On 12-01-2026 16:54, Michel Dänzer wrote:
On 1/12/26 09:26, Murthy, Arun R wrote:
On 09-01-2026 16:53, Michel Dänzer wrote:
On 1/9/26 12:08, Murthy, Arun R wrote:
From: Michel Dänzer <[email protected]>
On 1/8/26 10:43, Arun R Murthy wrote:
Along with async flip if there is a request to disable a sync plane by
providing a NULL fb allow them.
That could result in async changes to other planes taking effect in an earlier
refresh cycle than the sync plane being disabled, couldn't it? In which case the
commit arguably wouldn't actually be "atomic".
This is the request from the community to allow disabling of a sync plane in an
async flip atomic ioctl.
https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/13834
Can't see any such request there. I suspect there might be a misunderstanding.
Here cursor is a sync flip.
https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/13834#note_2855843
Not sure what you mean.
The cursor plane is disabled in KWin's atomic commits with
DRM_MODE_PAGE_FLIP_ASYNC, so it's irrelevant for them.
In the comment following the one you referenced, Xaver (one of the main KWin
developers) agreed that KWin not setting DRM_MODE_PAGE_FLIP_ASYNC in the commit
which disables the cursor plane is fine.
I see no request for being able to mix sync & async plane updates in a single
commit.
Sorry maybe I might be creating more confusion or my words are not
giving clarity.
Let me try to put it in simple words.
The
comment(https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/13834#note_2857640)
from Xaver says that disabling of cursor plane along with a sync flip
should work.
Uma in the
comment(https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/13834#note_2863599)
has acknowledged the changes.
Thanks and Regards,
Arun R Murthy
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