[Intel-gfx] [PATCH] drm/i915: Include RING_MODE when dumping the engine state

[Chris Wilson]

Knowing the RING_MODE flags is useful for checking the state of the
engine, such as whether the CS is idle after trying to stop the engines
before reset.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala at linux.intel.com>
---
 drivers/gpu/drm/i915/intel_engine_cs.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_engine_cs.c b/drivers/gpu/drm/i915/intel_engine_cs.c
index fedb839dff61..e676e345c453 100644
--- a/drivers/gpu/drm/i915/intel_engine_cs.c
+++ b/drivers/gpu/drm/i915/intel_engine_cs.c
@@ -1726,6 +1726,11 @@ void intel_engine_dump(struct intel_engine_cs *engine, struct drm_printer *m)
 	drm_printf(m, "\tRING_CTL:   0x%08x [%s]\n",
 		   I915_READ(RING_CTL(engine->mmio_base)),
 		   I915_READ(RING_CTL(engine->mmio_base)) & (RING_WAIT | RING_WAIT_SEMAPHORE) ? "waiting" : "");
+	if (INTEL_GEN(engine->i915) > 2) {
+		drm_printf(m, "\tRING_MODE:  0x%08x [%s]\n",
+			   I915_READ(RING_MI_MODE(engine->mmio_base)),
+			   I915_READ(RING_MI_MODE(engine->mmio_base)) & (MODE_IDLE) ? "idle" : "");
+	}
 
 	rcu_read_unlock();
 
-- 
2.15.0.rc2