![Michel Dänzer](/assets/img/avatar_default.png)
Mostly replacing bitfields with explicit masks and shifts. Signed-off-by: Dave Airlie <airlied@redhat.com>
795 lines
24 KiB
C
795 lines
24 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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*
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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/i2c.h>
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#include <linux/i2c-algo-bit.h>
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#include "drmP.h"
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#include "drm_edid.h"
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/*
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* TODO:
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* - support EDID 1.4 (incl. CE blocks)
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*/
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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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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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/* 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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/* Valid EDID header has these bytes */
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static u8 edid_header[] = { 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 };
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/**
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* edid_is_valid - sanity check EDID data
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* @edid: EDID data
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*
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* Sanity check the EDID block by looking at the header, the version number
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* and the checksum. Return 0 if the EDID doesn't check out, or 1 if it's
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* valid.
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*/
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static bool edid_is_valid(struct edid *edid)
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{
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int i;
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u8 csum = 0;
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u8 *raw_edid = (u8 *)edid;
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if (memcmp(edid->header, edid_header, sizeof(edid_header)))
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goto bad;
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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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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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goto bad;
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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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DRM_ERROR("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("\n");
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}
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return 0;
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}
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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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return 0;
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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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* 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;
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/* Largest mode is preferred */
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if (MODE_SIZE(cur_mode) > MODE_SIZE(preferred_mode))
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preferred_mode = cur_mode;
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/* 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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preferred_mode->type |= DRM_MODE_TYPE_PREFERRED;
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}
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/**
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* drm_mode_std - convert standard mode info (width, height, refresh) into mode
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* @t: standard timing params
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*
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* Take the standard timing params (in this case width, aspect, and refresh)
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* and convert them into a real mode using CVT.
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*
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* Punts for now, but should eventually use the FB layer's CVT based mode
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* generation code.
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*/
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struct drm_display_mode *drm_mode_std(struct drm_device *dev,
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struct std_timing *t)
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{
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struct drm_display_mode *mode;
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int hsize = t->hsize * 8 + 248, vsize;
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unsigned aspect_ratio = (t->vfreq_aspect & EDID_TIMING_ASPECT_MASK)
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>> EDID_TIMING_ASPECT_SHIFT;
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mode = drm_mode_create(dev);
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if (!mode)
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return NULL;
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if (aspect_ratio == 0)
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vsize = (hsize * 10) / 16;
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else if (aspect_ratio == 1)
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vsize = (hsize * 3) / 4;
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else if (aspect_ratio == 2)
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vsize = (hsize * 4) / 5;
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else
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vsize = (hsize * 9) / 16;
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drm_mode_set_name(mode);
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return mode;
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}
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/**
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* drm_mode_detailed - create a new mode from an EDID detailed timing section
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* @dev: DRM device (needed to create new mode)
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* @edid: EDID block
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* @timing: EDID detailed timing info
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* @quirks: quirks to apply
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*
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* An EDID detailed timing block contains enough info for us to create and
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* return a new struct drm_display_mode.
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*/
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static struct drm_display_mode *drm_mode_detailed(struct drm_device *dev,
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struct edid *edid,
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struct detailed_timing *timing,
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u32 quirks)
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{
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struct drm_display_mode *mode;
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struct detailed_pixel_timing *pt = &timing->data.pixel_data;
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unsigned hactive = (pt->hactive_hblank_hi & 0xf0) << 4 | pt->hactive_lo;
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unsigned vactive = (pt->vactive_vblank_hi & 0xf0) << 4 | pt->vactive_lo;
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unsigned hblank = (pt->hactive_hblank_hi & 0xf) << 8 | pt->hblank_lo;
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unsigned vblank = (pt->vactive_vblank_hi & 0xf) << 8 | pt->vblank_lo;
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unsigned hsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0x3) << 8 | pt->hsync_offset_lo;
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unsigned hsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0xc) << 6 | pt->hsync_pulse_width_lo;
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unsigned vsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0x30) | (pt->vsync_offset_pulse_width_lo & 0xf);
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unsigned vsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0xc0) >> 2 | pt->vsync_offset_pulse_width_lo >> 4;
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/* ignore tiny modes */
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if (hactive < 64 || vactive < 64)
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return NULL;
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if (pt->misc & DRM_EDID_PT_STEREO) {
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printk(KERN_WARNING "stereo mode not supported\n");
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return NULL;
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}
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if (!(pt->misc & DRM_EDID_PT_SEPARATE_SYNC)) {
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printk(KERN_WARNING "integrated sync not supported\n");
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return NULL;
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}
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mode = drm_mode_create(dev);
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if (!mode)
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return NULL;
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mode->type = DRM_MODE_TYPE_DRIVER;
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if (quirks & EDID_QUIRK_135_CLOCK_TOO_HIGH)
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timing->pixel_clock = cpu_to_le16(1088);
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mode->clock = le16_to_cpu(timing->pixel_clock) * 10;
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mode->hdisplay = hactive;
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mode->hsync_start = mode->hdisplay + hsync_offset;
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mode->hsync_end = mode->hsync_start + hsync_pulse_width;
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mode->htotal = mode->hdisplay + hblank;
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mode->vdisplay = vactive;
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mode->vsync_start = mode->vdisplay + vsync_offset;
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mode->vsync_end = mode->vsync_start + vsync_pulse_width;
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mode->vtotal = mode->vdisplay + vblank;
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drm_mode_set_name(mode);
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if (pt->misc & DRM_EDID_PT_INTERLACED)
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mode->flags |= DRM_MODE_FLAG_INTERLACE;
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if (quirks & EDID_QUIRK_DETAILED_SYNC_PP) {
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pt->misc |= DRM_EDID_PT_HSYNC_POSITIVE | DRM_EDID_PT_VSYNC_POSITIVE;
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}
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mode->flags |= (pt->misc & DRM_EDID_PT_HSYNC_POSITIVE) ?
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DRM_MODE_FLAG_PHSYNC : DRM_MODE_FLAG_NHSYNC;
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mode->flags |= (pt->misc & DRM_EDID_PT_VSYNC_POSITIVE) ?
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DRM_MODE_FLAG_PVSYNC : DRM_MODE_FLAG_NVSYNC;
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mode->width_mm = pt->width_mm_lo | (pt->width_height_mm_hi & 0xf) << 8;
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mode->height_mm = pt->height_mm_lo | (pt->width_height_mm_hi & 0xf0) << 4;
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if (quirks & EDID_QUIRK_DETAILED_IN_CM) {
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mode->width_mm *= 10;
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mode->height_mm *= 10;
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}
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if (quirks & EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE) {
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mode->width_mm = edid->width_cm * 10;
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mode->height_mm = edid->height_cm * 10;
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}
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return mode;
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}
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/*
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* Detailed mode info for the EDID "established modes" data to use.
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*/
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static struct drm_display_mode edid_est_modes[] = {
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{ DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 40000, 800, 840,
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968, 1056, 0, 600, 601, 605, 628, 0,
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DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 800x600@60Hz */
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{ DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 36000, 800, 824,
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896, 1024, 0, 600, 601, 603, 625, 0,
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DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 800x600@56Hz */
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{ DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 31500, 640, 656,
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720, 840, 0, 480, 481, 484, 500, 0,
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DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 640x480@75Hz */
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{ DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 31500, 640, 664,
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704, 832, 0, 480, 489, 491, 520, 0,
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DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 640x480@72Hz */
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{ DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 30240, 640, 704,
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768, 864, 0, 480, 483, 486, 525, 0,
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DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 640x480@67Hz */
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{ DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 25200, 640, 656,
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752, 800, 0, 480, 490, 492, 525, 0,
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DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 640x480@60Hz */
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{ DRM_MODE("720x400", DRM_MODE_TYPE_DRIVER, 35500, 720, 738,
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846, 900, 0, 400, 421, 423, 449, 0,
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DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 720x400@88Hz */
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{ DRM_MODE("720x400", DRM_MODE_TYPE_DRIVER, 28320, 720, 738,
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846, 900, 0, 400, 412, 414, 449, 0,
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DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 720x400@70Hz */
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{ DRM_MODE("1280x1024", DRM_MODE_TYPE_DRIVER, 135000, 1280, 1296,
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1440, 1688, 0, 1024, 1025, 1028, 1066, 0,
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DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 1280x1024@75Hz */
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{ DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 78800, 1024, 1040,
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1136, 1312, 0, 768, 769, 772, 800, 0,
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DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 1024x768@75Hz */
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{ DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 75000, 1024, 1048,
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1184, 1328, 0, 768, 771, 777, 806, 0,
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DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 1024x768@70Hz */
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{ DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 65000, 1024, 1048,
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1184, 1344, 0, 768, 771, 777, 806, 0,
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DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 1024x768@60Hz */
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{ DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER,44900, 1024, 1032,
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1208, 1264, 0, 768, 768, 776, 817, 0,
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DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC | DRM_MODE_FLAG_INTERLACE) }, /* 1024x768@43Hz */
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{ DRM_MODE("832x624", DRM_MODE_TYPE_DRIVER, 57284, 832, 864,
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928, 1152, 0, 624, 625, 628, 667, 0,
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DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 832x624@75Hz */
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{ DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 49500, 800, 816,
|
|
896, 1056, 0, 600, 601, 604, 625, 0,
|
|
DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 800x600@75Hz */
|
|
{ DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 50000, 800, 856,
|
|
976, 1040, 0, 600, 637, 643, 666, 0,
|
|
DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 800x600@72Hz */
|
|
{ DRM_MODE("1152x864", DRM_MODE_TYPE_DRIVER, 108000, 1152, 1216,
|
|
1344, 1600, 0, 864, 865, 868, 900, 0,
|
|
DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 1152x864@75Hz */
|
|
};
|
|
|
|
#define EDID_EST_TIMINGS 16
|
|
#define EDID_STD_TIMINGS 8
|
|
#define EDID_DETAILED_TIMINGS 4
|
|
|
|
/**
|
|
* 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;
|
|
|
|
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++;
|
|
}
|
|
}
|
|
|
|
return modes;
|
|
}
|
|
|
|
/**
|
|
* add_standard_modes - get std. modes from EDID and add them
|
|
* @edid: EDID block to scan
|
|
*
|
|
* Standard modes can be calculated using the CVT standard. Grab them from
|
|
* @edid, calculate them, and add them to the list.
|
|
*/
|
|
static int add_standard_modes(struct drm_connector *connector, struct edid *edid)
|
|
{
|
|
struct drm_device *dev = connector->dev;
|
|
int i, modes = 0;
|
|
|
|
for (i = 0; i < EDID_STD_TIMINGS; i++) {
|
|
struct std_timing *t = &edid->standard_timings[i];
|
|
struct drm_display_mode *newmode;
|
|
|
|
/* If std timings bytes are 1, 1 it's empty */
|
|
if (t->hsize == 1 && t->vfreq_aspect == 1)
|
|
continue;
|
|
|
|
newmode = drm_mode_std(dev, &edid->standard_timings[i]);
|
|
if (newmode) {
|
|
drm_mode_probed_add(connector, newmode);
|
|
modes++;
|
|
}
|
|
}
|
|
|
|
return modes;
|
|
}
|
|
|
|
/**
|
|
* add_detailed_modes - get detailed mode info from EDID data
|
|
* @connector: attached connector
|
|
* @edid: EDID block to scan
|
|
* @quirks: quirks to apply
|
|
*
|
|
* Some of the detailed timing sections may contain mode information. Grab
|
|
* it and add it to the list.
|
|
*/
|
|
static int add_detailed_info(struct drm_connector *connector,
|
|
struct edid *edid, u32 quirks)
|
|
{
|
|
struct drm_device *dev = connector->dev;
|
|
int i, j, modes = 0;
|
|
|
|
for (i = 0; i < EDID_DETAILED_TIMINGS; i++) {
|
|
struct detailed_timing *timing = &edid->detailed_timings[i];
|
|
struct detailed_non_pixel *data = &timing->data.other_data;
|
|
struct drm_display_mode *newmode;
|
|
|
|
/* EDID up to and including 1.2 may put monitor info here */
|
|
if (edid->version == 1 && edid->revision < 3)
|
|
continue;
|
|
|
|
/* Detailed mode timing */
|
|
if (timing->pixel_clock) {
|
|
newmode = drm_mode_detailed(dev, edid, timing, quirks);
|
|
if (!newmode)
|
|
continue;
|
|
|
|
/* First detailed mode is preferred */
|
|
if (i == 0 && (edid->features & DRM_EDID_FEATURE_PREFERRED_TIMING))
|
|
newmode->type |= DRM_MODE_TYPE_PREFERRED;
|
|
drm_mode_probed_add(connector, newmode);
|
|
|
|
modes++;
|
|
continue;
|
|
}
|
|
|
|
/* Other timing or info */
|
|
switch (data->type) {
|
|
case EDID_DETAIL_MONITOR_SERIAL:
|
|
break;
|
|
case EDID_DETAIL_MONITOR_STRING:
|
|
break;
|
|
case EDID_DETAIL_MONITOR_RANGE:
|
|
/* Get monitor range data */
|
|
break;
|
|
case EDID_DETAIL_MONITOR_NAME:
|
|
break;
|
|
case EDID_DETAIL_MONITOR_CPDATA:
|
|
break;
|
|
case EDID_DETAIL_STD_MODES:
|
|
/* Five modes per detailed section */
|
|
for (j = 0; j < 5; i++) {
|
|
struct std_timing *std;
|
|
struct drm_display_mode *newmode;
|
|
|
|
std = &data->data.timings[j];
|
|
newmode = drm_mode_std(dev, std);
|
|
if (newmode) {
|
|
drm_mode_probed_add(connector, newmode);
|
|
modes++;
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
return modes;
|
|
}
|
|
|
|
#define DDC_ADDR 0x50
|
|
/**
|
|
* Get EDID information via I2C.
|
|
*
|
|
* \param adapter : i2c device adaptor
|
|
* \param buf : EDID data buffer to be filled
|
|
* \param len : EDID data buffer length
|
|
* \return 0 on success or -1 on failure.
|
|
*
|
|
* Try to fetch EDID information by calling i2c driver function.
|
|
*/
|
|
int drm_do_probe_ddc_edid(struct i2c_adapter *adapter,
|
|
unsigned char *buf, int len)
|
|
{
|
|
unsigned char start = 0x0;
|
|
struct i2c_msg msgs[] = {
|
|
{
|
|
.addr = DDC_ADDR,
|
|
.flags = 0,
|
|
.len = 1,
|
|
.buf = &start,
|
|
}, {
|
|
.addr = DDC_ADDR,
|
|
.flags = I2C_M_RD,
|
|
.len = len,
|
|
.buf = buf,
|
|
}
|
|
};
|
|
|
|
if (i2c_transfer(adapter, msgs, 2) == 2)
|
|
return 0;
|
|
|
|
dev_info(&adapter->dev, "unable to read EDID block.\n");
|
|
return -1;
|
|
}
|
|
EXPORT_SYMBOL(drm_do_probe_ddc_edid);
|
|
|
|
static int drm_ddc_read_edid(struct drm_connector *connector,
|
|
struct i2c_adapter *adapter,
|
|
char *buf, int len)
|
|
{
|
|
int ret;
|
|
|
|
ret = drm_do_probe_ddc_edid(adapter, buf, len);
|
|
if (ret != 0) {
|
|
dev_info(&connector->dev->pdev->dev, "%s: no EDID data\n",
|
|
drm_get_connector_name(connector));
|
|
goto end;
|
|
}
|
|
if (!edid_is_valid((struct edid *)buf)) {
|
|
dev_warn(&connector->dev->pdev->dev, "%s: EDID invalid.\n",
|
|
drm_get_connector_name(connector));
|
|
ret = -1;
|
|
}
|
|
end:
|
|
return ret;
|
|
}
|
|
|
|
#define MAX_EDID_EXT_NUM 4
|
|
/**
|
|
* drm_get_edid - get EDID data, if available
|
|
* @connector: connector we're probing
|
|
* @adapter: i2c adapter to use for DDC
|
|
*
|
|
* Poke the given connector's i2c channel to grab EDID data if possible.
|
|
*
|
|
* Return edid data or NULL if we couldn't find any.
|
|
*/
|
|
struct edid *drm_get_edid(struct drm_connector *connector,
|
|
struct i2c_adapter *adapter)
|
|
{
|
|
int ret;
|
|
struct edid *edid;
|
|
|
|
edid = kmalloc(EDID_LENGTH * (MAX_EDID_EXT_NUM + 1),
|
|
GFP_KERNEL);
|
|
if (edid == NULL) {
|
|
dev_warn(&connector->dev->pdev->dev,
|
|
"Failed to allocate EDID\n");
|
|
goto end;
|
|
}
|
|
|
|
/* Read first EDID block */
|
|
ret = drm_ddc_read_edid(connector, adapter,
|
|
(unsigned char *)edid, EDID_LENGTH);
|
|
if (ret != 0)
|
|
goto clean_up;
|
|
|
|
/* There are EDID extensions to be read */
|
|
if (edid->extensions != 0) {
|
|
int edid_ext_num = edid->extensions;
|
|
|
|
if (edid_ext_num > MAX_EDID_EXT_NUM) {
|
|
dev_warn(&connector->dev->pdev->dev,
|
|
"The number of extension(%d) is "
|
|
"over max (%d), actually read number (%d)\n",
|
|
edid_ext_num, MAX_EDID_EXT_NUM,
|
|
MAX_EDID_EXT_NUM);
|
|
/* Reset EDID extension number to be read */
|
|
edid_ext_num = MAX_EDID_EXT_NUM;
|
|
}
|
|
/* Read EDID including extensions too */
|
|
ret = drm_ddc_read_edid(connector, adapter, (char *)edid,
|
|
EDID_LENGTH * (edid_ext_num + 1));
|
|
if (ret != 0)
|
|
goto clean_up;
|
|
|
|
}
|
|
|
|
connector->display_info.raw_edid = (char *)edid;
|
|
goto end;
|
|
|
|
clean_up:
|
|
kfree(edid);
|
|
edid = NULL;
|
|
end:
|
|
return edid;
|
|
|
|
}
|
|
EXPORT_SYMBOL(drm_get_edid);
|
|
|
|
#define HDMI_IDENTIFIER 0x000C03
|
|
#define VENDOR_BLOCK 0x03
|
|
/**
|
|
* 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)
|
|
{
|
|
char *edid_ext = NULL;
|
|
int i, hdmi_id, edid_ext_num;
|
|
int start_offset, end_offset;
|
|
bool is_hdmi = false;
|
|
|
|
/* No EDID or EDID extensions */
|
|
if (edid == NULL || edid->extensions == 0)
|
|
goto end;
|
|
|
|
/* Chose real EDID extension number */
|
|
edid_ext_num = edid->extensions > MAX_EDID_EXT_NUM ?
|
|
MAX_EDID_EXT_NUM : edid->extensions;
|
|
|
|
/* Find CEA extension */
|
|
for (i = 0; i < edid_ext_num; i++) {
|
|
edid_ext = (char *)edid + EDID_LENGTH * (i + 1);
|
|
/* This block is CEA extension */
|
|
if (edid_ext[0] == 0x02)
|
|
break;
|
|
}
|
|
|
|
if (i == edid_ext_num)
|
|
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_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 (!edid_is_valid(edid)) {
|
|
dev_warn(&connector->dev->pdev->dev, "%s: EDID invalid.\n",
|
|
drm_get_connector_name(connector));
|
|
return 0;
|
|
}
|
|
|
|
quirks = edid_get_quirks(edid);
|
|
|
|
num_modes += add_established_modes(connector, edid);
|
|
num_modes += add_standard_modes(connector, edid);
|
|
num_modes += add_detailed_info(connector, edid, quirks);
|
|
|
|
if (quirks & (EDID_QUIRK_PREFER_LARGE_60 | EDID_QUIRK_PREFER_LARGE_75))
|
|
edid_fixup_preferred(connector, quirks);
|
|
|
|
connector->display_info.serration_vsync = (edid->input & DRM_EDID_INPUT_SERRATION_VSYNC) ? 1 : 0;
|
|
connector->display_info.sync_on_green = (edid->input & DRM_EDID_INPUT_SYNC_ON_GREEN) ? 1 : 0;
|
|
connector->display_info.composite_sync = (edid->input & DRM_EDID_INPUT_COMPOSITE_SYNC) ? 1 : 0;
|
|
connector->display_info.separate_syncs = (edid->input & DRM_EDID_INPUT_SEPARATE_SYNCS) ? 1 : 0;
|
|
connector->display_info.blank_to_black = (edid->input & DRM_EDID_INPUT_BLANK_TO_BLACK) ? 1 : 0;
|
|
connector->display_info.video_level = (edid->input & DRM_EDID_INPUT_VIDEO_LEVEL) >> 5;
|
|
connector->display_info.digital = (edid->input & DRM_EDID_INPUT_DIGITAL) ? 1 : 0;
|
|
connector->display_info.width_mm = edid->width_cm * 10;
|
|
connector->display_info.height_mm = edid->height_cm * 10;
|
|
connector->display_info.gamma = edid->gamma;
|
|
connector->display_info.gtf_supported = (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF) ? 1 : 0;
|
|
connector->display_info.standard_color = (edid->features & DRM_EDID_FEATURE_STANDARD_COLOR) ? 1 : 0;
|
|
connector->display_info.display_type = (edid->features & DRM_EDID_FEATURE_DISPLAY_TYPE) >> 3;
|
|
connector->display_info.active_off_supported = (edid->features & DRM_EDID_FEATURE_PM_ACTIVE_OFF) ? 1 : 0;
|
|
connector->display_info.suspend_supported = (edid->features & DRM_EDID_FEATURE_PM_SUSPEND) ? 1 : 0;
|
|
connector->display_info.standby_supported = (edid->features & DRM_EDID_FEATURE_PM_STANDBY) ? 1 : 0;
|
|
connector->display_info.gamma = edid->gamma;
|
|
|
|
return num_modes;
|
|
}
|
|
EXPORT_SYMBOL(drm_add_edid_modes);
|