From: Ville Syrjälä
The cursor hardware only does sync updates, and thus the hardware
will be scanning out from the old fb until the next start of vblank.
So in order to make the legacy cursor fastpath actually safe we
should not unpin the old fb until we're sure the hardware has
ceased
On Thu, Nov 16, 2023 at 07:49:40AM +, Shankar, Uma wrote:
>
>
> > -Original Message-
> > From: Intel-gfx On Behalf Of
> > Maarten
> > Lankhorst
> > Sent: Thursday, November 9, 2023 9:05 PM
> > To: intel-gfx@lists.freedesktop.org
> >
> -Original Message-
> From: Intel-gfx On Behalf Of Maarten
> Lankhorst
> Sent: Thursday, November 9, 2023 9:05 PM
> To: intel-gfx@lists.freedesktop.org
> Subject: [Intel-gfx] [PATCH 2/3] drm/i915: Use vblank worker to unpin old
> legacy
> cursor fb safely
From: Ville Syrjälä
The cursor hardware only does sync updates, and thus the hardware
will be scanning out from the old fb until the next start of vblank.
So in order to make the legacy cursor fastpath actually safe we
should not unpin the old fb until we're sure the hardware has
ceased
