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.
Cheers,
Emil
Cc: Thomas Klausner <wiz@xxxxxxxxxx>
Cc: Konstantin Belousov <kib@xxxxxxxxxxx>
Cc: Robert Millan <rmh@xxxxxxxxxxx>
Cc: Mark Kettenis <kettenis@xxxxxxxxxxx>
Cc: Jonathan Gray <jsg@xxxxxxxxx>
Cc: François Tigeot <ftigeot@xxxxxxxxxxxx>
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