disp: msm: sde: bound crts and encoders for TUI displays

Currently, when starting a TUI session on a secondary display,
user-mode will select CRTC[1]/DSI-2 to initiate the session in
PVM and select CRTC[0]/DSI-2 in TVM to drive the frame. This
breaks existing cont. splash assumption that secondary display
will be using CRTC[1] in TVM session. Instead, driver can inform
user-mode of the possible CRTCs to use for each of the encoders.

This change sets the possible_crtcs variable on both DSI encoders
so that user-mode selects DSI-1/CRTC[0] and DSI-2/CRTC[1] in the
TVM use case.

Change-Id: Ic68f92901e42db80fb97799a05d11b5f3473af97
Signed-off-by: Amine Najahi <anajahi@codeaurora.org>

msm/sde/sde_kms.c

@@ -3021,6 +3021,40 @@ static int sde_kms_inform_cont_splash_res_disable(struct msm_kms *kms,
 	return 0;
 }
 
+static int sde_kms_vm_trusted_cont_splash_res_init(struct sde_kms *sde_kms)
+{
+	int i;
+	void *display;
+	struct dsi_display *dsi_display;
+	struct drm_encoder *encoder;
+
+	if (!sde_kms)
+		return -EINVAL;
+
+	if (!sde_in_trusted_vm(sde_kms))
+		return 0;
+
+	for (i = 0; i < sde_kms->dsi_display_count; i++) {
+		display = sde_kms->dsi_displays[i];
+		dsi_display = (struct dsi_display *)display;
+
+		if (!dsi_display->bridge->base.encoder) {
+			SDE_ERROR("no encoder on dsi display:%d", i);
+			return -EINVAL;
+		}
+
+		encoder = dsi_display->bridge->base.encoder;
+		encoder->possible_crtcs = 1 << i;
+
+		SDE_DEBUG(
+		"dsi-display:%d encoder id[%d]=%d name=%s crtcs=%x\n", i,
+				encoder->index, encoder->base.id,
+				encoder->name, encoder->possible_crtcs);
+	}
+
+	return 0;
+}
+
 static int sde_kms_cont_splash_config(struct msm_kms *kms)
 {
 	void *display;
@@ -3050,6 +3084,12 @@ static int sde_kms_cont_splash_config(struct msm_kms *kms)
 		return -EINVAL;
 	}
 
+	rc = sde_kms_vm_trusted_cont_splash_res_init(sde_kms);
+	if (rc) {
+		SDE_ERROR("failed vm cont splash resource init, rc=%d", rc);
+		return -EINVAL;
+	}
+
 	if (((sde_kms->splash_data.type == SDE_SPLASH_HANDOFF)
 		&& (!sde_kms->splash_data.num_splash_regions)) ||
 			!sde_kms->splash_data.num_splash_displays) {
@@ -3102,9 +3142,9 @@ static int sde_kms_cont_splash_config(struct msm_kms *kms)
 		encoder->crtc = priv->crtcs[i];
 		crtc = encoder->crtc;
 		splash_display->encoder =  encoder;
-
-		SDE_DEBUG("for dsi-display:%d crtc id = %d enc id =%d\n",
-				i, crtc->base.id, encoder->base.id);
+		SDE_DEBUG("for dsi-display:%d crtc id[%d]:%d enc id[%d]:%d\n",
+				i, crtc->index, crtc->base.id, encoder->index,
+				encoder->base.id);
 
 		mutex_lock(&dev->mode_config.mutex);
 		drm_connector_list_iter_begin(dev, &conn_iter);