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TOMOYO Linux Cross Reference
Linux/include/video/udlfb.h

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  1 /* SPDX-License-Identifier: GPL-2.0 */
  2 #ifndef UDLFB_H
  3 #define UDLFB_H
  4 
  5 /*
  6  * TODO: Propose standard fb.h ioctl for reporting damage,
  7  * using _IOWR() and one of the existing area structs from fb.h
  8  * Consider these ioctls deprecated, but they're still used by the
  9  * DisplayLink X server as yet - need both to be modified in tandem
 10  * when new ioctl(s) are ready.
 11  */
 12 #define DLFB_IOCTL_RETURN_EDID   0xAD
 13 #define DLFB_IOCTL_REPORT_DAMAGE 0xAA
 14 struct dloarea {
 15         int x, y;
 16         int w, h;
 17         int x2, y2;
 18 };
 19 
 20 struct urb_node {
 21         struct list_head entry;
 22         struct dlfb_data *dlfb;
 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 fb_info *info;
 38         struct urb_list urbs;
 39         char *backing_buffer;
 40         int fb_count;
 41         bool virtualized; /* true when physical usb device not present */
 42         atomic_t usb_active; /* 0 = update virtual buffer, but no usb traffic */
 43         atomic_t lost_pixels; /* 1 = a render op failed. Need screen refresh */
 44         char *edid; /* null until we read edid from hw or get from sysfs */
 45         size_t edid_size;
 46         int sku_pixel_limit;
 47         int base16;
 48         int base8;
 49         u32 pseudo_palette[256];
 50         int blank_mode; /*one of FB_BLANK_ */
 51         struct mutex render_mutex;
 52         int damage_x;
 53         int damage_y;
 54         int damage_x2;
 55         int damage_y2;
 56         spinlock_t damage_lock;
 57         struct work_struct damage_work;
 58         struct fb_ops ops;
 59         /* blit-only rendering path metrics, exposed through sysfs */
 60         atomic_t bytes_rendered; /* raw pixel-bytes driver asked to render */
 61         atomic_t bytes_identical; /* saved effort with backbuffer comparison */
 62         atomic_t bytes_sent; /* to usb, after compression including overhead */
 63         atomic_t cpu_kcycles_used; /* transpired during pixel processing */
 64         struct fb_var_screeninfo current_mode;
 65         struct list_head deferred_free;
 66 };
 67 
 68 #define NR_USB_REQUEST_I2C_SUB_IO 0x02
 69 #define NR_USB_REQUEST_CHANNEL 0x12
 70 
 71 /* -BULK_SIZE as per usb-skeleton. Can we get full page and avoid overhead? */
 72 #define BULK_SIZE 512
 73 #define MAX_TRANSFER (PAGE_SIZE*16 - BULK_SIZE)
 74 #define WRITES_IN_FLIGHT (4)
 75 
 76 #define MAX_VENDOR_DESCRIPTOR_SIZE 256
 77 
 78 #define GET_URB_TIMEOUT HZ
 79 #define FREE_URB_TIMEOUT (HZ*2)
 80 
 81 #define BPP                     2
 82 #define MAX_CMD_PIXELS          255
 83 
 84 #define RLX_HEADER_BYTES        7
 85 #define MIN_RLX_PIX_BYTES       4
 86 #define MIN_RLX_CMD_BYTES       (RLX_HEADER_BYTES + MIN_RLX_PIX_BYTES)
 87 
 88 #define RLE_HEADER_BYTES        6
 89 #define MIN_RLE_PIX_BYTES       3
 90 #define MIN_RLE_CMD_BYTES       (RLE_HEADER_BYTES + MIN_RLE_PIX_BYTES)
 91 
 92 #define RAW_HEADER_BYTES        6
 93 #define MIN_RAW_PIX_BYTES       2
 94 #define MIN_RAW_CMD_BYTES       (RAW_HEADER_BYTES + MIN_RAW_PIX_BYTES)
 95 
 96 #define DL_DEFIO_WRITE_DELAY    msecs_to_jiffies(HZ <= 300 ? 4 : 10) /* optimal value for 720p video */
 97 #define DL_DEFIO_WRITE_DISABLE  (HZ*60) /* "disable" with long delay */
 98 
 99 /* remove these once align.h patch is taken into kernel */
100 #define DL_ALIGN_UP(x, a) ALIGN(x, a)
101 #define DL_ALIGN_DOWN(x, a) ALIGN_DOWN(x, a)
102 
103 #endif
104 

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