[Intel-gfx] [PATCH 1/6] drm/i915/gt: Ignore TLB invalidations on idle engines

[Andi Shyti]

Hi Mauro,

On Wed, Jun 15, 2022 at 04:27:35PM +0100, Mauro Carvalho Chehab wrote:
> From: Chris Wilson <chris.p.wilson at 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 at intel.com>
> Cc: Fei Yang <fei.yang at intel.com>
> Cc: Andi Shyti <andi.shyti at linux.intel.com>
> Cc: stable at vger.kernel.org
> Acked-by: Thomas Hellström <thomas.hellstrom at linux.intel.com>
> Signed-off-by: Mauro Carvalho Chehab <mchehab at kernel.org>

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

Andi