[PATCH] drm: Harmonize CIK ASIC support in radeon and amdgpu (v2)

[Felix Kuehling]

On 17-04-25 02:28 AM, Michel Dänzer wrote:
> On 22/04/17 02:05 AM, Felix Kuehling wrote:
>> __setup doesn't work in modules.
> Right. We could build something like
> drivers/video/fbdev/core/fb_cmdline.c:video_setup() into the kernel to
> handle this, but it's a bit ugly, which is one reason why I was leaning
> towards:
>
>
>> s8250_options is only compiled if the driver is not a module.
> That doesn't prevent us from using __module_param_call directly, does it?
>
> Although, that still doesn't work as I envision if only one driver's
> option is set e.g. in /etc/modprobe.d/*.conf .
>
>
> So, I'm starting to think we need a shared module for this, which
> provides one or multiple module parameters to choose which driver to use
> for CIK/SI[0], and provides the result to the amdgpu/radeon drivers.
> That might make things easier for amdgpu-pro / other standalone amdgpu
> versions in the long run as well, as they could add files to
> /etc/modprobe.d/ choosing themselves by default, without having to
> blacklist radeon.
>
> What do you guys think?

Hi Michel,

You said in an earlier email that it doesn't have to be convenient. With
that in mind, I went back to a minimalistic solution that doesn't need
any additional Kconfig options and only uses two module parameters (one
in radeon, one in amdgpu).

I'm attaching my WIP patches for reference (currently based on
amd-kfd-staging). For an official review I'd rebase them on
amd-staging-4.9, remove the #if-0-ed hack that didn't work out, and add
the same for SI.

Can everyone can agree that this is good enough?

Regards,
  Felix

>
>
> [0] or possibly even more fine-grained in the future
>

-------------- next part --------------
A non-text attachment was scrubbed...
Name: 0001-drm-radeon-Add-module-param-to-control-CIK-support.patch
Type: text/x-patch
Size: 2684 bytes
Desc: not available
URL: <https://lists.freedesktop.org/archives/amd-gfx/attachments/20170426/7063f353/attachment-0002.bin>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 0002-drm-amdgpu-Add-module-param-to-control-CIK-support.patch
Type: text/x-patch
Size: 3815 bytes
Desc: not available
URL: <https://lists.freedesktop.org/archives/amd-gfx/attachments/20170426/7063f353/attachment-0003.bin>