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Commit 50003939 authored by Jani Nikula's avatar Jani Nikula Committed by Daniel Vetter
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drm/i915/dp: read DPCD PSR capability only on eDP 



Reduce AUX transactions for non-eDP.

Signed-off-by: default avatarJani Nikula <jani.nikula@intel.com>
Reviewed-by: default avatarTodd Previte <tprevite@gmail.com>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent 2b996677

drivers/gpu/drm/i915/intel_dp.c

+8 −5
Original line number Diff line number Diff line
@@ -2686,11 +2686,14 @@ intel_dp_get_dpcd(struct intel_dp *intel_dp) 


	/* Check if the panel supports PSR */

	memset(intel_dp->psr_dpcd, 0, sizeof(intel_dp->psr_dpcd));

	if (is_edp(intel_dp)) {

		intel_dp_aux_native_read_retry(intel_dp, DP_PSR_SUPPORT,

					       intel_dp->psr_dpcd,

					       sizeof(intel_dp->psr_dpcd));

		if (is_edp_psr(intel_dp))

			DRM_DEBUG_KMS("Detected EDP PSR Panel.\n");

	}



	if (!(intel_dp->dpcd[DP_DOWNSTREAMPORT_PRESENT] &

	      DP_DWN_STRM_PORT_PRESENT))

		return true; /* native DP sink */