fbdev/ffb: Use initializer macro for struct fb_ops

Initialize struct fb_ops to the correct default values with the
internal __FB_DEFAULT_SBUS_OPS_*() macros. Rename the ioctl and
mmap callbacks to use the infix _sbusfb_. This makes them fit the
SBUS helpers' naming pattern.

It is not possible to use set all defaults via FB_DEAFULT_SBUS_OPS(),
as ffb provides its own implementation of fb_fillrect, fb_copyarea,
and fb_imageblit. Hence we also avoid FB_SBUS_HELPERS, but let the
driver select its dependencies individually instead.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230806120926.5368-9-tzimmermann@suse.de

drivers/video/fbdev/ffb.c

@@ -36,16 +36,18 @@ static void ffb_imageblit(struct fb_info *, const struct fb_image *);
 static void ffb_fillrect(struct fb_info *, const struct fb_fillrect *);
 static void ffb_copyarea(struct fb_info *, const struct fb_copyarea *);
 static int ffb_sync(struct fb_info *);
-static int ffb_mmap(struct fb_info *, struct vm_area_struct *);
-static int ffb_ioctl(struct fb_info *, unsigned int, unsigned long);
 static int ffb_pan_display(struct fb_var_screeninfo *, struct fb_info *);
 
+static int ffb_sbusfb_mmap(struct fb_info *info, struct vm_area_struct *vma);
+static int ffb_sbusfb_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg);
+
 /*
  *  Frame buffer operations
  */
 
 static const struct fb_ops ffb_ops = {
 	.owner			= THIS_MODULE,
+	__FB_DEFAULT_SBUS_OPS_RDWR(ffb),
 	.fb_setcolreg		= ffb_setcolreg,
 	.fb_blank		= ffb_blank,
 	.fb_pan_display		= ffb_pan_display,
@@ -53,11 +55,8 @@ static const struct fb_ops ffb_ops = {
 	.fb_copyarea		= ffb_copyarea,
 	.fb_imageblit		= ffb_imageblit,
 	.fb_sync		= ffb_sync,
-	.fb_mmap		= ffb_mmap,
-	.fb_ioctl		= ffb_ioctl,
-#ifdef CONFIG_COMPAT
-	.fb_compat_ioctl	= sbusfb_compat_ioctl,
-#endif
+	__FB_DEFAULT_SBUS_OPS_IOCTL(ffb),
+	__FB_DEFAULT_SBUS_OPS_MMAP(ffb),
 };
 
 /* Register layout and definitions */
@@ -849,7 +848,7 @@ static struct sbus_mmap_map ffb_mmap_map[] = {
 	{ .size = 0 }
 };
 
-static int ffb_mmap(struct fb_info *info, struct vm_area_struct *vma)
+static int ffb_sbusfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
 {
 	struct ffb_par *par = (struct ffb_par *)info->par;
 
@@ -858,7 +857,7 @@ static int ffb_mmap(struct fb_info *info, struct vm_area_struct *vma)
 				  0, vma);
 }
 
-static int ffb_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg)
+static int ffb_sbusfb_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg)
 {
 	struct ffb_par *par = (struct ffb_par *)info->par;