsize;
|
|
int vrefresh_rate;
|
|
unsigned aspect_ratio = (t->vfreq_aspect & EDID_TIMING_ASPECT_MASK)
|
|
>> EDID_TIMING_ASPECT_SHIFT;
|
|
unsigned vfreq = (t->vfreq_aspect & EDID_TIMING_VFREQ_MASK)
|
|
>> EDID_TIMING_VFREQ_SHIFT;
|
|
int timing_level = standard_timing_level(edid);
|
|
|
|
if (bad_std_timing(t->hsize, t->vfreq_aspect))
|
|
return NULL;
|
|
|
|
/* According to the EDID spec, the hdisplay = hsize * 8 + 248 */
|
|
hsize = t->hsize * 8 + 248;
|
|
/* vrefresh_rate = vfreq + 60 */
|
|
vrefresh_rate = vfreq + 60;
|
|
/* the vdisplay is calculated based on the aspect ratio */
|
|
if (aspect_ratio == 0) {
|
|
if (revision < 3)
|
|
vsize = hsize;
|
|
else
|
|
vsize = (hsize * 10) / 16;
|
|
} else if (aspect_ratio == 1)
|
|
vsize = (hsize * 3) / 4;
|
|
else if (aspect_ratio == 2)
|
|
vsize = (hsize * 4) / 5;
|
|
else
|
|
vsize = (hsize * 9) / 16;
|
|
|
|
/* HDTV hack, part 1 */
|
|
if (vrefresh_rate == 60 &&
|
|
((hsize == 1360 && vsize == 765) ||
|
|
(hsize == 1368 && vsize == 769))) {
|
|
hsize = 1366;
|
|
vsize = 768;
|
|
}
|
|
|
|
/*
|
|
* If this connector already has a mode for this size and refresh
|
|
* rate (because it came from detailed or CVT info), use that
|
|
* instead. This way we don't have to guess at interlace or
|
|
* reduced blanking.
|
|
*/
|
|
list_for_each_entry(m, &connector->probed_modes, head)
|
|
if (m->hdisplay == hsize && m->vdisplay == vsize &&
|
|
drm_mode_vrefresh(m) == vrefresh_rate)
|
|
return NULL;
|
|
|
|
/* HDTV hack, part 2 */
|
|
if (hsize == 1366 && vsize == 768 && vrefresh_rate == 60) {
|
|
mode = drm_cvt_mode(dev, 1366, 768, vrefresh_rate, 0, 0,
|
|
false);
|
|
mode->hdisplay = 1366;
|
|
mode->hsync_start = mode->hsync_start - 1;
|
|
mode->hsync_end = mode->hsync_end - 1;
|
|
return mode;
|
|
}
|
|
|
|
/* check whether it can be found in default mode table */
|
|
mode = drm_mode_find_dmt(dev, hsize, vsize, vrefresh_rate);
|
|
if (mode)
|
|
return mode;
|
|
|
|
switch (timing_level) {
|
|
case LEVEL_DMT:
|
|
break;
|
|
case LEVEL_GTF:
|
|
mode = drm_gtf_mode(dev, hsize, vsize, vrefresh_rate, 0, 0);
|
|
break;
|
|
case LEVEL_GTF2:
|
|
/*
|
|
* This is potentially wrong if there's ever a monitor with
|
|
* more than one ranges section, each claiming a different
|
|
* secondary GTF curve. Please don't do that.
|
|
*/
|
|
mode = drm_gtf_mode(dev, hsize, vsize, vrefresh_rate, 0, 0);
|
|
if (drm_mode_hsync(mode) > drm_gtf2_hbreak(edid)) {
|
|
kfree(mode);
|
|
mode = drm_gtf_mode_complex(dev, hsize, vsize,
|
|
vrefresh_rate, 0, 0,
|
|
drm_gtf2_m(edid),
|
|
drm_gtf2_2c(edid),
|
|
drm_gtf2_k(edid),
|
|
drm_gtf2_2j(edid));
|
|
}
|
|
break;
|
|
case LEVEL_CVT:
|
|
mode = drm_cvt_mode(dev, hsize, vsize, vrefresh_rate, 0, 0,
|
|
false);
|
|
break;
|
|
}
|
|
return mode;
|
|
}
|
|
|
|
/*
|
|
* EDID is delightfully ambiguous about how interlaced modes are to be
|
|
* encoded. Our internal representation is of frame height, but some
|
|
* HDTV detailed timings are encoded as field height.
|
|
*
|
|
* The format list here is from CEA, in frame size. Technically we
|
|
* should be checking refresh rate too. Whatever.
|
|
*/
|
|
static void
|
|
drm_mode_do_interlace_quirk(struct drm_display_mode *mode,
|
|
struct detailed_pixel_timing *pt)
|
|
{
|
|
int i;
|
|
static const struct {
|
|
int w, h;
|
|
} cea_interlaced[] = {
|
|
{ 1920, 1080 },
|
|
{ 720, 480 },
|
|
{ 1440, 480 },
|
|
{ 2880, 480 },
|
|
{ 720, 576 },
|
|
{ 1440, 576 },
|
|
{ 2880, 576 },
|
|
};
|
|
|
|
if (!(pt->misc & DRM_EDID_PT_INTERLACED))
|
|
return;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(cea_interlaced); i++) {
|
|
if ((mode->hdisplay == cea_interlaced[i].w) &&
|
|
(mode->vdisplay == cea_interlaced[i].h / 2)) {
|
|
mode->vdisplay *= 2;
|
|
mode->vsync_start *= 2;
|
|
mode->vsync_end *= 2;
|
|
mode->vtotal *= 2;
|
|
mode->vtotal |= 1;
|
|
}
|
|
}
|
|
|
|
mode->flags |= DRM_MODE_FLAG_INTERLACE;
|
|
}
|
|
|
|
/**
|
|
* drm_mode_detailed - create a new mode from an EDID detailed timing section
|
|
* @dev: DRM device (needed to create new mode)
|
|
* @edid: EDID block
|
|
* @timing: EDID detailed timing info
|
|
* @quirks: quirks to apply
|
|
*
|
|
* An EDID detailed timing block contains enough info for us to create and
|
|
* return a new struct drm_display_mode.
|
|
*/
|
|
static struct drm_display_mode *drm_mode_detailed(struct drm_device *dev,
|
|
struct edid *edid,
|
|
struct detailed_timing *timing,
|
|
u32 quirks)
|
|
{
|
|
struct drm_display_mode *mode;
|
|
struct detailed_pixel_timing *pt = &timing->data.pixel_data;
|
|
unsigned hactive = (pt->hactive_hblank_hi & 0xf0) << 4 | pt->hactive_lo;
|
|
unsigned vactive = (pt->vactive_vblank_hi & 0xf0) << 4 | pt->vactive_lo;
|
|
unsigned hblank = (pt->hactive_hblank_hi & 0xf) << 8 | pt->hblank_lo;
|
|
unsigned vblank = (pt->vactive_vblank_hi & 0xf) << 8 | pt->vblank_lo;
|
|
unsigned hsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc0) << 2 | pt->hsync_offset_lo;
|
|
unsigned hsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x30) << 4 | pt->hsync_pulse_width_lo;
|
|
unsigned vsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc) >> 2 | pt->vsync_offset_pulse_width_lo >> 4;
|
|
unsigned vsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x3) << 4 | (pt->vsync_offset_pulse_width_lo & 0xf);
|
|
|
|
/* ignore tiny modes */
|
|
if (hactive < 64 || vactive < 64)
|
|
return NULL;
|
|
|
|
if (pt->misc & DRM_EDID_PT_STEREO) {
|
|
printk(KERN_WARNING "stereo mode not supported\n");
|
|
return NULL;
|
|
}
|
|
if (!(pt->misc & DRM_EDID_PT_SEPARATE_SYNC)) {
|
|
printk(KERN_WARNING "composite sync not supported\n");
|
|
}
|
|
|
|
/* it is incorrect if hsync/vsync width is zero */
|
|
if (!hsync_pulse_width || !vsync_pulse_width) {
|
|
DRM_DEBUG_KMS("Incorrect Detailed timing. "
|
|
"Wrong Hsync/Vsync pulse width\n");
|
|
return NULL;
|
|
}
|
|
mode = drm_mode_create(dev);
|
|
if (!mode)
|
|
return NULL;
|
|
|
|
mode->type = DRM_MODE_TYPE_DRIVER;
|
|
|
|
if (quirks & EDID_QUIRK_135_CLOCK_TOO_HIGH)
|
|
timing->pixel_clock = cpu_to_le16(1088);
|
|
|
|
mode->clock = le16_to_cpu(timing->pixel_clock) * 10;
|
|
|
|
mode->hdisplay = hactive;
|
|
mode->hsync_start = mode->hdisplay + hsync_offset;
|
|
mode->hsync_end = mode->hsync_start + hsync_pulse_width;
|
|
mode->htotal = mode->hdisplay + hblank;
|
|
|
|
mode->vdisplay = vactive;
|
|
mode->vsync_start = mode->vdisplay + vsync_offset;
|
|
mode->vsync_end = mode->vsync_start + vsync_pulse_width;
|
|
mode->vtotal = mode->vdisplay + vblank;
|
|
|
|
/* Some EDIDs have bogus h/vtotal values */
|
|
if (mode->hsync_end > mode->htotal)
|
|
mode->htotal = mode->hsync_end + 1;
|
|
if (mode->vsync_end > mode->vtotal)
|
|
mode->vtotal = mode->vsync_end + 1;
|
|
|
|
drm_mode_do_interlace_quirk(mode, pt);
|
|
|
|
drm_mode_set_name(mode);
|
|
|
|
if (quirks & EDID_QUIRK_DETAILED_SYNC_PP) {
|
|
pt->misc |= DRM_EDID_PT_HSYNC_POSITIVE | DRM_EDID_PT_VSYNC_POSITIVE;
|
|
}
|
|
|
|
mode->flags |= (pt->misc & DRM_EDID_PT_HSYNC_POSITIVE) ?
|
|
DRM_MODE_FLAG_PHSYNC : DRM_MODE_FLAG_NHSYNC;
|
|
mode->flags |= (pt->misc & DRM_EDID_PT_VSYNC_POSITIVE) ?
|
|
DRM_MODE_FLAG_PVSYNC : DRM_MODE_FLAG_NVSYNC;
|
|
|
|
mode->width_mm = pt->width_mm_lo | (pt->width_height_mm_hi & 0xf0) << 4;
|
|
mode->height_mm = pt->height_mm_lo | (pt->width_height_mm_hi & 0xf) << 8;
|
|
|
|
if (quirks & EDID_QUIRK_DETAILED_IN_CM) {
|
|
mode->width_mm *= 10;
|
|
mode->height_mm *= 10;
|
|
}
|
|
|
|
if (quirks & EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE) {
|
|
mode->width_mm = edid->width_cm * 10;
|
|
mode->height_mm = edid->height_cm * 10;
|
|
}
|
|
|
|
return mode;
|
|
}
|
|
|
|
static bool
|
|
mode_is_rb(const struct drm_display_mode *mode)
|
|
{
|
|
return (mode->htotal - mode->hdisplay == 160) &&
|
|
(mode->hsync_end - mode->hdisplay == 80) &&
|
|
(mode->hsync_end - mode->hsync_start == 32) &&
|
|
(mode->vsync_start - mode->vdisplay == 3);
|
|
}
|
|
|
|
static bool
|
|
mode_in_hsync_range(const struct drm_display_mode *mode,
|
|
struct edid *edid, u8 *t)
|
|
{
|
|
int hsync, hmin, hmax;
|
|
|
|
hmin = t[7];
|
|
if (edid->revision >= 4)
|
|
hmin += ((t[4] & 0x04) ? 255 : 0);
|
|
hmax = t[8];
|
|
if (edid->revision >= 4)
|
|
hmax += ((t[4] & 0x08) ? 255 : 0);
|
|
hsync = drm_mode_hsync(mode);
|
|
|
|
return (hsync <= hmax && hsync >= hmin);
|
|
}
|
|
|
|
static bool
|
|
mode_in_vsync_range(const struct drm_display_mode *mode,
|
|
struct edid *edid, u8 *t)
|
|
{
|
|
int vsync, vmin, vmax;
|
|
|
|
vmin = t[5];
|
|
if (edid->revision >= 4)
|
|
vmin += ((t[4] & 0x01) ? 255 : 0);
|
|
vmax = t[6];
|
|
if (edid->revision >= 4)
|
|
vmax += ((t[4] & 0x02) ? 255 : 0);
|
|
vsync = drm_mode_vrefresh(mode);
|
|
|
|
return (vsync <= vmax && vsync >= vmin);
|
|
}
|
|
|
|
static u32
|
|
range_pixel_clock(struct edid *edid, u8 *t)
|
|
{
|
|
/* unspecified */
|
|
if (t[9] == 0 || t[9] == 255)
|
|
return 0;
|
|
|
|
/* 1.4 with CVT support gives us real precision, yay */
|
|
if (edid->revision >= 4 && t[10] == 0x04)
|
|
return (t[9] * 10000) - ((t[12] >> 2) * 250);
|
|
|
|
/* 1.3 is pathetic, so fuzz up a bit */
|
|
return t[9] * 10000 + 5001;
|
|
}
|
|
|
|
static bool
|
|
mode_in_range(const struct drm_display_mode *mode, struct edid *edid,
|
|
struct detailed_timing *timing)
|
|
{
|
|
u32 max_clock;
|
|
u8 *t = (u8 *)timing;
|
|
|
|
if (!mode_in_hsync_range(mode, edid, t))
|
|
return false;
|
|
|
|
if (!mode_in_vsync_range(mode, edid, t))
|
|
return false;
|
|
|
|
if ((max_clock = range_pixel_clock(edid, t)))
|
|
if (mode->clock > max_clock)
|
|
return false;
|
|
|
|
/* 1.4 max horizontal check */
|
|
if (edid->revision >= 4 && t[10] == 0x04)
|
|
if (t[13] && mode->hdisplay > 8 * (t[13] + (256 * (t[12]&0x3))))
|
|
return false;
|
|
|
|
if (mode_is_rb(mode) && !drm_monitor_supports_rb(edid))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
/*
|
|
* XXX If drm_dmt_modes ever regrows the CVT-R modes (and it will) this will
|
|
* need to account for them.
|
|
*/
|
|
static int
|
|
drm_gtf_modes_for_range(struct drm_connector *connector, struct edid *edid,
|
|
struct detailed_timing *timing)
|
|
{
|
|
int i, modes = 0;
|
|
struct drm_display_mode *newmode;
|
|
struct drm_device *dev = connector->dev;
|
|
|
|
for (i = 0; i < drm_num_dmt_modes; i++) {
|
|
if (mode_in_range(drm_dmt_modes + i, edid, timing)) {
|
|
newmode = drm_mode_duplicate(dev, &drm_dmt_modes[i]);
|
|
if (newmode) {
|
|
drm_mode_probed_add(connector, newmode);
|
|
modes++;
|
|
}
|
|
}
|
|
}
|
|
|
|
return modes;
|
|
}
|
|
|
|
static void
|
|
do_inferred_modes(struct detailed_timing *timing, void *c)
|
|
{
|
|
struct detailed_mode_closure *closure = c;
|
|
struct detailed_non_pixel *data = &timing->data.other_data;
|
|
int gtf = (closure->edid->features & DRM_EDID_FEATURE_DEFAULT_GTF);
|
|
|
|
if (gtf && data->type == EDID_DETAIL_MONITOR_RANGE)
|
|
closure->modes += drm_gtf_modes_for_range(closure->connector,
|
|
closure->edid,
|
|
timing);
|
|
}
|
|
|
|
static int
|
|
add_inferred_modes(struct drm_connector *connector, struct edid *edid)
|
|
{
|
|
struct detailed_mode_closure closure = {
|
|
connector, edid, 0, 0, 0
|
|
};
|
|
|
|
if (version_greater(edid, 1, 0))
|
|
drm_for_each_detailed_block((u8 *)edid, do_inferred_modes,
|
|
&closure);
|
|
|
|
return closure.modes;
|
|
}
|
|
|
|
static int
|
|
drm_est3_modes(struct drm_connector *connector, struct detailed_timing *timing)
|
|
{
|
|
int i, j, m, modes = 0;
|
|
struct drm_display_mode *mode;
|
|
u8 *est = ((u8 *)timing) + 5;
|
|
|
|
for (i = 0; i < 6; i++) {
|
|
for (j = 7; j > 0; j--) {
|
|
m = (i * 8) + (7 - j);
|
|
if (m >= ARRAY_SIZE(est3_modes))
|
|
break;
|
|
if (est[i] & (1 << j)) {
|
|
mode = drm_mode_find_dmt(connector->dev,
|
|
est3_modes[m].w,
|
|
est3_modes[m].h,
|
|
est3_modes[m].r
|
|
/*, est3_modes[m].rb */);
|
|
if (mode) {
|
|
drm_mode_probed_add(connector, mode);
|
|
modes++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return modes;
|
|
}
|
|
|
|
static void
|
|
do_established_modes(struct detailed_timing *timing, void *c)
|
|
{
|
|
struct detailed_mode_closure *closure = c;
|
|
struct detailed_non_pixel *data = &timing->data.other_data;
|
|
|
|
if (data->type == EDID_DETAIL_EST_TIMINGS)
|
|
closure->modes += drm_est3_modes(closure->connector, timing);
|
|
}
|
|
|
|
/**
|
|
* add_established_modes - get est. modes from EDID and add them
|
|
* @edid: EDID block to scan
|
|
*
|
|
* Each EDID block contains a bitmap of the supported "established modes" list
|
|
* (defined above). Tease them out and add them to the global modes list.
|
|
*/
|
|
static int
|
|
add_established_modes(struct drm_connector *connector, struct edid *edid)
|
|
{
|
|
struct drm_device *dev = connector->dev;
|
|
unsigned long est_bits = edid->established_timings.t1 |
|
|
(edid->established_timings.t2 << 8) |
|
|
((edid->established_timings.mfg_rsvd & 0x80) << 9);
|
|
int i, modes = 0;
|
|
struct detailed_mode_closure closure = {
|
|
connector, edid, 0, 0, 0
|
|
};
|
|
|
|
for (i = 0; i <= EDID_EST_TIMINGS; i++) {
|
|
if (est_bits & (1<<i)) {
|
|
struct drm_display_mode *newmode;
|
|
newmode = drm_mode_duplicate(dev, &edid_est_modes[i]);
|
|
if (newmode) {
|
|
drm_mode_probed_add(connector, newmode);
|
|
modes++;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (version_greater(edid, 1, 0))
|
|
drm_for_each_detailed_block((u8 *)edid,
|
|
do_established_modes, &closure);
|
|
|
|
return modes + closure.modes;
|
|
}
|
|
|
|
static void
|
|
do_standard_modes(struct detailed_timing *timing, void *c)
|
|
{
|
|
struct detailed_mode_closure *closure = c;
|
|
struct detailed_non_pixel *data = &timing->data.other_data;
|
|
struct drm_connector *connector = closure->connector;
|
|
struct edid *edid = closure->edid;
|
|
|
|
if (data->type == EDID_DETAIL_STD_MODES) {
|
|
int i;
|
|
for (i = 0; i < 6; i++) {
|
|
struct std_timing *std;
|
|
struct drm_display_mode *newmode;
|
|
|
|
std = &data->data.timings[i];
|
|
newmode = drm_mode_std(connector, edid, std,
|
|
edid->revision);
|
|
if (newmode) {
|
|
drm_mode_probed_add(connector, newmode);
|
|
closure->modes++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* add_standard_modes - get std. modes from EDID and add them
|
|
* @edid: EDID block to scan
|
|
*
|
|
* Standard modes can be calculated using the appropriate standard (DMT,
|
|
* GTF or CVT. Grab them from @edid and add them to the list.
|
|
*/
|
|
static int
|
|
add_standard_modes(struct drm_connector *connector, struct edid *edid)
|
|
{
|
|
int i, modes = 0;
|
|
struct detailed_mode_closure closure = {
|
|
connector, edid, 0, 0, 0
|
|
};
|
|
|
|
for (i = 0; i < EDID_STD_TIMINGS; i++) {
|
|
struct drm_display_mode *newmode;
|
|
|
|
newmode = drm_mode_std(connector, edid,
|
|
&edid->standard_timings[i],
|
|
edid->revision);
|
|
if (newmode) {
|
|
drm_mode_probed_add(connector, newmode);
|
|
modes++;
|
|
}
|
|
}
|
|
|
|
if (version_greater(edid, 1, 0))
|
|
drm_for_each_detailed_block((u8 *)edid, do_standard_modes,
|
|
&closure);
|
|
|
|
/* XXX should also look for standard codes in VTB blocks */
|
|
|
|
return modes + closure.modes;
|
|
}
|
|
|
|
static int drm_cvt_modes(struct drm_connector *connector,
|
|
struct detailed_timing *timing)
|
|
{
|
|
int i, j, modes = 0;
|
|
struct drm_display_mode *newmode;
|
|
struct drm_device *dev = connector->dev;
|
|
struct cvt_timing *cvt;
|
|
const int rates[] = { 60, 85, 75, 60, 50 };
|
|
const u8 empty[3] = { 0, 0, 0 };
|
|
|
|
for (i = 0; i < 4; i++) {
|
|
int uninitialized_var(width), height;
|
|
cvt = &(timing->data.other_data.data.cvt[i]);
|
|
|
|
if (!memcmp(cvt->code, empty, 3))
|
|
continue;
|
|
|
|
height = (cvt->code[0] + ((cvt->code[1] & 0xf0) << 4) + 1) * 2;
|
|
switch (cvt->code[1] & 0x0c) {
|
|
case 0x00:
|
|
width = height * 4 / 3;
|
|
break;
|
|
case 0x04:
|
|
width = height * 16 / 9;
|
|
break;
|
|
case 0x08:
|
|
width = height * 16 / 10;
|
|
break;
|
|
case 0x0c:
|
|
width = height * 15 / 9;
|
|
break;
|
|
}
|
|
|
|
for (j = 1; j < 5; j++) {
|
|
if (cvt->code[2] & (1 << j)) {
|
|
newmode = drm_cvt_mode(dev, width, height,
|
|
rates[j], j == 0,
|
|
false, false);
|
|
if (newmode) {
|
|
drm_mode_probed_add(connector, newmode);
|
|
modes++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return modes;
|
|
}
|
|
|
|
static void
|
|
do_cvt_mode(struct detailed_timing *timing, void *c)
|
|
{
|
|
struct detailed_mode_closure *closure = c;
|
|
struct detailed_non_pixel *data = &timing->data.other_data;
|
|
|
|
if (data->type == EDID_DETAIL_CVT_3BYTE)
|
|
closure->modes += drm_cvt_modes(closure->connector, timing);
|
|
}
|
|
|
|
static int
|
|
add_cvt_modes(struct drm_connector *connector, struct edid *edid)
|
|
{
|
|
struct detailed_mode_closure closure = {
|
|
connector, edid, 0, 0, 0
|
|
};
|
|
|
|
if (version_greater(edid, 1, 2))
|
|
drm_for_each_detailed_block((u8 *)edid, do_cvt_mode, &closure);
|
|
|
|
/* XXX should also look for CVT codes in VTB blocks */
|
|
|
|
return closure.modes;
|
|
}
|
|
|
|
static void
|
|
do_detailed_mode(struct detailed_timing *timing, void *c)
|
|
{
|
|
struct detailed_mode_closure *closure = c;
|
|
struct drm_display_mode *newmode;
|
|
|
|
if (timing->pixel_clock) {
|
|
newmode = drm_mode_detailed(closure->connector->dev,
|
|
closure->edid, timing,
|
|
closure->quirks);
|
|
if (!newmode)
|
|
return;
|
|
|
|
if (closure->preferred)
|
|
newmode->type |= DRM_MODE_TYPE_PREFERRED;
|
|
|
|
drm_mode_probed_add(closure->connector, newmode);
|
|
closure->modes++;
|
|
closure->preferred = 0;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* add_detailed_modes - Add modes from detailed timings
|
|
* @connector: attached connector
|
|
* @edid: EDID block to scan
|
|
* @quirks: quirks to apply
|
|
*/
|
|
static int
|
|
add_detailed_modes(struct drm_connector *connector, struct edid *edid,
|
|
u32 quirks)
|
|
{
|
|
struct detailed_mode_closure closure = {
|
|
connector,
|
|
edid,
|
|
1,
|
|
quirks,
|
|
0
|
|
};
|
|
|
|
if (closure.preferred && !version_greater(edid, 1, 3))
|
|
closure.preferred =
|
|
(edid->features & DRM_EDID_FEATURE_PREFERRED_TIMING);
|
|
|
|
drm_for_each_detailed_block((u8 *)edid, do_detailed_mode, &closure);
|
|
|
|
return closure.modes;
|
|
}
|
|
|
|
#define HDMI_IDENTIFIER 0x000C03
|
|
#define AUDIO_BLOCK 0x01
|
|
#define VENDOR_BLOCK 0x03
|
|
#define EDID_BASIC_AUDIO (1 << 6)
|
|
|
|
/**
|
|
* Search EDID for CEA extension block.
|
|
*/
|
|
u8 *drm_find_cea_extension(struct edid *edid)
|
|
{
|
|
u8 *edid_ext = NULL;
|
|
int i;
|
|
|
|
/* No EDID or EDID extensions */
|
|
if (edid == NULL || edid->extensions == 0)
|
|
return NULL;
|
|
|
|
/* Find CEA extension */
|
|
for (i = 0; i < edid->extensions; i++) {
|
|
edid_ext = (u8 *)edid + EDID_LENGTH * (i + 1);
|
|
if (edid_ext[0] == CEA_EXT)
|
|
break;
|
|
}
|
|
|
|
if (i == edid->extensions)
|
|
return NULL;
|
|
|
|
return edid_ext;
|
|
}
|
|
EXPORT_SYMBOL(drm_find_cea_extension);
|
|
|
|
/**
|
|
* drm_detect_hdmi_monitor - detect whether monitor is hdmi.
|
|
* @edid: monitor EDID information
|
|
*
|
|
* Parse the CEA extension according to CEA-861-B.
|
|
* Return true if HDMI, false if not or unknown.
|
|
*/
|
|
bool drm_detect_hdmi_monitor(struct edid *edid)
|
|
{
|
|
u8 *edid_ext;
|
|
int i, hdmi_id;
|
|
int start_offset, end_offset;
|
|
bool is_hdmi = false;
|
|
|
|
edid_ext = drm_find_cea_extension(edid);
|
|
if (!edid_ext)
|
|
goto end;
|
|
|
|
/* Data block offset in CEA extension block */
|
|
start_offset = 4;
|
|
end_offset = edid_ext[2];
|
|
|
|
/*
|
|
* Because HDMI identifier is in Vendor Specific Block,
|
|
* search it from all data blocks of CEA extension.
|
|
*/
|
|
for (i = start_offset; i < end_offset;
|
|
/* Increased by data block len */
|
|
i += ((edid_ext[i] & 0x1f) + 1)) {
|
|
/* Find vendor specific block */
|
|
if ((edid_ext[i] >> 5) == VENDOR_BLOCK) {
|
|
hdmi_id = edid_ext[i + 1] | (edid_ext[i + 2] << 8) |
|
|
edid_ext[i + 3] << 16;
|
|
/* Find HDMI identifier */
|
|
if (hdmi_id == HDMI_IDENTIFIER)
|
|
is_hdmi = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
end:
|
|
return is_hdmi;
|
|
}
|
|
EXPORT_SYMBOL(drm_detect_hdmi_monitor);
|
|
|
|
/**
|
|
* drm_detect_monitor_audio - check monitor audio capability
|
|
*
|
|
* Monitor should have CEA extension block.
|
|
* If monitor has 'basic audio', but no CEA audio blocks, it's 'basic
|
|
* audio' only. If there is any audio extension block and supported
|
|
* audio format, assume at least 'basic audio' support, even if 'basic
|
|
* audio' is not defined in EDID.
|
|
*
|
|
*/
|
|
bool drm_detect_monitor_audio(struct edid *edid)
|
|
{
|
|
u8 *edid_ext;
|
|
int i, j;
|
|
bool has_audio = false;
|
|
int start_offset, end_offset;
|
|
|
|
edid_ext = drm_find_cea_extension(edid);
|
|
if (!edid_ext)
|
|
goto end;
|
|
|
|
has_audio = ((edid_ext[3] & EDID_BASIC_AUDIO) != 0);
|
|
|
|
if (has_audio) {
|
|
DRM_DEBUG_KMS("Monitor has basic audio support\n");
|
|
goto end;
|
|
}
|
|
|
|
/* Data block offset in CEA extension block */
|
|
start_offset = 4;
|
|
end_offset = edid_ext[2];
|
|
|
|
for (i = start_offset; i < end_offset;
|
|
i += ((edid_ext[i] & 0x1f) + 1)) {
|
|
if ((edid_ext[i] >> 5) == AUDIO_BLOCK) {
|
|
has_audio = true;
|
|
for (j = 1; j < (edid_ext[i] & 0x1f); j += 3)
|
|
DRM_DEBUG_KMS("CEA audio format %d\n",
|
|
(edid_ext[i + j] >> 3) & 0xf);
|
|
goto end;
|
|
}
|
|
}
|
|
end:
|
|
return has_audio;
|
|
}
|
|
EXPORT_SYMBOL(drm_detect_monitor_audio);
|
|
|
|
/**
|
|
* drm_add_display_info - pull display info out if present
|
|
* @edid: EDID data
|
|
* @info: display info (attached to connector)
|
|
*
|
|
* Grab any available display info and stuff it into the drm_display_info
|
|
* structure that's part of the connector. Useful for tracking bpp and
|
|
* color spaces.
|
|
*/
|
|
static void drm_add_display_info(struct edid *edid,
|
|
struct drm_display_info *info)
|
|
{
|
|
info->width_mm = edid->width_cm * 10;
|
|
info->height_mm = edid->height_cm * 10;
|
|
|
|
/* driver figures it out in this case */
|
|
info->bpc = 0;
|
|
info->color_formats = 0;
|
|
|
|
/* Only defined for 1.4 with digital displays */
|
|
if (edid->revision < 4)
|
|
return;
|
|
|
|
if (!(edid->input & DRM_EDID_INPUT_DIGITAL))
|
|
return;
|
|
|
|
switch (edid->input & DRM_EDID_DIGITAL_DEPTH_MASK) {
|
|
case DRM_EDID_DIGITAL_DEPTH_6:
|
|
info->bpc = 6;
|
|
break;
|
|
case DRM_EDID_DIGITAL_DEPTH_8:
|
|
info->bpc = 8;
|
|
break;
|
|
case DRM_EDID_DIGITAL_DEPTH_10:
|
|
info->bpc = 10;
|
|
break;
|
|
case DRM_EDID_DIGITAL_DEPTH_12:
|
|
info->bpc = 12;
|
|
break;
|
|
case DRM_EDID_DIGITAL_DEPTH_14:
|
|
info->bpc = 14;
|
|
break;
|
|
case DRM_EDID_DIGITAL_DEPTH_16:
|
|
info->bpc = 16;
|
|
break;
|
|
case DRM_EDID_DIGITAL_DEPTH_UNDEF:
|
|
default:
|
|
info->bpc = 0;
|
|
break;
|
|
}
|
|
|
|
info->color_formats = DRM_COLOR_FORMAT_RGB444;
|
|
if (info->color_formats & DRM_EDID_FEATURE_RGB_YCRCB444)
|
|
info->color_formats = DRM_COLOR_FORMAT_YCRCB444;
|
|
if (info->color_formats & DRM_EDID_FEATURE_RGB_YCRCB422)
|
|
info->color_formats = DRM_COLOR_FORMAT_YCRCB422;
|
|
}
|
|
|
|
/**
|
|
* drm_add_edid_modes - add modes from EDID data, if available
|
|
* @connector: connector we're probing
|
|
* @edid: edid data
|
|
*
|
|
* Add the specified modes to the connector's mode list.
|
|
*
|
|
* Return number of modes added or 0 if we couldn't find any.
|
|
*/
|
|
int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid)
|
|
{
|
|
int num_modes = 0;
|
|
u32 quirks;
|
|
|
|
if (edid == NULL) {
|
|
return 0;
|
|
}
|
|
if (!drm_edid_is_valid(edid)) {
|
|
dev_warn(connector->dev->dev, "%s: EDID invalid.\n",
|
|
drm_get_connector_name(connector));
|
|
return 0;
|
|
}
|
|
|
|
quirks = edid_get_quirks(edid);
|
|
|
|
/*
|
|
* EDID spec says modes should be preferred in this order:
|
|
* - preferred detailed mode
|
|
* - other detailed modes from base block
|
|
* - detailed modes from extension blocks
|
|
* - CVT 3-byte code modes
|
|
* - standard timing codes
|
|
* - established timing codes
|
|
* - modes inferred from GTF or CVT range information
|
|
*
|
|
* We get this pretty much right.
|
|
*
|
|
* XXX order for additional mode types in extension blocks?
|
|
*/
|
|
num_modes += add_detailed_modes(connector, edid, quirks);
|
|
num_modes += add_cvt_modes(connector, edid);
|
|
num_modes += add_standard_modes(connector, edid);
|
|
num_modes += add_established_modes(connector, edid);
|
|
num_modes += add_inferred_modes(connector, edid);
|
|
|
|
if (quirks & (EDID_QUIRK_PREFER_LARGE_60 | EDID_QUIRK_PREFER_LARGE_75))
|
|
edid_fixup_preferred(connector, quirks);
|
|
|
|
drm_add_display_info(edid, &connector->display_info);
|
|
|
|
return num_modes;
|
|
}
|
|
EXPORT_SYMBOL(drm_add_edid_modes);
|
|
|
|
/**
|
|
* drm_add_modes_noedid - add modes for the connectors without EDID
|
|
* @connector: connector we're probing
|
|
* @hdisplay: the horizontal display limit
|
|
* @vdisplay: the vertical display limit
|
|
*
|
|
* Add the specified modes to the connector's mode list. Only when the
|
|
* hdisplay/vdisplay is not beyond the given limit, it will be added.
|
|
*
|
|
* Return number of modes added or 0 if we couldn't find any.
|
|
*/
|
|
int drm_add_modes_noedid(struct drm_connector *connector,
|
|
int hdisplay, int vdisplay)
|
|
{
|
|
int i, count, num_modes = 0;
|
|
struct drm_display_mode *mode;
|
|
struct drm_device *dev = connector->dev;
|
|
|
|
count = sizeof(drm_dmt_modes) / sizeof(struct drm_display_mode);
|
|
if (hdisplay < 0)
|
|
hdisplay = 0;
|
|
if (vdisplay < 0)
|
|
vdisplay = 0;
|
|
|
|
for (i = 0; i < count; i++) {
|
|
const struct drm_display_mode *ptr = &drm_dmt_modes[i];
|
|
if (hdisplay && vdisplay) {
|
|
/*
|
|
* Only when two are valid, they will be used to check
|
|
* whether the mode should be added to the mode list of
|
|
* the connector.
|
|
*/
|
|
if (ptr->hdisplay > hdisplay ||
|
|
ptr->vdisplay > vdisplay)
|
|
continue;
|
|
}
|
|
if (drm_mode_vrefresh(ptr) > 61)
|
|
continue;
|
|
mode = drm_mode_duplicate(dev, ptr);
|
|
if (mode) {
|
|
drm_mode_probed_add(connector, mode);
|
|
num_modes++;
|
|
}
|
|
}
|
|
return num_modes;
|
|
}
|
|
EXPORT_SYMBOL(drm_add_modes_noedid);
|