Re: [PATCH v9 0/4] drm: Add support for atomic async page-flip

["André Almeida" <andrealmeid@igalia.com>]

Hi Hamza,

Em 22/11/2023 17:23, Hamza Mahfooz escreveu:
> Hi André,
> On 11/22/23 11:19, André Almeida wrote:
>> Hi,
>>
>> This work from me and Simon adds support for DRM_MODE_PAGE_FLIP_ASYNC 
>> through
>> the atomic API. This feature is already available via the legacy API. 
>> The use
>> case is to be able to present a new frame immediately (or as soon as
>> possible), even if after missing a vblank. This might result in 
>> tearing, but
>> it's useful when a high framerate is desired, such as for gaming.
>>
>> Differently from earlier versions, this one refuses to flip if any 
>> prop changes
>> for async flips. The idea is that the fast path of immediate page 
>> flips doesn't
>> play well with modeset changes, so only the fb_id can be changed.
>>
>> Tested with:
>>   - Intel TigerLake-LP GT2
>>   - AMD VanGogh
> 
> Have you had a chance to test this with VRR enabled? Since, I suspect
> this series might break that feature.
> 

Someone asked this question in an earlier version of this patch, and the 
result is that VRR still works as expected. You can follow the thread at 
this link:

https://lore.kernel.org/lkml/b48bd1fc-fcb0-481b-8413-9210d44d709b@igalia.com/

I should have included this note at my cover letter, my bad.

Thanks,
	André