Quoting Mika Kuoppala (2020-01-29 13:39:12) > To avoid context corruption on some gens, we need to hold forcewake > for long periods of time. This leads to increased energy expenditure > for mostly idle workloads. > > To combat the increased power consumption, park GPU more hastily. > > As the HW isn't so quick to end up in rc6, this software mechanism > supplements it. So we can apply it, across all gens. > > Suggested-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> > Testcase: igt/i915_pm_rc6_residency/rc6-idle > References: "Add RC6 CTX corruption WA" > Cc: Stable <stable@xxxxxxxxxxxxxxx> # v4.19+ > Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> > Signed-off-by: Mika Kuoppala <mika.kuoppala@xxxxxxxxxxxxxxx> Seems to work and play nice with the older style of locking, Reviewed-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> -Chris
