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drm/dp: Factor out helper to distinguish between branch and sink devices

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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>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1477326811-30431-2-git-send-email-imre.deak@intel.com
This commit is contained in:
Imre Deak 2016-10-24 19:33:24 +03:00 committed by Daniel Vetter
parent 14544d0937
commit 714cf7ea50
2 changed files with 10 additions and 7 deletions
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11
drivers/gpu/drm/i915/intel_dp.c
View File

@ -1452,8 +1452,7 @@ static void intel_dp_print_hw_revision(struct intel_dp *intel_dp)
if ((drm_debug & DRM_UT_KMS) == 0)
return;
if (!(intel_dp->dpcd[DP_DOWNSTREAMPORT_PRESENT] &
DP_DWN_STRM_PORT_PRESENT))
if (!drm_dp_is_branch(intel_dp->dpcd))
return;
len = drm_dp_dpcd_read(&intel_dp->aux, DP_BRANCH_HW_REV, &rev, 1);
@ -1471,8 +1470,7 @@ static void intel_dp_print_sw_revision(struct intel_dp *intel_dp)
if ((drm_debug & DRM_UT_KMS) == 0)
return;
if (!(intel_dp->dpcd[DP_DOWNSTREAMPORT_PRESENT] &
DP_DWN_STRM_PORT_PRESENT))
if (!drm_dp_is_branch(intel_dp->dpcd))
return;
len = drm_dp_dpcd_read(&intel_dp->aux, DP_BRANCH_SW_REV, &rev, 2);
@ -3607,8 +3605,7 @@ intel_dp_get_dpcd(struct intel_dp *intel_dp)
if (!is_edp(intel_dp) && !intel_dp->sink_count)
return false;
if (!(intel_dp->dpcd[DP_DOWNSTREAMPORT_PRESENT] &
DP_DWN_STRM_PORT_PRESENT))
if (!drm_dp_is_branch(intel_dp->dpcd))
return true; /* native DP sink */
if (intel_dp->dpcd[DP_DPCD_REV] == 0x10)
@ -4096,7 +4093,7 @@ intel_dp_detect_dpcd(struct intel_dp *intel_dp)
return connector_status_connected;
/* if there's no downstream port, we're done */
if (!(dpcd[DP_DOWNSTREAMPORT_PRESENT] & DP_DWN_STRM_PORT_PRESENT))
if (!drm_dp_is_branch(dpcd))
return connector_status_connected;
/* If we're HPD-aware, SINK_COUNT changes dynamically */

6
include/drm/drm_dp_helper.h
View File

@ -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
*/