[Intel-gfx] [PATCH] drm/i915: Bail if we do not setup the RCS engine

[Chris Wilson]

On Tue, Apr 11, 2017 at 04:30:22PM +0100, Chris Wilson wrote:
> In places, we assume that RCS exists. This has been true forever, but
> let us catch this failure during bringup by adding an explicit check
> that we do have an RCS engine.
> 
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> ---
>  drivers/gpu/drm/i915/intel_engine_cs.c | 8 +++++++-
>  1 file changed, 7 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_engine_cs.c b/drivers/gpu/drm/i915/intel_engine_cs.c
> index 71e89a93fe18..3595209d86cf 100644
> --- a/drivers/gpu/drm/i915/intel_engine_cs.c
> +++ b/drivers/gpu/drm/i915/intel_engine_cs.c
> @@ -154,9 +154,9 @@ int intel_engines_init_early(struct drm_i915_private *dev_priv)
>  {
>  	struct intel_device_info *device_info = mkwrite_device_info(dev_priv);
>  	unsigned int ring_mask = INTEL_INFO(dev_priv)->ring_mask;

If there's buy in for this check, can I make this const ring_mask?
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre