diff options
| author | Javier Martinez Canillas <javierm@redhat.com> | 2024-09-16 13:00:25 +0200 |
|---|---|---|
| committer | Tzung-Bi Shih <tzungbi@kernel.org> | 2024-09-30 01:40:51 +0000 |
| commit | 6074e905023d09f64f2c896f475820a5623deb2c (patch) | |
| tree | 6056fdf39ece7d3e660a69c90e443317356c63f1 | |
| parent | 9852d85ec9d492ebef56dc5f229416c925758edc (diff) | |
firmware: sysfb: Add a sysfb_handles_screen_info() helper function
That can be used by drivers to check if the Generic System Framebuffers
(sysfb) support can handle the data contained in the global screen_info.
Drivers might need this information to know if have to setup the system
framebuffer, or if they have to delegate this action to sysfb instead.
Suggested-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://lore.kernel.org/r/20240916110040.1688511-2-javierm@redhat.com
Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org>
| -rw-r--r-- | drivers/firmware/sysfb.c | 19 | ||||
| -rw-r--r-- | include/linux/sysfb.h | 7 |
2 files changed, 26 insertions, 0 deletions
diff --git a/drivers/firmware/sysfb.c b/drivers/firmware/sysfb.c index 02a07d3d0d40..770e74be14f3 100644 --- a/drivers/firmware/sysfb.c +++ b/drivers/firmware/sysfb.c @@ -77,6 +77,25 @@ void sysfb_disable(struct device *dev) } EXPORT_SYMBOL_GPL(sysfb_disable); +/** + * sysfb_handles_screen_info() - reports if sysfb handles the global screen_info + * + * Callers can use sysfb_handles_screen_info() to determine whether the Generic + * System Framebuffers (sysfb) can handle the global screen_info data structure + * or not. Drivers might need this information to know if they have to setup the + * system framebuffer, or if they have to delegate this action to sysfb instead. + * + * Returns: + * True if sysfb handles the global screen_info data structure. + */ +bool sysfb_handles_screen_info(void) +{ + const struct screen_info *si = &screen_info; + + return !!screen_info_video_type(si); +} +EXPORT_SYMBOL_GPL(sysfb_handles_screen_info); + #if defined(CONFIG_PCI) static bool sysfb_pci_dev_is_enabled(struct pci_dev *pdev) { diff --git a/include/linux/sysfb.h b/include/linux/sysfb.h index bef5f06a91de..07cbab516942 100644 --- a/include/linux/sysfb.h +++ b/include/linux/sysfb.h @@ -60,12 +60,19 @@ struct efifb_dmi_info { void sysfb_disable(struct device *dev); +bool sysfb_handles_screen_info(void); + #else /* CONFIG_SYSFB */ static inline void sysfb_disable(struct device *dev) { } +static inline bool sysfb_handles_screen_info(void) +{ + return false; +} + #endif /* CONFIG_SYSFB */ #ifdef CONFIG_EFI |