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authorImre Deak <imre.deak@intel.com>2016-10-24 19:33:24 +0300
committerImre Deak <imre.deak@intel.com>2016-10-26 12:40:59 +0300
commitc726ad01d2e3e27400421de85800d954df55aeea (patch)
treec2a1868e0de4c80fedca081cc14ed7d3b50455fd /include/drm/drm_dp_helper.h
parent6014ac122ed081feca99217bc57b2e15c7fc1a51 (diff)
downloadop-kernel-dev-c726ad01d2e3e27400421de85800d954df55aeea.zip
op-kernel-dev-c726ad01d2e3e27400421de85800d954df55aeea.tar.gz
drm/dp: Factor out helper to distinguish between branch and sink devices
This check is open-coded in a few places, so it makes sense to simplify things by having a helper for it similar to the rest of DPCD feature helpers. v2: (Jani) - Move the helper to drm_dp_helper.h. - Split out this change to a separate patch. Cc: Jani Nikula <jani.nikula@intel.com> Cc: dri-devel@lists.freedesktop.org Signed-off-by: Imre Deak <imre.deak@intel.com> Reviewed-by: Jani Nikula <jani.nikula@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1477326811-30431-2-git-send-email-imre.deak@intel.com
Diffstat (limited to 'include/drm/drm_dp_helper.h')
-rw-r--r--include/drm/drm_dp_helper.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h
index 2a79882..55bbeb0 100644
--- a/include/drm/drm_dp_helper.h
+++ b/include/drm/drm_dp_helper.h
@@ -690,6 +690,12 @@ drm_dp_tps3_supported(const u8 dpcd[DP_RECEIVER_CAP_SIZE])
dpcd[DP_MAX_LANE_COUNT] & DP_TPS3_SUPPORTED;
}
+static inline bool
+drm_dp_is_branch(const u8 dpcd[DP_RECEIVER_CAP_SIZE])
+{
+ return dpcd[DP_DOWNSTREAMPORT_PRESENT] & DP_DWN_STRM_PORT_PRESENT;
+}
+
/*
* DisplayPort AUX channel
*/
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