drm/i915: Move the port sync DP_TP_CTL stuff to the encoder hook

Move the final DP_TP_CTL frobbing of port sync to the master
encoder's enable hook. Now neatly out of sight from the high level
modeset code.

And thus we've eliminated all the special casing of port sync
in the high level modeset code.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200313164831.5980-14-ville.syrjala@linux.intel.comReviewed-by: José Roberto de Souza <jose.souza@intel.com>

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

@@ -3619,6 +3619,41 @@ void intel_ddi_fdi_post_disable(struct intel_atomic_state *state,
 	intel_de_write(dev_priv, FDI_RX_CTL(PIPE_A), val);
 }
 
+static void trans_port_sync_stop_link_train(struct intel_atomic_state *state,
+					    struct intel_encoder *encoder,
+					    const struct intel_crtc_state *crtc_state)
+{
+	const struct drm_connector_state *conn_state;
+	struct drm_connector *conn;
+	int i;
+
+	if (!crtc_state->sync_mode_slaves_mask)
+		return;
+
+	for_each_new_connector_in_state(&state->base, conn, conn_state, i) {
+		struct intel_encoder *slave_encoder =
+			to_intel_encoder(conn_state->best_encoder);
+		struct intel_crtc *slave_crtc = to_intel_crtc(conn_state->crtc);
+		const struct intel_crtc_state *slave_crtc_state;
+
+		if (!slave_crtc)
+			continue;
+
+		slave_crtc_state =
+			intel_atomic_get_new_crtc_state(state, slave_crtc);
+
+		if (slave_crtc_state->master_transcoder !=
+		    crtc_state->cpu_transcoder)
+			continue;
+
+		intel_dp_stop_link_train(enc_to_intel_dp(slave_encoder));
+	}
+
+	usleep_range(200, 400);
+
+	intel_dp_stop_link_train(enc_to_intel_dp(encoder));
+}
+
 static void intel_enable_ddi_dp(struct intel_atomic_state *state,
 				struct intel_encoder *encoder,
 				const struct intel_crtc_state *crtc_state,
@@ -3639,6 +3674,8 @@ static void intel_enable_ddi_dp(struct intel_atomic_state *state,
 
 	if (crtc_state->has_audio)
 		intel_audio_codec_enable(encoder, crtc_state, conn_state);
+
+	trans_port_sync_stop_link_train(state, encoder, crtc_state);
 }
 
 static i915_reg_t

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

@@ -544,17 +544,23 @@ needs_modeset(const struct intel_crtc_state *state)
 	return drm_atomic_crtc_needs_modeset(&state->uapi);
 }
 
-bool
-is_trans_port_sync_mode(const struct intel_crtc_state *crtc_state)
+static bool
+is_trans_port_sync_slave(const struct intel_crtc_state *crtc_state)
 {
-	return (crtc_state->master_transcoder != INVALID_TRANSCODER ||
-		crtc_state->sync_mode_slaves_mask);
+	return crtc_state->master_transcoder != INVALID_TRANSCODER;
 }
 
 static bool
-is_trans_port_sync_slave(const struct intel_crtc_state *crtc_state)
+is_trans_port_sync_master(const struct intel_crtc_state *crtc_state)
 {
-	return crtc_state->master_transcoder != INVALID_TRANSCODER;
+	return crtc_state->sync_mode_slaves_mask != 0;
+}
+
+bool
+is_trans_port_sync_mode(const struct intel_crtc_state *crtc_state)
+{
+	return is_trans_port_sync_master(crtc_state) ||
+		is_trans_port_sync_slave(crtc_state);
 }
 
 /*
@@ -15103,64 +15109,6 @@ static void intel_commit_modeset_enables(struct intel_atomic_state *state)
 	}
 }
 
-static void intel_set_dp_tp_ctl_normal(struct intel_atomic_state *state,
-				       struct intel_crtc *crtc)
-{
-	struct drm_connector *uninitialized_var(conn);
-	struct drm_connector_state *conn_state;
-	struct intel_dp *intel_dp;
-	int i;
-
-	for_each_new_connector_in_state(&state->base, conn, conn_state, i) {
-		if (conn_state->crtc == &crtc->base)
-			break;
-	}
-	intel_dp = intel_attached_dp(to_intel_connector(conn));
-	intel_dp_stop_link_train(intel_dp);
-}
-
-static void intel_update_trans_port_sync_crtcs(struct intel_atomic_state *state,
-					       struct intel_crtc *crtc)
-{
-	struct drm_i915_private *i915 = to_i915(state->base.dev);
-	const struct intel_crtc_state *new_slave_crtc_state;
-	const struct intel_crtc_state *new_crtc_state =
-		intel_atomic_get_new_crtc_state(state, crtc);
-	struct intel_crtc *slave_crtc;
-	int i;
-
-	for_each_new_intel_crtc_in_state(state, slave_crtc,
-					 new_slave_crtc_state, i) {
-		if (new_slave_crtc_state->master_transcoder !=
-		    new_crtc_state->cpu_transcoder)
-			continue;
-
-		drm_dbg_kms(&i915->drm,
-			    "Updating transcoder port sync slave [CRTC:%d:%s]\n",
-			    slave_crtc->base.base.id, slave_crtc->base.name);
-
-		intel_enable_crtc(state, slave_crtc);
-	}
-
-	drm_dbg_kms(&i915->drm,
-		    "Updating transcoder port sync master [CRTC:%d:%s]\n",
-		    crtc->base.base.id, crtc->base.name);
-
-	intel_enable_crtc(state, crtc);
-
-	for_each_new_intel_crtc_in_state(state, slave_crtc,
-					 new_slave_crtc_state, i) {
-		if (new_slave_crtc_state->master_transcoder !=
-		    new_crtc_state->cpu_transcoder)
-			continue;
-
-		intel_set_dp_tp_ctl_normal(state, slave_crtc);
-	}
-
-	usleep_range(200, 400);
-	intel_set_dp_tp_ctl_normal(state, crtc);
-}
-
 static void icl_dbuf_slice_pre_update(struct intel_atomic_state *state)
 {
 	struct drm_i915_private *dev_priv = to_i915(state->base.dev);
@@ -15260,35 +15208,17 @@ static void skl_commit_modeset_enables(struct intel_atomic_state *state)
 			continue;
 
 		if (intel_dp_mst_is_slave_trans(new_crtc_state) ||
-		    is_trans_port_sync_slave(new_crtc_state))
+		    is_trans_port_sync_master(new_crtc_state))
 			continue;
 
 		modeset_pipes &= ~BIT(pipe);
 
-		if (is_trans_port_sync_mode(new_crtc_state)) {
-			const struct intel_crtc_state *new_slave_crtc_state;
-			struct intel_crtc *slave_crtc;
-			int i;
-
-			intel_update_trans_port_sync_crtcs(state, crtc);
-
-			for_each_new_intel_crtc_in_state(state, slave_crtc,
-							 new_slave_crtc_state, i) {
-				if (new_slave_crtc_state->master_transcoder !=
-				    new_crtc_state->cpu_transcoder)
-					continue;
-
-				modeset_pipes &= ~BIT(slave_crtc->pipe);
-			}
-		} else {
 		intel_enable_crtc(state, crtc);
 	}
-	}
 
 	/*
 	 * Then we enable all remaining pipes that depend on other
-	 * pipes, right now it is only MST slaves as both port sync
-	 * slave and master are enabled together
+	 * pipes: MST slaves and port sync masters.
 	 */
 	for_each_new_intel_crtc_in_state(state, crtc, new_crtc_state, i) {
 		enum pipe pipe = crtc->pipe;