[waffle] [PATCH] gbm: allow user to specify device

[Chad Versace]

On Sat 15 Aug 2015, Ilia Mirkin wrote:
> Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu>
> ---
>  src/waffle/gbm/wgbm_display.c | 8 ++++++++
>  1 file changed, 8 insertions(+)

Hi Ilia,

The patch, as-is, silently falls back to searching udev if it fails to
open the device path given in the environment. I think that's an
unexpected and surprising failure mode, because the user thinks one
device was opened (the one in the environment) but is given no
indication that a different device was opened.

Like we discussed in IRC, I made a few changes to the patch, and also
fixed the silent failure mode. It's in master now [1]. And I'll add it
to 1.5.2 too (I'm preparing the release notes right now).

[1]: https://github.com/waffle-gl/waffle/commit/cef67496e379b660601f64ab2ddf7cf06307b8aa