drm/i915/gt: Reset twice
authorChris Wilson <chris@chris-wilson.co.uk>
Mon, 12 Dec 2022 16:13:38 +0000 (17:13 +0100)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 18 Jan 2023 10:48:49 +0000 (11:48 +0100)
commit1a8431cc202aa33f8c23bf0be3c9bcf689a3edeb
tree90b87deb514bac44acfb14828b18edf8a1af06d6
parent011ecdbcd520c90c344b872ca6b4821f7783b2f8
drm/i915/gt: Reset twice

commit d3de5616d36462a646f5b360ba82d3b09ff668eb upstream.

After applying an engine reset, on some platforms like Jasperlake, we
occasionally detect that the engine state is not cleared until shortly
after the resume. As we try to resume the engine with volatile internal
state, the first request fails with a spurious CS event (it looks like
it reports a lite-restore to the hung context, instead of the expected
idle->active context switch).

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: stable@vger.kernel.org
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Signed-off-by: Andi Shyti <andi.shyti@linux.intel.com>
Reviewed-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221212161338.1007659-1-andi.shyti@linux.intel.com
(cherry picked from commit 3db9d590557da3aa2c952f2fecd3e9b703dad790)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/gpu/drm/i915/gt/intel_reset.c