guc_client_alloc — Allocate an i915_guc_client
|struct drm_device * dev,|
|struct i915_gem_context * ctx|
four levels priority _CRITICAL, _HIGH, _NORMAL and _LOW The kernel client to replace ExecList submission is created with NORMAL priority. Priority of a client for scheduler can be HIGH, while a preemption context can use CRITICAL.
the context that owns the client (we use the default render context)