[PATCH 04/12] drm/i915/guc: Introduce intel_guc_sanitize

[Sagar Arun Kamble]

Currently GPU is reset at the end of suspend via i915_gem_sanitize.
On resume, GuC will not be loaded until intel_uc_init_hw happens
during GEM resume flow but action to exit sleep wll be send to GuC
considering the FW load status. To make sure we don't invoke that
action update GuC FW load status through new helper
intel_guc_sanitize. Conditional check based on FW fetch status should
take care of driver init flow.

Cc: Michal Wajdeczko <michal.wajdeczko at intel.com>
Cc: Michał Winiarski <michal.winiarski at intel.com>
Signed-off-by: Sagar Arun Kamble <sagar.a.kamble at intel.com>
---
 drivers/gpu/drm/i915/i915_gem.c | 2 ++
 drivers/gpu/drm/i915/intel_uc.c | 8 ++++++++
 drivers/gpu/drm/i915/intel_uc.h | 1 +
 3 files changed, 11 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 581f3a4..a7fa66d 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -4528,6 +4528,8 @@ void i915_gem_sanitize(struct drm_i915_private *i915)
 		mutex_unlock(&i915->drm.struct_mutex);
 	}
 
+	intel_guc_sanitize(&i915->guc);
+
 	/*
 	 * If we inherit context state from the BIOS or earlier occupants
 	 * of the GPU, the GPU may be in an inconsistent state when we
diff --git a/drivers/gpu/drm/i915/intel_uc.c b/drivers/gpu/drm/i915/intel_uc.c
index c3e9477..597ddb3 100644
--- a/drivers/gpu/drm/i915/intel_uc.c
+++ b/drivers/gpu/drm/i915/intel_uc.c
@@ -560,3 +560,11 @@ int intel_guc_sample_forcewake(struct intel_guc *guc)
 
 	return intel_guc_send(guc, action, ARRAY_SIZE(action));
 }
+
+void intel_guc_sanitize(struct intel_guc *guc)
+{
+	if (guc->fw.fetch_status == INTEL_UC_FIRMWARE_SUCCESS)
+		guc->fw.load_status = INTEL_UC_FIRMWARE_PENDING;
+	else
+		guc->fw.load_status = INTEL_UC_FIRMWARE_NONE;
+}
diff --git a/drivers/gpu/drm/i915/intel_uc.h b/drivers/gpu/drm/i915/intel_uc.h
index 3d33a51..da2dc70 100644
--- a/drivers/gpu/drm/i915/intel_uc.h
+++ b/drivers/gpu/drm/i915/intel_uc.h
@@ -213,6 +213,7 @@ struct intel_huc {
 int intel_uc_suspend(struct drm_i915_private *dev_priv);
 int intel_uc_resume(struct drm_i915_private *dev_priv);
 int intel_guc_sample_forcewake(struct intel_guc *guc);
+void intel_guc_sanitize(struct intel_guc *guc);
 int intel_guc_send_nop(struct intel_guc *guc, const u32 *action, u32 len);
 int intel_guc_send_mmio(struct intel_guc *guc, const u32 *action, u32 len);
 
-- 
1.9.1