drm/i915: Decouple intel_fb_bo.h interfaces from driver specific types

Make the intel_fb_bo.h interfaces operated purely in base
drm_ types so that each driver (i915 and xe) doesn't have to
know about each other, or the display stuff.

v2: s/dev/drm/ (Jani)

Reviewed-by: Jani Nikula <[e-mail]>
Signed-off-by: Ville Syrjälä <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/gpu/drm/i915/display/intel_fb.c

···
 	int ret = -EINVAL;
 	int i;
 
-	ret = intel_fb_bo_framebuffer_init(intel_fb, obj, mode_cmd);
+	ret = intel_fb_bo_framebuffer_init(fb, obj, mode_cmd);
 	if (ret)
 		return ret;
 
···
 	struct drm_framebuffer *fb;
 	struct drm_gem_object *obj;
 	struct drm_mode_fb_cmd2 mode_cmd = *user_mode_cmd;
-	struct drm_i915_private *i915 = to_i915(dev);
 
-	obj = intel_fb_bo_lookup_valid_bo(i915, filp, &mode_cmd);
+	obj = intel_fb_bo_lookup_valid_bo(dev, filp, &mode_cmd);
 	if (IS_ERR(obj))
 		return ERR_CAST(obj);
 

drivers/gpu/drm/i915/display/intel_fb_bo.c

···
 	/* Nothing to do for i915 */
 }
 
-int intel_fb_bo_framebuffer_init(struct intel_framebuffer *intel_fb,
+int intel_fb_bo_framebuffer_init(struct drm_framebuffer *fb,
 				 struct drm_gem_object *_obj,
 				 struct drm_mode_fb_cmd2 *mode_cmd)
 {
···
 }
 
 struct drm_gem_object *
-intel_fb_bo_lookup_valid_bo(struct drm_i915_private *i915,
+intel_fb_bo_lookup_valid_bo(struct drm_device *drm,
 			    struct drm_file *filp,
 			    const struct drm_mode_fb_cmd2 *mode_cmd)
 {
+	struct drm_i915_private *i915 = to_i915(drm);
 	struct drm_i915_gem_object *obj;
 
 	obj = i915_gem_object_lookup(filp, mode_cmd->handles[0]);

drivers/gpu/drm/i915/display/intel_fb_bo.h

···
 #ifndef __INTEL_FB_BO_H__
 #define __INTEL_FB_BO_H__
 
+struct drm_device;
 struct drm_file;
+struct drm_framebuffer;
 struct drm_gem_object;
-struct drm_i915_private;
 struct drm_mode_fb_cmd2;
-struct intel_framebuffer;
 
 void intel_fb_bo_framebuffer_fini(struct drm_gem_object *obj);
 
-int intel_fb_bo_framebuffer_init(struct intel_framebuffer *intel_fb,
+int intel_fb_bo_framebuffer_init(struct drm_framebuffer *fb,
 				 struct drm_gem_object *obj,
 				 struct drm_mode_fb_cmd2 *mode_cmd);
 
 struct drm_gem_object *
-intel_fb_bo_lookup_valid_bo(struct drm_i915_private *i915,
+intel_fb_bo_lookup_valid_bo(struct drm_device *drm,
 			    struct drm_file *filp,
 			    const struct drm_mode_fb_cmd2 *user_mode_cmd);
 

drivers/gpu/drm/xe/display/intel_fb_bo.c

···
 	xe_bo_put(bo);
 }
 
-int intel_fb_bo_framebuffer_init(struct intel_framebuffer *intel_fb,
+int intel_fb_bo_framebuffer_init(struct drm_framebuffer *fb,
 				 struct drm_gem_object *obj,
 				 struct drm_mode_fb_cmd2 *mode_cmd)
 {
···
 	return ret;
 }
 
-struct drm_gem_object *intel_fb_bo_lookup_valid_bo(struct drm_i915_private *i915,
+struct drm_gem_object *intel_fb_bo_lookup_valid_bo(struct drm_device *drm,
 						   struct drm_file *filp,
 						   const struct drm_mode_fb_cmd2 *mode_cmd)
 {
+	struct xe_device *xe = to_xe_device(drm);
 	struct xe_bo *bo;
 	struct drm_gem_object *gem = drm_gem_object_lookup(filp, mode_cmd->handles[0]);
 
···
 
 	bo = gem_to_xe_bo(gem);
 	/* Require vram placement or dma-buf import */
-	if (IS_DGFX(i915) &&
+	if (IS_DGFX(xe) &&
 	    !xe_bo_can_migrate(bo, XE_PL_VRAM0) &&
 	    bo->ttm.type != ttm_bo_type_sg) {
 		drm_gem_object_put(gem);