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| author |   Mario Kleiner <mario.kleiner.de@gmail.com> | 2016-05-06 19:26:05 +0200 |
|---|---|---|
| committer |   Eric Anholt <eric@anholt.net> | 2016-05-31 15:15:29 -0700 |
| commit | 792293cfd516a173bbd687b4b26da0f97f97abd2 (patch) | |
| tree | 30e94637c6d650e1ef362c1802b7f72fa2e98412 /drivers/gpu/drm/vc4 | |
| parent | Linux 4.7-rc1 (diff) | |
| download | linux-dev-792293cfd516a173bbd687b4b26da0f97f97abd2.tar.xz linux-dev-792293cfd516a173bbd687b4b26da0f97f97abd2.zip | |
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>
Reviewed-by: Eric Anholt <eric@anholt.net>
Fixes: c8b75bca92cb ("drm/vc4: Add KMS support for Raspberry Pi.")
Diffstat (limited to 'drivers/gpu/drm/vc4')
| -rw-r--r-- | drivers/gpu/drm/vc4/vc4_drv.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/vc4/vc4_drv.c b/drivers/gpu/drm/vc4/vc4_drv.c index 3446ece21b4a..ef7de8eb2b63 100644 --- a/drivers/gpu/drm/vc4/vc4_drv.c +++ b/drivers/gpu/drm/vc4/vc4_drv.c @@ -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, |