[PATCH 1/3] drm/dp: add helper for checking DP_ENHANCED_FRAME_CAP in DPCD

Signed-off-by: Jani Nikula jani.nikula@intel.com --- include/drm/drm_dp_helper.h | 7 +++++++ 1 file changed, 7 insertions(+)

diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h index ae8dbfb..fdf58fa 100644 --- a/include/drm/drm_dp_helper.h +++ b/include/drm/drm_dp_helper.h @@ -390,4 +390,11 @@ drm_dp_max_lane_count(u8 dpcd[DP_RECEIVER_CAP_SIZE]) return dpcd[DP_MAX_LANE_COUNT] & DP_MAX_LANE_COUNT_MASK; }

+static inline bool +drm_dp_enhanced_frame_cap(const u8 dpcd[DP_RECEIVER_CAP_SIZE]) +{ + return dpcd[DP_DPCD_REV] >= 0x11 && + (dpcd[DP_MAX_LANE_COUNT] & DP_ENHANCED_FRAME_CAP); +} + #endif /* _DRM_DP_HELPER_H_ */