[PATCH] i915/pmu: Debug pmu failures

[Umesh Nerlige Ramappa]

Dump debug info for PMU failures. Trybot only.

Signed-off-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa at intel.com>
---
 drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
index f8cb7c630d5b..918a6d63dad4 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -1258,6 +1258,8 @@ static void __set_engine_usage_record(struct intel_engine_cs *engine,
 #undef record_write
 }
 
+#define busy_print pr_alert
+
 static void guc_update_engine_gt_clks(struct intel_engine_cs *engine)
 {
 	struct intel_engine_guc_stats *stats = &engine->stats.guc;
@@ -1267,6 +1269,8 @@ static void guc_update_engine_gt_clks(struct intel_engine_cs *engine)
 	lockdep_assert_held(&guc->timestamp.lock);
 
 	__get_engine_usage_record(engine, &last_switch, &ctx_id, &total);
+	busy_print("%s: last_switch = %u, ctx_id %08x, total %u\n",
+		   engine->name, last_switch, ctx_id, total);
 
 	stats->running = ctx_id != ~0U && last_switch;
 	if (stats->running)
@@ -1280,6 +1284,8 @@ static void guc_update_engine_gt_clks(struct intel_engine_cs *engine)
 		stats->total_gt_clks += (u32)(total - stats->prev_total);
 		stats->prev_total = total;
 	}
+	busy_print("%s: running = %u, start_gt_clk = %llu, total_gt_clks = %llu\n",
+		   engine->name, stats->running, stats->start_gt_clk, stats->total_gt_clks);
 }
 
 static u32 gpm_timestamp_shift(struct intel_gt *gt)
@@ -1311,6 +1317,7 @@ static void guc_update_pm_timestamp(struct intel_guc *guc, ktime_t *now)
 		gt_stamp_hi++;
 
 	guc->timestamp.gt_stamp = ((u64)gt_stamp_hi << 32) | gt_stamp_lo;
+	busy_print("[%d] gt timestamp %lld\n", gt->info.id, guc->timestamp.gt_stamp);
 }
 
 /*
@@ -1372,9 +1379,11 @@ static ktime_t guc_engine_busyness(struct intel_engine_cs *engine, ktime_t *now)
 	if (stats->running) {
 		u64 clk = guc->timestamp.gt_stamp - stats->start_gt_clk;
 
+		busy_print("%s: STILL RUNNING\n", engine->name);
 		total += intel_gt_clock_interval_to_ns(gt, clk);
 	}
 
+	busy_print("%s: total %llu, stats->total %llu\n", engine->name, total, stats->total);
 	if (total > stats->total)
 		stats->total = total;
 
-- 
2.43.0