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FROMLIST: drm: Parse HDR metadata info from EDID

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HDR metadata block is introduced in CEA-861.3 spec.
Parsing the same to get the panel's HDR metadata.

Change-Id: I4cede936aa4d0ff844fa8abf24cb76211c785d53
Signed-off-by: Uma Shankar <uma.shankar@intel.com>
Signed-off-by: Zheng Yang <zhengyang@rock-chips.com>
(am from https://patchwork.kernel.org/patch/9756421/)
This commit is contained in:
Uma Shankar
2017-05-31 15:40:51 +05:30
committed by Tao Huang
parent c51c06e952
commit eabf439fe6
1 changed files with 57 additions and 0 deletions
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57
drivers/gpu/drm/drm_edid.c
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@@ -3676,6 +3676,17 @@ static bool cea_db_is_hdmi_colorimetry_data_block(const u8 *db)
return true;
}
static bool cea_db_is_hdmi_hdr_metadata_block(const u8 *db)
{
if (cea_db_tag(db) != DATA_BLOCK_EXTENDED_TAG)
return false;
if (db[1] != HDR_STATIC_METADATA_BLOCK)
return false;
return true;
}
static void
drm_parse_colorimetry_data_block(struct drm_connector *connector, const u8 *db)
{
@@ -3686,6 +3697,50 @@ drm_parse_colorimetry_data_block(struct drm_connector *connector, const u8 *db)
info->colorimetry = db[2];
}
static uint16_t eotf_supported(const u8 *edid_ext)
{
uint16_t val = 0;
if (edid_ext[2] & TRADITIONAL_GAMMA_SDR)
val |= TRADITIONAL_GAMMA_SDR;
if (edid_ext[2] & TRADITIONAL_GAMMA_HDR)
val |= TRADITIONAL_GAMMA_HDR;
if (edid_ext[2] & SMPTE_ST2084)
val |= SMPTE_ST2084;
return val;
}
static uint16_t hdr_metadata_type(const u8 *edid_ext)
{
uint16_t val = 0;
if (edid_ext[3] & STATIC_METADATA_TYPE1)
val |= STATIC_METADATA_TYPE1;
return val;
}
static void
drm_parse_hdr_metadata_block(struct drm_connector *connector, const u8 *db)
{
uint16_t len;
len = cea_db_payload_len(db);
connector->hdr_panel_metadata->eotf = eotf_supported(db);
connector->hdr_panel_metadata->type = hdr_metadata_type(db);
if (len == 6) {
connector->hdr_panel_metadata->max_cll = db[4];
connector->hdr_panel_metadata->max_fall = db[5];
connector->hdr_panel_metadata->min_cll = db[6];
} else if (len == 5) {
connector->hdr_panel_metadata->max_cll = db[4];
connector->hdr_panel_metadata->max_fall = db[5];
} else if (len == 4)
connector->hdr_panel_metadata->max_cll = db[4];
}
static void
drm_parse_hdmi_vsdb_audio(struct drm_connector *connector, const u8 *db)
{
@@ -4290,6 +4345,8 @@ static void drm_parse_cea_ext(struct drm_connector *connector,
drm_parse_y420cmdb_bitmap(connector, db);
if (cea_db_is_hdmi_colorimetry_data_block(db))
drm_parse_colorimetry_data_block(connector, db);
if (cea_db_is_hdmi_hdr_metadata_block(db))
drm_parse_hdr_metadata_block(connector, db);
}
}