Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

Am 21.03.2018 um 19:23 schrieb Marek Olšák: On Wed, Mar 21, 2018 at 2:15 PM, Christian König > wrote: Am 21.03.2018 um 19:04 schrieb Marek Olšák: On Wed, Mar 21, 2018 at 10:07 AM, Christian König

Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

On Wed, Mar 21, 2018 at 2:15 PM, Christian König wrote: > Am 21.03.2018 um 19:04 schrieb Marek Olšák: > > On Wed, Mar 21, 2018 at 10:07 AM, Christian König < > christian.koe...@amd.com> wrote: > >> Am 21.03.2018 um 14:57 schrieb Marek Olšák: >> >> On Wed, Mar 21, 2018

Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

Am 21.03.2018 um 19:04 schrieb Marek Olšák: On Wed, Mar 21, 2018 at 10:07 AM, Christian König > wrote: Am 21.03.2018 um 14:57 schrieb Marek Olšák: On Wed, Mar 21, 2018 at 4:13 AM, Christian König

Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

On Wed, Mar 21, 2018 at 10:07 AM, Christian König wrote: > Am 21.03.2018 um 14:57 schrieb Marek Olšák: > > On Wed, Mar 21, 2018 at 4:13 AM, Christian König < > ckoenig.leichtzumer...@gmail.com> wrote: > >> Am 21.03.2018 um 06:08 schrieb Marek Olšák: >> >> On Tue, Mar

RE: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

eucher, Alexander <alexander.deuc...@amd.com>; Alex Deucher <alexdeuc...@gmail.com>; Michel Dänzer <mic...@daenzer.net>; amd-gfx list <amd-gfx@lists.freedesktop.org>; Li, Samuel <samuel...@amd.com> Subject: Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display sup

Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

Am 21.03.2018 um 14:57 schrieb Marek Olšák: On Wed, Mar 21, 2018 at 4:13 AM, Christian König > wrote: Am 21.03.2018 um 06:08 schrieb Marek Olšák: On Tue, Mar 20, 2018 at 4:16 PM, Christian König

Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

On Wed, Mar 21, 2018 at 4:13 AM, Christian König < ckoenig.leichtzumer...@gmail.com> wrote: > Am 21.03.2018 um 06:08 schrieb Marek Olšák: > > On Tue, Mar 20, 2018 at 4:16 PM, Christian König > wrote: > >> That's what I meant with use up the otherwise unused VRAM. I

Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

Am 21.03.2018 um 06:08 schrieb Marek Olšák: On Tue, Mar 20, 2018 at 4:16 PM, Christian König > wrote: That's what I meant with use up the otherwise unused VRAM. I don't see any disadvantage of always setting GTT as second

Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

samuel...@amd.com>; amd-gfx list <amd-gfx@lists.freedesktop.org> *Subject:* Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support That's what I meant with use up the otherwise unused VRAM. I don't see any disadvantage of always setting GTT as second domain on APUs.

RE: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

mic...@daenzer.net>; amd-gfx list <amd-gfx@lists.freedesktop.org>; Marek Olšák <mar...@gmail.com>; Koenig, Christian <christian.koe...@amd.com> Subject: RE: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support O I think we can also have the case of systems with simi

RE: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

com>; Marek Olšák <mar...@gmail.com> Cc: Alex Deucher <alexdeuc...@gmail.com>; Michel Dänzer <mic...@daenzer.net>; Li, Samuel <samuel...@amd.com>; amd-gfx list <amd-gfx@lists.freedesktop.org> Subject: Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display supp

Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

<ckoenig.leichtzumer...@gmail.com> *Sent:* Tuesday, March 20, 2018 2:32:49 PM *To:* Marek Olšák; Koenig, Christian *Cc:* Alex Deucher; Deucher, Alexander; Michel Dänzer; Li, Samuel; amd-gfx list *Subject:* Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support I don't think that is

Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

From: Christian König <ckoenig.leichtzumer...@gmail.com> Sent: Tuesday, March 20, 2018 2:32:49 PM To: Marek Olšák; Koenig, Christian Cc: Alex Deucher; Deucher, Alexander; Michel Dänzer; Li, Samuel; amd-gfx list Subject: Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display supp

Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

I don't think that is a good idea. Ideally GTT should now have the same performance as VRAM on APUs and we should use VRAM only for things where we absolutely have to and to actually use up the otherwise unused VRAM. Can you run some tests with all BOs forced to GTT and see if there is any

Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

On Tue, Mar 20, 2018 at 9:55 AM, Christian König < ckoenig.leichtzumer...@gmail.com> wrote: > Yes, exactly. And if I remember correctly Mesa used to always set GTT as > fallback on APUs, correct? > "used to" is the key part. Mesa doesn't force GTT on APUs anymore. It expects that the combination

Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

Yes, exactly. And if I remember correctly Mesa used to always set GTT as fallback on APUs, correct? The problem seems to be that this fallback isn't set for displayable BOs. So what needs to be done is to just enable this fallback for displayable BOs as well if the kernel can handle it.

Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

In theory, Mesa doesn't have to do anything. It can continue setting VRAM and if the kernel has to put a display buffer into GTT, it doesn't matter (for Mesa). Whether the VRAM placement is really used is largely determined by BO priorities. The way I understand scather/gather is that it only

Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

hristian.koe...@amd.com>; Alex Deucher <alexdeuc...@gmail.com>; Michel > Dänzer <mic...@daenzer.net>; amd-gfx list <amd-gfx@lists.freedesktop.org> > > > Subject: Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support > > > > When Mesa wants a buf

Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

On Mon, Mar 19, 2018 at 4:53 PM, Alex Deucher wrote: > On Mon, Mar 19, 2018 at 4:26 PM, Marek Olšák wrote: > > When Mesa wants a buffer in VRAM, it always sets VRAM. It relies on BO > move > > throttling to prevent unnecessary BO moves. > > > > My

Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

e, it would make sense to put the buffer in vram because otherwise you >> are wasting a comparatively scarce resource. >> >> >> >> Alex >> >> >> >> From: Li, Samuel >> Sent: Monday, March 19, 2018 3:58:52 PM >

RE: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

Samuel Sent: Monday, March 19, 2018 3:58:52 PM To: Deucher, Alexander; Koenig, Christian; Marek Olšák Cc: Alex Deucher; Michel Dänzer; amd-gfx list Subject: RE: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support Alex, I assume you are talking the three scenarios here, 1)VRAM, 2)G

Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

..@gmail.com>; Michel Dänzer < > mic...@daenzer.net>; amd-gfx list <amd-gfx@lists.freedesktop.org> > *Subject:* Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display > support > > > > I'm not sure what you mean by the 3 scenarios. Generally userspace > selects

RE: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

el <samuel...@amd.com>; Koenig, Christian <christian.koe...@amd.com>; Marek Olšák <mar...@gmail.com> Cc: Alex Deucher <alexdeuc...@gmail.com>; Michel Dänzer <mic...@daenzer.net>; amd-gfx list <amd-gfx@lists.freedesktop.org> Subject: Re: [PATCH 1/2] drm/amdgpu: Enable

Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

<amd-gfx@lists.freedesktop.org> Subject: Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support My personal preference is still to plumb this through to mesa rather than forcing it in the kernel. Alex From: amd-gfx <amd-gfx-

Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

stian.koe...@amd.com>; Marek Olšák <mar...@gmail.com> *Cc:* Alex Deucher <alexdeuc...@gmail.com>; Michel Dänzer <mic...@daenzer.net>; amd-gfx list <amd-gfx@lists.freedesktop.org> *Subject:* Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support My personal prefe

RE: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

.@lists.freedesktop.org>> on behalf of Li, Samuel <samuel...@amd.com<mailto:samuel...@amd.com>> Sent: Monday, March 19, 2018 3:50:34 PM To: Koenig, Christian; Marek Olšák Cc: Alex Deucher; Michel Dänzer; amd-gfx list Subject: RE: [PATCH 1/2] drm/amdgpu: Enable scatter gather displ

Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

M To: Koenig, Christian; Marek Olšák Cc: Alex Deucher; Michel Dänzer; amd-gfx list Subject: RE: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support Christian, You misunderstood Alex’s comments, >Regardless of which scenarios we need to support, I think we also need >to really

RE: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

..@daenzer.net>; amd-gfx list <amd-gfx@lists.freedesktop.org> Subject: Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support Quoting Alex: Regardless of which scenarios we need to support, I think we also need to really plumb this through to mesa however since use

Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

<samuel...@amd.com <mailto:samuel...@amd.com>>; Alex Deucher <alexdeuc...@gmail.com <mailto:alexdeuc...@gmail.com>> Cc: amd-gfx list <amd-gfx@lists.freedesktop.org <mailto:amd-gfx@lists.freedesktop.org>> Subject:

Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

lto:alexdeuc...@gmail.com>> Cc: amd-gfx list <amd-gfx@lists.freedesktop.org <mailto:amd-gfx@lists.freedesktop.org>> Subject: Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support Am 08.03.2018 um 09:35 sc

RE: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

istian <christian.koe...@amd.com> Cc: Li, Samuel <samuel...@amd.com>; Michel Dänzer <mic...@daenzer.net>; Alex Deucher <alexdeuc...@gmail.com>; amd-gfx list <amd-gfx@lists.freedesktop.org> Subject: Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support On Mon

Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

-Original Message- >>> From: Koenig, Christian >>> Sent: Thursday, March 08, 2018 4:07 AM >>> To: Michel Dänzer <mic...@daenzer.net>; Li, Samuel >>> <samuel...@amd.com>; Alex Deucher <alexdeuc...@gmail.com> >>> Cc: amd-gfx list <amd-gfx

Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

om>; Alex Deucher <alexdeuc...@gmail.com> Cc: amd-gfx list <amd-gfx@lists.freedesktop.org> Subject: Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support Am 08.03.2018 um 09:35 schrieb Michel Dänzer: On 2018-03-07 10:47 AM, Christian König wrote: Am 07.03.2018 um 09:

RE: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

et>; Li, Samuel > <samuel...@amd.com>; Alex Deucher <alexdeuc...@gmail.com> > Cc: amd-gfx list <amd-gfx@lists.freedesktop.org> > Subject: Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support > > Am 08.03.2018 um 09:35 schrieb Michel Dänzer: > &g

Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

Am 08.03.2018 um 09:35 schrieb Michel Dänzer: On 2018-03-07 10:47 AM, Christian König wrote: Am 07.03.2018 um 09:42 schrieb Michel Dänzer: On 2018-03-06 07:23 PM, Christian König wrote: E.g. the last time I tested it placing things into GTT still resulted in quite a performance penalty for

Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

On 2018-03-07 10:47 AM, Christian König wrote: > Am 07.03.2018 um 09:42 schrieb Michel Dänzer: >> On 2018-03-06 07:23 PM, Christian König wrote: >> >>> E.g. the last time I tested it placing things into GTT still resulted >>> in quite a performance penalty for rendering. >> FWIW, I think the

Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

;> -Original Message- >> From: Samuel Li [mailto:samuel...@amd.com] >> Sent: Wednesday, March 07, 2018 1:54 PM >> To: Alex Deucher <alexdeuc...@gmail.com> >> Cc: Michel Dänzer <mic...@daenzer.net>; Koenig, Christian >> <christian.koe...@amd.com>;

RE: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

Christian > <christian.koe...@amd.com>; amd-gfx list <amd-gfx@lists.freedesktop.org> > Subject: Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support > > > You might also want to prefer VRAM, but also allow buffers to fall > > back to GTT if necessary. >

Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

> You might also want to prefer VRAM, but also allow buffers to fall back to > GTT if > necessary. For display buffer, this case seems not really attractive. When display buffer changes between GTT and VRAM dynamically, our driver needs to adpat too, which is hard to see the benefits and not

Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

On Wed, Mar 7, 2018 at 1:18 PM, Samuel Li wrote: > I think it's not useful though. Think about that, SG display feature is > intended to use as less VRAM as possible. Will someone want a display buffer > sometimes VRAM, sometimes GTT? > Hardly a case to me, and I think it's a

Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

I think it's not useful though. Think about that, SG display feature is intended to use as less VRAM as possible. Will someone want a display buffer sometimes VRAM, sometimes GTT? Hardly a case to me, and I think it's a waste of effort. That also might explain no driver does that now. Sam

Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

On 2018-03-07 06:38 PM, Alex Deucher wrote: > On Wed, Mar 7, 2018 at 12:29 PM, Samuel Li wrote: >> >> Why so complicated? If old user space compatibility is required, just use >> sg_display=0. > > It will always just work in that case and we can adjust for the > optimal

Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

On Wed, Mar 7, 2018 at 12:29 PM, Samuel Li wrote: > > Why so complicated? If old user space compatibility is required, just use > sg_display=0. It will always just work in that case and we can adjust for the optimal scenario by default in all cases without requiring the user

Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

Why so complicated? If old user space compatibility is required, just use sg_display=0. Sam On 2018-03-07 05:12 AM, Michel Dänzer wrote: > On 2018-03-07 11:04 AM, Christian König wrote: >> Am 07.03.2018 um 10:53 schrieb Michel Dänzer: >>> On 2018-03-07 10:47 AM, Christian König wrote:

Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

On 2018-03-07 11:04 AM, Christian König wrote: > Am 07.03.2018 um 10:53 schrieb Michel Dänzer: >> On 2018-03-07 10:47 AM, Christian König wrote: >>> See when I tested this the DDX and Mesa where unmodified, so both still >>> assumed VRAM as placement for scanout BOs, but the kernel forced scanout

Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

Am 07.03.2018 um 10:53 schrieb Michel Dänzer: On 2018-03-07 10:47 AM, Christian König wrote: See when I tested this the DDX and Mesa where unmodified, so both still assumed VRAM as placement for scanout BOs, but the kernel forced scanout BOs into GTT for testing. So what happened was that on

Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

On 2018-03-07 10:47 AM, Christian König wrote: > > See when I tested this the DDX and Mesa where unmodified, so both still > assumed VRAM as placement for scanout BOs, but the kernel forced scanout > BOs into GTT for testing. > > So what happened was that on scanout we moved the VRAM BO to GTT

Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

Am 07.03.2018 um 09:42 schrieb Michel Dänzer: On 2018-03-06 07:23 PM, Christian König wrote: Am 06.03.2018 um 19:15 schrieb Michel Dänzer: On 2018-03-06 07:02 PM, Christian König wrote: Am 06.03.2018 um 18:51 schrieb Michel Dänzer: On 2018-03-06 06:44 PM, Christian König wrote: Am

Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

On 2018-03-06 07:23 PM, Christian König wrote: > Am 06.03.2018 um 19:15 schrieb Michel Dänzer: >> On 2018-03-06 07:02 PM, Christian König wrote: >>> 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:

Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

Am 06.03.2018 um 19:15 schrieb Michel Dänzer: On 2018-03-06 07:02 PM, Christian König wrote: 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

Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

On 2018-03-06 07:02 PM, Christian König wrote: > 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

RE: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

gt; Cc: amd-gfx list <amd-gfx@lists.freedesktop.org> > 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

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

Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

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

Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

: Koenig, Christian Sent: Tuesday, March 06, 2018 12:12 PM To: Li, Samuel <samuel...@amd.com>; Alex Deucher <alexdeuc...@gmail.com> Cc: amd-gfx list <amd-gfx@lists.freedesktop.org> Subject: Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support And exactly that's the proble

RE: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

gt; To: Li, Samuel <samuel...@amd.com>; Alex Deucher > <alexdeuc...@gmail.com> > Cc: amd-gfx list <amd-gfx@lists.freedesktop.org> > Subject: Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support > > And exactly that's the problematical assumption. >

Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

] Sent: Tuesday, March 06, 2018 12:04 PM To: Li, Samuel <samuel...@amd.com> Cc: Koenig, Christian <christian.koe...@amd.com>; amd-gfx list Subject: Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support On Tue, Mar 6, 2018 at 11:49 AM, Samuel Li <samuel...@amd.com> wro

RE: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

m> > Cc: Koenig, Christian <christian.koe...@amd.com>; amd-gfx list g...@lists.freedesktop.org> > Subject: Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support > > On Tue, Mar 6, 2018 at 11:49 AM, Samuel Li <samuel...@amd.com> wrote: > >>&g

Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

On Tue, Mar 6, 2018 at 11:49 AM, Samuel Li wrote: >>> domain = amdgpu_display_framebuffer_domains(adev); >>> +if (domain == AMDGPU_GEM_DOMAIN_GTT) { >>> +DRM_INFO("Scatter gather display: enabled\n"); >>> +} else if (domain & AMDGPU_GEM_DOMAIN_GTT) { >>> +

Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

>> domain = amdgpu_display_framebuffer_domains(adev); >> +if (domain == AMDGPU_GEM_DOMAIN_GTT) { >> +DRM_INFO("Scatter gather display: enabled\n"); >> +} else if (domain & AMDGPU_GEM_DOMAIN_GTT) { >> +DRM_INFO("Scatter gather display: auto\n"); >> +} > > Dito and

Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

There are three major options when SG capability is enabled, 1) Allocate everything when possible from GTT memory 2) Allocate everything when possible from VRAM 3) Allow both VRAM/GTT to be available Each has its own pros/cons, and it has not been decided which direction is going to be used for

Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

On 2018-03-03 12:25 AM, Samuel Li wrote: > It's enabled by default. -1 is auto, to allow both vram and gtt > memory be available, for testing purpose only. Do we really need a module parameter for this? There's already too many of them. The driver should know which to use in which cases, and

Re: [PATCH 1/2] drm/amdgpu: Enable scatter gather display support

Am 03.03.2018 um 00:25 schrieb Samuel Li: It's enabled by default. -1 is auto, to allow both vram and gtt memory be available, for testing purpose only. --- drivers/gpu/drm/amd/amdgpu/amdgpu.h | 1 + drivers/gpu/drm/amd/amdgpu/amdgpu_display.c | 9 +++--