On 2/20/07, Geert Uytterhoeven [off-list ref] wrote:

Don't you need a way to specify the maximum deferral time? E.g. a field in
fb_info.

You are right. I will need that. I could put that into struct
fb_deferred_io. So drivers would setup like:

static struct fb_deferred_io hecubafb_defio = {
        .delay          = HZ,
        .deferred_io    = hecubafb_dpy_update,
};

where that would be:
struct fb_deferred_io {
        unsigned long delay;    /* delay between mkwrite and deferred handler */
        struct mutex lock;      /* mutex that protects the page list */
        struct list_head pagelist;      /* list of touched pages */
        struct delayed_work deferred_work;
        void (*deferred_io)(struct fb_info *info, struct list_head
*pagelist); /* callback */
};

and the driver would do:
...
info->fbdefio = hecubafb_defio;
register_framebuffer...

When the driver calls register_framebuffer and unregister_framebuffer,
I can then do the init and destruction of the other members of that
struct. Does this sound okay?

Thanks,
jaya