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, 70 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.4/950-0544-drm-vc4-plane-Create-overlays-for-any-CRTC.patch b/target/linux/bcm27xx/patches-5.4/950-0544-drm-vc4-plane-Create-overlays-for-any-CRTC.patch
new file mode 100644
index 0000000000..7b9ec02cf6
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0544-drm-vc4-plane-Create-overlays-for-any-CRTC.patch
@@ -0,0 +1,70 @@
+From b65167e0bcce67f2e7b7e813dba536f1cca3ef9f Mon Sep 17 00:00:00 2001
+From: Maxime Ripard <maxime@cerno.tech>
+Date: Thu, 6 Feb 2020 14:50:06 +0100
+Subject: [PATCH] drm/vc4: plane: Create overlays for any CRTC
+
+Now that we have everything in place, we can now register all the overlay
+planes that can be assigned to all the CRTCs.
+
+This has two side effects:
+
+  - The number of overlay planes is reduced from 24 to 8. This is temporary
+    and will be increased again in the next patch.
+
+  - The ID of the various planes is changed again, and we will now have all
+    the primary planes, then all the overlay planes and finally the cursor
+    planes. This shouldn't cause any issue since the ordering between
+    primary, overlay and cursor planes is preserved.
+
+Signed-off-by: Maxime Ripard <maxime@cerno.tech>
+---
+ drivers/gpu/drm/vc4/vc4_plane.c | 35 +++++++++++++++++----------------
+ 1 file changed, 18 insertions(+), 17 deletions(-)
+
+--- a/drivers/gpu/drm/vc4/vc4_plane.c
++++ b/drivers/gpu/drm/vc4/vc4_plane.c
+@@ -1454,26 +1454,27 @@ int vc4_plane_create_additional_planes(s
+ 	struct drm_crtc *crtc;
+ 	unsigned int i;
+ 
+-	drm_for_each_crtc(crtc, drm) {
+-		/* Set up some arbitrary number of planes.  We're not limited
+-		 * by a set number of physical registers, just the space in
+-		 * the HVS (16k) and how small an plane can be (28 bytes).
+-		 * However, each plane we set up takes up some memory, and
+-		 * increases the cost of looping over planes, which atomic
+-		 * modesetting does quite a bit.  As a result, we pick a
+-		 * modest number of planes to expose, that should hopefully
+-		 * still cover any sane usecase.
+-		 */
+-		for (i = 0; i < 8; i++) {
+-			struct drm_plane *plane =
+-				vc4_plane_init(drm, DRM_PLANE_TYPE_OVERLAY);
++	/* Set up some arbitrary number of planes.  We're not limited
++	 * by a set number of physical registers, just the space in
++	 * the HVS (16k) and how small an plane can be (28 bytes).
++	 * However, each plane we set up takes up some memory, and
++	 * increases the cost of looping over planes, which atomic
++	 * modesetting does quite a bit.  As a result, we pick a
++	 * modest number of planes to expose, that should hopefully
++	 * still cover any sane usecase.
++	 */
++	for (i = 0; i < 8; i++) {
++		struct drm_plane *plane =
++			vc4_plane_init(drm, DRM_PLANE_TYPE_OVERLAY);
+ 
+-			if (IS_ERR(plane))
+-				continue;
++		if (IS_ERR(plane))
++			continue;
+ 
+-			plane->possible_crtcs = drm_crtc_mask(crtc);
+-		}
++		plane->possible_crtcs =
++			GENMASK(drm->mode_config.num_crtc - 1, 0);
++	}
+ 
++	drm_for_each_crtc(crtc, drm) {
+ 		/* Set up the legacy cursor after overlay initialization,
+ 		 * since we overlay planes on the CRTC in the order they were
+ 		 * initialized.