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path: root/drivers/gpu/drm/drm_edid.c
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Diffstat (limited to 'drivers/gpu/drm/drm_edid.c')
-rw-r--r--drivers/gpu/drm/drm_edid.c222
1 files changed, 173 insertions, 49 deletions
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 5a18b0df8285..608bddfc7e35 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -81,7 +81,7 @@ struct detailed_mode_closure {
#define LEVEL_CVT 3
static struct edid_quirk {
- char *vendor;
+ char vendor[4];
int product_id;
u32 quirks;
} edid_quirk_list[] = {
@@ -149,13 +149,13 @@ EXPORT_SYMBOL(drm_edid_header_is_valid);
* Sanity check the EDID block (base or extension). Return 0 if the block
* doesn't check out, or 1 if it's valid.
*/
-bool drm_edid_block_valid(u8 *raw_edid)
+bool drm_edid_block_valid(u8 *raw_edid, int block)
{
int i;
u8 csum = 0;
struct edid *edid = (struct edid *)raw_edid;
- if (raw_edid[0] == 0x00) {
+ if (block == 0) {
int score = drm_edid_header_is_valid(raw_edid);
if (score == 8) ;
else if (score >= 6) {
@@ -219,7 +219,7 @@ bool drm_edid_is_valid(struct edid *edid)
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))
return false;
return true;
@@ -299,7 +299,7 @@ drm_do_get_edid(struct drm_connector *connector, struct i2c_adapter *adapter)
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))
break;
if (i == 0 && drm_edid_is_zero(block, EDID_LENGTH)) {
connector->null_edid_counter++;
@@ -324,7 +324,7 @@ drm_do_get_edid(struct drm_connector *connector, struct i2c_adapter *adapter)
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)) {
valid_extensions++;
break;
}
@@ -486,23 +486,47 @@ static void edid_fixup_preferred(struct drm_connector *connector,
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 mode;
+
+ return NULL;
}
EXPORT_SYMBOL(drm_mode_find_dmt);
@@ -731,10 +755,17 @@ drm_mode_std(struct drm_connector *connector, struct edid *edid,
}
/* 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;
@@ -748,6 +779,8 @@ drm_mode_std(struct drm_connector *connector, struct edid *edid,
* 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)) {
drm_mode_destroy(dev, mode);
mode = drm_gtf_mode_complex(dev, hsize, vsize,
@@ -909,15 +942,6 @@ static struct drm_display_mode *drm_mode_detailed(struct drm_device *dev,
}
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)
{
@@ -994,12 +1018,8 @@ mode_in_range(const struct drm_display_mode *mode, struct edid *edid,
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,
+drm_dmt_modes_for_range(struct drm_connector *connector, struct edid *edid,
struct detailed_timing *timing)
{
int i, modes = 0;
@@ -1019,17 +1039,110 @@ drm_gtf_modes_for_range(struct drm_connector *connector, struct edid *edid,
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)) {
+ 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)) {
+ 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 (data->type != EDID_DETAIL_MONITOR_RANGE)
+ return;
- if (gtf && data->type == EDID_DETAIL_MONITOR_RANGE)
+ 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
@@ -1062,8 +1175,8 @@ drm_est3_modes(struct drm_connector *connector, struct detailed_timing *timing)
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++;
@@ -1312,6 +1425,8 @@ add_detailed_modes(struct drm_connector *connector, struct edid *edid,
#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.
@@ -1666,13 +1781,29 @@ static void drm_add_display_info(struct edid *edid,
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;
@@ -1698,18 +1829,11 @@ static void drm_add_display_info(struct edid *edid,
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;
}
/**
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