bcm27xx: import latest patches from the RPi foundation

bcm2708: boot tested on RPi B+ v1.2
bcm2709: boot tested on RPi 3B v1.2 and RPi 4B v1.1 4G
bcm2710: boot tested on RPi 3B v1.2
bcm2711: boot tested on RPi 4B v1.1 4G

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

1 files changed, 26 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.4/950-0275-drm-vc4-Ensure-zpos-is-always-initialised.patch b/target/linux/bcm27xx/patches-5.4/950-0275-drm-vc4-Ensure-zpos-is-always-initialised.patch
new file mode 100644
index 0000000000..32a13d9c86
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0275-drm-vc4-Ensure-zpos-is-always-initialised.patch
@@ -0,0 +1,26 @@
+From 9ab46d940789f74980d18715f5715992559ea857 Mon Sep 17 00:00:00 2001
+From: Dave Stevenson <dave.stevenson@raspberrypi.org>
+Date: Fri, 19 Jul 2019 17:49:00 +0100
+Subject: [PATCH] drm/vc4: Ensure zpos is always initialised
+
+The compiler is warning that default_zpos can be used
+uninitialised as there is no default case to catch all plane
+types.
+No other plane types should ever be presented to vc4_fkms_plane_init,
+but add a default case regardless.
+
+Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
+---
+ drivers/gpu/drm/vc4/vc4_firmware_kms.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+--- a/drivers/gpu/drm/vc4/vc4_firmware_kms.c
++++ b/drivers/gpu/drm/vc4/vc4_firmware_kms.c
+@@ -804,6 +804,7 @@ static struct drm_plane *vc4_fkms_plane_
+ 	 * other layers as requested by KMS.
+ 	 */
+ 	switch (type) {
++	default:
+ 	case DRM_PLANE_TYPE_PRIMARY:
+ 		default_zpos = 0;
+ 		break;