[PATCH 01/13] drm/amdgpu: introduce and honour DRM_FORCE_AUTH workaround

Koenig, Christian Christian.Koenig at amd.com
Tue Jun 4 11:24:38 UTC 2019

Am 04.06.19 um 12:50 schrieb Michel Dänzer:
> On 2019-05-28 10:03 a.m., Koenig, Christian wrote:
>> I rather think that we should go down the route of completely dropping
>> command submission and buffer allocation through the primary node for
>> non master clients. And then as next step at some point drop support for
>> authentication/flink.
> Keep in mind that even display servers aren't DRM master while their VT
> isn't active, so this might be problematic if a display server needs to
> do some command submission / buffer allocation during that time.

If I understand it correctly the DRM fd stays master even when the VT is 
switched away, it's just not the current master any more.

So in this case fpriv->is_master stays true, but 
drm_is_current_master(fpriv) returns false.

And yes we mixed that up in amdgpu, i915 and vmwgfx. Somebody should 
probably write patches to fix this.


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