[PATCH xserver] modesetting: Fix page flipping under DRI 3.2.

[Daniel Stone]

On 12 March 2018 at 16:57, Mario Kleiner <mario.kleiner.de at gmail.com> wrote:
> The check for "no modifier specified" in drmmode_is_format_supported()
> should check for DRM_FORMAT_MOD_INVALID, not for zero, as zero actually
> means DRM_FORMAT_MOD_LINEAR.

If I had a time machine, that would probably be the first thing I
would change about the modifiers API.

Reviewed-by: Daniel Stone <daniels at collabora.com>

Cheers,
Daniel