[Intel-gfx] [RFC][PATCH 0/2] drm: PATH prop for all connectors?

[Li, Sun peng (Leo)]

On 2019-08-01 5:51 a.m., Pekka Paalanen wrote:
> On Tue, 16 Jul 2019 14:59:58 +0000
> "Li, Sun peng (Leo)" <Sunpeng.Li at amd.com> wrote:
> 
>> On 2019-07-11 3:29 a.m., Pekka Paalanen wrote:
>>> Wait, one can write udev rules for connectors and stuff?
>>> How? What can they do?  
>>
>> I was using it to generate user-friendly device names for the mst aux
>> implementation:
>> https://patchwork.freedesktop.org/patch/315900/?series=63237&rev=2
> 
> Hi,
> 
> what is that device node used for?
> 
> Are the "by-path" symlinks to help a display server associate the
> right device node with the right DRM KMS connector resource?

I intended it to be something more descriptive than the
'/dev/drm_dp_aux0, drm_dp_aux1, drm_dp_aux2, ...'  names, to help users
identify the connector they're addressing in the mst topology. I guess
it could also be used for the purpose you mention as well.

Of course, we'd need more reliable and persistent PATH props first. The
patch was dropped until this happens.

Leo

> 
> The patch commit message did not explain what the names are
> actually used for.
> 
> 
> Thanks,
> pq
>