Knowing that GuC will be reset soon, we may stop all communication
immediately without doing graceful cleanup as it is not needed.
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@xxxxxxxxx>
Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@xxxxxxxxx>
---
drivers/gpu/drm/i915/intel_guc_ct.h | 5 +++++
drivers/gpu/drm/i915/intel_uc.c | 13 ++++++++++++-
2 files changed, 17 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/intel_guc_ct.h b/drivers/gpu/drm/i915/intel_guc_ct.h
index f5e7f0663304..41ba593a4df7 100644
--- a/drivers/gpu/drm/i915/intel_guc_ct.h
+++ b/drivers/gpu/drm/i915/intel_guc_ct.h
@@ -96,4 +96,9 @@ void intel_guc_ct_fini(struct intel_guc_ct *ct);
int intel_guc_ct_enable(struct intel_guc_ct *ct);
void intel_guc_ct_disable(struct intel_guc_ct *ct);
+static inline void intel_guc_ct_stop(struct intel_guc_ct *ct)
+{
+ ct->host_channel.enabled = false;
+}
+
#endif /* _INTEL_GUC_CT_H_ */
diff --git a/drivers/gpu/drm/i915/intel_uc.c b/drivers/gpu/drm/i915/intel_uc.c
index 3d81a512e5c8..f17cb3dad90b 100644
--- a/drivers/gpu/drm/i915/intel_uc.c
+++ b/drivers/gpu/drm/i915/intel_uc.c
@@ -224,6 +224,17 @@ static int guc_enable_communication(struct intel_guc *guc)
return 0;
}
+static void guc_stop_communication(struct intel_guc *guc)
+{
+ struct drm_i915_private *i915 = guc_to_i915(guc);
+
+ if (HAS_GUC_CT(i915))
+ intel_guc_ct_stop(&guc->ct);
+
+ guc->send = intel_guc_send_nop;
+ guc->handler = intel_guc_to_host_event_handler_nop;
+}
+
static void guc_disable_communication(struct intel_guc *guc)
{
struct drm_i915_private *i915 = guc_to_i915(guc);
@@ -485,7 +496,7 @@ void intel_uc_reset_prepare(struct drm_i915_private *i915)
if (!USES_GUC(i915))
return;
- guc_disable_communication(guc);
+ guc_stop_communication(guc);
__uc_sanitize(i915);
}
--
2.19.2
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