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SubjectRe: [PATCH 1/6] drm/i915/gt: Ignore TLB invalidations on idle engines
Hi Mauro,

On Wed, Jun 15, 2022 at 04:27:35PM +0100, Mauro Carvalho Chehab wrote:
> From: Chris Wilson <chris.p.wilson@intel.com>
>
> As an extension of the current skip TLB invalidations,
> check if the device is powered down prior to any engine activity,
>
> as, on such cases, all the TLBs were already invalidated, so an
> explicit TLB invalidation is not needed.
>
> This becomes more significant with GuC, as it can only do so when
> the connection to the GuC is awake.
>
> Fixes: 7938d61591d3 ("drm/i915: Flush TLBs before releasing backing store")
>
> Signed-off-by: Chris Wilson <chris.p.wilson@intel.com>
> Cc: Fei Yang <fei.yang@intel.com>
> Cc: Andi Shyti <andi.shyti@linux.intel.com>
> Cc: stable@vger.kernel.org
> Acked-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
> Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>

Andi

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