From: Jani Nikula <jani.nikula@intel.com>
Date: Fri, 4 Oct 2013 12:08:08 +0000 (+0300)
Subject: drm/dp: add helper for checking DP_ENHANCED_FRAME_CAP in DPCD
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=58704e6a5478a96ca0e549ce6605332aab815eea;p=linux-beck.git

drm/dp: add helper for checking DP_ENHANCED_FRAME_CAP in DPCD

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
---

diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h
index 110f4f1f51d7..a92c3754e3bb 100644
--- a/include/drm/drm_dp_helper.h
+++ b/include/drm/drm_dp_helper.h
@@ -390,4 +390,11 @@ drm_dp_max_lane_count(const 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_ */