[PATCH v4 1/1] drm/msm/dpu: Add mutex lock in control vblank irq

[Dmitry Baryshkov]

On Wed, 13 Dec 2023 at 01:11, Paloma Arellano <quic_parellan at quicinc.com> wrote:
>
> Add a mutex lock to control vblank irq to synchronize vblank
> enable/disable operations happening from different threads to prevent
> race conditions while registering/unregistering the vblank irq callback.
>
> v4: -Removed vblank_ctl_lock from dpu_encoder_virt, so it is only a
>     parameter of dpu_encoder_phys.
>     -Switch from atomic refcnt to a simple int counter as mutex has
>     now been added
> v3: Mistakenly did not change wording in last version. It is done now.
> v2: Slightly changed wording of commit message
>
> Signed-off-by: Paloma Arellano <quic_parellan at quicinc.com>
> ---
>  drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c   |  1 -
>  .../gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h  |  4 ++-
>  .../drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c  | 32 ++++++++++++------
>  .../drm/msm/disp/dpu1/dpu_encoder_phys_vid.c  | 33 ++++++++++++-------
>  4 files changed, 47 insertions(+), 23 deletions(-)

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov at linaro.org>

-- 
With best wishes
Dmitry