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drm/i915/gt: Force the GT reset on shutdown
Before we return control to the system, and letting it reuse all the pages being accessed by HW, we must disable the HW. At the moment, we dare not reset the GPU if it will clobber the display, but once we know the display has been disabled, we can proceed with the reset as we shutdown the module. We know the next user must reinitialise the HW for their purpose. Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/489 Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: stable@kernel.org Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200525151459.12083-1-chris@chris-wilson.co.uk
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