drm/i915/psr: enable sink for eDP1.5 Panel Replay

eDP1.5 allows Panel Replay on eDP as well. Take this into account when
enabling sink PSR/Panel Replay. Write also PANEL_REPLAY_CONFIG2 register
accordingly.

v3:
  - set DP_PANEL_REPLAY_CRC_VERIFICATION in PANEL_REPLAY_CONFIG2
  - PANEL_REPLAY_CONFIG2 is available in DP2.1 as well
v2: do not configure ALPM for DP2.0 Panel Replay

Signed-off-by: Jouni Högander <[email protected]>
Reviewed-by: Animesh Manna <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]

Author: hogander

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

@@ -713,14 +713,22 @@ static void _panel_replay_enable_sink(struct intel_dp *intel_dp,
 		DP_PANEL_REPLAY_UNRECOVERABLE_ERROR_EN |
 		DP_PANEL_REPLAY_RFB_STORAGE_ERROR_EN |
 		DP_PANEL_REPLAY_ACTIVE_FRAME_CRC_ERROR_EN;
+	u8 panel_replay_config2 = DP_PANEL_REPLAY_CRC_VERIFICATION;
 
 	if (crtc_state->has_sel_update)
 		val |= DP_PANEL_REPLAY_SU_ENABLE;
 
 	if (crtc_state->enable_psr2_su_region_et)
 		val |= DP_PANEL_REPLAY_ENABLE_SU_REGION_ET;
 
+	if (crtc_state->req_psr2_sdp_prior_scanline)
+		panel_replay_config2 |=
+			DP_PANEL_REPLAY_SU_REGION_SCANLINE_CAPTURE;
+
 	drm_dp_dpcd_writeb(&intel_dp->aux, PANEL_REPLAY_CONFIG, val);
+
+	drm_dp_dpcd_writeb(&intel_dp->aux, PANEL_REPLAY_CONFIG2,
+			   panel_replay_config2);
 }
 
 static void _psr_enable_sink(struct intel_dp *intel_dp,
@@ -751,15 +759,31 @@ static void _psr_enable_sink(struct intel_dp *intel_dp,
 	drm_dp_dpcd_writeb(&intel_dp->aux, DP_PSR_EN_CFG, val);
 }
 
+static void intel_psr_enable_sink_alpm(struct intel_dp *intel_dp,
+				       const struct intel_crtc_state *crtc_state)
+{
+	u8 val;
+
+	/*
+	 * eDP Panel Replay uses always ALPM
+	 * PSR2 uses ALPM but PSR1 doesn't
+	 */
+	if (!intel_dp_is_edp(intel_dp) || (!crtc_state->has_panel_replay &&
+					   !crtc_state->has_sel_update))
+		return;
+
+	val = DP_ALPM_ENABLE | DP_ALPM_LOCK_ERROR_IRQ_HPD_ENABLE;
+
+	if (crtc_state->has_panel_replay)
+		val |= DP_ALPM_MODE_AUX_LESS;
+
+	drm_dp_dpcd_writeb(&intel_dp->aux, DP_RECEIVER_ALPM_CONFIG, val);
+}
+
 void intel_psr_enable_sink(struct intel_dp *intel_dp,
 			   const struct intel_crtc_state *crtc_state)
 {
-	/* Enable ALPM at sink for psr2 */
-	if (!crtc_state->has_panel_replay && crtc_state->has_sel_update)
-		drm_dp_dpcd_writeb(&intel_dp->aux,
-				   DP_RECEIVER_ALPM_CONFIG,
-				   DP_ALPM_ENABLE |
-				   DP_ALPM_LOCK_ERROR_IRQ_HPD_ENABLE);
+	intel_psr_enable_sink_alpm(intel_dp, crtc_state);
 
 	crtc_state->has_panel_replay ?
 		_panel_replay_enable_sink(intel_dp, crtc_state) :