/* * TODO: Propose standard fb.h ioctl for reporting damage, * using _IOWR() and one of the existing area structs from fb.h * Consider these ioctls deprecated, but they're still used by the * DisplayLink X server as yet - need both to be modified in tandem * when new ioctl(s) are ready.
*/ #define DLFB_IOCTL_RETURN_EDID 0xAD #define DLFB_IOCTL_REPORT_DAMAGE 0xAA struct dloarea { int x, y; int w, h; int x2, y2;
};
struct urb_list { struct list_head list;
spinlock_t lock; struct semaphore limit_sem; int available; int count;
size_t size;
};
struct dlfb_data { struct usb_device *udev; struct fb_info *info; struct urb_list urbs; char *backing_buffer; int fb_count; bool virtualized; /* true when physical usb device not present */
atomic_t usb_active; /* 0 = update virtual buffer, but no usb traffic */
atomic_t lost_pixels; /* 1 = a render op failed. Need screen refresh */ char *edid; /* null until we read edid from hw or get from sysfs */
size_t edid_size; int sku_pixel_limit; int base16; int base8;
u32 pseudo_palette[256]; int blank_mode; /*one of FB_BLANK_ */ struct mutex render_mutex; int damage_x; int damage_y; int damage_x2; int damage_y2;
spinlock_t damage_lock; struct work_struct damage_work; struct fb_ops ops; /* blit-only rendering path metrics, exposed through sysfs */
atomic_t bytes_rendered; /* raw pixel-bytes driver asked to render */
atomic_t bytes_identical; /* saved effort with backbuffer comparison */
atomic_t bytes_sent; /* to usb, after compression including overhead */
atomic_t cpu_kcycles_used; /* transpired during pixel processing */ struct fb_var_screeninfo current_mode; struct list_head deferred_free;
};
/* -BULK_SIZE as per usb-skeleton. Can we get full page and avoid overhead? */ #define BULK_SIZE 512 #define MAX_TRANSFER (PAGE_SIZE*16 - BULK_SIZE) #define WRITES_IN_FLIGHT (4)
#define DL_DEFIO_WRITE_DELAY msecs_to_jiffies(HZ <= 300 ? 4 : 10) /* optimal value for 720p video */ #define DL_DEFIO_WRITE_DISABLE (HZ*60) /* "disable" with long delay */
/* remove these once align.h patch is taken into kernel */ #define DL_ALIGN_UP(x, a) ALIGN(x, a) #define DL_ALIGN_DOWN(x, a) ALIGN_DOWN(x, a)
#endif
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