drm/msm/dpu: Add mutex lock in control vblank irq

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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@quicinc.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/571854/
Link: https://lore.kernel.org/r/20231212231101.9240-2-quic_parellan@quicinc.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

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This commit is contained in:

Paloma Arellano 2023-12-12 15:10:58 -08:00 • committed by Dmitry Baryshkov

parent 341fb24a67

commit 45284ff733

4 changed files with 47 additions and 23 deletions

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1

drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c

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4

drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h

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32

drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c

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33

drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c

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