APPLIED: [PATCH 0/1][SRU][E] Fix i915 power use regression in 5.3

[Khaled Elmously]

On 2020-02-24 15:06:52 , Seth Forshee wrote:
> SRU Justification
> 
> BugLink: https://bugs.launchpad.net/bugs/1853044
> 
> Impact: "drm/i915/gen8+: Add RC6 CTX corruption WA" makes it effectively
> impossible to enter RC6 for some Intel GPUs when a display server is running.
> This results in increased energy usage and temperature.
> 
> Fix: Upstream has changed too much to make the fixes there applicable, but
> Chris Wilson has provided a patch for 5.3, here:
> https://gitlab.freedesktop.org/drm/intel/issues/614#note_366057
> 
> Test Case: See test results on the bug. On an affected machine powertop will
> show increased RC6 usage on an idle desktop after the patch, and other symptoms
> of excessive power use should also subside.
> 
> Regression Potential: The 5.3 patch is pretty straightforward, and only adds
> running of an existing delayed worker to retire GPU requests. No regressions
> have been reported in testing so far.
> 
> Thanks,
> Seth
> 
> ---
> 
> Chris Wilson (1):
>   drm/i915: Schedue request retirement in execlists_user_end()
> 
>  drivers/gpu/drm/i915/gt/intel_lrc.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
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