diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0340-drm-vc4-Fix-get_vblank_counter-with-proper-no-op-for.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.4/0340-drm-vc4-Fix-get_vblank_counter-with-proper-no-op-for.patch | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0340-drm-vc4-Fix-get_vblank_counter-with-proper-no-op-for.patch b/target/linux/brcm2708/patches-4.4/0340-drm-vc4-Fix-get_vblank_counter-with-proper-no-op-for.patch new file mode 100644 index 0000000000..ec172d0519 --- /dev/null +++ b/target/linux/brcm2708/patches-4.4/0340-drm-vc4-Fix-get_vblank_counter-with-proper-no-op-for.patch @@ -0,0 +1,31 @@ +From 41a242de6e06a106399d2c713dc4114da3532d22 Mon Sep 17 00:00:00 2001 +From: Mario Kleiner <mario.kleiner.de@gmail.com> +Date: Fri, 6 May 2016 19:26:05 +0200 +Subject: [PATCH 340/423] drm/vc4: Fix get_vblank_counter with proper no-op for + Linux 4.4+ + +get_vblank_counter hooked up to drm_vblank_count() which alway was +non-sensical but didn't hurt in the past. Since Linux 4.4 it +triggers a WARN_ON_ONCE in drm_update_vblank_count on first vblank +irq disable, so fix it by hooking to drm_vblank_no_hw_counter(). + +Tested against Raspian kernel 4.4.8 tree on RPi 2B. + +Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com> +Cc: Eric Anholt <eric@anholt.net> +Signed-off-by: Eric Anholt <eric@anholt.net> +--- + drivers/gpu/drm/vc4/vc4_drv.c | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +--- a/drivers/gpu/drm/vc4/vc4_drv.c ++++ b/drivers/gpu/drm/vc4/vc4_drv.c +@@ -102,7 +102,7 @@ static struct drm_driver vc4_drm_driver + + .enable_vblank = vc4_enable_vblank, + .disable_vblank = vc4_disable_vblank, +- .get_vblank_counter = drm_vblank_count, ++ .get_vblank_counter = drm_vblank_no_hw_counter, + + #if defined(CONFIG_DEBUG_FS) + .debugfs_init = vc4_debugfs_init, |