Initialize the instance of struct fb_ops with fbdev initializer
macros for framebuffers in I/O address space. Set the read/write,
draw and mmap callbacks to the correct implementation and avoid
implicit defaults. Also select the necessary I/O helpers in Kconfig.

Fbdev drivers sometimes rely on the callbacks being NULL for a
default implementation to be invoked; hence requiring the I/O
helpers to be built in any case. Setting all callbacks in all
drivers explicitly will allow to make the I/O helpers optional.
This benefits systems that do not use these functions.

No functional changes.

Signed-off-by: Thomas Zimmermann <[email protected]>
---
 drivers/video/fbdev/Kconfig     | 4 +---
 drivers/video/fbdev/amba-clcd.c | 5 ++---
 2 files changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/video/fbdev/Kconfig b/drivers/video/fbdev/Kconfig
index 94f578a44f275..d7b6e9885fe54 100644
--- a/drivers/video/fbdev/Kconfig
+++ b/drivers/video/fbdev/Kconfig
@@ -118,9 +118,7 @@ config FB_ARMCLCD
        tristate "ARM PrimeCell PL110 support"
        depends on ARM || ARM64 || COMPILE_TEST
        depends on FB && ARM_AMBA && HAS_IOMEM
-       select FB_CFB_FILLRECT
-       select FB_CFB_COPYAREA
-       select FB_CFB_IMAGEBLIT
+       select FB_IOMEM_HELPERS
        select FB_MODE_HELPERS if OF
        select VIDEOMODE_HELPERS if OF
        select BACKLIGHT_CLASS_DEVICE if OF
diff --git a/drivers/video/fbdev/amba-clcd.c b/drivers/video/fbdev/amba-clcd.c
index 24d89e6fb7805..0399db369e709 100644
--- a/drivers/video/fbdev/amba-clcd.c
+++ b/drivers/video/fbdev/amba-clcd.c
@@ -412,13 +412,12 @@ static int clcdfb_mmap(struct fb_info *info,
 
 static const struct fb_ops clcdfb_ops = {
        .owner          = THIS_MODULE,
+       __FB_DEFAULT_IOMEM_OPS_RDWR,
        .fb_check_var   = clcdfb_check_var,
        .fb_set_par     = clcdfb_set_par,
        .fb_setcolreg   = clcdfb_setcolreg,
        .fb_blank       = clcdfb_blank,
-       .fb_fillrect    = cfb_fillrect,
-       .fb_copyarea    = cfb_copyarea,
-       .fb_imageblit   = cfb_imageblit,
+       __FB_DEFAULT_IOMEM_OPS_DRAW,
        .fb_mmap        = clcdfb_mmap,
 };
 
-- 
2.42.0

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