drm/mgag200: Replace struct mga_framebuffer with GEM framebuffer helpers

The mgag200 driver's struct mga_framebuffer is a buffer object with GEM
interface. There are already GEM framebuffer helpers that implement the
same functionality. Convert mgag200 to these.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20190627080909.30471-1-tzimmermann@suse.de

drivers/gpu/drm/mgag200/mgag200_drv.h

@@ -100,16 +100,9 @@
 #define to_mga_crtc(x) container_of(x, struct mga_crtc, base)
 #define to_mga_encoder(x) container_of(x, struct mga_encoder, base)
 #define to_mga_connector(x) container_of(x, struct mga_connector, base)
-#define to_mga_framebuffer(x) container_of(x, struct mga_framebuffer, base)
-
-struct mga_framebuffer {
-	struct drm_framebuffer base;
-	struct drm_gem_object *obj;
-};
 
 struct mga_fbdev {
 	struct drm_fb_helper helper; /* must be first */
-	struct mga_framebuffer mfb;
 	void *sysram;
 	int size;
 	int x1, y1, x2, y2; /* dirty rect */
@@ -215,12 +208,6 @@ int mgag200_fbdev_init(struct mga_device *mdev);
 void mgag200_fbdev_fini(struct mga_device *mdev);
 
 				/* mgag200_main.c */
-int mgag200_framebuffer_init(struct drm_device *dev,
-			     struct mga_framebuffer *mfb,
-			     const struct drm_mode_fb_cmd2 *mode_cmd,
-			     struct drm_gem_object *obj);
-
-
 int mgag200_driver_load(struct drm_device *dev, unsigned long flags);
 void mgag200_driver_unload(struct drm_device *dev);
 int mgag200_gem_create(struct drm_device *dev,

drivers/gpu/drm/mgag200/mgag200_fb.c

@@ -11,6 +11,7 @@
 #include <drm/drmP.h>
 #include <drm/drm_util.h>
 #include <drm/drm_fb_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
 #include <drm/drm_crtc_helper.h>
 
 #include "mgag200_drv.h"
@@ -19,19 +20,18 @@ static void mga_dirty_update(struct mga_fbdev *mfbdev,
 			     int x, int y, int width, int height)
 {
 	int i;
-	struct drm_gem_object *obj;
 	struct drm_gem_vram_object *gbo;
 	int src_offset, dst_offset;
-	int bpp = mfbdev->mfb.base.format->cpp[0];
 	int ret;
 	u8 *dst;
 	bool unmap = false;
 	bool store_for_later = false;
 	int x2, y2;
 	unsigned long flags;
+	struct drm_framebuffer *fb = mfbdev->helper.fb;
+	int bpp = fb->format->cpp[0];
 
-	obj = mfbdev->mfb.obj;
-	gbo = drm_gem_vram_of_gem(obj);
+	gbo = drm_gem_vram_of_gem(fb->obj[0]);
 
 	if (drm_can_sleep()) {
 		/* We pin the BO so it won't be moved during the
@@ -89,8 +89,7 @@ static void mga_dirty_update(struct mga_fbdev *mfbdev,
 
 	for (i = y; i <= y2; i++) {
 		/* assume equal stride for now */
-		src_offset = dst_offset =
-			i * mfbdev->mfb.base.pitches[0] + (x * bpp);
+		src_offset = dst_offset = i * fb->pitches[0] + (x * bpp);
 		memcpy_toio(dst + dst_offset, mfbdev->sysram + src_offset,
 			    (x2 - x + 1) * bpp);
 	}
@@ -192,24 +191,24 @@ static int mgag200fb_create(struct drm_fb_helper *helper,
 	sysram = vmalloc(size);
 	if (!sysram) {
 		ret = -ENOMEM;
-		goto err_sysram;
+		goto err_drm_gem_object_put_unlocked;
 	}
 
 	info = drm_fb_helper_alloc_fbi(helper);
 	if (IS_ERR(info)) {
 		ret = PTR_ERR(info);
-		goto err_alloc_fbi;
+		goto err_vfree;
 	}
 
-	ret = mgag200_framebuffer_init(dev, &mfbdev->mfb, &mode_cmd, gobj);
-	if (ret)
-		goto err_alloc_fbi;
+	fb = drm_gem_fbdev_fb_create(dev, sizes, 0, gobj, NULL);
+	if (IS_ERR(fb)) {
+		ret = PTR_ERR(fb);
+		goto err_vfree;
+	}
 
 	mfbdev->sysram = sysram;
 	mfbdev->size = size;
 
-	fb = &mfbdev->mfb.base;
-
 	/* setup helper */
 	mfbdev->helper.fb = fb;
 
@@ -230,29 +229,21 @@ static int mgag200fb_create(struct drm_fb_helper *helper,
 
 	return 0;
 
-err_alloc_fbi:
+err_vfree:
 	vfree(sysram);
-err_sysram:
+err_drm_gem_object_put_unlocked:
 	drm_gem_object_put_unlocked(gobj);
-
 	return ret;
 }
 
 static int mga_fbdev_destroy(struct drm_device *dev,
 				struct mga_fbdev *mfbdev)
 {
-	struct mga_framebuffer *mfb = &mfbdev->mfb;
-
 	drm_fb_helper_unregister_fbi(&mfbdev->helper);
-
-	if (mfb->obj) {
-		drm_gem_object_put_unlocked(mfb->obj);
-		mfb->obj = NULL;
-	}
 	drm_fb_helper_fini(&mfbdev->helper);
+	drm_framebuffer_put(mfbdev->helper.fb);
+
 	vfree(mfbdev->sysram);
-	drm_framebuffer_unregister_private(&mfb->base);
-	drm_framebuffer_cleanup(&mfb->base);
 
 	return 0;
 }

drivers/gpu/drm/mgag200/mgag200_main.c

@@ -9,68 +9,11 @@
  */
 #include <drm/drmP.h>
 #include <drm/drm_crtc_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
 #include "mgag200_drv.h"
 
-static void mga_user_framebuffer_destroy(struct drm_framebuffer *fb)
-{
-	struct mga_framebuffer *mga_fb = to_mga_framebuffer(fb);
-
-	drm_gem_object_put_unlocked(mga_fb->obj);
-	drm_framebuffer_cleanup(fb);
-	kfree(fb);
-}
-
-static const struct drm_framebuffer_funcs mga_fb_funcs = {
-	.destroy = mga_user_framebuffer_destroy,
-};
-
-int mgag200_framebuffer_init(struct drm_device *dev,
-			     struct mga_framebuffer *gfb,
-			     const struct drm_mode_fb_cmd2 *mode_cmd,
-			     struct drm_gem_object *obj)
-{
-	int ret;
-
-	drm_helper_mode_fill_fb_struct(dev, &gfb->base, mode_cmd);
-	gfb->obj = obj;
-	ret = drm_framebuffer_init(dev, &gfb->base, &mga_fb_funcs);
-	if (ret) {
-		DRM_ERROR("drm_framebuffer_init failed: %d\n", ret);
-		return ret;
-	}
-	return 0;
-}
-
-static struct drm_framebuffer *
-mgag200_user_framebuffer_create(struct drm_device *dev,
-				struct drm_file *filp,
-				const struct drm_mode_fb_cmd2 *mode_cmd)
-{
-	struct drm_gem_object *obj;
-	struct mga_framebuffer *mga_fb;
-	int ret;
-
-	obj = drm_gem_object_lookup(filp, mode_cmd->handles[0]);
-	if (obj == NULL)
-		return ERR_PTR(-ENOENT);
-
-	mga_fb = kzalloc(sizeof(*mga_fb), GFP_KERNEL);
-	if (!mga_fb) {
-		drm_gem_object_put_unlocked(obj);
-		return ERR_PTR(-ENOMEM);
-	}
-
-	ret = mgag200_framebuffer_init(dev, mga_fb, mode_cmd, obj);
-	if (ret) {
-		drm_gem_object_put_unlocked(obj);
-		kfree(mga_fb);
-		return ERR_PTR(ret);
-	}
-	return &mga_fb->base;
-}
-
 static const struct drm_mode_config_funcs mga_mode_funcs = {
-	.fb_create = mgag200_user_framebuffer_create,
+	.fb_create = drm_gem_fb_create
 };
 
 static int mga_probe_vram(struct mga_device *mdev, void __iomem *mem)

drivers/gpu/drm/mgag200/mgag200_mode.c

@@ -860,27 +860,21 @@ static int mga_crtc_do_set_base(struct drm_crtc *crtc,
 				int x, int y, int atomic)
 {
 	struct mga_device *mdev = crtc->dev->dev_private;
-	struct drm_gem_object *obj;
-	struct mga_framebuffer *mga_fb;
 	struct drm_gem_vram_object *gbo;
 	int ret;
 	s64 gpu_addr;
 	void *base;
 
 	if (!atomic && fb) {
-		mga_fb = to_mga_framebuffer(fb);
-		obj = mga_fb->obj;
-		gbo = drm_gem_vram_of_gem(obj);
+		gbo = drm_gem_vram_of_gem(fb->obj[0]);
 
 		/* unmap if console */
-		if (&mdev->mfbdev->mfb == mga_fb)
+		if (mdev->mfbdev->helper.fb == fb)
 			drm_gem_vram_kunmap(gbo);
 		drm_gem_vram_unpin(gbo);
 	}
 
-	mga_fb = to_mga_framebuffer(crtc->primary->fb);
-	obj = mga_fb->obj;
-	gbo = drm_gem_vram_of_gem(obj);
+	gbo = drm_gem_vram_of_gem(crtc->primary->fb->obj[0]);
 
 	ret = drm_gem_vram_pin(gbo, DRM_GEM_VRAM_PL_FLAG_VRAM);
 	if (ret)
@@ -891,7 +885,7 @@ static int mga_crtc_do_set_base(struct drm_crtc *crtc,
 		goto err_drm_gem_vram_unpin;
 	}
 
-	if (&mdev->mfbdev->mfb == mga_fb) {
+	if (mdev->mfbdev->helper.fb == crtc->primary->fb) {
 		/* if pushing console in kmap it */
 		base = drm_gem_vram_kmap(gbo, true, NULL);
 		if (IS_ERR(base)) {
@@ -1424,12 +1418,12 @@ static void mga_crtc_disable(struct drm_crtc *crtc)
 	mga_crtc_dpms(crtc, DRM_MODE_DPMS_OFF);
 	if (crtc->primary->fb) {
 		struct mga_device *mdev = crtc->dev->dev_private;
-		struct mga_framebuffer *mga_fb = to_mga_framebuffer(crtc->primary->fb);
-		struct drm_gem_object *obj = mga_fb->obj;
-		struct drm_gem_vram_object *gbo = drm_gem_vram_of_gem(obj);
+		struct drm_framebuffer *fb = crtc->primary->fb;
+		struct drm_gem_vram_object *gbo =
+			drm_gem_vram_of_gem(fb->obj[0]);
 
 		/* unmap if console */
-		if (&mdev->mfbdev->mfb == mga_fb)
+		if (mdev->mfbdev->helper.fb == fb)
 			drm_gem_vram_kunmap(gbo);
 		drm_gem_vram_unpin(gbo);
 	}