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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.c215
1 files changed, 166 insertions, 49 deletions
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 6bb6337be920..4f751a9d71a3 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -82,6 +82,8 @@
#define EDID_QUIRK_FORCE_6BPC (1 << 10)
/* Force 10bpc */
#define EDID_QUIRK_FORCE_10BPC (1 << 11)
+/* Non desktop display (i.e. HMD) */
+#define EDID_QUIRK_NON_DESKTOP (1 << 12)
struct detailed_mode_closure {
struct drm_connector *connector;
@@ -111,6 +113,9 @@ static const struct edid_quirk {
/* AEO model 0 reports 8 bpc, but is a 6 bpc panel */
{ "AEO", 0, EDID_QUIRK_FORCE_6BPC },
+ /* CPT panel of Asus UX303LA reports 8 bpc, but is a 6 bpc panel */
+ { "CPT", 0x17df, EDID_QUIRK_FORCE_6BPC },
+
/* Belinea 10 15 55 */
{ "MAX", 1516, EDID_QUIRK_PREFER_LARGE_60 },
{ "MAX", 0x77e, EDID_QUIRK_PREFER_LARGE_60 },
@@ -157,6 +162,27 @@ static const struct edid_quirk {
/* Rotel RSX-1058 forwards sink's EDID but only does HDMI 1.1*/
{ "ETR", 13896, EDID_QUIRK_FORCE_8BPC },
+
+ /* HTC Vive VR Headset */
+ { "HVR", 0xaa01, EDID_QUIRK_NON_DESKTOP },
+
+ /* Oculus Rift DK1, DK2, and CV1 VR Headsets */
+ { "OVR", 0x0001, EDID_QUIRK_NON_DESKTOP },
+ { "OVR", 0x0003, EDID_QUIRK_NON_DESKTOP },
+ { "OVR", 0x0004, EDID_QUIRK_NON_DESKTOP },
+
+ /* Windows Mixed Reality Headsets */
+ { "ACR", 0x7fce, EDID_QUIRK_NON_DESKTOP },
+ { "HPN", 0x3515, EDID_QUIRK_NON_DESKTOP },
+ { "LEN", 0x0408, EDID_QUIRK_NON_DESKTOP },
+ { "LEN", 0xb800, EDID_QUIRK_NON_DESKTOP },
+ { "FUJ", 0x1970, EDID_QUIRK_NON_DESKTOP },
+ { "DEL", 0x7fce, EDID_QUIRK_NON_DESKTOP },
+ { "SEC", 0x144a, EDID_QUIRK_NON_DESKTOP },
+ { "AUS", 0xc102, EDID_QUIRK_NON_DESKTOP },
+
+ /* Sony PlayStation VR Headset */
+ { "SNY", 0x0704, EDID_QUIRK_NON_DESKTOP },
};
/*
@@ -1533,6 +1559,10 @@ static void connector_bad_edid(struct drm_connector *connector,
* level, drivers must make all reasonable efforts to expose it as an I2C
* adapter and use drm_get_edid() instead of abusing this function.
*
+ * The EDID may be overridden using debugfs override_edid or firmare EDID
+ * (drm_load_edid_firmware() and drm.edid_firmware parameter), in this priority
+ * order. Having either of them bypasses actual EDID reads.
+ *
* Return: Pointer to valid EDID or NULL if we couldn't find any.
*/
struct edid *drm_do_get_edid(struct drm_connector *connector,
@@ -1542,6 +1572,17 @@ struct edid *drm_do_get_edid(struct drm_connector *connector,
{
int i, j = 0, valid_extensions = 0;
u8 *edid, *new;
+ struct edid *override = NULL;
+
+ if (connector->override_edid)
+ override = drm_edid_duplicate((const struct edid *)
+ connector->edid_blob_ptr->data);
+
+ if (!override)
+ override = drm_load_edid_firmware(connector);
+
+ if (!IS_ERR_OR_NULL(override))
+ return override;
if ((edid = kmalloc(EDID_LENGTH, GFP_KERNEL)) == NULL)
return NULL;
@@ -1711,7 +1752,7 @@ EXPORT_SYMBOL(drm_edid_duplicate);
*
* Returns true if @vendor is in @edid, false otherwise
*/
-static bool edid_vendor(struct edid *edid, const char *vendor)
+static bool edid_vendor(const struct edid *edid, const char *vendor)
{
char edid_vendor[3];
@@ -1729,7 +1770,7 @@ static bool edid_vendor(struct edid *edid, const char *vendor)
*
* This tells subsequent routines what fixes they need to apply.
*/
-static u32 edid_get_quirks(struct edid *edid)
+static u32 edid_get_quirks(const struct edid *edid)
{
const struct edid_quirk *quirk;
int i;
@@ -2793,7 +2834,7 @@ add_detailed_modes(struct drm_connector *connector, struct edid *edid,
/*
* Search EDID for CEA extension block.
*/
-static u8 *drm_find_edid_extension(struct edid *edid, int ext_id)
+static u8 *drm_find_edid_extension(const struct edid *edid, int ext_id)
{
u8 *edid_ext = NULL;
int i;
@@ -2815,12 +2856,12 @@ static u8 *drm_find_edid_extension(struct edid *edid, int ext_id)
return edid_ext;
}
-static u8 *drm_find_cea_extension(struct edid *edid)
+static u8 *drm_find_cea_extension(const struct edid *edid)
{
return drm_find_edid_extension(edid, CEA_EXT);
}
-static u8 *drm_find_displayid_extension(struct edid *edid)
+static u8 *drm_find_displayid_extension(const struct edid *edid)
{
return drm_find_edid_extension(edid, DISPLAYID_EXT);
}
@@ -3378,6 +3419,7 @@ static int
do_hdmi_vsdb_modes(struct drm_connector *connector, const u8 *db, u8 len,
const u8 *video_db, u8 video_len)
{
+ struct drm_display_info *info = &connector->display_info;
int modes = 0, offset = 0, i, multi_present = 0, multi_len;
u8 vic_len, hdmi_3d_len = 0;
u16 mask;
@@ -3505,6 +3547,8 @@ do_hdmi_vsdb_modes(struct drm_connector *connector, const u8 *db, u8 len,
}
out:
+ if (modes > 0)
+ info->has_hdmi_infoframe = true;
return modes;
}
@@ -3741,8 +3785,8 @@ drm_parse_hdmi_vsdb_audio(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 */
+ if (len >= 6 && (db[6] & (1 << 7)))
+ connector->eld[DRM_ELD_SAD_COUNT_CONN_TYPE] |= DRM_ELD_SUPPORTS_AI;
if (len >= 8) {
connector->latency_present[0] = db[8] >> 7;
connector->latency_present[1] = (db[8] >> 6) & 1;
@@ -3814,16 +3858,27 @@ void drm_edid_get_monitor_name(struct edid *edid, char *name, int bufsize)
}
EXPORT_SYMBOL(drm_edid_get_monitor_name);
-/**
+static void clear_eld(struct drm_connector *connector)
+{
+ memset(connector->eld, 0, sizeof(connector->eld));
+
+ connector->latency_present[0] = false;
+ connector->latency_present[1] = false;
+ connector->video_latency[0] = 0;
+ connector->audio_latency[0] = 0;
+ connector->video_latency[1] = 0;
+ connector->audio_latency[1] = 0;
+}
+
+/*
* 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. The
- * Conn_Type, HDCP and Port_ID ELD fields are left for the graphics driver to
- * fill in.
+ * HDCP and Port_ID ELD fields are left for the graphics driver to fill in.
*/
-void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid)
+static void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid)
{
uint8_t *eld = connector->eld;
u8 *cea;
@@ -3832,14 +3887,7 @@ void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid)
int mnl;
int dbl;
- memset(eld, 0, sizeof(connector->eld));
-
- connector->latency_present[0] = false;
- connector->latency_present[1] = false;
- connector->video_latency[0] = 0;
- connector->audio_latency[0] = 0;
- connector->video_latency[1] = 0;
- connector->audio_latency[1] = 0;
+ clear_eld(connector);
if (!edid)
return;
@@ -3850,17 +3898,18 @@ void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid)
return;
}
- mnl = get_monitor_name(edid, eld + 20);
+ mnl = get_monitor_name(edid, &eld[DRM_ELD_MONITOR_NAME_STRING]);
+ DRM_DEBUG_KMS("ELD monitor %s\n", &eld[DRM_ELD_MONITOR_NAME_STRING]);
- eld[4] = (cea[1] << 5) | mnl;
- DRM_DEBUG_KMS("ELD monitor %s\n", eld + 20);
+ eld[DRM_ELD_CEA_EDID_VER_MNL] = cea[1] << DRM_ELD_CEA_EDID_VER_SHIFT;
+ eld[DRM_ELD_CEA_EDID_VER_MNL] |= mnl;
- eld[0] = 2 << 3; /* ELD version: 2 */
+ eld[DRM_ELD_VER] = DRM_ELD_VER_CEA861D;
- eld[16] = edid->mfg_id[0];
- eld[17] = edid->mfg_id[1];
- eld[18] = edid->prod_code[0];
- eld[19] = edid->prod_code[1];
+ eld[DRM_ELD_MANUFACTURER_NAME0] = edid->mfg_id[0];
+ eld[DRM_ELD_MANUFACTURER_NAME1] = edid->mfg_id[1];
+ eld[DRM_ELD_PRODUCT_CODE0] = edid->prod_code[0];
+ eld[DRM_ELD_PRODUCT_CODE1] = edid->prod_code[1];
if (cea_revision(cea) >= 3) {
int i, start, end;
@@ -3881,14 +3930,14 @@ void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid)
/* Audio Data Block, contains SADs */
sad_count = min(dbl / 3, 15 - total_sad_count);
if (sad_count >= 1)
- memcpy(eld + 20 + mnl + total_sad_count * 3,
+ memcpy(&eld[DRM_ELD_CEA_SAD(mnl, total_sad_count)],
&db[1], sad_count * 3);
total_sad_count += sad_count;
break;
case SPEAKER_BLOCK:
/* Speaker Allocation Data Block */
if (dbl >= 1)
- eld[7] = db[1];
+ eld[DRM_ELD_SPEAKER] = db[1];
break;
case VENDOR_BLOCK:
/* HDMI Vendor-Specific Data Block */
@@ -3900,7 +3949,13 @@ void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid)
}
}
}
- eld[5] |= total_sad_count << 4;
+ eld[DRM_ELD_SAD_COUNT_CONN_TYPE] |= total_sad_count << DRM_ELD_SAD_COUNT_SHIFT;
+
+ if (connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort ||
+ connector->connector_type == DRM_MODE_CONNECTOR_eDP)
+ eld[DRM_ELD_SAD_COUNT_CONN_TYPE] |= DRM_ELD_CONN_TYPE_DP;
+ else
+ eld[DRM_ELD_SAD_COUNT_CONN_TYPE] |= DRM_ELD_CONN_TYPE_HDMI;
eld[DRM_ELD_BASELINE_ELD_LEN] =
DIV_ROUND_UP(drm_eld_calc_baseline_block_size(eld), 4);
@@ -3908,7 +3963,6 @@ void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid)
DRM_DEBUG_KMS("ELD size %d, SAD count %d\n",
drm_eld_size(eld), total_sad_count);
}
-EXPORT_SYMBOL(drm_edid_to_eld);
/**
* drm_edid_to_sad - extracts SADs from EDID
@@ -4218,6 +4272,8 @@ static void drm_parse_hdmi_forum_vsdb(struct drm_connector *connector,
struct drm_display_info *display = &connector->display_info;
struct drm_hdmi_info *hdmi = &display->hdmi;
+ display->has_hdmi_infoframe = true;
+
if (hf_vsdb[6] & 0x80) {
hdmi->scdc.supported = true;
if (hf_vsdb[6] & 0x40)
@@ -4343,7 +4399,7 @@ drm_parse_hdmi_vsdb_video(struct drm_connector *connector, const u8 *db)
}
static void drm_parse_cea_ext(struct drm_connector *connector,
- struct edid *edid)
+ const struct edid *edid)
{
struct drm_display_info *info = &connector->display_info;
const u8 *edid_ext;
@@ -4377,11 +4433,34 @@ static void drm_parse_cea_ext(struct drm_connector *connector,
}
}
-static void drm_add_display_info(struct drm_connector *connector,
- struct edid *edid)
+/* A connector has no EDID information, so we've got no EDID to compute quirks from. Reset
+ * all of the values which would have been set from EDID
+ */
+void
+drm_reset_display_info(struct drm_connector *connector)
+{
+ struct drm_display_info *info = &connector->display_info;
+
+ info->width_mm = 0;
+ info->height_mm = 0;
+
+ info->bpc = 0;
+ info->color_formats = 0;
+ info->cea_rev = 0;
+ info->max_tmds_clock = 0;
+ info->dvi_dual = false;
+ info->has_hdmi_infoframe = false;
+
+ info->non_desktop = 0;
+}
+EXPORT_SYMBOL_GPL(drm_reset_display_info);
+
+u32 drm_add_display_info(struct drm_connector *connector, const struct edid *edid)
{
struct drm_display_info *info = &connector->display_info;
+ u32 quirks = edid_get_quirks(edid);
+
info->width_mm = edid->width_cm * 10;
info->height_mm = edid->height_cm * 10;
@@ -4391,12 +4470,17 @@ static void drm_add_display_info(struct drm_connector *connector,
info->cea_rev = 0;
info->max_tmds_clock = 0;
info->dvi_dual = false;
+ info->has_hdmi_infoframe = false;
+
+ info->non_desktop = !!(quirks & EDID_QUIRK_NON_DESKTOP);
+
+ DRM_DEBUG_KMS("non_desktop set to %d\n", info->non_desktop);
if (edid->revision < 3)
- return;
+ return quirks;
if (!(edid->input & DRM_EDID_INPUT_DIGITAL))
- return;
+ return quirks;
drm_parse_cea_ext(connector, edid);
@@ -4416,7 +4500,7 @@ static void drm_add_display_info(struct drm_connector *connector,
/* Only defined for 1.4 with digital displays */
if (edid->revision < 4)
- return;
+ return quirks;
switch (edid->input & DRM_EDID_DIGITAL_DEPTH_MASK) {
case DRM_EDID_DIGITAL_DEPTH_6:
@@ -4451,7 +4535,9 @@ static void drm_add_display_info(struct drm_connector *connector,
info->color_formats |= DRM_COLOR_FORMAT_YCRCB444;
if (edid->features & DRM_EDID_FEATURE_RGB_YCRCB422)
info->color_formats |= DRM_COLOR_FORMAT_YCRCB422;
+ return quirks;
}
+EXPORT_SYMBOL_GPL(drm_add_display_info);
static int validate_displayid(u8 *displayid, int length, int idx)
{
@@ -4586,8 +4672,8 @@ static int add_displayid_detailed_modes(struct drm_connector *connector,
* @edid: EDID data
*
* Add the specified modes to the connector's mode list. Also fills out the
- * &drm_display_info structure in @connector with any information which can be
- * derived from the edid.
+ * &drm_display_info structure and ELD in @connector with any information which
+ * can be derived from the edid.
*
* Return: The number of modes added or 0 if we couldn't find any.
*/
@@ -4597,22 +4683,24 @@ int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid)
u32 quirks;
if (edid == NULL) {
+ clear_eld(connector);
return 0;
}
if (!drm_edid_is_valid(edid)) {
+ clear_eld(connector);
dev_warn(connector->dev->dev, "%s: EDID invalid.\n",
connector->name);
return 0;
}
- quirks = edid_get_quirks(edid);
+ drm_edid_to_eld(connector, edid);
/*
* CEA-861-F adds ycbcr capability map block, for HDMI 2.0 sinks.
* To avoid multiple parsing of same block, lets parse that map
* from sink info, before parsing CEA modes.
*/
- drm_add_display_info(connector, edid);
+ quirks = drm_add_display_info(connector, edid);
/*
* EDID spec says modes should be preferred in this order:
@@ -4804,12 +4892,18 @@ EXPORT_SYMBOL(drm_hdmi_avi_infoframe_from_display_mode);
* @mode: DRM display mode
* @rgb_quant_range: RGB quantization range (Q)
* @rgb_quant_range_selectable: Sink support selectable RGB quantization range (QS)
+ * @is_hdmi2_sink: HDMI 2.0 sink, which has different default recommendations
+ *
+ * Note that @is_hdmi2_sink can be derived by looking at the
+ * &drm_scdc.supported flag stored in &drm_hdmi_info.scdc,
+ * &drm_display_info.hdmi, which can be found in &drm_connector.display_info.
*/
void
drm_hdmi_avi_infoframe_quant_range(struct hdmi_avi_infoframe *frame,
const struct drm_display_mode *mode,
enum hdmi_quantization_range rgb_quant_range,
- bool rgb_quant_range_selectable)
+ bool rgb_quant_range_selectable,
+ bool is_hdmi2_sink)
{
/*
* CEA-861:
@@ -4833,8 +4927,15 @@ drm_hdmi_avi_infoframe_quant_range(struct hdmi_avi_infoframe *frame,
* YQ-field to match the RGB Quantization Range being transmitted
* (e.g., when Limited Range RGB, set YQ=0 or when Full Range RGB,
* set YQ=1) and the Sink shall ignore the YQ-field."
+ *
+ * Unfortunate certain sinks (eg. VIZ Model 67/E261VA) get confused
+ * by non-zero YQ when receiving RGB. There doesn't seem to be any
+ * good way to tell which version of CEA-861 the sink supports, so
+ * we limit non-zero YQ to HDMI 2.0 sinks only as HDMI 2.0 is based
+ * on on CEA-861-F.
*/
- if (rgb_quant_range == HDMI_QUANTIZATION_RANGE_LIMITED)
+ if (!is_hdmi2_sink ||
+ rgb_quant_range == HDMI_QUANTIZATION_RANGE_LIMITED)
frame->ycc_quantization_range =
HDMI_YCC_QUANTIZATION_RANGE_LIMITED;
else
@@ -4874,6 +4975,7 @@ s3d_structure_from_display_mode(const struct drm_display_mode *mode)
* drm_hdmi_vendor_infoframe_from_display_mode() - fill an HDMI infoframe with
* data from a DRM display mode
* @frame: HDMI vendor infoframe
+ * @connector: the connector
* @mode: DRM display mode
*
* Note that there's is a need to send HDMI vendor infoframes only when using a
@@ -4884,8 +4986,15 @@ s3d_structure_from_display_mode(const struct drm_display_mode *mode)
*/
int
drm_hdmi_vendor_infoframe_from_display_mode(struct hdmi_vendor_infoframe *frame,
+ struct drm_connector *connector,
const struct drm_display_mode *mode)
{
+ /*
+ * FIXME: sil-sii8620 doesn't have a connector around when
+ * we need one, so we have to be prepared for a NULL connector.
+ */
+ bool has_hdmi_infoframe = connector ?
+ connector->display_info.has_hdmi_infoframe : false;
int err;
u32 s3d_flags;
u8 vic;
@@ -4893,11 +5002,21 @@ drm_hdmi_vendor_infoframe_from_display_mode(struct hdmi_vendor_infoframe *frame,
if (!frame || !mode)
return -EINVAL;
+ if (!has_hdmi_infoframe)
+ return -EINVAL;
+
vic = drm_match_hdmi_mode(mode);
s3d_flags = mode->flags & DRM_MODE_FLAG_3D_MASK;
- if (!vic && !s3d_flags)
- return -EINVAL;
+ /*
+ * Even if it's not absolutely necessary to send the infoframe
+ * (ie.vic==0 and s3d_struct==0) we will still send it if we
+ * know that the sink can handle it. This is based on a
+ * suggestion in HDMI 2.0 Appendix F. Apparently some sinks
+ * have trouble realizing that they shuld switch from 3D to 2D
+ * mode if the source simply stops sending the infoframe when
+ * it wants to switch from 3D to 2D.
+ */
if (vic && s3d_flags)
return -EINVAL;
@@ -4906,10 +5025,8 @@ drm_hdmi_vendor_infoframe_from_display_mode(struct hdmi_vendor_infoframe *frame,
if (err < 0)
return err;
- if (vic)
- frame->vic = vic;
- else
- frame->s3d_struct = s3d_structure_from_display_mode(mode);
+ frame->vic = vic;
+ frame->s3d_struct = s3d_structure_from_display_mode(mode);
return 0;
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.