drm/i915/gt: Ignore TLB invalidations on idle engines

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, thus reducing the
performance regression impact due to it.

This becomes more significant with GuC, as it can only do so when
the connection to the GuC is awake.

Cc: [email protected]
Fixes: 7938d61591d3 ("drm/i915: Flush TLBs before releasing backing store")
Signed-off-by: Chris Wilson <[email protected]>
Cc: Fei Yang <[email protected]>
Reviewed-by: Andi Shyti <[email protected]>
Acked-by: Thomas Hellström <[email protected]>
Acked-by: Tvrtko Ursulin <[email protected]>
Signed-off-by: Mauro Carvalho Chehab <[email protected]>
Signed-off-by: Andi Shyti <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/278a57a672edac75683f0818b292e95da583a5fe.1658924372.git.mchehab@kernel.org
(cherry picked from commit 4bedceaed1ae1172cfe72d3ff752b3a1d32fe4d9)
Signed-off-by: Rodrigo Vivi <[email protected]>

0 files changed, 0 insertions, 0 deletions