0,0 → 1,797 |
/* |
* Copyright (c) 2006 Luc Verhaegen (quirks list) |
* Copyright (c) 2007-2008 Intel Corporation |
* Jesse Barnes <jesse.barnes@intel.com> |
* |
* 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" |
|
|
|
|
/* |
* TODO: |
* - support EDID 1.4 (incl. CE blocks) |
*/ |
|
/* |
* 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) |
|
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 }, |
}; |
|
|
/* Valid EDID header has these bytes */ |
static u8 edid_header[] = { 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 }; |
|
/** |
* edid_is_valid - sanity check EDID data |
* @edid: EDID data |
* |
* Sanity check the EDID block by looking at the header, the version number |
* and the checksum. Return 0 if the EDID doesn't check out, or 1 if it's |
* valid. |
*/ |
static bool edid_is_valid(struct edid *edid) |
{ |
int i; |
u8 csum = 0; |
u8 *raw_edid = (u8 *)edid; |
|
if (memcmp(edid->header, edid_header, sizeof(edid_header))) |
goto bad; |
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"); |
|
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; |
} |
|
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; |
} |
|
/** |
* 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; |
} |
|
/** |
* drm_mode_std - convert standard mode info (width, height, refresh) into mode |
* @t: standard timing params |
* |
* Take the standard timing params (in this case width, aspect, and refresh) |
* and convert them into a real mode using CVT. |
* |
* Punts for now, but should eventually use the FB layer's CVT based mode |
* generation code. |
*/ |
struct drm_display_mode *drm_mode_std(struct drm_device *dev, |
struct std_timing *t) |
{ |
struct drm_display_mode *mode; |
int hsize = t->hsize * 8 + 248, vsize; |
unsigned aspect_ratio = (t->vfreq_aspect & EDID_TIMING_ASPECT_MASK) |
>> EDID_TIMING_ASPECT_SHIFT; |
|
mode = drm_mode_create(dev); |
if (!mode) |
return NULL; |
|
if (aspect_ratio == 0) |
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; |
|
drm_mode_set_name(mode); |
|
return mode; |
} |
|
/** |
* 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 "integrated sync not supported\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; |
|
drm_mode_set_name(mode); |
|
if (pt->misc & DRM_EDID_PT_INTERLACED) |
mode->flags |= DRM_MODE_FLAG_INTERLACE; |
|
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 */ |
}; |
|
#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); |