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Commit 2293bb5c authored by Shobhit Kumar's avatar Shobhit Kumar Committed by Daniel Vetter
Browse files

drm/i915: Read the EDP DPCD and PSR Capability 



v2: reuse of just created is_edp_psr and put it at right place.
v3: move is_edp_psr above intel_edp_disable
v4: remove parentheses. Noticed by Paulo.

Reviewed-by: default avatarPaulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: default avatarJani Nikula <jani.nikula@intel.com>
Signed-off-by: default avatarShobhit Kumar <shobhit.kumar@intel.com>
Signed-off-by: default avatarRodrigo Vivi <rodrigo.vivi@gmail.com>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent 52604b1f

drivers/gpu/drm/i915/intel_dp.c

+13 −0
Original line number Diff line number Diff line
@@ -1364,6 +1364,12 @@ static void intel_dp_get_config(struct intel_encoder *encoder, 
	}

}



static bool is_edp_psr(struct intel_dp *intel_dp)

{

	return is_edp(intel_dp) &&

		intel_dp->psr_dpcd[0] & DP_PSR_IS_SUPPORTED;

}



static void intel_disable_dp(struct intel_encoder *encoder)

{

	struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
@@ -2277,6 +2283,13 @@ intel_dp_get_dpcd(struct intel_dp *intel_dp) 
	if (intel_dp->dpcd[DP_DPCD_REV] == 0)

		return false; /* DPCD not present */



	/* Check if the panel supports PSR */

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

	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 */

drivers/gpu/drm/i915/intel_drv.h

+1 −0
Original line number Diff line number Diff line
@@ -487,6 +487,7 @@ struct intel_dp { 
	uint8_t link_bw;

	uint8_t lane_count;

	uint8_t dpcd[DP_RECEIVER_CAP_SIZE];

	uint8_t psr_dpcd[EDP_PSR_RECEIVER_CAP_SIZE];

	uint8_t downstream_ports[DP_MAX_DOWNSTREAM_PORTS];

	struct i2c_adapter adapter;

	struct i2c_algo_dp_aux_data algo;