drm/i915/guc: Add an explicit 'submission_initialized' flag

The LRC descriptor pool is going away. So, stop using it as a check
for whether submission has been initialised or not.

Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220302003357.4188363-3-John.C.Harrison@Intel.com

drivers/gpu/drm/i915/gt/uc/intel_guc.h

@@ -138,6 +138,8 @@ struct intel_guc {
 	bool submission_supported;
 	/** @submission_selected: tracks whether the user enabled GuC submission */
 	bool submission_selected;
+	/** @submission_initialized: tracks whether GuC submission has been initialised */
+	bool submission_initialized;
 	/**
 	 * @rc_supported: tracks whether we support GuC rc on the current platform
 	 */

drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c

@@ -508,7 +508,7 @@ static void guc_lrc_desc_pool_destroy(struct intel_guc *guc)
 
 static inline bool guc_submission_initialized(struct intel_guc *guc)
 {
-	return !!guc->lrc_desc_pool_vaddr;
+	return guc->submission_initialized;
 }
 
 static inline void _reset_lrc_desc(struct intel_guc *guc, u32 id)
@@ -1813,7 +1813,7 @@ int intel_guc_submission_init(struct intel_guc *guc)
 	struct intel_gt *gt = guc_to_gt(guc);
 	int ret;
 
-	if (guc->lrc_desc_pool)
+	if (guc->submission_initialized)
 		return 0;
 
 	ret = guc_lrc_desc_pool_create(guc);
@@ -1832,19 +1832,21 @@ int intel_guc_submission_init(struct intel_guc *guc)
 
 	guc->timestamp.ping_delay = (POLL_TIME_CLKS / gt->clock_frequency + 1) * HZ;
 	guc->timestamp.shift = gpm_timestamp_shift(gt);
+	guc->submission_initialized = true;
 
 	return 0;
 }
 
 void intel_guc_submission_fini(struct intel_guc *guc)
 {
-	if (!guc->lrc_desc_pool)
+	if (!guc->submission_initialized)
 		return;
 
 	guc_flush_destroyed_contexts(guc);
 	guc_lrc_desc_pool_destroy(guc);
 	i915_sched_engine_put(guc->sched_engine);
 	bitmap_free(guc->submission_state.guc_ids_bitmap);
+	guc->submission_initialized = false;
 }
 
 static inline void queue_request(struct i915_sched_engine *sched_engine,