[Intel-gfx] [PATCH 2/4] drm/i915/execlists: Pause CS flow before reset

[Mika Kuoppala]

Chris Wilson <chris at chris-wilson.co.uk> writes:

> Since we may be attempting to reset an active engine, we try to freeze
> it in place before resetting -- to be on the safe side. We can go one
> step further if we are using the CS flow semaphore to prevent the
> context switching into the next.
>
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>

Reviewed-by: Mika Kuoppala <mika.kuoppala at linux.intel.com>

> ---
>  drivers/gpu/drm/i915/gt/intel_lrc.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c b/drivers/gpu/drm/i915/gt/intel_lrc.c
> index 9fff4e02cee6..9e18c0896a83 100644
> --- a/drivers/gpu/drm/i915/gt/intel_lrc.c
> +++ b/drivers/gpu/drm/i915/gt/intel_lrc.c
> @@ -3669,6 +3669,7 @@ static void execlists_reset_prepare(struct intel_engine_cs *engine)
>  	 *
>  	 * FIXME: Wa for more modern gens needs to be validated
>  	 */
> +	ring_set_paused(engine, 1);
>  	intel_engine_stop_cs(engine);
>  }
>  
> -- 
> 2.20.1