[Intel-gfx] [PATCH i-g-t 1/2] tests/debugfs_test: Try to light all outputs to increase chances of finding fails.

[Pandiyan, Dhinakaran]

On Wed, 2017-10-11 at 12:28 +0200, Maarten Lankhorst wrote:
> Op 10-10-17 om 22:12 schreef Chris Wilson:
> > Quoting Maarten Lankhorst (2017-10-10 17:04:27)
> >> Make sure read_all_entries has all outputs possible enabled, but also
> >> add a test that runs with all outputs disabled.
> >>
> >> This will maximize coverage of debugfs reading, and allows the test not
> >> to be dependent on fbcon for setup.
> >>
> >> Signed-off-by: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
> > My only argument, but this is just one special case out of many, isn't
> > really an argument but an endorsement.
> >
> > Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>
> > -Chris
> 
> This test seems to cause a failure in igt..
> 
> https://intel-gfx-ci.01.org/tree/drm-tip/IGTPW_315/fi-glk-1/igt@debugfs_test@read_all_entries.html
> 
> Dhinakaran, any idea about the DP crc failure?
> 
> ~Maarten
> 

I accidentally reproduced this by reading the CRC debugfs when eDP was
off (pipe was active as per i915_display_info). Wonder if this is an
indication that the panel did not really light up in your case. It'd be
good to see what's happening on the screen if you have physical access
to the machine.