Re: [PATCH RFC v3 0/7] Async Flip in Atomic ioctl corrections

["Michel Dänzer" <michel.daenzer@mailbox.org>]

On 1/8/26 10:43, Arun R Murthy wrote:
> struct drm_crtc_state {
>          /**
>           * @async_flip:
>           *
>           * This is set when DRM_MODE_PAGE_FLIP_ASYNC is set in the legacy
>           * PAGE_FLIP IOCTL. It's not wired up for the atomic IOCTL
> itself yet.
>           */
>          bool async_flip;
> 
> In the existing code the flag async_flip was intended for the legacy
> PAGE_FLIP IOCTL. But the same is being used for atomic IOCTL.
> As per the hardware feature is concerned, async flip is a plane feature
> and is to be treated per plane basis and not per pipe basis.
> For a given hardware pipe, among the multiple hardware planes, one can
> go with sync flip and other 2/3 can go with async flip.

FWIW, this kind of mix'n'match doesn't seem useful with current UAPI, since no new commit can be made for the async plane(s) before the previous commit for the sync plane(s) has completed, so the async plane(s) can't actually have higher update rate than the sync one(s).


-- 
Earthling Michel Dänzer       \        GNOME / Xwayland / Mesa developer
https://redhat.com             \               Libre software enthusiast