[Intel-gfx] [PATCHv3] drm/i915: Support Async Flip on Linear buffers

[Murthy, Arun R]

> -----Original Message-----
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> Sent: Wednesday, August 24, 2022 5:48 PM
> To: Murthy, Arun R <arun.r.murthy at intel.com>
> Cc: intel-gfx at lists.freedesktop.org; Shankar, Uma <uma.shankar at intel.com>
> Subject: Re: [PATCHv3] drm/i915: Support Async Flip on Linear buffers
> 
> On Wed, Aug 24, 2022 at 03:02:33AM +0000, Murthy, Arun R wrote:
> > > -----Original Message-----
> > > From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> > > Sent: Tuesday, August 23, 2022 6:27 PM
> > > To: Murthy, Arun R <arun.r.murthy at intel.com>
> > > Cc: intel-gfx at lists.freedesktop.org; Shankar, Uma
> > > <uma.shankar at intel.com>
> > > Subject: Re: [PATCHv3] drm/i915: Support Async Flip on Linear
> > > buffers
> > >
> > > On Mon, Jul 04, 2022 at 09:45:48PM +0530, Arun R Murthy wrote:
> > > > Intel Gen do support Async Flip is supported on linear buffers.
> > > > Since we didn't had a use case, it was not enabled. Now that as
> > > > part of hybrid graphics for unsupported hardware pixel formats,
> > > > its being converted to linear memory and then flipped, hence enabling!
> > > > This patch enables support for async on linear buffer.
> > > >
> > > > v2: added use case
> > > > v3: enabled async on linear for pre Gen 12 as well
> > >
> > > I didn't think it went all the way back to gen9?
> > >
> > It's the same as other buffers. I have just added support for linear buffer in
> the present async flip path, so the platforms on which the async flip is
> supported will support linear buffer as well.
> 
> I know what the patch does. But I don't think bspec agrees with it.
> 
I initially had this async on linear buffer support from Gen12 onwards. Will add that check back.

> >
> > > Also we still don't seem to have any tests for this stuff...
> >
> > There is an IGT patch in queue, once this patch is merged, the IGT patch will
> be floated.
> 
> Do the igt stuff first. Then you can at least get some CI results for this stuff.
> 
IGT has be floated. https://patchwork.freedesktop.org/series/107871/

Thanks and Regards,
Arun R Murthy
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