udlfb.h 2.9 KB

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  1. /* SPDX-License-Identifier: GPL-2.0 */
  2. #ifndef UDLFB_H
  3. #define UDLFB_H
  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. struct urb_node {
  19. struct list_head entry;
  20. struct dlfb_data *dlfb;
  21. struct urb *urb;
  22. };
  23. struct urb_list {
  24. struct list_head list;
  25. spinlock_t lock;
  26. struct semaphore limit_sem;
  27. int available;
  28. int count;
  29. size_t size;
  30. };
  31. struct dlfb_data {
  32. struct usb_device *udev;
  33. struct fb_info *info;
  34. struct urb_list urbs;
  35. char *backing_buffer;
  36. int fb_count;
  37. bool virtualized; /* true when physical usb device not present */
  38. atomic_t usb_active; /* 0 = update virtual buffer, but no usb traffic */
  39. atomic_t lost_pixels; /* 1 = a render op failed. Need screen refresh */
  40. char *edid; /* null until we read edid from hw or get from sysfs */
  41. size_t edid_size;
  42. int sku_pixel_limit;
  43. int base16;
  44. int base8;
  45. u32 pseudo_palette[256];
  46. int blank_mode; /*one of FB_BLANK_ */
  47. struct mutex render_mutex;
  48. int damage_x;
  49. int damage_y;
  50. int damage_x2;
  51. int damage_y2;
  52. spinlock_t damage_lock;
  53. struct work_struct damage_work;
  54. struct fb_ops ops;
  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. struct fb_var_screeninfo current_mode;
  61. struct list_head deferred_free;
  62. };
  63. #define NR_USB_REQUEST_I2C_SUB_IO 0x02
  64. #define NR_USB_REQUEST_CHANNEL 0x12
  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. #define MAX_VENDOR_DESCRIPTOR_SIZE 256
  70. #define GET_URB_TIMEOUT HZ
  71. #define FREE_URB_TIMEOUT (HZ*2)
  72. #define BPP 2
  73. #define MAX_CMD_PIXELS 255
  74. #define RLX_HEADER_BYTES 7
  75. #define MIN_RLX_PIX_BYTES 4
  76. #define MIN_RLX_CMD_BYTES (RLX_HEADER_BYTES + MIN_RLX_PIX_BYTES)
  77. #define RLE_HEADER_BYTES 6
  78. #define MIN_RLE_PIX_BYTES 3
  79. #define MIN_RLE_CMD_BYTES (RLE_HEADER_BYTES + MIN_RLE_PIX_BYTES)
  80. #define RAW_HEADER_BYTES 6
  81. #define MIN_RAW_PIX_BYTES 2
  82. #define MIN_RAW_CMD_BYTES (RAW_HEADER_BYTES + MIN_RAW_PIX_BYTES)
  83. #define DL_DEFIO_WRITE_DELAY msecs_to_jiffies(HZ <= 300 ? 4 : 10) /* optimal value for 720p video */
  84. #define DL_DEFIO_WRITE_DISABLE (HZ*60) /* "disable" with long delay */
  85. /* remove these once align.h patch is taken into kernel */
  86. #define DL_ALIGN_UP(x, a) ALIGN(x, a)
  87. #define DL_ALIGN_DOWN(x, a) ALIGN_DOWN(x, a)
  88. #endif