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fb: Add dev_of_fbinfo() helper for optional sysfs support

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Add dev_of_fbinfo() to return the framebuffer struct device when
CONFIG_FB_DEVICE is enabled, or NULL otherwise.

This allows fbdev drivers to use sysfs interfaces via runtime checks
instead of CONFIG_FB_DEVICE ifdefs, keeping the code clean while
remaining fully buildable.

Suggested-by: Helge Deller <deller@gmx.de>
Reviewed-by: Helge Deller <deller@gmx.de>
Reviewed-by: Andy Shevchenko <andy@kernel.org>
Signed-off-by: Chintan Patel <chintanlike@gmail.com>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Helge Deller <deller@gmx.de>
This commit is contained in:
Chintan Patel 2026-01-06 20:42:54 -08:00 committed by Helge Deller
parent 8f582bcd13
commit 39b65316fe
1 changed files with 9 additions and 0 deletions
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9
include/linux/fb.h
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@ -623,6 +623,15 @@ static inline void unlock_fb_info(struct fb_info *info)
mutex_unlock(&info->lock);
}
static inline struct device *dev_of_fbinfo(const struct fb_info *info)
{
#ifdef CONFIG_FB_DEVICE
return info->dev;
#else
return NULL;
#endif
}
static inline void __fb_pad_aligned_buffer(u8 *dst, u32 d_pitch,
u8 *src, u32 s_pitch, u32 height)
{