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During reset, we try to ensure no forward progress of the CS prior to the reset by setting the STOP_RING bit in RING_MI_MODE. Since gen9, this register is context saved and do we end up in the odd situation where we save the STOP_RING bit and so try to stop the engine again immediately upon resume. This is quite unexpected and causes us to complain about an early CS completion event! Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=111514 Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com> Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20190910080208.4223-1-chris@chris-wilson.co.uk |
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