diff options
| -rw-r--r-- | drivers/gpu/drm/display/drm_dp_helper.c | 23 | ||||
| -rw-r--r-- | include/drm/display/drm_dp_helper.h | 2 |
2 files changed, 25 insertions, 0 deletions
diff --git a/drivers/gpu/drm/display/drm_dp_helper.c b/drivers/gpu/drm/display/drm_dp_helper.c index 10ee82e34de7..9ac52cf5d4d8 100644 --- a/drivers/gpu/drm/display/drm_dp_helper.c +++ b/drivers/gpu/drm/display/drm_dp_helper.c @@ -2914,6 +2914,29 @@ void drm_dp_vsc_sdp_log(struct drm_printer *p, const struct drm_dp_vsc_sdp *vsc) 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 (dpcd[DP_DPCD_REV] < DP_DPCD_REV_13) + return false; + + 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 (rx_feature & DP_VSC_SDP_EXT_FOR_COLORIMETRY_SUPPORTED); +} +EXPORT_SYMBOL(drm_dp_vsc_sdp_supported); + +/** * drm_dp_vsc_sdp_pack() - pack a given vsc sdp into generic dp_sdp * @vsc: vsc sdp initialized according to its purpose as defined in * table 2-118 - table 2-120 in DP 1.4a specification diff --git a/include/drm/display/drm_dp_helper.h b/include/drm/display/drm_dp_helper.h index 1f41994796d3..0c1a4021e098 100644 --- a/include/drm/display/drm_dp_helper.h +++ b/include/drm/display/drm_dp_helper.h @@ -100,6 +100,8 @@ struct drm_dp_vsc_sdp { void drm_dp_vsc_sdp_log(struct drm_printer *p, 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]); static inline int |