[RFC PATCH 144/162] drm/i915: Reset blitter context when unpark engine

[Chris Wilson]

Quoting Matthew Auld (2020-11-27 12:07:00)
> From: Venkata Ramana Nayana <venkata.ramana.nayana at intel.com>
> 
> We are only doing it now for kernel_context. We also need to do for the
> copy engine  blitter context.
> 
> Signed-off-by: Venkata Ramana Nayana <venkata.ramana.nayana at intel.com>
> ---
>  drivers/gpu/drm/i915/gt/intel_engine_pm.c | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/gt/intel_engine_pm.c b/drivers/gpu/drm/i915/gt/intel_engine_pm.c
> index 1b2009b4dcb7..69c8ea70d1e8 100644
> --- a/drivers/gpu/drm/i915/gt/intel_engine_pm.c
> +++ b/drivers/gpu/drm/i915/gt/intel_engine_pm.c
> @@ -66,6 +66,11 @@ static int __engine_unpark(struct intel_wakeref *wf)
>                 ce->ops->reset(ce);
>         }

Add a list of pinned volatile contexts to the engine that must be
restored across resume.
-Chris