30,8 → 30,9 |
#include <linux/kernel.h> |
#include <linux/slab.h> |
#include <linux/i2c.h> |
#include "drmP.h" |
#include "drm_edid.h" |
#include <linux/module.h> |
#include <drm/drmP.h> |
#include <drm/drm_edid.h> |
#include "drm_edid_modes.h" |
|
#define version_greater(edid, maj, min) \ |
65,6 → 66,8 |
#define EDID_QUIRK_FIRST_DETAILED_PREFERRED (1 << 5) |
/* use +hsync +vsync for detailed mode */ |
#define EDID_QUIRK_DETAILED_SYNC_PP (1 << 6) |
/* Force reduced-blanking timings for detailed modes */ |
#define EDID_QUIRK_FORCE_REDUCED_BLANKING (1 << 7) |
|
struct detailed_mode_closure { |
struct drm_connector *connector; |
80,10 → 83,13 |
#define LEVEL_CVT 3 |
|
static struct edid_quirk { |
char *vendor; |
char vendor[4]; |
int product_id; |
u32 quirks; |
} edid_quirk_list[] = { |
/* ASUS VW222S */ |
{ "ACI", 0x22a2, EDID_QUIRK_FORCE_REDUCED_BLANKING }, |
|
/* Acer AL1706 */ |
{ "ACR", 44358, EDID_QUIRK_PREFER_LARGE_60 }, |
/* Acer F51 */ |
119,6 → 125,9 |
/* Samsung SyncMaster 22[5-6]BW */ |
{ "SAM", 596, EDID_QUIRK_PREFER_LARGE_60 }, |
{ "SAM", 638, EDID_QUIRK_PREFER_LARGE_60 }, |
|
/* ViewSonic VA2026w */ |
{ "VSC", 5020, EDID_QUIRK_FORCE_REDUCED_BLANKING }, |
}; |
|
/*** DDC fetch and block validation ***/ |
143,22 → 152,28 |
} |
EXPORT_SYMBOL(drm_edid_header_is_valid); |
|
static int edid_fixup __read_mostly = 6; |
//module_param_named(edid_fixup, edid_fixup, int, 0400); |
//MODULE_PARM_DESC(edid_fixup, |
// "Minimum number of valid EDID header bytes (0-8, default 6)"); |
|
/* |
* 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) |
bool drm_edid_block_valid(u8 *raw_edid, int block, bool print_bad_edid) |
{ |
int i; |
u8 csum = 0; |
struct edid *edid = (struct edid *)raw_edid; |
|
if (raw_edid[0] == 0x00) { |
if (edid_fixup > 8 || edid_fixup < 0) |
edid_fixup = 6; |
|
if (block == 0) { |
int score = drm_edid_header_is_valid(raw_edid); |
if (score == 8) ; |
else if (score >= 6) { |
else if (score >= edid_fixup) { |
DRM_DEBUG("Fixing EDID header, your hardware may be failing\n"); |
memcpy(raw_edid, edid_header, sizeof(edid_header)); |
} else { |
201,6 → 216,7 |
} |
return 0; |
} |
EXPORT_SYMBOL(drm_edid_block_valid); |
|
/** |
* drm_edid_is_valid - sanity check EDID data |
217,7 → 233,7 |
return false; |
|
for (i = 0; i <= edid->extensions; i++) |
if (!drm_edid_block_valid(raw + i * EDID_LENGTH)) |
if (!drm_edid_block_valid(raw + i * EDID_LENGTH, i, true)) |
return false; |
|
return true; |
224,7 → 240,6 |
} |
EXPORT_SYMBOL(drm_edid_is_valid); |
|
#define DDC_ADDR 0x50 |
#define DDC_SEGMENT_ADDR 0x30 |
/** |
* Get EDID information via I2C. |
241,6 → 256,8 |
int block, int len) |
{ |
unsigned char start = block * EDID_LENGTH; |
unsigned char segment = block >> 1; |
unsigned char xfers = segment ? 3 : 2; |
int ret, retries = 5; |
|
/* The core i2c driver will automatically retry the transfer if the |
252,6 → 269,11 |
do { |
struct i2c_msg msgs[] = { |
{ |
.addr = DDC_SEGMENT_ADDR, |
.flags = 0, |
.len = 1, |
.buf = &segment, |
}, { |
.addr = DDC_ADDR, |
.flags = 0, |
.len = 1, |
263,12 → 285,23 |
.buf = buf, |
} |
}; |
ret = i2c_transfer(adapter, msgs, 2); |
} while (ret != 2 && --retries); |
|
return ret == 2 ? 0 : -1; |
/* |
* Avoid sending the segment addr to not upset non-compliant ddc |
* monitors. |
*/ |
ret = i2c_transfer(adapter, &msgs[3 - xfers], xfers); |
|
if (ret == -ENXIO) { |
DRM_DEBUG_KMS("drm: skipping non-existent adapter %s\n", |
adapter->name); |
break; |
} |
} while (ret != xfers && --retries); |
|
return ret == xfers ? 0 : -1; |
} |
|
static bool drm_edid_is_zero(u8 *in_edid, int length) |
{ |
int i; |
283,9 → 316,10 |
static u8 * |
drm_do_get_edid(struct drm_connector *connector, struct i2c_adapter *adapter) |
{ |
size_t alloc_size; |
int i, j = 0, valid_extensions = 0; |
u8 *block, *new; |
size_t alloc_size; |
bool print_bad_edid = !connector->bad_edid_counter || (drm_debug & DRM_UT_KMS); |
|
if ((block = kmalloc(EDID_LENGTH, GFP_KERNEL)) == NULL) |
return NULL; |
294,7 → 328,7 |
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)) |
if (drm_edid_block_valid(block, 0, print_bad_edid)) |
break; |
if (i == 0 && drm_edid_is_zero(block, EDID_LENGTH)) { |
connector->null_edid_counter++; |
326,7 → 360,7 |
block + (valid_extensions + 1) * EDID_LENGTH, |
j, EDID_LENGTH)) |
goto out; |
if (drm_edid_block_valid(block + (valid_extensions + 1) * EDID_LENGTH)) { |
if (drm_edid_block_valid(block + (valid_extensions + 1) * EDID_LENGTH, j, print_bad_edid)) { |
valid_extensions++; |
break; |
} |
351,8 → 385,11 |
return block; |
|
carp: |
if (print_bad_edid) { |
dev_warn(connector->dev->dev, "%s: EDID block %d invalid.\n", |
drm_get_connector_name(connector), j); |
} |
connector->bad_edid_counter++; |
|
out: |
kfree(block); |
365,7 → 402,7 |
* \param adapter : i2c device adaptor |
* \return 1 on success |
*/ |
static bool |
bool |
drm_probe_ddc(struct i2c_adapter *adapter) |
{ |
unsigned char out; |
372,6 → 409,7 |
|
return (drm_do_probe_ddc_edid(adapter, &out, 0, 1) == 0); |
} |
EXPORT_SYMBOL(drm_probe_ddc); |
|
/** |
* drm_get_edid - get EDID data, if available |
391,10 → 429,7 |
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); |
|
490,24 → 525,48 |
preferred_mode->type |= DRM_MODE_TYPE_PREFERRED; |
} |
|
static bool |
mode_is_rb(const struct drm_display_mode *mode) |
{ |
return (mode->htotal - mode->hdisplay == 160) && |
(mode->hsync_end - mode->hdisplay == 80) && |
(mode->hsync_end - mode->hsync_start == 32) && |
(mode->vsync_start - mode->vdisplay == 3); |
} |
|
/* |
* drm_mode_find_dmt - Create a copy of a mode if present in DMT |
* @dev: Device to duplicate against |
* @hsize: Mode width |
* @vsize: Mode height |
* @fresh: Mode refresh rate |
* @rb: Mode reduced-blanking-ness |
* |
* Walk the DMT mode list looking for a match for the given parameters. |
* Return a newly allocated copy of the mode, or NULL if not found. |
*/ |
struct drm_display_mode *drm_mode_find_dmt(struct drm_device *dev, |
int hsize, int vsize, int fresh) |
int hsize, int vsize, int fresh, |
bool rb) |
{ |
struct drm_display_mode *mode = NULL; |
int i; |
|
for (i = 0; i < drm_num_dmt_modes; i++) { |
const struct drm_display_mode *ptr = &drm_dmt_modes[i]; |
if (hsize == ptr->hdisplay && |
vsize == ptr->vdisplay && |
fresh == drm_mode_vrefresh(ptr)) { |
/* get the expected default mode */ |
mode = drm_mode_duplicate(dev, ptr); |
break; |
if (hsize != ptr->hdisplay) |
continue; |
if (vsize != ptr->vdisplay) |
continue; |
if (fresh != drm_mode_vrefresh(ptr)) |
continue; |
if (rb != mode_is_rb(ptr)) |
continue; |
|
return drm_mode_duplicate(dev, ptr); |
} |
|
return NULL; |
} |
return mode; |
} |
EXPORT_SYMBOL(drm_mode_find_dmt); |
|
typedef void detailed_cb(struct detailed_timing *timing, void *closure); |
516,25 → 575,10 |
cea_for_each_detailed_block(u8 *ext, detailed_cb *cb, void *closure) |
{ |
int i, n = 0; |
u8 rev = ext[0x01], d = ext[0x02]; |
u8 d = ext[0x02]; |
u8 *det_base = ext + d; |
|
switch (rev) { |
case 0: |
/* can't happen */ |
return; |
case 1: |
/* have to infer how many blocks we have, check pixel clock */ |
for (i = 0; i < 6; i++) |
if (det_base[18*i] || det_base[18*i+1]) |
n++; |
break; |
default: |
/* explicit count */ |
n = min(ext[0x03] & 0x0f, 6); |
break; |
} |
|
n = (127 - d) / 18; |
for (i = 0; i < n; i++) |
cb((struct detailed_timing *)(det_base + 18 * i), closure); |
} |
593,7 → 637,7 |
drm_monitor_supports_rb(struct edid *edid) |
{ |
if (edid->revision >= 4) { |
bool ret; |
bool ret = false; |
drm_for_each_detailed_block((u8 *)edid, is_rb, &ret); |
return ret; |
} |
750,10 → 794,17 |
} |
|
/* check whether it can be found in default mode table */ |
mode = drm_mode_find_dmt(dev, hsize, vsize, vrefresh_rate); |
if (drm_monitor_supports_rb(edid)) { |
mode = drm_mode_find_dmt(dev, hsize, vsize, vrefresh_rate, |
true); |
if (mode) |
return mode; |
} |
mode = drm_mode_find_dmt(dev, hsize, vsize, vrefresh_rate, false); |
if (mode) |
return mode; |
|
/* okay, generate it */ |
switch (timing_level) { |
case LEVEL_DMT: |
break; |
767,8 → 818,10 |
* secondary GTF curve. Please don't do that. |
*/ |
mode = drm_gtf_mode(dev, hsize, vsize, vrefresh_rate, 0, 0); |
if (!mode) |
return NULL; |
if (drm_mode_hsync(mode) > drm_gtf2_hbreak(edid)) { |
kfree(mode); |
drm_mode_destroy(dev, mode); |
mode = drm_gtf_mode_complex(dev, hsize, vsize, |
vrefresh_rate, 0, 0, |
drm_gtf2_m(edid), |
871,12 → 924,19 |
"Wrong Hsync/Vsync pulse width\n"); |
return NULL; |
} |
|
if (quirks & EDID_QUIRK_FORCE_REDUCED_BLANKING) { |
mode = drm_cvt_mode(dev, hactive, vactive, 60, true, false, false); |
if (!mode) |
return NULL; |
|
goto set_size; |
} |
|
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); |
|
900,8 → 960,6 |
|
drm_mode_do_interlace_quirk(mode, pt); |
|
drm_mode_set_name(mode); |
|
if (quirks & EDID_QUIRK_DETAILED_SYNC_PP) { |
pt->misc |= DRM_EDID_PT_HSYNC_POSITIVE | DRM_EDID_PT_VSYNC_POSITIVE; |
} |
911,6 → 969,7 |
mode->flags |= (pt->misc & DRM_EDID_PT_VSYNC_POSITIVE) ? |
DRM_MODE_FLAG_PVSYNC : DRM_MODE_FLAG_NVSYNC; |
|
set_size: |
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; |
|
924,19 → 983,13 |
mode->height_mm = edid->height_cm * 10; |
} |
|
mode->type = DRM_MODE_TYPE_DRIVER; |
drm_mode_set_name(mode); |
|
return mode; |
} |
|
static bool |
mode_is_rb(const struct drm_display_mode *mode) |
{ |
return (mode->htotal - mode->hdisplay == 160) && |
(mode->hsync_end - mode->hdisplay == 80) && |
(mode->hsync_end - mode->hsync_start == 32) && |
(mode->vsync_start - mode->vdisplay == 3); |
} |
|
static bool |
mode_in_hsync_range(const struct drm_display_mode *mode, |
struct edid *edid, u8 *t) |
{ |
1013,12 → 1066,26 |
return true; |
} |
|
/* |
* XXX If drm_dmt_modes ever regrows the CVT-R modes (and it will) this will |
* need to account for them. |
*/ |
static bool valid_inferred_mode(const struct drm_connector *connector, |
const struct drm_display_mode *mode) |
{ |
struct drm_display_mode *m; |
bool ok = false; |
|
list_for_each_entry(m, &connector->probed_modes, head) { |
if (mode->hdisplay == m->hdisplay && |
mode->vdisplay == m->vdisplay && |
drm_mode_vrefresh(mode) == drm_mode_vrefresh(m)) |
return false; /* duplicated */ |
if (mode->hdisplay <= m->hdisplay && |
mode->vdisplay <= m->vdisplay) |
ok = true; |
} |
return ok; |
} |
|
static int |
drm_gtf_modes_for_range(struct drm_connector *connector, struct edid *edid, |
drm_dmt_modes_for_range(struct drm_connector *connector, struct edid *edid, |
struct detailed_timing *timing) |
{ |
int i, modes = 0; |
1026,7 → 1093,8 |
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)) { |
if (mode_in_range(drm_dmt_modes + i, edid, timing) && |
valid_inferred_mode(connector, drm_dmt_modes + i)) { |
newmode = drm_mode_duplicate(dev, &drm_dmt_modes[i]); |
if (newmode) { |
drm_mode_probed_add(connector, newmode); |
1038,18 → 1106,113 |
return modes; |
} |
|
/* fix up 1366x768 mode from 1368x768; |
* GFT/CVT can't express 1366 width which isn't dividable by 8 |
*/ |
static void fixup_mode_1366x768(struct drm_display_mode *mode) |
{ |
if (mode->hdisplay == 1368 && mode->vdisplay == 768) { |
mode->hdisplay = 1366; |
mode->hsync_start--; |
mode->hsync_end--; |
drm_mode_set_name(mode); |
} |
} |
|
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 < num_extra_modes; i++) { |
const struct minimode *m = &extra_modes[i]; |
newmode = drm_gtf_mode(dev, m->w, m->h, m->r, 0, 0); |
if (!newmode) |
return modes; |
|
fixup_mode_1366x768(newmode); |
if (!mode_in_range(newmode, edid, timing) || |
!valid_inferred_mode(connector, newmode)) { |
drm_mode_destroy(dev, newmode); |
continue; |
} |
|
drm_mode_probed_add(connector, newmode); |
modes++; |
} |
|
return modes; |
} |
|
static int |
drm_cvt_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; |
bool rb = drm_monitor_supports_rb(edid); |
|
for (i = 0; i < num_extra_modes; i++) { |
const struct minimode *m = &extra_modes[i]; |
newmode = drm_cvt_mode(dev, m->w, m->h, m->r, rb, 0, 0); |
if (!newmode) |
return modes; |
|
fixup_mode_1366x768(newmode); |
if (!mode_in_range(newmode, edid, timing) || |
!valid_inferred_mode(connector, newmode)) { |
drm_mode_destroy(dev, newmode); |
continue; |
} |
|
drm_mode_probed_add(connector, newmode); |
modes++; |
} |
|
return modes; |
} |
|
static void |
do_inferred_modes(struct detailed_timing *timing, void *c) |
{ |
struct detailed_mode_closure *closure = c; |
struct detailed_non_pixel *data = &timing->data.other_data; |
int gtf = (closure->edid->features & DRM_EDID_FEATURE_DEFAULT_GTF); |
struct detailed_data_monitor_range *range = &data->data.range; |
|
if (gtf && data->type == EDID_DETAIL_MONITOR_RANGE) |
if (data->type != EDID_DETAIL_MONITOR_RANGE) |
return; |
|
closure->modes += drm_dmt_modes_for_range(closure->connector, |
closure->edid, |
timing); |
|
if (!version_greater(closure->edid, 1, 1)) |
return; /* GTF not defined yet */ |
|
switch (range->flags) { |
case 0x02: /* secondary gtf, XXX could do more */ |
case 0x00: /* default gtf */ |
closure->modes += drm_gtf_modes_for_range(closure->connector, |
closure->edid, |
timing); |
break; |
case 0x04: /* cvt, only in 1.4+ */ |
if (!version_greater(closure->edid, 1, 3)) |
break; |
|
closure->modes += drm_cvt_modes_for_range(closure->connector, |
closure->edid, |
timing); |
break; |
case 0x01: /* just the ranges, no formula */ |
default: |
break; |
} |
} |
|
static int |
add_inferred_modes(struct drm_connector *connector, struct edid *edid) |
1081,8 → 1244,8 |
mode = drm_mode_find_dmt(connector->dev, |
est3_modes[m].w, |
est3_modes[m].h, |
est3_modes[m].r |
/*, est3_modes[m].rb */); |
est3_modes[m].r, |
est3_modes[m].rb); |
if (mode) { |
drm_mode_probed_add(connector, mode); |
modes++; |
1327,8 → 1490,12 |
|
#define HDMI_IDENTIFIER 0x000C03 |
#define AUDIO_BLOCK 0x01 |
#define VIDEO_BLOCK 0x02 |
#define VENDOR_BLOCK 0x03 |
#define SPEAKER_BLOCK 0x04 |
#define EDID_BASIC_AUDIO (1 << 6) |
#define EDID_CEA_YCRCB444 (1 << 5) |
#define EDID_CEA_YCRCB422 (1 << 4) |
|
/** |
* Search EDID for CEA extension block. |
1356,7 → 1523,297 |
} |
EXPORT_SYMBOL(drm_find_cea_extension); |
|
static int |
do_cea_modes (struct drm_connector *connector, u8 *db, u8 len) |
{ |
struct drm_device *dev = connector->dev; |
u8 * mode, cea_mode; |
int modes = 0; |
|
for (mode = db; mode < db + len; mode++) { |
cea_mode = (*mode & 127) - 1; /* CEA modes are numbered 1..127 */ |
if (cea_mode < drm_num_cea_modes) { |
struct drm_display_mode *newmode; |
newmode = drm_mode_duplicate(dev, |
&edid_cea_modes[cea_mode]); |
if (newmode) { |
drm_mode_probed_add(connector, newmode); |
modes++; |
} |
} |
} |
|
return modes; |
} |
|
static int |
cea_db_payload_len(const u8 *db) |
{ |
return db[0] & 0x1f; |
} |
|
static int |
cea_db_tag(const u8 *db) |
{ |
return db[0] >> 5; |
} |
|
static int |
cea_revision(const u8 *cea) |
{ |
return cea[1]; |
} |
|
static int |
cea_db_offsets(const u8 *cea, int *start, int *end) |
{ |
/* Data block offset in CEA extension block */ |
*start = 4; |
*end = cea[2]; |
if (*end == 0) |
*end = 127; |
if (*end < 4 || *end > 127) |
return -ERANGE; |
return 0; |
} |
|
#define for_each_cea_db(cea, i, start, end) \ |
for ((i) = (start); (i) < (end) && (i) + cea_db_payload_len(&(cea)[(i)]) < (end); (i) += cea_db_payload_len(&(cea)[(i)]) + 1) |
|
static int |
add_cea_modes(struct drm_connector *connector, struct edid *edid) |
{ |
u8 * cea = drm_find_cea_extension(edid); |
u8 * db, dbl; |
int modes = 0; |
|
if (cea && cea_revision(cea) >= 3) { |
int i, start, end; |
|
if (cea_db_offsets(cea, &start, &end)) |
return 0; |
|
for_each_cea_db(cea, i, start, end) { |
db = &cea[i]; |
dbl = cea_db_payload_len(db); |
|
if (cea_db_tag(db) == VIDEO_BLOCK) |
modes += do_cea_modes (connector, db+1, dbl); |
} |
} |
|
return modes; |
} |
|
static void |
parse_hdmi_vsdb(struct drm_connector *connector, const u8 *db) |
{ |
u8 len = cea_db_payload_len(db); |
|
if (len >= 6) { |
connector->eld[5] |= (db[6] >> 7) << 1; /* Supports_AI */ |
connector->dvi_dual = db[6] & 1; |
} |
if (len >= 7) |
connector->max_tmds_clock = db[7] * 5; |
if (len >= 8) { |
connector->latency_present[0] = db[8] >> 7; |
connector->latency_present[1] = (db[8] >> 6) & 1; |
} |
if (len >= 9) |
connector->video_latency[0] = db[9]; |
if (len >= 10) |
connector->audio_latency[0] = db[10]; |
if (len >= 11) |
connector->video_latency[1] = db[11]; |
if (len >= 12) |
connector->audio_latency[1] = db[12]; |
|
DRM_LOG_KMS("HDMI: DVI dual %d, " |
"max TMDS clock %d, " |
"latency present %d %d, " |
"video latency %d %d, " |
"audio latency %d %d\n", |
connector->dvi_dual, |
connector->max_tmds_clock, |
(int) connector->latency_present[0], |
(int) connector->latency_present[1], |
connector->video_latency[0], |
connector->video_latency[1], |
connector->audio_latency[0], |
connector->audio_latency[1]); |
} |
|
static void |
monitor_name(struct detailed_timing *t, void *data) |
{ |
if (t->data.other_data.type == EDID_DETAIL_MONITOR_NAME) |
*(u8 **)data = t->data.other_data.data.str.str; |
} |
|
static bool cea_db_is_hdmi_vsdb(const u8 *db) |
{ |
int hdmi_id; |
|
if (cea_db_tag(db) != VENDOR_BLOCK) |
return false; |
|
if (cea_db_payload_len(db) < 5) |
return false; |
|
hdmi_id = db[1] | (db[2] << 8) | (db[3] << 16); |
|
return hdmi_id == HDMI_IDENTIFIER; |
} |
|
/** |
* drm_edid_to_eld - build ELD from EDID |
* @connector: connector corresponding to the HDMI/DP sink |
* @edid: EDID to parse |
* |
* Fill the ELD (EDID-Like Data) buffer for passing to the audio driver. |
* Some ELD fields are left to the graphics driver caller: |
* - Conn_Type |
* - HDCP |
* - Port_ID |
*/ |
void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid) |
{ |
uint8_t *eld = connector->eld; |
u8 *cea; |
u8 *name; |
u8 *db; |
int sad_count = 0; |
int mnl; |
int dbl; |
|
memset(eld, 0, sizeof(connector->eld)); |
|
cea = drm_find_cea_extension(edid); |
if (!cea) { |
DRM_DEBUG_KMS("ELD: no CEA Extension found\n"); |
return; |
} |
|
name = NULL; |
drm_for_each_detailed_block((u8 *)edid, monitor_name, &name); |
for (mnl = 0; name && mnl < 13; mnl++) { |
if (name[mnl] == 0x0a) |
break; |
eld[20 + mnl] = name[mnl]; |
} |
eld[4] = (cea[1] << 5) | mnl; |
DRM_DEBUG_KMS("ELD monitor %s\n", eld + 20); |
|
eld[0] = 2 << 3; /* ELD version: 2 */ |
|
eld[16] = edid->mfg_id[0]; |
eld[17] = edid->mfg_id[1]; |
eld[18] = edid->prod_code[0]; |
eld[19] = edid->prod_code[1]; |
|
if (cea_revision(cea) >= 3) { |
int i, start, end; |
|
if (cea_db_offsets(cea, &start, &end)) { |
start = 0; |
end = 0; |
} |
|
for_each_cea_db(cea, i, start, end) { |
db = &cea[i]; |
dbl = cea_db_payload_len(db); |
|
switch (cea_db_tag(db)) { |
case AUDIO_BLOCK: |
/* Audio Data Block, contains SADs */ |
sad_count = dbl / 3; |
if (dbl >= 1) |
memcpy(eld + 20 + mnl, &db[1], dbl); |
break; |
case SPEAKER_BLOCK: |
/* Speaker Allocation Data Block */ |
if (dbl >= 1) |
eld[7] = db[1]; |
break; |
case VENDOR_BLOCK: |
/* HDMI Vendor-Specific Data Block */ |
if (cea_db_is_hdmi_vsdb(db)) |
parse_hdmi_vsdb(connector, db); |
break; |
default: |
break; |
} |
} |
} |
eld[5] |= sad_count << 4; |
eld[2] = (20 + mnl + sad_count * 3 + 3) / 4; |
|
DRM_DEBUG_KMS("ELD size %d, SAD count %d\n", (int)eld[2], sad_count); |
} |
EXPORT_SYMBOL(drm_edid_to_eld); |
|
/** |
* drm_av_sync_delay - HDMI/DP sink audio-video sync delay in millisecond |
* @connector: connector associated with the HDMI/DP sink |
* @mode: the display mode |
*/ |
int drm_av_sync_delay(struct drm_connector *connector, |
struct drm_display_mode *mode) |
{ |
int i = !!(mode->flags & DRM_MODE_FLAG_INTERLACE); |
int a, v; |
|
if (!connector->latency_present[0]) |
return 0; |
if (!connector->latency_present[1]) |
i = 0; |
|
a = connector->audio_latency[i]; |
v = connector->video_latency[i]; |
|
/* |
* HDMI/DP sink doesn't support audio or video? |
*/ |
if (a == 255 || v == 255) |
return 0; |
|
/* |
* Convert raw EDID values to millisecond. |
* Treat unknown latency as 0ms. |
*/ |
if (a) |
a = min(2 * (a - 1), 500); |
if (v) |
v = min(2 * (v - 1), 500); |
|
return max(v - a, 0); |
} |
EXPORT_SYMBOL(drm_av_sync_delay); |
|
/** |
* drm_select_eld - select one ELD from multiple HDMI/DP sinks |
* @encoder: the encoder just changed display mode |
* @mode: the adjusted display mode |
* |
* It's possible for one encoder to be associated with multiple HDMI/DP sinks. |
* The policy is now hard coded to simply use the first HDMI/DP sink's ELD. |
*/ |
struct drm_connector *drm_select_eld(struct drm_encoder *encoder, |
struct drm_display_mode *mode) |
{ |
struct drm_connector *connector; |
struct drm_device *dev = encoder->dev; |
|
list_for_each_entry(connector, &dev->mode_config.connector_list, head) |
if (connector->encoder == encoder && connector->eld[0]) |
return connector; |
|
return NULL; |
} |
EXPORT_SYMBOL(drm_select_eld); |
|
/** |
* drm_detect_hdmi_monitor - detect whether monitor is hdmi. |
* @edid: monitor EDID information |
* |
1366,38 → 1823,26 |
bool drm_detect_hdmi_monitor(struct edid *edid) |
{ |
u8 *edid_ext; |
int i, hdmi_id; |
int i; |
int start_offset, end_offset; |
bool is_hdmi = false; |
|
edid_ext = drm_find_cea_extension(edid); |
if (!edid_ext) |
goto end; |
return false; |
|
/* Data block offset in CEA extension block */ |
start_offset = 4; |
end_offset = edid_ext[2]; |
if (cea_db_offsets(edid_ext, &start_offset, &end_offset)) |
return false; |
|
/* |
* 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; |
for_each_cea_db(edid_ext, i, start_offset, end_offset) { |
if (cea_db_is_hdmi_vsdb(&edid_ext[i])) |
return true; |
} |
} |
|
end: |
return is_hdmi; |
return false; |
} |
EXPORT_SYMBOL(drm_detect_hdmi_monitor); |
|
1429,15 → 1874,13 |
goto end; |
} |
|
/* Data block offset in CEA extension block */ |
start_offset = 4; |
end_offset = edid_ext[2]; |
if (cea_db_offsets(edid_ext, &start_offset, &end_offset)) |
goto end; |
|
for (i = start_offset; i < end_offset; |
i += ((edid_ext[i] & 0x1f) + 1)) { |
if ((edid_ext[i] >> 5) == AUDIO_BLOCK) { |
for_each_cea_db(edid_ext, i, start_offset, end_offset) { |
if (cea_db_tag(&edid_ext[i]) == AUDIO_BLOCK) { |
has_audio = true; |
for (j = 1; j < (edid_ext[i] & 0x1f); j += 3) |
for (j = 1; j < cea_db_payload_len(&edid_ext[i]) + 1; j += 3) |
DRM_DEBUG_KMS("CEA audio format %d\n", |
(edid_ext[i + j] >> 3) & 0xf); |
goto end; |
1469,13 → 1912,29 |
info->bpc = 0; |
info->color_formats = 0; |
|
/* Only defined for 1.4 with digital displays */ |
if (edid->revision < 4) |
if (edid->revision < 3) |
return; |
|
if (!(edid->input & DRM_EDID_INPUT_DIGITAL)) |
return; |
|
/* Get data from CEA blocks if present */ |
edid_ext = drm_find_cea_extension(edid); |
if (edid_ext) { |
info->cea_rev = edid_ext[1]; |
|
/* The existence of a CEA block should imply RGB support */ |
info->color_formats = DRM_COLOR_FORMAT_RGB444; |
if (edid_ext[3] & EDID_CEA_YCRCB444) |
info->color_formats |= DRM_COLOR_FORMAT_YCRCB444; |
if (edid_ext[3] & EDID_CEA_YCRCB422) |
info->color_formats |= DRM_COLOR_FORMAT_YCRCB422; |
} |
|
/* Only defined for 1.4 with digital displays */ |
if (edid->revision < 4) |
return; |
|
switch (edid->input & DRM_EDID_DIGITAL_DEPTH_MASK) { |
case DRM_EDID_DIGITAL_DEPTH_6: |
info->bpc = 6; |
1501,18 → 1960,11 |
break; |
} |
|
info->color_formats = DRM_COLOR_FORMAT_RGB444; |
if (info->color_formats & DRM_EDID_FEATURE_RGB_YCRCB444) |
info->color_formats = DRM_COLOR_FORMAT_YCRCB444; |
if (info->color_formats & DRM_EDID_FEATURE_RGB_YCRCB422) |
info->color_formats = DRM_COLOR_FORMAT_YCRCB422; |
|
/* Get data from CEA blocks if present */ |
edid_ext = drm_find_cea_extension(edid); |
if (!edid_ext) |
return; |
|
info->cea_rev = edid_ext[1]; |
info->color_formats |= DRM_COLOR_FORMAT_RGB444; |
if (edid->features & DRM_EDID_FEATURE_RGB_YCRCB444) |
info->color_formats |= DRM_COLOR_FORMAT_YCRCB444; |
if (edid->features & DRM_EDID_FEATURE_RGB_YCRCB422) |
info->color_formats |= DRM_COLOR_FORMAT_YCRCB422; |
} |
|
/** |
1559,6 → 2011,7 |
num_modes += add_standard_modes(connector, edid); |
num_modes += add_established_modes(connector, edid); |
num_modes += add_inferred_modes(connector, edid); |
num_modes += add_cea_modes(connector, edid); |
|
if (quirks & (EDID_QUIRK_PREFER_LARGE_60 | EDID_QUIRK_PREFER_LARGE_75)) |
edid_fixup_preferred(connector, quirks); |