Re: [PATCH] drm/i915/guc: don't hardcode BCS0 in guc_hang selftest

[John Harrison <john.c.harrison@xxxxxxxxx>]

On 11/2/2022 14:43, Daniele Ceraolo Spurio wrote:
> On MTL there are no BCS engines on the media GT, so we can't always use
> BCS0 in the test. There is no actual reason to use a BCS engine over an
> engine of a different class, so switch to using any available engine.
>
> Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@xxxxxxxxx>
> Cc: John Harrison <John.C.Harrison@xxxxxxxxx>
Reviewed-by: John Harrison <John.C.Harrison@xxxxxxxxx>

> ---
>   drivers/gpu/drm/i915/gt/uc/selftest_guc_hangcheck.c | 8 +++++---
>   1 file changed, 5 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/gt/uc/selftest_guc_hangcheck.c b/drivers/gpu/drm/i915/gt/uc/selftest_guc_hangcheck.c
> index 01f8cd3c3134..d91b58f70403 100644
> --- a/drivers/gpu/drm/i915/gt/uc/selftest_guc_hangcheck.c
> +++ b/drivers/gpu/drm/i915/gt/uc/selftest_guc_hangcheck.c
> @@ -35,11 +35,14 @@ static int intel_hang_guc(void *arg)
>   	struct i915_request *rq;
>   	intel_wakeref_t wakeref;
>   	struct i915_gpu_error *global = &gt->i915->gpu_error;
> -	struct intel_engine_cs *engine;
> +	struct intel_engine_cs *engine = intel_selftest_find_any_engine(gt);
>   	unsigned int reset_count;
>   	u32 guc_status;
>   	u32 old_beat;
>   
> +	if (!engine)
> +		return 0;
> +
>   	ctx = kernel_context(gt->i915, NULL);
>   	if (IS_ERR(ctx)) {
>   		drm_err(&gt->i915->drm, "Failed get kernel context: %ld\n", PTR_ERR(ctx));
> @@ -48,14 +51,13 @@ static int intel_hang_guc(void *arg)
>   
>   	wakeref = intel_runtime_pm_get(gt->uncore->rpm);
>   
> -	ce = intel_context_create(gt->engine[BCS0]);
> +	ce = intel_context_create(engine);
>   	if (IS_ERR(ce)) {
>   		ret = PTR_ERR(ce);
>   		drm_err(&gt->i915->drm, "Failed to create spinner request: %d\n", ret);
>   		goto err;
>   	}
>   
> -	engine = ce->engine;
>   	reset_count = i915_reset_count(global);
>   
>   	old_beat = engine->props.heartbeat_interval_ms;