Re: [PATCH v4 1/4] fb: Add dev_of_fbinfo() helper for optional sysfs support
From: Thomas Zimmermann <tzimmermann@suse.de>
Date: 2026-01-07 07:32:36
Also in:
linux-fbdev, linux-omap, linux-staging, lkml
Am 07.01.26 um 05:42 schrieb Chintan Patel:
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 <redacted>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
quoted hunk ↗ jump to hunk
--- include/linux/fb.h | 9 +++++++++ 1 file changed, 9 insertions(+)diff --git a/include/linux/fb.h b/include/linux/fb.h index 05cc251035da..dad3fb61a06a 100644 --- a/include/linux/fb.h +++ b/include/linux/fb.h@@ -628,6 +628,15 @@ 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) {
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