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 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 init_framebuffer_work; 44 struct delayed_work free_framebuffer_work; 45 atomic_t usb_active; /* 0 = update virtual buffer, but no usb traffic */ 46 atomic_t lost_pixels; /* 1 = a render op failed. Need screen refresh */ 47 char *edid; /* null until we read edid from hw or get from sysfs */ 48 size_t edid_size; 49 int sku_pixel_limit; 50 int base16; 51 int base8; 52 u32 pseudo_palette[256]; 53 int blank_mode; /*one of FB_BLANK_ */ 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 64 #define NR_USB_REQUEST_I2C_SUB_IO 0x02 65 #define NR_USB_REQUEST_CHANNEL 0x12 66 67 /* -BULK_SIZE as per usb-skeleton. Can we get full page and avoid overhead? */ 68 #define BULK_SIZE 512 69 #define MAX_TRANSFER (PAGE_SIZE*16 - BULK_SIZE) 70 #define WRITES_IN_FLIGHT (4) 71 72 #define MAX_VENDOR_DESCRIPTOR_SIZE 256 73 74 #define GET_URB_TIMEOUT HZ 75 #define FREE_URB_TIMEOUT (HZ*2) 76 77 #define BPP 2 78 #define MAX_CMD_PIXELS 255 79 80 #define RLX_HEADER_BYTES 7 81 #define MIN_RLX_PIX_BYTES 4 82 #define MIN_RLX_CMD_BYTES (RLX_HEADER_BYTES + MIN_RLX_PIX_BYTES) 83 84 #define RLE_HEADER_BYTES 6 85 #define MIN_RLE_PIX_BYTES 3 86 #define MIN_RLE_CMD_BYTES (RLE_HEADER_BYTES + MIN_RLE_PIX_BYTES) 87 88 #define RAW_HEADER_BYTES 6 89 #define MIN_RAW_PIX_BYTES 2 90 #define MIN_RAW_CMD_BYTES (RAW_HEADER_BYTES + MIN_RAW_PIX_BYTES) 91 92 #define DL_DEFIO_WRITE_DELAY msecs_to_jiffies(HZ <= 300 ? 4 : 10) /* optimal value for 720p video */ 93 #define DL_DEFIO_WRITE_DISABLE (HZ*60) /* "disable" with long delay */ 94 95 /* remove these once align.h patch is taken into kernel */ 96 #define DL_ALIGN_UP(x, a) ALIGN(x, a) 97 #define DL_ALIGN_DOWN(x, a) ALIGN_DOWN(x, a) 98 99 #endif 100