During resime, the steer semaphore on GT1 was observed to be held. The
hardware team has confirmed the safety of clearing the steer semaphore
during driver load/resume, as no lock acquisitions can occur in this
process by other agents.
Signed-off-by: Nirmoy Das <nirmoy....@intel.com>
---
drivers/gpu/drm/i915/gt/intel_gt.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/gpu/drm/i915/gt/intel_gt.c
b/drivers/gpu/drm/i915/gt/intel_gt.c
index 93062c35e072..f6d9aba9ebb0 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt.c
+++ b/drivers/gpu/drm/i915/gt/intel_gt.c
@@ -686,6 +686,17 @@ int intel_gt_init(struct intel_gt *gt)
if (err)
return err;
+ /*
+ * Reset the steer semaphore on GT1, as we have observed it
+ * remaining held after a suspend operation. Confirmation
+ * from the hardware team ensures the safety of resetting
+ * the steer semaphore during driver load/resume, as there
+ * are no lock acquisitions during this process by other
+ * agents.
+ */
+ if (MEDIA_VER(gt->i915) >= 13 && gt->type == GT_MEDIA)
+ intel_gt_mcr_lock_reset(gt);
+
intel_gt_init_workarounds(gt);
/*
--
2.41.0
