[PATCH 1/2] drm/amdgpu/gmc: always steal the first 32MB of vram for fw hand-over
ckoenig.leichtzumerken at gmail.com
Fri Apr 6 12:26:22 UTC 2018
I feared that you would say that :(
In this case the patches are Acked-by: Christian König
<christian.koenig at amd.com>.
Am 06.04.2018 um 13:23 schrieb Andrey Grodzovsky:
> Me and Alex talked to a BIOS guys yesterday exactly about that, a
> dynamic way to query this info from BIOS, he just told us to reserve
> 32M to cover 4K display.
> On 04/06/2018 04:30 AM, Christian König wrote:
>>> I wonder if there's no way to determine which part of VRAM is being
>>> scanned out. If there was, we could just create a normal BO covering
>>> that, which would get destroyed once no CRTC references it anymore.
>> Unfortunately it goes further than that. The stolen VRAM is needed
>> for VGA emulation, not only for scanout.
>> But yes I agree that we somehow figure that value out from the BIOS.
>> If I'm not completely mistaken I've also seen some atombios table
>> with that info in some discussion.
> amd-gfx mailing list
> amd-gfx at lists.freedesktop.org
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