drm/mgag200: Replace struct mga_fbdev with generic framebuffer emulation

This patch replaces mgag200's framebuffer console with DRM's generic
implememtation. All respective code is being removed from the driver.

The console is set up with a shadow buffer. The actual buffer object is
not permanently pinned in video ram, but just another buffer object that
the driver moves in and out of vram as necessary. The driver's function
mga_crtc_do_set_base() used to contain special handling for the framebuffer
console. With the new generic framebuffer, the driver does not need this
code an longer.

For consistency, this patch also changes the preferred framebuffer depth.
The original code used 24 bpp by default and 32 bpp for the framebuffer. As
24 bpp is not well supported by userspace anyway, setting 32 bpp as default
makes sense.

v2:
	* rely on fbdev helpers error messages
	* document changes to preferred depth
	* dirty function no longer required

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Noralf Trønnes <noralf@tronnes.org>
Link: https://patchwork.freedesktop.org/patch/315832/

1 files changed, 0 insertions, 19 deletions

diff --git a/drivers/gpu/drm/mgag200/mgag200_drv.h b/drivers/gpu/drm/mgag200/mgag200_drv.h
index 3ab27f1053c1..1c93f8dc08c7 100644
--- a/drivers/gpu/drm/mgag200/mgag200_drv.h
+++ b/drivers/gpu/drm/mgag200/mgag200_drv.h
@@ -99,14 +99,6 @@
 #define to_mga_encoder(x) container_of(x, struct mga_encoder, base)
 #define to_mga_connector(x) container_of(x, struct mga_connector, base)
 
-struct mga_fbdev {
-	struct drm_fb_helper helper; /* must be first */
-	void *sysram;
-	int size;
-	int x1, y1, x2, y2; /* dirty rect */
-	spinlock_t dirty_lock;
-};
-
 struct mga_crtc {
 	struct drm_crtc base;
 	u8 lut_r[256], lut_g[256], lut_b[256];
@@ -180,7 +172,6 @@ struct mga_device {
 	struct mga_mc			mc;
 	struct mga_mode_info		mode_info;
 
-	struct mga_fbdev *mfbdev;
 	struct mga_cursor cursor;
 
 	bool				suspended;
@@ -201,19 +192,9 @@ struct mga_device {
 int mgag200_modeset_init(struct mga_device *mdev);
 void mgag200_modeset_fini(struct mga_device *mdev);
 
-				/* mgag200_fb.c */
-int mgag200_fbdev_init(struct mga_device *mdev);
-void mgag200_fbdev_fini(struct mga_device *mdev);
-
 				/* mgag200_main.c */
 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,
-		   u32 size, bool iskernel,
-		       struct drm_gem_object **obj);
-int mgag200_dumb_create(struct drm_file *file,
-			struct drm_device *dev,
-			struct drm_mode_create_dumb *args);
 
 				/* mgag200_i2c.c */
 struct mga_i2c_chan *mgag200_i2c_create(struct drm_device *dev);