[Intel-gfx] [RFC] Revert "drm/i915/bdw: Enable execlists by default where supported"

[Daniel, Thomas]

> -----Original Message-----
> From: Paulo Zanoni [mailto:przanoni at gmail.com]
> Sent: Friday, January 02, 2015 5:19 PM
> To: intel-gfx at lists.freedesktop.org
> Cc: Zanoni, Paulo R; Daniel, Thomas
> Subject: [RFC] Revert "drm/i915/bdw: Enable execlists by default where
> supported"
> 
> From: Paulo Zanoni <paulo.r.zanoni at intel.com>
> 
> This reverts commit 27401d126b5b1c8dd4df98bbb60b09ff2b3d5e60.
> 
> When we run the Runtime PM test suite, all the test cases that happen after
> the system-suspend test always fail on my BDW machine.
> 
> Testcase: igt/pm_rpm/system-suspend-execbuf
> Testcase: igt/pm_rpm/system-suspend-modeset
> Testcase: igt/pm_rpm/gem-execbuf-stress (and others ran after the system-
> suspend subtest)
> Cc: Thomas Daniel <thomas.daniel at intel.com>
> Signed-off-by: Paulo Zanoni <paulo.r.zanoni at intel.com>
> ---
>  drivers/gpu/drm/i915/i915_params.c | 4 ++--
>  drivers/gpu/drm/i915/intel_lrc.c   | 3 ++-
>  2 files changed, 4 insertions(+), 3 deletions(-)
> 
> 
> The regression was not detected by PRTS. I guess that is because we don't
> run S3 tests on PRTS? It would be good to find out why and see what we
> could to do run these tests on PRTS.
> 
> I'm going on vacation, so I won't really be able to track the status of this patch
> and that's why I sent the revert without reporting the bug first. I am hoping
> both Daniels will discuss this and decide if they want to merge this or try to
> find the proper fix first.
Please see http://patchwork.freedesktop.org/patch/39970/

Cheers,
Thomas.