1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun #ifndef UDLFB_H 3*4882a593Smuzhiyun #define UDLFB_H 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun /* 6*4882a593Smuzhiyun * TODO: Propose standard fb.h ioctl for reporting damage, 7*4882a593Smuzhiyun * using _IOWR() and one of the existing area structs from fb.h 8*4882a593Smuzhiyun * Consider these ioctls deprecated, but they're still used by the 9*4882a593Smuzhiyun * DisplayLink X server as yet - need both to be modified in tandem 10*4882a593Smuzhiyun * when new ioctl(s) are ready. 11*4882a593Smuzhiyun */ 12*4882a593Smuzhiyun #define DLFB_IOCTL_RETURN_EDID 0xAD 13*4882a593Smuzhiyun #define DLFB_IOCTL_REPORT_DAMAGE 0xAA 14*4882a593Smuzhiyun struct dloarea { 15*4882a593Smuzhiyun int x, y; 16*4882a593Smuzhiyun int w, h; 17*4882a593Smuzhiyun int x2, y2; 18*4882a593Smuzhiyun }; 19*4882a593Smuzhiyun 20*4882a593Smuzhiyun struct urb_node { 21*4882a593Smuzhiyun struct list_head entry; 22*4882a593Smuzhiyun struct dlfb_data *dlfb; 23*4882a593Smuzhiyun struct urb *urb; 24*4882a593Smuzhiyun }; 25*4882a593Smuzhiyun 26*4882a593Smuzhiyun struct urb_list { 27*4882a593Smuzhiyun struct list_head list; 28*4882a593Smuzhiyun spinlock_t lock; 29*4882a593Smuzhiyun struct semaphore limit_sem; 30*4882a593Smuzhiyun int available; 31*4882a593Smuzhiyun int count; 32*4882a593Smuzhiyun size_t size; 33*4882a593Smuzhiyun }; 34*4882a593Smuzhiyun 35*4882a593Smuzhiyun struct dlfb_data { 36*4882a593Smuzhiyun struct usb_device *udev; 37*4882a593Smuzhiyun struct fb_info *info; 38*4882a593Smuzhiyun struct urb_list urbs; 39*4882a593Smuzhiyun char *backing_buffer; 40*4882a593Smuzhiyun int fb_count; 41*4882a593Smuzhiyun bool virtualized; /* true when physical usb device not present */ 42*4882a593Smuzhiyun atomic_t usb_active; /* 0 = update virtual buffer, but no usb traffic */ 43*4882a593Smuzhiyun atomic_t lost_pixels; /* 1 = a render op failed. Need screen refresh */ 44*4882a593Smuzhiyun char *edid; /* null until we read edid from hw or get from sysfs */ 45*4882a593Smuzhiyun size_t edid_size; 46*4882a593Smuzhiyun int sku_pixel_limit; 47*4882a593Smuzhiyun int base16; 48*4882a593Smuzhiyun int base8; 49*4882a593Smuzhiyun u32 pseudo_palette[256]; 50*4882a593Smuzhiyun int blank_mode; /*one of FB_BLANK_ */ 51*4882a593Smuzhiyun struct mutex render_mutex; 52*4882a593Smuzhiyun int damage_x; 53*4882a593Smuzhiyun int damage_y; 54*4882a593Smuzhiyun int damage_x2; 55*4882a593Smuzhiyun int damage_y2; 56*4882a593Smuzhiyun spinlock_t damage_lock; 57*4882a593Smuzhiyun struct work_struct damage_work; 58*4882a593Smuzhiyun struct fb_ops ops; 59*4882a593Smuzhiyun /* blit-only rendering path metrics, exposed through sysfs */ 60*4882a593Smuzhiyun atomic_t bytes_rendered; /* raw pixel-bytes driver asked to render */ 61*4882a593Smuzhiyun atomic_t bytes_identical; /* saved effort with backbuffer comparison */ 62*4882a593Smuzhiyun atomic_t bytes_sent; /* to usb, after compression including overhead */ 63*4882a593Smuzhiyun atomic_t cpu_kcycles_used; /* transpired during pixel processing */ 64*4882a593Smuzhiyun struct fb_var_screeninfo current_mode; 65*4882a593Smuzhiyun struct list_head deferred_free; 66*4882a593Smuzhiyun }; 67*4882a593Smuzhiyun 68*4882a593Smuzhiyun #define NR_USB_REQUEST_I2C_SUB_IO 0x02 69*4882a593Smuzhiyun #define NR_USB_REQUEST_CHANNEL 0x12 70*4882a593Smuzhiyun 71*4882a593Smuzhiyun /* -BULK_SIZE as per usb-skeleton. Can we get full page and avoid overhead? */ 72*4882a593Smuzhiyun #define BULK_SIZE 512 73*4882a593Smuzhiyun #define MAX_TRANSFER (PAGE_SIZE*16 - BULK_SIZE) 74*4882a593Smuzhiyun #define WRITES_IN_FLIGHT (4) 75*4882a593Smuzhiyun 76*4882a593Smuzhiyun #define MAX_VENDOR_DESCRIPTOR_SIZE 256 77*4882a593Smuzhiyun 78*4882a593Smuzhiyun #define GET_URB_TIMEOUT HZ 79*4882a593Smuzhiyun #define FREE_URB_TIMEOUT (HZ*2) 80*4882a593Smuzhiyun 81*4882a593Smuzhiyun #define BPP 2 82*4882a593Smuzhiyun #define MAX_CMD_PIXELS 255 83*4882a593Smuzhiyun 84*4882a593Smuzhiyun #define RLX_HEADER_BYTES 7 85*4882a593Smuzhiyun #define MIN_RLX_PIX_BYTES 4 86*4882a593Smuzhiyun #define MIN_RLX_CMD_BYTES (RLX_HEADER_BYTES + MIN_RLX_PIX_BYTES) 87*4882a593Smuzhiyun 88*4882a593Smuzhiyun #define RLE_HEADER_BYTES 6 89*4882a593Smuzhiyun #define MIN_RLE_PIX_BYTES 3 90*4882a593Smuzhiyun #define MIN_RLE_CMD_BYTES (RLE_HEADER_BYTES + MIN_RLE_PIX_BYTES) 91*4882a593Smuzhiyun 92*4882a593Smuzhiyun #define RAW_HEADER_BYTES 6 93*4882a593Smuzhiyun #define MIN_RAW_PIX_BYTES 2 94*4882a593Smuzhiyun #define MIN_RAW_CMD_BYTES (RAW_HEADER_BYTES + MIN_RAW_PIX_BYTES) 95*4882a593Smuzhiyun 96*4882a593Smuzhiyun #define DL_DEFIO_WRITE_DELAY msecs_to_jiffies(HZ <= 300 ? 4 : 10) /* optimal value for 720p video */ 97*4882a593Smuzhiyun #define DL_DEFIO_WRITE_DISABLE (HZ*60) /* "disable" with long delay */ 98*4882a593Smuzhiyun 99*4882a593Smuzhiyun /* remove these once align.h patch is taken into kernel */ 100*4882a593Smuzhiyun #define DL_ALIGN_UP(x, a) ALIGN(x, a) 101*4882a593Smuzhiyun #define DL_ALIGN_DOWN(x, a) ALIGN_DOWN(x, a) 102*4882a593Smuzhiyun 103*4882a593Smuzhiyun #endif 104