renegade-project/linux-next
2
0
Fork 0
mirror of https://github.com/edk2-porting/linux-next.git synced 2025-01-12 07:34:08 +08:00
Code

drm/vc4: Fix get_vblank_counter with proper no-op for Linux 4.4+

Browse Source 
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>
Reviewed-by: Eric Anholt <eric@anholt.net>
Fixes: c8b75bca92 ("drm/vc4: Add KMS support for Raspberry Pi.")
This commit is contained in:
Mario Kleiner 2016-05-06 19:26:05 +02:00 committed by Eric Anholt
parent 1a695a905c
commit 792293cfd5
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/gpu/drm/vc4/vc4_drv.c
View File

@ -91,7 +91,7 @@ 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,