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