drivers/staging/udlfb/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 urb *urb;
  23 };
  24
  25 struct urb_list {
  26         struct list_head list;
  27         spinlock_t lock;
  28         struct semaphore limit_sem;
  29         int available;
  30         int count;
  31         size_t size;
  32 };
  33
  34 struct dlfb_data {
  35         struct usb_device *udev;
  36         struct device *gdev; /* &udev->dev */
  37         struct fb_info *info;
  38         struct urb_list urbs;
  39         struct kref kref;
  40         char *backing_buffer;
  41         int fb_count;
  42         bool virtualized; /* true when physical usb device not present */
  43         struct delayed_work free_framebuffer_work;
  44         atomic_t usb_active; /* 0 = update virtual buffer, but no usb traffic */
  45         atomic_t lost_pixels; /* 1 = a render op failed. Need screen refresh */
  46         char *edid; /* null until we read edid from hw or get from sysfs */
  47         size_t edid_size;
  48         int sku_pixel_limit;
  49         int base16;
  50         int base8;
  51         u32 pseudo_palette[256];
  52         /* blit-only rendering path metrics, exposed through sysfs */
  53         atomic_t bytes_rendered; /* raw pixel-bytes driver asked to render */
  54         atomic_t bytes_identical; /* saved effort with backbuffer comparison */
  55         atomic_t bytes_sent; /* to usb, after compression including overhead */
  56         atomic_t cpu_kcycles_used; /* transpired during pixel processing */
  57 };
  58
  59 #define NR_USB_REQUEST_I2C_SUB_IO 0x02
  60 #define NR_USB_REQUEST_CHANNEL 0x12
  61
  62 /* -BULK_SIZE as per usb-skeleton. Can we get full page and avoid overhead? */
  63 #define BULK_SIZE 512
  64 #define MAX_TRANSFER (PAGE_SIZE*16 - BULK_SIZE)
  65 #define WRITES_IN_FLIGHT (4)
  66
  67 #define MIN_EDID_SIZE 128
  68 #define MAX_EDID_SIZE 128
  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 /* remove these once align.h patch is taken into kernel */
  91 #define DL_ALIGN_UP(x, a) ALIGN(x, a)
  92 #define DL_ALIGN_DOWN(x, a) ALIGN(x-(a-1), a)
  93
  94 /* remove once this gets added to sysfs.h */
  95 #define __ATTR_RW(attr) __ATTR(attr, 0644, attr##_show, attr##_store)
  96
  97 /*
  98  * udlfb is both a usb device, and a framebuffer device.
  99  * They may exist at the same time, but during various stages
 100  * inactivity, teardown, or "virtual" operation, only one or the
 101  * other will exist (one will outlive the other).  So we can't
 102  * call the dev_*() macros, because we don't have a stable dev object.
 103  */
 104 #define dl_err(format, arg...) \
 105         pr_err("udlfb: " format, ## arg)
 106 #define dl_warn(format, arg...) \
 107         pr_warning("udlfb: " format, ## arg)
 108 #define dl_notice(format, arg...) \
 109         pr_notice("udlfb: " format, ## arg)
 110 #define dl_info(format, arg...) \
 111         pr_info("udlfb: " format, ## arg)
 112
 113 #endif