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@xxxxxxxxxxxxxxxxxx> Cc: stable@xxxxxxxxxx --- drivers/gpu/drm/i915/gt/intel_gt.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/gpu/drm/i915/gt/intel_gt.c b/drivers/gpu/drm/i915/gt/intel_gt.c index f069551e412f..4eb81e54ffed 100644 --- a/drivers/gpu/drm/i915/gt/intel_gt.c +++ b/drivers/gpu/drm/i915/gt/intel_gt.c @@ -628,6 +628,12 @@ void intel_gt_driver_release(struct intel_gt *gt) void intel_gt_driver_late_release(struct intel_gt *gt) { + intel_wakeref_t wakeref; + + /* Scrub all HW state upon release */ + with_intel_runtime_pm(gt->uncore->rpm, wakeref) + __intel_gt_reset(gt, ALL_ENGINES); + /* We need to wait for inflight RCU frees to release their grip */ rcu_barrier(); -- 2.20.1 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
