Re: [PATCH 00/14] drm/i915: FIFO underrun elimination for PCH platforms

Jani Nikula
2015-10-30T13:27:01Z

On Thu, 29 Oct 2015, ville.syrjala@linux.intel.com wrote:
> From: Ville Syrjälä <ville.syrjala@linux.intel.com>
>
> This series eliminates all spurious PCH FIFO underrun reports on my
> machines during a BAT run ('-t basic -x reload -x suspend' actually).
> It also eliminates the non-spurious but expected underrun reports
> on ILK.
>
> I also embarked on a small scale cleanup of the CPU eDP PLL code while
> I was trying to get to the bottom of the underruns on ILK. So I figured
> I'd include that work here as well.
>
> I've tested this on ILK, SNB, two IVBs, and one HSW, with as many
> displays plugged in as possible. What I could actually test is HSW/BDW
> CRT output since I have no machine for that.
>
> The series is available here:
> git://github.com/vsyrjala/linux.git pch_fifo_underrun_fix_4

I spammed "a few" potentially relevant bugs with test requests:

https://bugs.freedesktop.org/show_bug.cgi?id=74102
https://bugs.freedesktop.org/show_bug.cgi?id=85906
https://bugs.freedesktop.org/show_bug.cgi?id=88977
https://bugs.freedesktop.org/show_bug.cgi?id=89518
https://bugs.freedesktop.org/show_bug.cgi?id=89806
https://bugs.freedesktop.org/show_bug.cgi?id=90239
https://bugs.freedesktop.org/show_bug.cgi?id=90307

BR,
Jani.

--
Jani Nikula, Intel Open Source Technology Center