diff options
Diffstat (limited to 'include/linux/fb.h')
| -rw-r--r-- | include/linux/fb.h | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/include/linux/fb.h b/include/linux/fb.h index 907ace3a64c..0c5659c41b0 100644 --- a/include/linux/fb.h +++ b/include/linux/fb.h @@ -3,6 +3,9 @@ #include <linux/types.h> #include <linux/i2c.h> +#ifdef __KERNEL__ +#include <linux/kgdb.h> +#endif /* __KERNEL__ */ /* Definitions of frame buffers */ @@ -607,6 +610,12 @@ struct fb_deferred_io { * LOCKING NOTE: those functions must _ALL_ be called with the console * semaphore held, this is the only suitable locking mechanism we have * in 2.6. Some may be called at interrupt time at this point though. + * + * The exception to this is the debug related hooks. Putting the fb + * into a debug state (e.g. flipping to the kernel console) and restoring + * it must be done in a lock-free manner, so low level drivers should + * keep track of the initial console (if applicable) and may need to + * perform direct, unlocked hardware writes in these hooks. */ struct fb_ops { @@ -676,6 +685,10 @@ struct fb_ops { /* teardown any resources to do with this framebuffer */ void (*fb_destroy)(struct fb_info *info); + + /* called at KDB enter and leave time to prepare the console */ + int (*fb_debug_enter)(struct fb_info *info); + int (*fb_debug_leave)(struct fb_info *info); }; #ifdef CONFIG_FB_TILEBLITTING @@ -786,8 +799,6 @@ struct fb_tile_ops { #define FBINFO_MISC_USEREVENT 0x10000 /* event request from userspace */ #define FBINFO_MISC_TILEBLITTING 0x20000 /* use tile blitting */ -#define FBINFO_MISC_FIRMWARE 0x40000 /* a replaceable firmware - inited framebuffer */ /* A driver may set this flag to indicate that it does want a set_par to be * called every time when fbcon_switch is executed. The advantage is that with @@ -801,6 +812,8 @@ struct fb_tile_ops { */ #define FBINFO_MISC_ALWAYS_SETPAR 0x40000 +/* where the fb is a firmware driver, and can be replaced with a proper one */ +#define FBINFO_MISC_FIRMWARE 0x80000 /* * Host and GPU endianness differ. */ @@ -873,6 +886,8 @@ struct fb_info { static inline struct apertures_struct *alloc_apertures(unsigned int max_num) { struct apertures_struct *a = kzalloc(sizeof(struct apertures_struct) + max_num * sizeof(struct aperture), GFP_KERNEL); + if (!a) + return NULL; a->count = max_num; return a; } |