[PATCH] drm: add drm device name

Michel Dänzer michel at daenzer.net
Tue Sep 17 09:23:37 UTC 2019

On 2019-09-17 10:23 a.m., Koenig, Christian wrote:
> Am 17.09.19 um 10:17 schrieb Daniel Vetter:
>> On Tue, Sep 17, 2019 at 10:12 AM Christian König
>> <ckoenig.leichtzumerken at gmail.com> wrote:
>>> Am 17.09.19 um 07:47 schrieb Jani Nikula:
>>>> On Mon, 16 Sep 2019, Marek Olšák <maraeo at gmail.com> wrote:
>>>>> The purpose is to get rid of all PCI ID tables for all drivers in
>>>>> userspace. (or at least stop updating them)
>>>>> Mesa common code and modesetting will use this.
>>>> I'd think this would warrant a high level description of what you want
>>>> to achieve in the commit message.
>>> And maybe explicitly call it uapi_name or even uapi_driver_name.
>> If it's uapi_name, then why do we need a new one for every generation?
>> Userspace drivers tend to span a lot more than just 1 generation. And
>> if you want to have per-generation data from the kernel to userspace,
>> then imo that's much better suited in some amdgpu ioctl, instead of
>> trying to encode that into the driver name.
> Well we already have an IOCTL for that, but I thought the intention here 
> was to get rid of the PCI-ID tables in userspace to figure out which 
> driver to load.

That's just unrealistic in general, I'm afraid. See e.g. the ongoing
transition from i965 to iris for recent Intel hardware. How is the
kernel supposed to know which driver is to be used?

For the Xorg modesetting driver, there's a simple solution, see
https://gitlab.freedesktop.org/xorg/xserver/merge_requests/278 .
Something similar can probably be done in Mesa as well.

Earthling Michel Dänzer               |               https://redhat.com
Libre software enthusiast             |             Mesa and X developer

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