drm/i915: Move engine->submit_request selection to a vfunc

It turns out that we may want to restore the original
engine->submit_request (and engine->schedule) callbacks from more than
just the guc <-> execlists transition. Move this to a vfunc so we can
have a common interface.

v2: Move initial selection to intel_engines_init_common(), repaint vfunc
with engine->set_default_submission (and a similar colour for the
helper).

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170316171305.12972-2-chris@chris-wilson.co.uk

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h
index 8bdba18420fa..847aea554464 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.h
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.h
@@ -273,6 +273,8 @@ struct intel_engine_cs {
         void            (*reset_hw)(struct intel_engine_cs *engine,
                                     struct drm_i915_gem_request *req);
 
+        void            (*set_default_submission)(struct intel_engine_cs *engine);
+
         int             (*context_pin)(struct intel_engine_cs *engine,
                                        struct i915_gem_context *ctx);
         void            (*context_unpin)(struct intel_engine_cs *engine,
@@ -676,4 +678,6 @@ static inline u32 *gen8_emit_pipe_control(u32 *batch, u32 flags, u32 offset)
 bool intel_engine_is_idle(struct intel_engine_cs *engine);
 bool intel_engines_are_idle(struct drm_i915_private *dev_priv);
 
+void intel_engines_reset_default_submission(struct drm_i915_private *i915);
+
 #endif /* _INTEL_RINGBUFFER_H_ */