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7a37435008
linux/drivers/gpu/drm/drm_edid.c
Adam Jackson 7a37435008 drm/edid: Add secondary GTF curve support 
Before CVT-R, some monitors would advertise support for an alternative
GTF formula with lower blanking intervals.  Correctly identify such
monitors, and use the alternative formula when generating modes for
them.

Note that we only do this for "standard" timing descriptors (tuples of
hsize in characters / aspect ratio / vertical refresh).  Range-based
mode lists still only refer to the primary GTF curve.  It would be
possible to do better for the latter case, but monitors are required to
support the primary curve over the entire advertised range, so all it
would win you is a lower pixel clock and therefore possibly better image
quality on analog links.

Signed-off-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2010-04-06 10:40:25 +10:00

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/*
* Copyright (c) 2006 Luc Verhaegen (quirks list)
* Copyright (c) 2007-2008 Intel Corporation
* Jesse Barnes <jesse.barnes@intel.com>
* Copyright 2010 Red Hat, Inc.
*
* DDC probing routines (drm_ddc_read & drm_do_probe_ddc_edid) originally from
* FB layer.
* Copyright (C) 2006 Dennis Munsie <dmunsie@cecropia.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sub license,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include <linux/kernel.h>
#include <linux/i2c.h>
#include <linux/i2c-algo-bit.h>
#include "drmP.h"
#include "drm_edid.h"
#define EDID_EST_TIMINGS 16
#define EDID_STD_TIMINGS 8
#define EDID_DETAILED_TIMINGS 4
/*
* EDID blocks out in the wild have a variety of bugs, try to collect
* them here (note that userspace may work around broken monitors first,
* but fixes should make their way here so that the kernel "just works"
* on as many displays as possible).
*/
/* First detailed mode wrong, use largest 60Hz mode */
#define EDID_QUIRK_PREFER_LARGE_60 (1 << 0)
/* Reported 135MHz pixel clock is too high, needs adjustment */
#define EDID_QUIRK_135_CLOCK_TOO_HIGH (1 << 1)
/* Prefer the largest mode at 75 Hz */
#define EDID_QUIRK_PREFER_LARGE_75 (1 << 2)
/* Detail timing is in cm not mm */
#define EDID_QUIRK_DETAILED_IN_CM (1 << 3)
/* Detailed timing descriptors have bogus size values, so just take the
* maximum size and use that.
*/
#define EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE (1 << 4)
/* Monitor forgot to set the first detailed is preferred bit. */
#define EDID_QUIRK_FIRST_DETAILED_PREFERRED (1 << 5)
/* use +hsync +vsync for detailed mode */
#define EDID_QUIRK_DETAILED_SYNC_PP (1 << 6)
#define LEVEL_DMT 0
#define LEVEL_GTF 1
#define LEVEL_GTF2 2
#define LEVEL_CVT 3
static struct edid_quirk {
char *vendor;
int product_id;
u32 quirks;
} edid_quirk_list[] = {
/* Acer AL1706 */
{ "ACR", 44358, EDID_QUIRK_PREFER_LARGE_60 },
/* Acer F51 */
{ "API", 0x7602, EDID_QUIRK_PREFER_LARGE_60 },
/* Unknown Acer */
{ "ACR", 2423, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
/* Belinea 10 15 55 */
{ "MAX", 1516, EDID_QUIRK_PREFER_LARGE_60 },
{ "MAX", 0x77e, EDID_QUIRK_PREFER_LARGE_60 },
/* Envision Peripherals, Inc. EN-7100e */
{ "EPI", 59264, EDID_QUIRK_135_CLOCK_TOO_HIGH },
/* Funai Electronics PM36B */
{ "FCM", 13600, EDID_QUIRK_PREFER_LARGE_75 |
EDID_QUIRK_DETAILED_IN_CM },
/* LG Philips LCD LP154W01-A5 */
{ "LPL", 0, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE },
{ "LPL", 0x2a00, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE },
/* Philips 107p5 CRT */
{ "PHL", 57364, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
/* Proview AY765C */
{ "PTS", 765, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
/* Samsung SyncMaster 205BW. Note: irony */
{ "SAM", 541, EDID_QUIRK_DETAILED_SYNC_PP },
/* Samsung SyncMaster 22[5-6]BW */
{ "SAM", 596, EDID_QUIRK_PREFER_LARGE_60 },
{ "SAM", 638, EDID_QUIRK_PREFER_LARGE_60 },
};
/*** DDC fetch and block validation ***/
static const u8 edid_header[] = {
0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00
};
/*
* Sanity check the EDID block (base or extension). Return 0 if the block
* doesn't check out, or 1 if it's valid.
*/
static bool
drm_edid_block_valid(u8 *raw_edid)
{
int i;
u8 csum = 0;
struct edid *edid = (struct edid *)raw_edid;
if (raw_edid[0] == 0x00) {
int score = 0;
for (i = 0; i < sizeof(edid_header); i++)
if (raw_edid[i] == edid_header[i])
score++;
if (score == 8) ;
else if (score >= 6) {
DRM_DEBUG("Fixing EDID header, your hardware may be failing\n");
memcpy(raw_edid, edid_header, sizeof(edid_header));
} else {
goto bad;
}
}
for (i = 0; i < EDID_LENGTH; i++)
csum += raw_edid[i];
if (csum) {
DRM_ERROR("EDID checksum is invalid, remainder is %d\n", csum);
goto bad;
}
/* per-block-type checks */
switch (raw_edid[0]) {
case 0: /* base */
if (edid->version != 1) {
DRM_ERROR("EDID has major version %d, instead of 1\n", edid->version);
goto bad;
}
if (edid->revision > 4)
DRM_DEBUG("EDID minor > 4, assuming backward compatibility\n");
break;
default:
break;
}
return 1;
bad:
if (raw_edid) {
DRM_ERROR("Raw EDID:\n");
print_hex_dump_bytes(KERN_ERR, DUMP_PREFIX_NONE, raw_edid, EDID_LENGTH);
printk("\n");
}
return 0;
}
/**
* drm_edid_is_valid - sanity check EDID data
* @edid: EDID data
*
* Sanity-check an entire EDID record (including extensions)
*/
bool drm_edid_is_valid(struct edid *edid)
{
int i;
u8 *raw = (u8 *)edid;
if (!edid)
return false;
for (i = 0; i <= edid->extensions; i++)
if (!drm_edid_block_valid(raw + i * EDID_LENGTH))
return false;
return true;
}
EXPORT_SYMBOL(drm_edid_is_valid);
#define DDC_ADDR 0x50
#define DDC_SEGMENT_ADDR 0x30
/**
* 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.
*/
static int
drm_do_probe_ddc_edid(struct i2c_adapter *adapter, unsigned char *buf,
int block, int len)
{
unsigned char start = block * EDID_LENGTH;
struct i2c_msg msgs[] = {
{
.addr = DDC_ADDR,
.flags = 0,
.len = 1,
.buf = &start,
}, {
.addr = DDC_ADDR,
.flags = I2C_M_RD,
.len = len,
.buf = buf + start,
}
};
if (i2c_transfer(adapter, msgs, 2) == 2)
return 0;
return -1;
}
static u8 *
drm_do_get_edid(struct drm_connector *connector, struct i2c_adapter *adapter)
{
int i, j = 0;
u8 *block, *new;
if ((block = kmalloc(EDID_LENGTH, GFP_KERNEL)) == NULL)
return NULL;
/* base block fetch */
for (i = 0; i < 4; i++) {
if (drm_do_probe_ddc_edid(adapter, block, 0, EDID_LENGTH))
goto out;
if (drm_edid_block_valid(block))
break;
}
if (i == 4)
goto carp;
/* if there's no extensions, we're done */
if (block[0x7e] == 0)
return block;
new = krealloc(block, (block[0x7e] + 1) * EDID_LENGTH, GFP_KERNEL);
if (!new)
goto out;
block = new;
for (j = 1; j <= block[0x7e]; j++) {
for (i = 0; i < 4; i++) {
if (drm_do_probe_ddc_edid(adapter, block, j,
EDID_LENGTH))
goto out;
if (drm_edid_block_valid(block + j * EDID_LENGTH))
break;
}
if (i == 4)
goto carp;
}
return block;
carp:
dev_warn(&connector->dev->pdev->dev, "%s: EDID block %d invalid.\n",
drm_get_connector_name(connector), j);
out:
kfree(block);
return NULL;
}
/**
* Probe DDC presence.
*
* \param adapter : i2c device adaptor
* \return 1 on success
*/
static bool
drm_probe_ddc(struct i2c_adapter *adapter)
{
unsigned char out;
return (drm_do_probe_ddc_edid(adapter, &out, 0, 1) == 0);
}
/**
* drm_get_edid - get EDID data, if available
* @connector: connector we're probing
* @adapter: i2c adapter to use for DDC
*
* Poke the given i2c channel to grab EDID data if possible. If found,
* attach it to the connector.
*
* Return edid data or NULL if we couldn't find any.
*/
struct edid *drm_get_edid(struct drm_connector *connector,
struct i2c_adapter *adapter)
{
struct edid *edid = NULL;
if (drm_probe_ddc(adapter))
edid = (struct edid *)drm_do_get_edid(connector, adapter);
connector->display_info.raw_edid = (char *)edid;
return edid;
}
EXPORT_SYMBOL(drm_get_edid);
/*** EDID parsing ***/
/**
* edid_vendor - match a string against EDID's obfuscated vendor field
* @edid: EDID to match
* @vendor: vendor string
*
* Returns true if @vendor is in @edid, false otherwise
*/
static bool edid_vendor(struct edid *edid, char *vendor)
{
char edid_vendor[3];
edid_vendor[0] = ((edid->mfg_id[0] & 0x7c) >> 2) + '@';
edid_vendor[1] = (((edid->mfg_id[0] & 0x3) << 3) |
((edid->mfg_id[1] & 0xe0) >> 5)) + '@';
edid_vendor[2] = (edid->mfg_id[1] & 0x1f) + '@';
return !strncmp(edid_vendor, vendor, 3);
}
/**
* edid_get_quirks - return quirk flags for a given EDID
* @edid: EDID to process
*
* This tells subsequent routines what fixes they need to apply.
*/
static u32 edid_get_quirks(struct edid *edid)
{
struct edid_quirk *quirk;
int i;
for (i = 0; i < ARRAY_SIZE(edid_quirk_list); i++) {
quirk = &edid_quirk_list[i];
if (edid_vendor(edid, quirk->vendor) &&
(EDID_PRODUCT_ID(edid) == quirk->product_id))
return quirk->quirks;
}
return 0;
}
#define MODE_SIZE(m) ((m)->hdisplay * (m)->vdisplay)
#define MODE_REFRESH_DIFF(m,r) (abs((m)->vrefresh - target_refresh))
/**
* edid_fixup_preferred - set preferred modes based on quirk list
* @connector: has mode list to fix up
* @quirks: quirks list
*
* Walk the mode list for @connector, clearing the preferred status
* on existing modes and setting it anew for the right mode ala @quirks.
*/
static void edid_fixup_preferred(struct drm_connector *connector,
u32 quirks)
{
struct drm_display_mode *t, *cur_mode, *preferred_mode;
int target_refresh = 0;
if (list_empty(&connector->probed_modes))
return;
if (quirks & EDID_QUIRK_PREFER_LARGE_60)
target_refresh = 60;
if (quirks & EDID_QUIRK_PREFER_LARGE_75)
target_refresh = 75;
preferred_mode = list_first_entry(&connector->probed_modes,
struct drm_display_mode, head);
list_for_each_entry_safe(cur_mode, t, &connector->probed_modes, head) {
cur_mode->type &= ~DRM_MODE_TYPE_PREFERRED;
if (cur_mode == preferred_mode)
continue;
/* Largest mode is preferred */
if (MODE_SIZE(cur_mode) > MODE_SIZE(preferred_mode))
preferred_mode = cur_mode;
/* At a given size, try to get closest to target refresh */
if ((MODE_SIZE(cur_mode) == MODE_SIZE(preferred_mode)) &&
MODE_REFRESH_DIFF(cur_mode, target_refresh) <
MODE_REFRESH_DIFF(preferred_mode, target_refresh)) {
preferred_mode = cur_mode;
}
}
preferred_mode->type |= DRM_MODE_TYPE_PREFERRED;
}
/*
* Add the Autogenerated from the DMT spec.
* This table is copied from xfree86/modes/xf86EdidModes.c.
* But the mode with Reduced blank feature is deleted.
*/
static struct drm_display_mode drm_dmt_modes[] = {
/* 640x350@85Hz */
{ DRM_MODE("640x350", DRM_MODE_TYPE_DRIVER, 31500, 640, 672,
736, 832, 0, 350, 382, 385, 445, 0,
DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC) },
/* 640x400@85Hz */
{ DRM_MODE("640x400", DRM_MODE_TYPE_DRIVER, 31500, 640, 672,
736, 832, 0, 400, 401, 404, 445, 0,
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
/* 720x400@85Hz */
{ DRM_MODE("720x400", DRM_MODE_TYPE_DRIVER, 35500, 720, 756,
828, 936, 0, 400, 401, 404, 446, 0,
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
/* 640x480@60Hz */
{ DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 25175, 640, 656,
752, 800, 0, 480, 489, 492, 525, 0,
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) },
/* 640x480@72Hz */
{ DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 31500, 640, 664,
704, 832, 0, 480, 489, 492, 520, 0,
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) },
/* 640x480@75Hz */
{ DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 31500, 640, 656,
720, 840, 0, 480, 481, 484, 500, 0,
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) },
/* 640x480@85Hz */
{ DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 36000, 640, 696,
752, 832, 0, 480, 481, 484, 509, 0,
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) },
/* 800x600@56Hz */
{ DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 36000, 800, 824,
896, 1024, 0, 600, 601, 603, 625, 0,
DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
/* 800x600@60Hz */
{ DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 40000, 800, 840,
968, 1056, 0, 600, 601, 605, 628, 0,
DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
/* 800x600@72Hz */
{ 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@75Hz */
{ 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@85Hz */
{ DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 56250, 800, 832,
896, 1048, 0, 600, 601, 604, 631, 0,
DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
/* 848x480@60Hz */
{ DRM_MODE("848x480", DRM_MODE_TYPE_DRIVER, 33750, 848, 864,
976, 1088, 0, 480, 486, 494, 517, 0,
DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
/* 1024x768@43Hz, interlace */
{ DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 44900, 1024, 1032,
1208, 1264, 0, 768, 768, 772, 817, 0,
DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC |
DRM_MODE_FLAG_INTERLACE) },
/* 1024x768@60Hz */
{ DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 65000, 1024, 1048,
1184, 1344, 0, 768, 771, 777, 806, 0,
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) },
/* 1024x768@70Hz */
{ DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 75000, 1024, 1048,
1184, 1328, 0, 768, 771, 777, 806, 0,
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) },
/* 1024x768@75Hz */
{ DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 78750, 1024, 1040,
1136, 1312, 0, 768, 769, 772, 800, 0,
DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
/* 1024x768@85Hz */
{ DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 94500, 1024, 1072,
1072, 1376, 0, 768, 769, 772, 808, 0,
DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
/* 1152x864@75Hz */
{ 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) },
/* 1280x768@60Hz */
{ DRM_MODE("1280x768", DRM_MODE_TYPE_DRIVER, 79500, 1280, 1344,
1472, 1664, 0, 768, 771, 778, 798, 0,
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
/* 1280x768@75Hz */
{ DRM_MODE("1280x768", DRM_MODE_TYPE_DRIVER, 102250, 1280, 1360,
1488, 1696, 0, 768, 771, 778, 805, 0,
DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC) },
/* 1280x768@85Hz */
{ DRM_MODE("1280x768", DRM_MODE_TYPE_DRIVER, 117500, 1280, 1360,
1496, 1712, 0, 768, 771, 778, 809, 0,
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
/* 1280x800@60Hz */
{ DRM_MODE("1280x800", DRM_MODE_TYPE_DRIVER, 83500, 1280, 1352,
1480, 1680, 0, 800, 803, 809, 831, 0,
DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC) },
/* 1280x800@75Hz */
{ DRM_MODE("1280x800", DRM_MODE_TYPE_DRIVER, 106500, 1280, 1360,
1488, 1696, 0, 800, 803, 809, 838, 0,
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
/* 1280x800@85Hz */
{ DRM_MODE("1280x800", DRM_MODE_TYPE_DRIVER, 122500, 1280, 1360,
1496, 1712, 0, 800, 803, 809, 843, 0,
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
/* 1280x960@60Hz */
{ DRM_MODE("1280x960", DRM_MODE_TYPE_DRIVER, 108000, 1280, 1376,
1488, 1800, 0, 960, 961, 964, 1000, 0,
DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
/* 1280x960@85Hz */
{ DRM_MODE("1280x960", DRM_MODE_TYPE_DRIVER, 148500, 1280, 1344,
1504, 1728, 0, 960, 961, 964, 1011, 0,
DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
/* 1280x1024@60Hz */
{ DRM_MODE("1280x1024", DRM_MODE_TYPE_DRIVER, 108000, 1280, 1328,
1440, 1688, 0, 1024, 1025, 1028, 1066, 0,
DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
/* 1280x1024@75Hz */
{ DRM_MODE("1280x1024", DRM_MODE_TYPE_DRIVER, 135000, 1280, 1296,
1440, 1688, 0, 1024, 1025, 1028, 1066, 0,
DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
/* 1280x1024@85Hz */
{ DRM_MODE("1280x1024", DRM_MODE_TYPE_DRIVER, 157500, 1280, 1344,
1504, 1728, 0, 1024, 1025, 1028, 1072, 0,
DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
/* 1360x768@60Hz */
{ DRM_MODE("1360x768", DRM_MODE_TYPE_DRIVER, 85500, 1360, 1424,
1536, 1792, 0, 768, 771, 777, 795, 0,
DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
/* 1440x1050@60Hz */
{ DRM_MODE("1400x1050", DRM_MODE_TYPE_DRIVER, 121750, 1400, 1488,
1632, 1864, 0, 1050, 1053, 1057, 1089, 0,
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
/* 1440x1050@75Hz */
{ DRM_MODE("1400x1050", DRM_MODE_TYPE_DRIVER, 156000, 1400, 1504,
1648, 1896, 0, 1050, 1053, 1057, 1099, 0,
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
/* 1440x1050@85Hz */
{ DRM_MODE("1400x1050", DRM_MODE_TYPE_DRIVER, 179500, 1400, 1504,
1656, 1912, 0, 1050, 1053, 1057, 1105, 0,
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
/* 1440x900@60Hz */
{ DRM_MODE("1440x900", DRM_MODE_TYPE_DRIVER, 106500, 1440, 1520,
1672, 1904, 0, 900, 903, 909, 934, 0,
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
/* 1440x900@75Hz */
{ DRM_MODE("1440x900", DRM_MODE_TYPE_DRIVER, 136750, 1440, 1536,
1688, 1936, 0, 900, 903, 909, 942, 0,
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
/* 1440x900@85Hz */
{ DRM_MODE("1440x900", DRM_MODE_TYPE_DRIVER, 157000, 1440, 1544,
1696, 1952, 0, 900, 903, 909, 948, 0,
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
/* 1600x1200@60Hz */
{ DRM_MODE("1600x1200", DRM_MODE_TYPE_DRIVER, 162000, 1600, 1664,
1856, 2160, 0, 1200, 1201, 1204, 1250, 0,
DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
/* 1600x1200@65Hz */
{ DRM_MODE("1600x1200", DRM_MODE_TYPE_DRIVER, 175500, 1600, 1664,
1856, 2160, 0, 1200, 1201, 1204, 1250, 0,
DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
/* 1600x1200@70Hz */
{ DRM_MODE("1600x1200", DRM_MODE_TYPE_DRIVER, 189000, 1600, 1664,
1856, 2160, 0, 1200, 1201, 1204, 1250, 0,
DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
/* 1600x1200@75Hz */
{ DRM_MODE("1600x1200", DRM_MODE_TYPE_DRIVER, 2025000, 1600, 1664,
1856, 2160, 0, 1200, 1201, 1204, 1250, 0,
DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
/* 1600x1200@85Hz */
{ DRM_MODE("1600x1200", DRM_MODE_TYPE_DRIVER, 229500, 1600, 1664,
1856, 2160, 0, 1200, 1201, 1204, 1250, 0,
DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
/* 1680x1050@60Hz */
{ DRM_MODE("1680x1050", DRM_MODE_TYPE_DRIVER, 146250, 1680, 1784,
1960, 2240, 0, 1050, 1053, 1059, 1089, 0,
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
/* 1680x1050@75Hz */
{ DRM_MODE("1680x1050", DRM_MODE_TYPE_DRIVER, 187000, 1680, 1800,
1976, 2272, 0, 1050, 1053, 1059, 1099, 0,
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
/* 1680x1050@85Hz */
{ DRM_MODE("1680x1050", DRM_MODE_TYPE_DRIVER, 214750, 1680, 1808,
1984, 2288, 0, 1050, 1053, 1059, 1105, 0,
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
/* 1792x1344@60Hz */
{ DRM_MODE("1792x1344", DRM_MODE_TYPE_DRIVER, 204750, 1792, 1920,
2120, 2448, 0, 1344, 1345, 1348, 1394, 0,
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
/* 1729x1344@75Hz */
{ DRM_MODE("1792x1344", DRM_MODE_TYPE_DRIVER, 261000, 1792, 1888,
2104, 2456, 0, 1344, 1345, 1348, 1417, 0,
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
/* 1853x1392@60Hz */
{ DRM_MODE("1856x1392", DRM_MODE_TYPE_DRIVER, 218250, 1856, 1952,
2176, 2528, 0, 1392, 1393, 1396, 1439, 0,
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
/* 1856x1392@75Hz */
{ DRM_MODE("1856x1392", DRM_MODE_TYPE_DRIVER, 288000, 1856, 1984,
2208, 2560, 0, 1392, 1395, 1399, 1500, 0,
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
/* 1920x1200@60Hz */
{ DRM_MODE("1920x1200", DRM_MODE_TYPE_DRIVER, 193250, 1920, 2056,
2256, 2592, 0, 1200, 1203, 1209, 1245, 0,
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
/* 1920x1200@75Hz */
{ DRM_MODE("1920x1200", DRM_MODE_TYPE_DRIVER, 245250, 1920, 2056,
2264, 2608, 0, 1200, 1203, 1209, 1255, 0,
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
/* 1920x1200@85Hz */
{ DRM_MODE("1920x1200", DRM_MODE_TYPE_DRIVER, 281250, 1920, 2064,
2272, 2624, 0, 1200, 1203, 1209, 1262, 0,
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
/* 1920x1440@60Hz */
{ DRM_MODE("1920x1440", DRM_MODE_TYPE_DRIVER, 234000, 1920, 2048,
2256, 2600, 0, 1440, 1441, 1444, 1500, 0,
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
/* 1920x1440@75Hz */
{ DRM_MODE("1920x1440", DRM_MODE_TYPE_DRIVER, 297000, 1920, 2064,
2288, 2640, 0, 1440, 1441, 1444, 1500, 0,
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
/* 2560x1600@60Hz */
{ DRM_MODE("2560x1600", DRM_MODE_TYPE_DRIVER, 348500, 2560, 2752,
3032, 3504, 0, 1600, 1603, 1609, 1658, 0,
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
/* 2560x1600@75HZ */
{ DRM_MODE("2560x1600", DRM_MODE_TYPE_DRIVER, 443250, 2560, 2768,
3048, 3536, 0, 1600, 1603, 1609, 1672, 0,
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
/* 2560x1600@85HZ */
{ DRM_MODE("2560x1600", DRM_MODE_TYPE_DRIVER, 505250, 2560, 2768,
3048, 3536, 0, 1600, 1603, 1609, 1682, 0,
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
};
static const int drm_num_dmt_modes =
sizeof(drm_dmt_modes) / sizeof(struct drm_display_mode);
static struct drm_display_mode *drm_find_dmt(struct drm_device *dev,
int hsize, int vsize, int fresh)
{
int i;
struct drm_display_mode *ptr, *mode;
mode = NULL;
for (i = 0; i < drm_num_dmt_modes; i++) {
ptr = &drm_dmt_modes[i];
if (hsize == ptr->hdisplay &&
vsize == ptr->vdisplay &&
fresh == drm_mode_vrefresh(ptr)) {
/* get the expected default mode */
mode = drm_mode_duplicate(dev, ptr);
break;
}
}
return mode;
}
typedef void detailed_cb(struct detailed_timing *timing, void *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);
/* XXX extension block walk */
}
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->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->vsync_start = mode->vsync_start - 1;
mode->vsync_end = mode->vsync_end - 1;
return mode;
}
/* check whether it can be found in default mode table */
mode = drm_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 },
};
static const int n_sizes =
sizeof(cea_interlaced)/sizeof(cea_interlaced[0]);
if (!(pt->misc & DRM_EDID_PT_INTERLACED))
return;
for (i = 0; i < n_sizes; 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_set_name(mode);
drm_mode_do_interlace_quirk(mode, pt);
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;
}
/*
* Detailed mode info for the EDID "established modes" data to use.
*/
static struct drm_display_mode edid_est_modes[] = {
{ DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 40000, 800, 840,
968, 1056, 0, 600, 601, 605, 628, 0,
DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 800x600@60Hz */
{ DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 36000, 800, 824,
896, 1024, 0, 600, 601, 603, 625, 0,
DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 800x600@56Hz */
{ DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 31500, 640, 656,
720, 840, 0, 480, 481, 484, 500, 0,
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 640x480@75Hz */
{ DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 31500, 640, 664,
704, 832, 0, 480, 489, 491, 520, 0,
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 640x480@72Hz */
{ DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 30240, 640, 704,
768, 864, 0, 480, 483, 486, 525, 0,
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 640x480@67Hz */
{ DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 25200, 640, 656,
752, 800, 0, 480, 490, 492, 525, 0,
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 640x480@60Hz */
{ DRM_MODE("720x400", DRM_MODE_TYPE_DRIVER, 35500, 720, 738,
846, 900, 0, 400, 421, 423, 449, 0,
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 720x400@88Hz */
{ DRM_MODE("720x400", DRM_MODE_TYPE_DRIVER, 28320, 720, 738,
846, 900, 0, 400, 412, 414, 449, 0,
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 720x400@70Hz */
{ DRM_MODE("1280x1024", DRM_MODE_TYPE_DRIVER, 135000, 1280, 1296,
1440, 1688, 0, 1024, 1025, 1028, 1066, 0,
DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 1280x1024@75Hz */
{ DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 78800, 1024, 1040,
1136, 1312, 0, 768, 769, 772, 800, 0,
DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 1024x768@75Hz */
{ DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 75000, 1024, 1048,
1184, 1328, 0, 768, 771, 777, 806, 0,
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 1024x768@70Hz */
{ DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 65000, 1024, 1048,
1184, 1344, 0, 768, 771, 777, 806, 0,
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 1024x768@60Hz */
{ DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER,44900, 1024, 1032,
1208, 1264, 0, 768, 768, 776, 817, 0,
DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC | DRM_MODE_FLAG_INTERLACE) }, /* 1024x768@43Hz */
{ DRM_MODE("832x624", DRM_MODE_TYPE_DRIVER, 57284, 832, 864,
928, 1152, 0, 624, 625, 628, 667, 0,
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 832x624@75Hz */
{ 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 */
};
/**
* 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)
{
int i, modes = 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++;
}
}
return modes;
}
static bool
mode_is_rb(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(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(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(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 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 const struct {
short w;
short h;
short r;
short rb;
} est3_modes[] = {
/* byte 6 */
{ 640, 350, 85, 0 },
{ 640, 400, 85, 0 },
{ 720, 400, 85, 0 },
{ 640, 480, 85, 0 },
{ 848, 480, 60, 0 },
{ 800, 600, 85, 0 },
{ 1024, 768, 85, 0 },
{ 1152, 864, 75, 0 },
/* byte 7 */
{ 1280, 768, 60, 1 },
{ 1280, 768, 60, 0 },
{ 1280, 768, 75, 0 },
{ 1280, 768, 85, 0 },
{ 1280, 960, 60, 0 },
{ 1280, 960, 85, 0 },
{ 1280, 1024, 60, 0 },
{ 1280, 1024, 85, 0 },
/* byte 8 */
{ 1360, 768, 60, 0 },
{ 1440, 900, 60, 1 },
{ 1440, 900, 60, 0 },
{ 1440, 900, 75, 0 },
{ 1440, 900, 85, 0 },
{ 1400, 1050, 60, 1 },
{ 1400, 1050, 60, 0 },
{ 1400, 1050, 75, 0 },
/* byte 9 */
{ 1400, 1050, 85, 0 },
{ 1680, 1050, 60, 1 },
{ 1680, 1050, 60, 0 },
{ 1680, 1050, 75, 0 },
{ 1680, 1050, 85, 0 },
{ 1600, 1200, 60, 0 },
{ 1600, 1200, 65, 0 },
{ 1600, 1200, 70, 0 },
/* byte 10 */
{ 1600, 1200, 75, 0 },
{ 1600, 1200, 85, 0 },
{ 1792, 1344, 60, 0 },
{ 1792, 1344, 85, 0 },
{ 1856, 1392, 60, 0 },
{ 1856, 1392, 75, 0 },
{ 1920, 1200, 60, 1 },
{ 1920, 1200, 60, 0 },
/* byte 11 */
{ 1920, 1200, 75, 0 },
{ 1920, 1200, 85, 0 },
{ 1920, 1440, 60, 0 },
{ 1920, 1440, 75, 0 },
};
static const int num_est3_modes = sizeof(est3_modes) / sizeof(est3_modes[0]);
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 > num_est3_modes)
break;
if (est[i] & (1 << j)) {
mode = drm_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 int add_detailed_modes(struct drm_connector *connector,
struct detailed_timing *timing,
struct edid *edid, u32 quirks, int preferred)
{
int i, modes = 0;
struct detailed_non_pixel *data = &timing->data.other_data;
int gtf = (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF);
struct drm_display_mode *newmode;
struct drm_device *dev = connector->dev;
if (timing->pixel_clock) {
newmode = drm_mode_detailed(dev, edid, timing, quirks);
if (!newmode)
return 0;
if (preferred)
newmode->type |= DRM_MODE_TYPE_PREFERRED;
drm_mode_probed_add(connector, newmode);
return 1;
}
/* other timing types */
switch (data->type) {
case EDID_DETAIL_MONITOR_RANGE:
if (gtf)
modes += drm_gtf_modes_for_range(connector, edid,
timing);
break;
case EDID_DETAIL_STD_MODES:
/* Six modes per detailed section */
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);
modes++;
}
}
break;
case EDID_DETAIL_CVT_3BYTE:
modes += drm_cvt_modes(connector, timing);
break;
case EDID_DETAIL_EST_TIMINGS:
modes += drm_est3_modes(connector, timing);
break;
default:
break;
}
return modes;
}
/**
* add_detailed_info - 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)
{
int i, modes = 0;
for (i = 0; i < EDID_DETAILED_TIMINGS; i++) {
struct detailed_timing *timing = &edid->detailed_timings[i];
int preferred = (i == 0);
if (preferred && edid->version == 1 && edid->revision < 4)
preferred = (edid->features & DRM_EDID_FEATURE_PREFERRED_TIMING);
/* In 1.0, only timings are allowed */
if (!timing->pixel_clock && edid->version == 1 &&
edid->revision == 0)
continue;
modes += add_detailed_modes(connector, timing, edid, quirks,
preferred);
}
return modes;
}
/**
* add_detailed_mode_eedid - get detailed mode info from addtional timing
* EDID block
* @connector: attached connector
* @edid: EDID block to scan(It is only to get addtional timing EDID block)
* @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_eedid(struct drm_connector *connector,
struct edid *edid, u32 quirks)
{
int i, modes = 0;
char *edid_ext = NULL;
struct detailed_timing *timing;
int start_offset, end_offset;
int timing_level;
if (edid->version == 1 && edid->revision < 3)
return 0;
if (!edid->extensions)
return 0;
/* Find CEA extension */
for (i = 0; i < edid->extensions; i++) {
edid_ext = (char *)edid + EDID_LENGTH * (i + 1);
if (edid_ext[0] == 0x02)
break;
}
if (i == edid->extensions)
return 0;
/* Get the start offset of detailed timing block */
start_offset = edid_ext[2];
if (start_offset == 0) {
/* If the start_offset is zero, it means that neither detailed
* info nor data block exist. In such case it is also
* unnecessary to parse the detailed timing info.
*/
return 0;
}
timing_level = standard_timing_level(edid);
end_offset = EDID_LENGTH;
end_offset -= sizeof(struct detailed_timing);
for (i = start_offset; i < end_offset;
i += sizeof(struct detailed_timing)) {
timing = (struct detailed_timing *)(edid_ext + i);
modes += add_detailed_modes(connector, timing, edid, quirks, 0);
}
return modes;
}
#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;
int start_offset, end_offset;
bool is_hdmi = false;
/* No EDID or EDID extensions */
if (edid == NULL || edid->extensions == 0)
goto end;
/* Find CEA extension */
for (i = 0; i < edid->extensions; i++) {
edid_ext = (char *)edid + EDID_LENGTH * (i + 1);
/* This block is CEA extension */
if (edid_ext[0] == 0x02)
break;
}
if (i == edid->extensions)
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 (!drm_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);
/*
* 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 don't quite implement this yet, but we're close.
*
* XXX order for additional mode types in extension blocks?
*/
num_modes += add_detailed_info(connector, edid, quirks);
num_modes += add_detailed_info_eedid(connector, edid, quirks);
num_modes += add_standard_modes(connector, edid);
num_modes += add_established_modes(connector, edid);
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);
/**
* 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, *ptr;
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++) {
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);
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