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

Jani Nikula
2013-10-04T12:08:08Z

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_ */
--
1.7.9.5