HACK: drm/msm/dpu: Give each CRTC a dedicated cursor and primary

Some DE compositors like GNOME's mutter can't handle way too good msm
driver. Handicap it to meet the mistaken expectations of the userspace.

This patch is taken from CROS with minor modifications.

Link: https://chromium.googlesource.com/chromiumos/third_party/kernel/+/30aef5779b6108baaea00750064338bf0ed145c2%5E%21/
Signed-off-by: Nikita Travkin <nikita@trvn.ru>

drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c

@@ -726,6 +726,8 @@ static int _dpu_kms_drm_obj_init(struct dpu_kms *dpu_kms)
 	struct drm_crtc *crtc;
 	struct drm_encoder *encoder;
 	unsigned int num_encoders;
+	unsigned primary_idx = 0;
+	unsigned cursor_idx = 0;
 
 	struct msm_drm_private *priv;
 	const struct dpu_mdss_cfg *catalog;
@@ -753,21 +755,28 @@ static int _dpu_kms_drm_obj_init(struct dpu_kms *dpu_kms)
 	/* Create the planes, keeping track of one primary/cursor per crtc */
 	for (i = 0; i < catalog->sspp_count; i++) {
 		enum drm_plane_type type;
+		unsigned possible_crtcs;
 
 		if ((catalog->sspp[i].features & BIT(DPU_SSPP_CURSOR))
-			&& cursor_planes_idx < max_crtc_count)
+			&& cursor_planes_idx < max_crtc_count) {
 			type = DRM_PLANE_TYPE_CURSOR;
-		else if (primary_planes_idx < max_crtc_count)
+			possible_crtcs = BIT(cursor_idx);
+			cursor_idx++;
+		} else if (primary_planes_idx < max_crtc_count) {
 			type = DRM_PLANE_TYPE_PRIMARY;
-		else
+			possible_crtcs = BIT(primary_idx);
+			primary_idx++;
+		} else {
 			type = DRM_PLANE_TYPE_OVERLAY;
+			possible_crtcs = (1UL << max_crtc_count) - 1;
+		}
 
 		DPU_DEBUG("Create plane type %d with features %lx (cur %lx)\n",
 			  type, catalog->sspp[i].features,
 			  catalog->sspp[i].features & BIT(DPU_SSPP_CURSOR));
 
 		plane = dpu_plane_init(dev, catalog->sspp[i].id, type,
-				       (1UL << max_crtc_count) - 1);
+				       possible_crtcs);
 		if (IS_ERR(plane)) {
 			DPU_ERROR("dpu_plane_init failed\n");
 			ret = PTR_ERR(plane);

drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c

@@ -1496,7 +1496,7 @@ struct drm_plane *dpu_plane_init(struct drm_device *dev,
 	format_list = pdpu->pipe_hw->cap->sblk->format_list;
 	num_formats = pdpu->pipe_hw->cap->sblk->num_formats;
 
-	ret = drm_universal_plane_init(dev, plane, 0xff, &dpu_plane_funcs,
+	ret = drm_universal_plane_init(dev, plane, possible_crtcs, &dpu_plane_funcs,
 				format_list, num_formats,
 				supported_format_modifiers, type, NULL);
 	if (ret)