X-Git-Url: http://git.openwrt.org/?a=blobdiff_plain;f=target%2Flinux%2Fbrcm2708%2Fpatches-4.19%2F950-0540-drm-vc4-Fix-synchronization-firmwarekms-against-GL-r.patch;fp=target%2Flinux%2Fbrcm2708%2Fpatches-4.19%2F950-0540-drm-vc4-Fix-synchronization-firmwarekms-against-GL-r.patch;h=6a3a6b142dcdcc42b5547ffdcab0fc614211192f;hb=67dcc43f3a22dc3a7ac07a7065971b426feeb043;hp=0000000000000000000000000000000000000000;hpb=47a93a810f78adce5a130d287f82b28e9b54313c;p=openwrt%2Fopenwrt.git

diff --git a/target/linux/brcm2708/patches-4.19/950-0540-drm-vc4-Fix-synchronization-firmwarekms-against-GL-r.patch b/target/linux/brcm2708/patches-4.19/950-0540-drm-vc4-Fix-synchronization-firmwarekms-against-GL-r.patch
new file mode 100644
index 0000000000..6a3a6b142d
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.19/950-0540-drm-vc4-Fix-synchronization-firmwarekms-against-GL-r.patch
@@ -0,0 +1,44 @@
+From b0fedd829bb6725fef7b2667c85badc6b4a8e5e0 Mon Sep 17 00:00:00 2001
+From: Eric Anholt <eric@anholt.net>
+Date: Thu, 28 Mar 2019 11:58:51 -0700
+Subject: [PATCH] drm/vc4: Fix synchronization firmwarekms against GL
+ rendering.
+
+We would present the framebuffer immediately without waiting for
+rendering to finish first, resulting in stuttering and flickering as a
+window was dragged around when the GPU was busy enough to not just win
+the race.
+
+Signed-off-by: Eric Anholt <eric@anholt.net>
+---
+ drivers/gpu/drm/vc4/vc4_firmware_kms.c | 5 +++--
+ 1 file changed, 3 insertions(+), 2 deletions(-)
+
+--- a/drivers/gpu/drm/vc4/vc4_firmware_kms.c
++++ b/drivers/gpu/drm/vc4/vc4_firmware_kms.c
+@@ -15,6 +15,7 @@
+  */
+ 
+ #include "drm/drm_atomic_helper.h"
++#include "drm/drm_gem_framebuffer_helper.h"
+ #include "drm/drm_plane_helper.h"
+ #include "drm/drm_crtc_helper.h"
+ #include "drm/drm_fourcc.h"
+@@ -291,7 +292,7 @@ static const struct drm_plane_funcs vc4_
+ };
+ 
+ static const struct drm_plane_helper_funcs vc4_primary_plane_helper_funcs = {
+-	.prepare_fb = NULL,
++	.prepare_fb = drm_gem_fb_prepare_fb,
+ 	.cleanup_fb = NULL,
+ 	.atomic_check = vc4_plane_atomic_check,
+ 	.atomic_update = vc4_primary_plane_atomic_update,
+@@ -299,7 +300,7 @@ static const struct drm_plane_helper_fun
+ };
+ 
+ static const struct drm_plane_helper_funcs vc4_cursor_plane_helper_funcs = {
+-	.prepare_fb = NULL,
++	.prepare_fb = drm_gem_fb_prepare_fb,
+ 	.cleanup_fb = NULL,
+ 	.atomic_check = vc4_plane_atomic_check,
+ 	.atomic_update = vc4_cursor_plane_atomic_update,