@@ -2917,6 +2917,27 @@ void drm_dp_vsc_sdp_log(const char *level, struct device *dev,
}
EXPORT_SYMBOL(drm_dp_vsc_sdp_log);
+/**
+ * drm_dp_vsc_sdp_supported() - check if vsc sdp is supported
+ * @aux: DisplayPort AUX channel
+ * @dpcd: DisplayPort configuration data
+ *
+ * Returns true if vsc sdp is supported, else returns false
+ */
+bool drm_dp_vsc_sdp_supported(struct drm_dp_aux *aux, const u8 dpcd[DP_RECEIVER_CAP_SIZE])
+{
+ u8 rx_feature;
+
+ if (drm_dp_dpcd_readb(aux, DP_DPRX_FEATURE_ENUMERATION_LIST, &rx_feature) != 1) {
+ drm_dbg_dp(aux->drm_dev, "failed to read DP_DPRX_FEATURE_ENUMERATION_LIST\n");
+ return false;
+ }
+
+ return (dpcd[DP_DPCD_REV] >= DP_DPCD_REV_13) &&
+ !!(rx_feature & DP_VSC_SDP_EXT_FOR_COLORIMETRY_SUPPORTED);
+}
+EXPORT_SYMBOL(drm_dp_vsc_sdp_supported);
+
/**
* drm_dp_get_pcon_max_frl_bw() - maximum frl supported by PCON
* @dpcd: DisplayPort configuration data
@@ -100,6 +100,7 @@ struct drm_dp_vsc_sdp {
void drm_dp_vsc_sdp_log(const char *level, struct device *dev,
const struct drm_dp_vsc_sdp *vsc);
+bool drm_dp_vsc_sdp_supported(struct drm_dp_aux *aux, const u8 dpcd[DP_RECEIVER_CAP_SIZE]);
int drm_dp_psr_setup_time(const u8 psr_cap[EDP_PSR_RECEIVER_CAP_SIZE]);
YUV420 format is supported only in the VSC SDP packet and not through MSA. Hence add an API which indicates the sink support which can be used by the rest of the DP programming. Changes in v2: - Move VSC SDP support check API from dp_panel.c to drm_dp_helper.c Signed-off-by: Paloma Arellano <quic_parellan@quicinc.com> --- drivers/gpu/drm/display/drm_dp_helper.c | 21 +++++++++++++++++++++ include/drm/display/drm_dp_helper.h | 1 + 2 files changed, 22 insertions(+)