drm/cirrus: Place GEM BOs in drm_framebuffer

Since drm_framebuffer can now store GEM objects directly, place them
there rather than in our own subclass. As this makes the framebuffer
create_handle and destroy functions the same as the GEM framebuffer
helper, we can reuse those.

Signed-off-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Thierry Reding <treding@nvidia.com>
Cc: Dave Airlie <airlied@redhat.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: virtualization@lists.linux-foundation.org
Link: https://patchwork.freedesktop.org/patch/msgid/20180330141138.28987-1-daniels@collabora.com

drivers/gpu/drm/cirrus/cirrus_drv.h

@@ -119,7 +119,6 @@ struct cirrus_connector {
 
 struct cirrus_framebuffer {
 	struct drm_framebuffer		base;
-	struct drm_gem_object *obj;
 };
 
 struct cirrus_mc {

drivers/gpu/drm/cirrus/cirrus_fbdev.c

@@ -29,7 +29,7 @@ static void cirrus_dirty_update(struct cirrus_fbdev *afbdev,
 	int x2, y2;
 	unsigned long flags;
 
-	obj = afbdev->gfb.obj;
+	obj = afbdev->gfb.base.obj[0];
 	bo = gem_to_cirrus_bo(obj);
 
 	/*
@@ -250,9 +250,9 @@ static int cirrus_fbdev_destroy(struct drm_device *dev,
 
 	drm_fb_helper_unregister_fbi(&gfbdev->helper);
 
-	if (gfb->obj) {
-		drm_gem_object_put_unlocked(gfb->obj);
-		gfb->obj = NULL;
+	if (gfb->base.obj[0]) {
+		drm_gem_object_put_unlocked(gfb->base.obj[0]);
+		gfb->base.obj[0] = NULL;
 	}
 
 	vfree(gfbdev->sysram);

drivers/gpu/drm/cirrus/cirrus_main.c

@@ -10,30 +10,13 @@
  */
 #include <drm/drmP.h>
 #include <drm/drm_crtc_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
 
 #include "cirrus_drv.h"
 
-static int cirrus_create_handle(struct drm_framebuffer *fb,
-				struct drm_file* file_priv,
-				unsigned int* handle)
-{
-	struct cirrus_framebuffer *cirrus_fb = to_cirrus_framebuffer(fb);
-
-	return drm_gem_handle_create(file_priv, cirrus_fb->obj, handle);
-}
-
-static void cirrus_user_framebuffer_destroy(struct drm_framebuffer *fb)
-{
-	struct cirrus_framebuffer *cirrus_fb = to_cirrus_framebuffer(fb);
-
-	drm_gem_object_put_unlocked(cirrus_fb->obj);
-	drm_framebuffer_cleanup(fb);
-	kfree(fb);
-}
-
 static const struct drm_framebuffer_funcs cirrus_fb_funcs = {
-	.create_handle = cirrus_create_handle,
-	.destroy = cirrus_user_framebuffer_destroy,
+	.create_handle = drm_gem_fb_create_handle,
+	.destroy = drm_gem_fb_destroy,
 };
 
 int cirrus_framebuffer_init(struct drm_device *dev,
@@ -44,7 +27,7 @@ int cirrus_framebuffer_init(struct drm_device *dev,
 	int ret;
 
 	drm_helper_mode_fill_fb_struct(dev, &gfb->base, mode_cmd);
-	gfb->obj = obj;
+	gfb->base.obj[0] = obj;
 	ret = drm_framebuffer_init(dev, &gfb->base, &cirrus_fb_funcs);
 	if (ret) {
 		DRM_ERROR("drm_framebuffer_init failed: %d\n", ret);

drivers/gpu/drm/cirrus/cirrus_mode.c

@@ -110,7 +110,7 @@ static int cirrus_crtc_do_set_base(struct drm_crtc *crtc,
 	/* push the previous fb to system ram */
 	if (!atomic && fb) {
 		cirrus_fb = to_cirrus_framebuffer(fb);
-		obj = cirrus_fb->obj;
+		obj = cirrus_fb->base.obj[0];
 		bo = gem_to_cirrus_bo(obj);
 		ret = cirrus_bo_reserve(bo, false);
 		if (ret)
@@ -120,7 +120,7 @@ static int cirrus_crtc_do_set_base(struct drm_crtc *crtc,
 	}
 
 	cirrus_fb = to_cirrus_framebuffer(crtc->primary->fb);
-	obj = cirrus_fb->obj;
+	obj = cirrus_fb->base.obj[0];
 	bo = gem_to_cirrus_bo(obj);
 
 	ret = cirrus_bo_reserve(bo, false);