[RFC PATCH 0/2] libdrm: Add master <> render node helpers

[Emil Velikov]

On 02/02/15 00:14, Emil Velikov wrote:
> Hi all,
> 
> As mentioned a couple of days ago at #dri-devel some(most) users of 
> render nodes tend to rely on strict mapping between the primary and 
> render node. I.e. something along the lines of
> 
>   fstat(render_fd, &sbuf);
>   sprintf(primary_node, "/dev/dri/card%d",
>                         ((sbuf.st_rdev & 0x3f) | 0x80));
> 
> Currently the following are (ab)using the above code:
>  - xf86-video-nouveau
>  - xf86-video-intel
>  - libva (vaapi)
> 
> As reminded by David Herrman, this is not the correct solution - thus 
> I've added a couple of helpers which walk through sysfs of the 
> respecitive device and return the correct device name.
> 
> I'm not 100% happy with the function names, so suggestions are greatly 
> appreciated. Any other comments are also welcome :)
> 
> Note: BSD guys - you'll likely need your own version of these functions.
> 
David, Daniel

Can you please take a look at these two patches. Would be great if we
can minimize the above assumptions before they get too wide spread.

*BSD guys,

Please take a look and/or forward this to the relevant people. I fear
that my *BSD knowledge is virtually none :\

Cheers,
Emil