drm/i915: Refactor out intel_context_init()

Prior to adding a third instance of intel_context_init() and extending
the information stored therewithin, refactor out the common assignments.

Signed-off-by: Chris Wilson <[e-mail]>
Reviewed-by: Matthew Auld <[e-mail]>
Reviewed-by: Mika Kuoppala <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/gpu/drm/i915/i915_gem_context.c

···
 	ctx->i915 = dev_priv;
 	ctx->sched.priority = I915_USER_PRIORITY(I915_PRIORITY_NORMAL);
 
-	for (n = 0; n < ARRAY_SIZE(ctx->__engine); n++) {
-		struct intel_context *ce = &ctx->__engine[n];
-
-		ce->gem_context = ctx;
-	}
+	for (n = 0; n < ARRAY_SIZE(ctx->__engine); n++)
+		intel_context_init(&ctx->__engine[n], ctx, dev_priv->engine[n]);
 
 	INIT_RADIX_TREE(&ctx->handles_vma, GFP_KERNEL);
 	INIT_LIST_HEAD(&ctx->handles_list);

drivers/gpu/drm/i915/i915_gem_context.h

···
 	kref_put(&ctx->ref, i915_gem_context_release);
 }
 
+static inline void
+intel_context_init(struct intel_context *ce,
+		   struct i915_gem_context *ctx,
+		   struct intel_engine_cs *engine)
+{
+	ce->gem_context = ctx;
+}
+
 #endif /* !__I915_GEM_CONTEXT_H__ */

drivers/gpu/drm/i915/selftests/mock_context.c

···
 	INIT_LIST_HEAD(&ctx->handles_list);
 	INIT_LIST_HEAD(&ctx->hw_id_link);
 
-	for (n = 0; n < ARRAY_SIZE(ctx->__engine); n++) {
-		struct intel_context *ce = &ctx->__engine[n];
-
-		ce->gem_context = ctx;
-	}
+	for (n = 0; n < ARRAY_SIZE(ctx->__engine); n++)
+		intel_context_init(&ctx->__engine[n], ctx, i915->engine[n]);
 
 	ret = i915_gem_context_pin_hw_id(ctx);
 	if (ret < 0)