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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>
This commit is contained in:
Jani Nikula 2013-10-04 15:08:08 +03:00 committed by Dave Airlie
parent 0111be4218
commit 58704e6a54
1 changed files with 7 additions and 0 deletions
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7
include/drm/drm_dp_helper.h
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@ -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_ */