[Bug 107258] [BAT] igt at drv_selftest@live_guc - dmesg-warn - *ERROR* MMIO: GuC action 0x10 failed with error
bugzilla-daemon at freedesktop.org
bugzilla-daemon at freedesktop.org
Tue Jul 17 08:46:34 UTC 2018
https://bugs.freedesktop.org/show_bug.cgi?id=107258
--- Comment #1 from Chris Wilson <chris at chris-wilson.co.uk> ---
The spam is a regression from
commit 13295bd887d07a9d904401808f41a8d35946d8c2
Author: Michal Wajdeczko <michal.wajdeczko at intel.com>
Date: Mon May 28 17:16:18 2018 +0000
drm/i915/guc: Don't read SOFT_SCRATCH(15) on MMIO error
SOFT_SCRATCH(15) is used by GuC for sending MMIO GuC events to host and
those events are now handled by intel_guc_to_host_event_handler_mmio().
We should not try to read it on MMIO action error as 1) we may be using
different set of registers for GuC MMIO communication, and 2) GuC may
use CTB mechanism for sending events to host.
While here, upgrade error message to DRM_ERROR.
Signed-off-by: Michal Wajdeczko <michal.wajdeczko at intel.com>
Cc: Michel Thierry <michel.thierry at intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
Cc: Chris Wilson <chris at chris-wilson.co.uk>
Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Link:
https://patchwork.freedesktop.org/patch/msgid/20180528171618.10436-1-michal.wajdeczko@intel.com
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