[PATCH v3 0/2] Stabilize use of vblank_refcount

Paloma Arellano quic_parellan at quicinc.com
Fri Dec 1 20:11:39 UTC 2023


On 11/30/2023 11:41 PM, Dmitry Baryshkov wrote:
> On Fri, 1 Dec 2023 at 03:41, Paloma Arellano <quic_parellan at quicinc.com> wrote:
>> There is currently a race condition occuring when accessing
>> vblank_refcount. Therefore, vblank irq timeouts may occur.
>>
>> Avoid any vblank irq timeouts by stablizing the use of vblank_refcount.
>>
>> Changes from prior versions:
>>     v2: - Slightly changed wording of patch #2 commit message
>>     v3: - Mistakenly did not change wording of patch #2 in last version.
>>           It is done now.
> Usually sending a series once a day is enough. If you have any pending
> changes, it might be better to reply to your patch stating that you
> want to do this and that, while still allowing reviewers to respond
> (and thus you can incorporate their review in the next iteration).

Ack. Good to know.

Thank you,

Paloma

>> Paloma Arellano (2):
>>    drm/msm/dpu: Modify vblank_refcount if error in callback
>>    drm/msm/dpu: Add mutex lock in control vblank irq
>>
>>   drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c          |  6 ++++++
>>   drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h     |  6 ++++++
>>   drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c | 11 +++++++++--
>>   drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c | 11 +++++++++--
>>   4 files changed, 30 insertions(+), 4 deletions(-)
>>
>> --
>> 2.41.0
>>
>


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