[Intel-gfx] [PATCH 3/6] drm/i915: Show all active engines on hangcheck

[Chris Wilson]

This turns out to be quite useful if one happens to be debugging
semaphore deadlocks.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/intel_hangcheck.c | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_hangcheck.c b/drivers/gpu/drm/i915/intel_hangcheck.c
index 7dc11fcb13de..741441daae32 100644
--- a/drivers/gpu/drm/i915/intel_hangcheck.c
+++ b/drivers/gpu/drm/i915/intel_hangcheck.c
@@ -195,10 +195,6 @@ static void hangcheck_accumulate_sample(struct intel_engine_cs *engine,
 		break;
 
 	case ENGINE_DEAD:
-		if (GEM_SHOW_DEBUG()) {
-			struct drm_printer p = drm_debug_printer("hangcheck");
-			intel_engine_dump(engine, &p, "%s\n", engine->name);
-		}
 		break;
 
 	default:
@@ -285,6 +281,17 @@ static void i915_hangcheck_elapsed(struct work_struct *work)
 			wedged |= intel_engine_flag(engine);
 	}
 
+	if (GEM_SHOW_DEBUG() && (hung | stuck)) {
+		struct drm_printer p = drm_debug_printer("hangcheck");
+
+		for_each_engine(engine, dev_priv, id) {
+			if (intel_engine_is_idle(engine))
+				continue;
+
+			intel_engine_dump(engine, &p, "%s\n", engine->name);
+		}
+	}
+
 	if (wedged) {
 		dev_err(dev_priv->drm.dev,
 			"GPU recovery timed out,"
-- 
2.20.1