include/video/udlfb.h

   1 #ifndef UDLFB_H
   2 #define UDLFB_H
   3
   4 /*
   5  * TODO: Propose standard fb.h ioctl for reporting damage,
   6  * using _IOWR() and one of the existing area structs from fb.h
   7  * Consider these ioctls deprecated, but they're still used by the
   8  * DisplayLink X server as yet - need both to be modified in tandem
   9  * when new ioctl(s) are ready.
  10  */
  11 #define DLFB_IOCTL_RETURN_EDID   0xAD
  12 #define DLFB_IOCTL_REPORT_DAMAGE 0xAA
  13 struct dloarea {
  14         int x, y;
  15         int w, h;
  16         int x2, y2;
  17 };
  18
  19 struct urb_node {
  20         struct list_head entry;
  21         struct dlfb_data *dev;
  22         struct delayed_work release_urb_work;
  23         struct urb *urb;
  24 };
  25
  26 struct urb_list {
  27         struct list_head list;
  28         spinlock_t lock;
  29         struct semaphore limit_sem;
  30         int available;
  31         int count;
  32         size_t size;
  33 };
  34
  35 struct dlfb_data {
  36         struct usb_device *udev;
  37         struct device *gdev; /* &udev->dev */
  38         struct fb_info *info;
  39         struct urb_list urbs;
  40         struct kref kref;
  41         char *backing_buffer;
  42         int fb_count;
  43         bool virtualized; /* true when physical usb device not present */
  44         struct delayed_work init_framebuffer_work;
  45         struct delayed_work free_framebuffer_work;
  46         atomic_t usb_active; /* 0 = update virtual buffer, but no usb traffic */
  47         atomic_t lost_pixels; /* 1 = a render op failed. Need screen refresh */
  48         char *edid; /* null until we read edid from hw or get from sysfs */
  49         size_t edid_size;
  50         int sku_pixel_limit;
  51         int base16;
  52         int base8;
  53         u32 pseudo_palette[256];
  54         int blank_mode; /*one of FB_BLANK_ */
  55         /* blit-only rendering path metrics, exposed through sysfs */
  56         atomic_t bytes_rendered; /* raw pixel-bytes driver asked to render */
  57         atomic_t bytes_identical; /* saved effort with backbuffer comparison */
  58         atomic_t bytes_sent; /* to usb, after compression including overhead */
  59         atomic_t cpu_kcycles_used; /* transpired during pixel processing */
  60 };
  61
  62 #define NR_USB_REQUEST_I2C_SUB_IO 0x02
  63 #define NR_USB_REQUEST_CHANNEL 0x12
  64
  65 /* -BULK_SIZE as per usb-skeleton. Can we get full page and avoid overhead? */
  66 #define BULK_SIZE 512
  67 #define MAX_TRANSFER (PAGE_SIZE*16 - BULK_SIZE)
  68 #define WRITES_IN_FLIGHT (4)
  69
  70 #define MAX_VENDOR_DESCRIPTOR_SIZE 256
  71
  72 #define GET_URB_TIMEOUT HZ
  73 #define FREE_URB_TIMEOUT (HZ*2)
  74
  75 #define BPP                     2
  76 #define MAX_CMD_PIXELS          255
  77
  78 #define RLX_HEADER_BYTES        7
  79 #define MIN_RLX_PIX_BYTES       4
  80 #define MIN_RLX_CMD_BYTES       (RLX_HEADER_BYTES + MIN_RLX_PIX_BYTES)
  81
  82 #define RLE_HEADER_BYTES        6
  83 #define MIN_RLE_PIX_BYTES       3
  84 #define MIN_RLE_CMD_BYTES       (RLE_HEADER_BYTES + MIN_RLE_PIX_BYTES)
  85
  86 #define RAW_HEADER_BYTES        6
  87 #define MIN_RAW_PIX_BYTES       2
  88 #define MIN_RAW_CMD_BYTES       (RAW_HEADER_BYTES + MIN_RAW_PIX_BYTES)
  89
  90 #define DL_DEFIO_WRITE_DELAY    5 /* fb_deferred_io.delay in jiffies */
  91 #define DL_DEFIO_WRITE_DISABLE  (HZ*60) /* "disable" with long delay */
  92
  93 /* remove these once align.h patch is taken into kernel */
  94 #define DL_ALIGN_UP(x, a) ALIGN(x, a)
  95 #define DL_ALIGN_DOWN(x, a) ALIGN(x-(a-1), a)
  96
  97 #endif