Commit 07faff36 authored by Chaitanya Kumar Borah's avatar Chaitanya Kumar Borah Committed by Suraj Kandpal
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drm/xe/display: read PCON capability only when present 



Avoid reading the PCON capabilities redundantly on non-branch devices.

v2:
 - Make commit description more accurate. (Imre)
 - Clear intel_dp->pcon_dsc_dpcd irrespective of presense of PCON. (Imre)

Signed-off-by: default avatarChaitanya Kumar Borah <chaitanya.kumar.borah@intel.com>
Reviewed-by: default avatarImre Deak <imre.deak@intel.com>
Signed-off-by: default avatarSuraj Kandpal <suraj.kandpal@intel.com>
Link: https://lore.kernel.org/r/20250619042629.3980244-1-chaitanya.kumar.borah@intel.com
parent 4f9c81d6

drivers/gpu/drm/i915/display/intel_dp.c

+3 −0
Original line number Diff line number Diff line
@@ -3726,6 +3726,9 @@ static void intel_dp_get_pcon_dsc_cap(struct intel_dp *intel_dp) 


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



	if (!drm_dp_is_branch(intel_dp->dpcd))

		return;



	if (drm_dp_dpcd_read(&intel_dp->aux, DP_PCON_DSC_ENCODER,

			     intel_dp->pcon_dsc_dpcd,

			     sizeof(intel_dp->pcon_dsc_dpcd)) < 0)