CEA-861-F spec adds ycbcr420 deep color support information
in hf-vsdb block. This patch extends the existing hf-vsdb parsing
function by adding parsing of ycbcr420 deep color support from the
EDID and adding it into display information stored.
V2: Rebase
V3: Rebase
V4: Moved definition of y420_dc_modes into this patch, where its used
(Ville)
V5: Optimize function, if(conditions) not reqd (Ville)
Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Cc: Jose Abreu <joabreu@xxxxxxxxxxxx>
Signed-off-by: Shashank Sharma <shashank.sharma@xxxxxxxxx>
---
drivers/gpu/drm/drm_edid.c | 12 ++++++++++++
include/drm/drm_connector.h | 3 +++
include/drm/drm_edid.h | 8 ++++++++
3 files changed, 23 insertions(+)
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 44be128..944a28f 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -4199,6 +4199,16 @@ drm_default_rgb_quant_range(const struct drm_display_mode *mode)
}
EXPORT_SYMBOL(drm_default_rgb_quant_range);
+static void drm_parse_ycbcr420_deep_color_info(struct drm_connector *connector,
+ const u8 *db)
+{
+ u8 dc_mask;
+ struct drm_hdmi_info *hdmi = &connector->display_info.hdmi;
+
+ dc_mask = db[7] & DRM_EDID_YCBCR420_DC_MASK;
+ hdmi->y420_dc_modes |= dc_mask;
+}
+
static void drm_parse_hdmi_forum_vsdb(struct drm_connector *connector,
const u8 *hf_vsdb)
{
@@ -4239,6 +4249,8 @@ static void drm_parse_hdmi_forum_vsdb(struct drm_connector *connector,
scdc->scrambling.low_rates = true;
}
}
+
+ drm_parse_ycbcr420_deep_color_info(connector, hf_vsdb);
}
static void drm_parse_hdmi_deep_color_info(struct drm_connector *connector,
diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
index 225e092..4bc0882 100644
--- a/include/drm/drm_connector.h
+++ b/include/drm/drm_connector.h
@@ -154,6 +154,9 @@ struct drm_hdmi_info {
/** @y420_cmdb_map: bitmap of SVD index, to extraxt vcb modes */
u64 y420_cmdb_map;
+
+ /** @y420_dc_modes: bitmap of deep color support index */
+ u8 y420_dc_modes;
};
/**
diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h
index b55b2a7..aa58146 100644
--- a/include/drm/drm_edid.h
+++ b/include/drm/drm_edid.h
@@ -213,6 +213,14 @@ struct detailed_timing {
#define DRM_EDID_HDMI_DC_30 (1 << 4)
#define DRM_EDID_HDMI_DC_Y444 (1 << 3)
+/* YCBCR 420 deep color modes */
+#define DRM_EDID_YCBCR420_DC_48 (1 << 6)
+#define DRM_EDID_YCBCR420_DC_36 (1 << 5)
+#define DRM_EDID_YCBCR420_DC_30 (1 << 4)
+#define DRM_EDID_YCBCR420_DC_MASK (DRM_EDID_YCBCR420_DC_48 | \
+ DRM_EDID_YCBCR420_DC_36 | \
+ DRM_EDID_YCBCR420_DC_30)
+
/* ELD Header Block */
#define DRM_ELD_HEADER_BLOCK_SIZE 4
--
2.7.4
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