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.das@xxxxxxxxx> --- 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
