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-rw-r--r--target/linux/bcm27xx/patches-5.4/950-0551-drm-vc4-plane-Create-more-planes.patch32
1 files changed, 32 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0551-drm-vc4-plane-Create-more-planes.patch b/target/linux/bcm27xx/patches-5.4/950-0551-drm-vc4-plane-Create-more-planes.patch
new file mode 100644
index 0000000000..08383e3708
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0551-drm-vc4-plane-Create-more-planes.patch
@@ -0,0 +1,32 @@
+From b79a33509a3aa863cdf54d24e1a4a0cc2c6fe84c Mon Sep 17 00:00:00 2001
+From: Maxime Ripard <maxime@cerno.tech>
+Date: Thu, 6 Feb 2020 14:52:42 +0100
+Subject: [PATCH] drm/vc4: plane: Create more planes
+
+Let's now create more planes that can be affected to all the CRTCs.
+
+vc4 has 3 CRTCs, 1 primary and 1 cursor each, and was having 24 (8
+planes per CRTC) overlays.
+
+However, vc5 has 5 CRTCs, so keeping the same logic would put us at 50
+planes which is well above the 32 planes limit imposed by DRM.
+
+Using 16 seems like a good tradeoff between staying under 32 and yet
+providing enough planes.
+
+Signed-off-by: Maxime Ripard <maxime@cerno.tech>
+---
+ drivers/gpu/drm/vc4/vc4_plane.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/drivers/gpu/drm/vc4/vc4_plane.c
++++ b/drivers/gpu/drm/vc4/vc4_plane.c
+@@ -1453,7 +1453,7 @@ int vc4_plane_create_additional_planes(s
+ * modest number of planes to expose, that should hopefully
+ * still cover any sane usecase.
+ */
+- for (i = 0; i < 8; i++) {
++ for (i = 0; i < 16; i++) {
+ struct drm_plane *plane =
+ vc4_plane_init(drm, DRM_PLANE_TYPE_OVERLAY);
+