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| author | Imre Deak | 2016-10-24 18:33:24 +0200 |
|---|---|---|
| committer | Imre Deak | 2016-10-26 11:40:59 +0200 |
| commit | c726ad01d2e3e27400421de85800d954df55aeea (patch) | |
| tree | c2a1868e0de4c80fedca081cc14ed7d3b50455fd /include/drm/drm_dp_helper.h | |
| parent | drm/i915/audio: set proper N/M in modeset (diff) | |
| download | kernel-qcow2-linux-c726ad01d2e3e27400421de85800d954df55aeea.tar.gz kernel-qcow2-linux-c726ad01d2e3e27400421de85800d954df55aeea.tar.xz kernel-qcow2-linux-c726ad01d2e3e27400421de85800d954df55aeea.zip | |
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.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h index 2a79882cb68e..55bbeb0ff594 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 */ |