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

[Christian König]

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.

Regards,
Christian.