[PATCH i-g-t] i915/drm_fdinfo: Quiesce GPU prior to running some tests

[Dixit, Ashutosh]

On Wed, 02 Oct 2024 14:20:49 -0700, Umesh Nerlige Ramappa wrote:
>
> Sometimes render is still running a remnant of a prior workload when we
> expect it to be idle. This throws some tests off. Ensure that these
> tests wait for a quiescent state prior to checking if render is idle.
>
> Closes: https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/12179
> Signed-off-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa at intel.com>

Reviewed-by: Ashutosh Dixit <ashutosh.dixit at intel.com>

Not related to this patch but little bit confusing, since I thought
drm_fdinfo is driver/vendor agnostic. But this file is i915 specific?
Should probably be named i915_fdinfo.c? Or if it's in intel/ directory
should at least probably work for both i195 and xe? Anyway.