> Buffer placement is specified by the DDX/Mesa, when we override that in the
> kernel we just force unnecessary buffer moves.
Since scan out buffer is moved to GTT now, DDX/Mesa might need to make some
changes for this too.
> -----Original Message-----
> From: Christian König [mailto:ckoenig.leichtzumer...@gmail.com]
> Sent: Tuesday, March 06, 2018 1:02 PM
> To: Michel Dänzer <mic...@daenzer.net>; Koenig, Christian
> <christian.koe...@amd.com>; Li, Samuel <samuel...@amd.com>; Alex
> Deucher <alexdeuc...@gmail.com>
> Cc: amd-gfx list <email@example.com>
> Subject: Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support
> Am 06.03.2018 um 18:51 schrieb Michel Dänzer:
> > On 2018-03-06 06:44 PM, Christian König wrote:
> >> Am 06.03.2018 um 18:22 schrieb Li, Samuel:
> >>>> addition to that I agree with Michel that the module parameter is
> >>>> overkill.
> >>> That I already explained. Currently SG display feature needs to
> >>> provide options for all kinds of use cases. All amd drivers so far
> >>> provides options, and the default configuration is actually to
> >>> allocate everything from GTT when possible.
> >> That isn't job of the kernel to have this parameter. Saying that we
> >> should probably add a DDX and/or environment option to control that.
> > Why would we need that? It's the kernel driver's job to handle this as
> > needed.
> Buffer placement is specified by the DDX/Mesa, when we override that in
> the kernel we just force unnecessary buffer moves.
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