If something, the usual suspect being bios, access hw behind our back, don't 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.
v2: use DRM_DEBUG_DRIVER (Chris) v3: s/access/mmio, s/prior/prior to, s/dev/dev_priv Testcase: igt/pm_rpm/basic-rte Cc: Chris Wilson <[email protected]> Cc: Paulo Zanoni <[email protected]> Cc: Daniel Vetter <[email protected]> Signed-off-by: Mika Kuoppala <[email protected]> Reviewed-by: Chris Wilson <[email protected]> --- 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 8ddfcce..3f2a1d0 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -1478,6 +1478,9 @@ static int intel_runtime_suspend(struct device *device) } intel_uncore_forcewake_reset(dev, false); + if (intel_uncore_unclaimed_mmio(dev_priv)) + DRM_ERROR("Unclaimed access detected prior to suspending\n"); + dev_priv->pm.suspended = true; /* @@ -1523,6 +1526,8 @@ static int intel_runtime_resume(struct device *device) intel_opregion_notify_adapter(dev, PCI_D0); dev_priv->pm.suspended = false; + if (intel_uncore_unclaimed_mmio(dev_priv)) + DRM_DEBUG_DRIVER("Unclaimed access during suspend, bios?\n"); intel_guc_resume(dev); -- 2.5.0 _______________________________________________ Intel-gfx mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/intel-gfx
