If something, the usual suspect being bios, access hw behind our back, dont let it slide into situation where normal register access will detect this and spit out a warn on into dmesg. On some bdw bioses this happens during igt/bat run always and as there is not much we can do about it, its better just to detect and flush this explicitly on resume and only print a debug message.
Testcase: igt/pm_rpm/basic-rte Cc: Chris Wilson <ch...@chris-wilson.co.uk> Cc: Paulo Zanoni <przan...@gmail.com> Cc: Daniel Vetter <daniel.vet...@intel.com> Signed-off-by: Mika Kuoppala <mika.kuopp...@intel.com> --- drivers/gpu/drm/i915/i915_drv.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index e6935f1..4efe7f0 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -1477,6 +1477,9 @@ static int intel_runtime_suspend(struct device *device) cancel_delayed_work_sync(&dev_priv->gpu_error.hangcheck_work); intel_uncore_forcewake_reset(dev, false); + if (intel_uncore_unclaimed_access(dev)) + DRM_ERROR("Unclaimed access detected prior suspending\n"); + dev_priv->pm.suspended = true; /* @@ -1522,6 +1525,8 @@ static int intel_runtime_resume(struct device *device) intel_opregion_notify_adapter(dev, PCI_D0); dev_priv->pm.suspended = false; + if (intel_uncore_unclaimed_access(dev)) + DRM_DEBUG_KMS("Unclaimed access during suspend, bios?\n"); intel_guc_resume(dev); -- 2.5.0 _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx