drm/i915/fb: move user framebuffer stuff to intel_fb.c

Split out fb related stuff from intel_display.c to intel_fb.c.
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/76b61738857619c1cce6e4306d14da19ee3bbf08.1629721467.git.jani.nikula@intel.com

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

@@ -8,10 +8,12 @@
 
 #include <linux/types.h>
 
+struct drm_device;
+struct drm_file;
 struct drm_framebuffer;
-
+struct drm_i915_gem_object;
 struct drm_i915_private;
-
+struct drm_mode_fb_cmd2;
 struct intel_fb_view;
 struct intel_framebuffer;
 struct intel_plane_state;
@@ -57,4 +59,12 @@ void intel_fb_fill_view(const struct intel_framebuffer *fb, unsigned int rotatio
 			struct intel_fb_view *view);
 int intel_plane_compute_gtt(struct intel_plane_state *plane_state);
 
+int intel_framebuffer_init(struct intel_framebuffer *ifb,
+			   struct drm_i915_gem_object *obj,
+			   struct drm_mode_fb_cmd2 *mode_cmd);
+struct drm_framebuffer *
+intel_user_framebuffer_create(struct drm_device *dev,
+			      struct drm_file *filp,
+			      const struct drm_mode_fb_cmd2 *user_mode_cmd);
+
 #endif /* __INTEL_FB_H__ */