[Intel-gfx] [PATCH RESEND i-g-t 1/2] tests/kms_frontbuffer_tracking: Skip if CRTC not selected

[Gabriel Krisman Bertazi]

Paulo Zanoni <paulo.r.zanoni at intel.com> writes:

> Em Qui, 2017-04-20 às 11:11 -0300, Gabriel Krisman Bertazi escreveu:
>> After Linux commit f7e9b004b8a3 ("drm/i915/fbc: inline
>> intel_fbc_can_choose()"), no_fbc_reason will be updated to a new
>> error
>> message if we don't have a plane in the new state, which should make
>> the
>> test skip, but the test code doesn't catch that message and tries to
>
> What was the previous message that was making the test skip? I was not
> expecting that patch would affect kms_frontbuffer_tracking behavior.

The previous message was "FBC disabled: not enough stolen memory".  You
got me wondering if we should even enter that function if
intel_fbc_alloc_cfb failed.  The patch I mentioned starts triggering the
failure because it changes the error message even if we never enter the
for_each_new_plane_in_state loop in intel_fbc_choose_crtc.

Does that makes sense?  Let me take another look at the code and see
what I can come up with.


>
>> execute the test, triggering a test failure.
>
> Anyway, I'm trying to understand the situation here. I'm not sure if
> this fix is correct, I'm wondering if it's a problem in how the Kernel
> sets the messages. Please explain in more details why this patch does
> what it does.
>

-- 
Gabriel Krisman Bertazi