[Intel-gfx] [PATCH v2 2/5] drm/i915/selftests: Pretty print engine state when requests fail to start

[Chris Wilson]

During hangcheck testing, we try to execute requests following the GPU
reset, and in particular want to try and debug when those fail.

Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuopp...@intel.com>
---
 drivers/gpu/drm/i915/selftests/intel_hangcheck.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/gpu/drm/i915/selftests/intel_hangcheck.c 
b/drivers/gpu/drm/i915/selftests/intel_hangcheck.c
index 08159b268893..7e1bdd88eda3 100644
--- a/drivers/gpu/drm/i915/selftests/intel_hangcheck.c
+++ b/drivers/gpu/drm/i915/selftests/intel_hangcheck.c
@@ -624,8 +624,11 @@ static int igt_wait_reset(void *arg)
        __i915_add_request(rq, true);
 
        if (!wait_for_hang(&h, rq)) {
+               struct drm_printer p = drm_info_printer(i915->drm.dev);
+
                pr_err("Failed to start request %x, at %x\n",
                       rq->fence.seqno, hws_seqno(&h, rq));
+               intel_engine_dump(rq->engine, &p);
 
                i915_reset(i915, 0);
                i915_gem_set_wedged(i915);
@@ -716,8 +719,12 @@ static int igt_reset_queue(void *arg)
                        __i915_add_request(rq, true);
 
                        if (!wait_for_hang(&h, prev)) {
+                               struct drm_printer p = 
drm_info_printer(i915->drm.dev);
+
                                pr_err("Failed to start request %x, at %x\n",
                                       prev->fence.seqno, hws_seqno(&h, prev));
+                               intel_engine_dump(rq->engine, &p);
+
                                i915_gem_request_put(rq);
                                i915_gem_request_put(prev);
 
@@ -818,8 +825,11 @@ static int igt_handle_error(void *arg)
        __i915_add_request(rq, true);
 
        if (!wait_for_hang(&h, rq)) {
+               struct drm_printer p = drm_info_printer(i915->drm.dev);
+
                pr_err("Failed to start request %x, at %x\n",
                       rq->fence.seqno, hws_seqno(&h, rq));
+               intel_engine_dump(rq->engine, &p);
 
                i915_reset(i915, 0);
                i915_gem_set_wedged(i915);
-- 
2.14.2

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