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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 | /* SPDX-License-Identifier: GPL-2.0 */ #ifndef UDLFB_H #define UDLFB_H /* * TODO: Propose standard fb.h ioctl for reporting damage, * using _IOWR() and one of the existing area structs from fb.h * Consider these ioctls deprecated, but they're still used by the * DisplayLink X server as yet - need both to be modified in tandem * when new ioctl(s) are ready. */ #define DLFB_IOCTL_RETURN_EDID 0xAD #define DLFB_IOCTL_REPORT_DAMAGE 0xAA struct dloarea { int x, y; int w, h; int x2, y2; }; struct urb_node { struct list_head entry; struct dlfb_data *dlfb; struct urb *urb; }; struct urb_list { struct list_head list; spinlock_t lock; struct semaphore limit_sem; int available; int count; size_t size; }; struct dlfb_data { struct usb_device *udev; struct fb_info *info; struct urb_list urbs; char *backing_buffer; int fb_count; bool virtualized; /* true when physical usb device not present */ atomic_t usb_active; /* 0 = update virtual buffer, but no usb traffic */ atomic_t lost_pixels; /* 1 = a render op failed. Need screen refresh */ char *edid; /* null until we read edid from hw or get from sysfs */ size_t edid_size; int sku_pixel_limit; int base16; int base8; u32 pseudo_palette[256]; int blank_mode; /*one of FB_BLANK_ */ struct mutex render_mutex; int damage_x; int damage_y; int damage_x2; int damage_y2; spinlock_t damage_lock; struct work_struct damage_work; struct fb_ops ops; /* blit-only rendering path metrics, exposed through sysfs */ atomic_t bytes_rendered; /* raw pixel-bytes driver asked to render */ atomic_t bytes_identical; /* saved effort with backbuffer comparison */ atomic_t bytes_sent; /* to usb, after compression including overhead */ atomic_t cpu_kcycles_used; /* transpired during pixel processing */ struct fb_var_screeninfo current_mode; struct list_head deferred_free; }; #define NR_USB_REQUEST_I2C_SUB_IO 0x02 #define NR_USB_REQUEST_CHANNEL 0x12 /* -BULK_SIZE as per usb-skeleton. Can we get full page and avoid overhead? */ #define BULK_SIZE 512 #define MAX_TRANSFER (PAGE_SIZE*16 - BULK_SIZE) #define WRITES_IN_FLIGHT (4) #define MAX_VENDOR_DESCRIPTOR_SIZE 256 #define GET_URB_TIMEOUT HZ #define FREE_URB_TIMEOUT (HZ*2) #define BPP 2 #define MAX_CMD_PIXELS 255 #define RLX_HEADER_BYTES 7 #define MIN_RLX_PIX_BYTES 4 #define MIN_RLX_CMD_BYTES (RLX_HEADER_BYTES + MIN_RLX_PIX_BYTES) #define RLE_HEADER_BYTES 6 #define MIN_RLE_PIX_BYTES 3 #define MIN_RLE_CMD_BYTES (RLE_HEADER_BYTES + MIN_RLE_PIX_BYTES) #define RAW_HEADER_BYTES 6 #define MIN_RAW_PIX_BYTES 2 #define MIN_RAW_CMD_BYTES (RAW_HEADER_BYTES + MIN_RAW_PIX_BYTES) #define DL_DEFIO_WRITE_DELAY msecs_to_jiffies(HZ <= 300 ? 4 : 10) /* optimal value for 720p video */ #define DL_DEFIO_WRITE_DISABLE (HZ*60) /* "disable" with long delay */ /* remove these once align.h patch is taken into kernel */ #define DL_ALIGN_UP(x, a) ALIGN(x, a) #define DL_ALIGN_DOWN(x, a) ALIGN_DOWN(x, a) #endif |