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 <tzimmermann@xxxxxxx>
---
drivers/video/fbdev/Kconfig | 1 +
drivers/video/fbdev/pm2fb.c | 2 ++
2 files changed, 3 insertions(+)
diff --git a/drivers/video/fbdev/Kconfig b/drivers/video/fbdev/Kconfig
index 8b387d98f6b1e..ba5fc63691b16 100644
--- a/drivers/video/fbdev/Kconfig
+++ b/drivers/video/fbdev/Kconfig
@@ -94,6 +94,7 @@ config FB_PM2
select FB_CFB_FILLRECT
select FB_CFB_COPYAREA
select FB_CFB_IMAGEBLIT
+ select FB_IOMEM_FOPS
select VIDEO_NOMODESET
help
This is the frame buffer device driver for cards based on
diff --git a/drivers/video/fbdev/pm2fb.c b/drivers/video/fbdev/pm2fb.c
index 5a79a12efd8e3..f34429829b7d7 100644
--- a/drivers/video/fbdev/pm2fb.c
+++ b/drivers/video/fbdev/pm2fb.c
@@ -1492,6 +1492,7 @@ static int pm2fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
static const struct fb_ops pm2fb_ops = {
.owner = THIS_MODULE,
+ __FB_DEFAULT_IOMEM_OPS_RDWR,
.fb_check_var = pm2fb_check_var,
.fb_set_par = pm2fb_set_par,
.fb_setcolreg = pm2fb_setcolreg,
@@ -1502,6 +1503,7 @@ static const struct fb_ops pm2fb_ops = {
.fb_imageblit = pm2fb_imageblit,
.fb_sync = pm2fb_sync,
.fb_cursor = pm2fb_cursor,
+ __FB_DEFAULT_IOMEM_OPS_MMAP,
};
/*
--
2.42.0
