brcm2708: add linux 4.19 support

Boot tested on Raspberry Pi B+ (BCM2708) and Raspberry Pi 2 (BCM2709)

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

1 files changed, 28 insertions, 0 deletions

diff --git a/target/linux/brcm2708/patches-4.19/950-0367-drm-vc4-Don-t-wait-for-vblank-on-fkms-cursor-updates.patch b/target/linux/brcm2708/patches-4.19/950-0367-drm-vc4-Don-t-wait-for-vblank-on-fkms-cursor-updates.patch
new file mode 100644
index 0000000000..f49a1ce978
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.19/950-0367-drm-vc4-Don-t-wait-for-vblank-on-fkms-cursor-updates.patch
@@ -0,0 +1,28 @@
+From 2e2eb767bf98517b95fc7d7e1d28b802b41bfcd9 Mon Sep 17 00:00:00 2001
+From: Eric Anholt <eric@anholt.net>
+Date: Mon, 5 Feb 2018 18:53:18 +0000
+Subject: [PATCH 367/703] drm/vc4: Don't wait for vblank on fkms cursor
+ updates.
+
+We don't use the same async update path between fkms and normal kms,
+and the normal kms workaround ended up making us wait.  This became a
+larger problem in rpi-4.14.y, as the USB HID update rate throttling
+got (accidentally?) dropped.
+
+Signed-off-by: Eric Anholt <eric@anholt.net>
+---
+ drivers/gpu/drm/vc4/vc4_kms.c | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+--- a/drivers/gpu/drm/vc4/vc4_kms.c
++++ b/drivers/gpu/drm/vc4/vc4_kms.c
+@@ -222,7 +222,8 @@ static int vc4_atomic_commit(struct drm_
+ 	 * drm_atomic_helper_setup_commit() from auto-completing
+ 	 * commit->flip_done.
+ 	 */
+-	state->legacy_cursor_update = false;
++	if (!vc4->firmware_kms)
++		state->legacy_cursor_update = false;
+ 	ret = drm_atomic_helper_setup_commit(state, nonblock);
+ 	if (ret)
+ 		return ret;