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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
14struct dloarea {
15 int x, y;
16 int w, h;
17 int x2, y2;
18};
19
20struct urb_node {
21 struct list_head entry;
22 struct dlfb_data *dlfb;
23 struct delayed_work release_urb_work;
24 struct urb *urb;
25};
26
27struct urb_list {
28 struct list_head list;
29 spinlock_t lock;
30 struct semaphore limit_sem;
31 int available;
32 int count;
33 size_t size;
34};
35
36struct dlfb_data {
37 struct usb_device *udev;
38 struct fb_info *info;
39 struct urb_list urbs;
40 struct kref kref;
41 char *backing_buffer;
42 int fb_count;
43 bool virtualized; /* true when physical usb device not present */
44 struct delayed_work init_framebuffer_work;
45 struct delayed_work free_framebuffer_work;
46 atomic_t usb_active; /* 0 = update virtual buffer, but no usb traffic */
47 atomic_t lost_pixels; /* 1 = a render op failed. Need screen refresh */
48 char *edid; /* null until we read edid from hw or get from sysfs */
49 size_t edid_size;
50 int sku_pixel_limit;
51 int base16;
52 int base8;
53 u32 pseudo_palette[256];
54 int blank_mode; /*one of FB_BLANK_ */
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};
61
62#define NR_USB_REQUEST_I2C_SUB_IO 0x02
63#define NR_USB_REQUEST_CHANNEL 0x12
64
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
70#define MAX_VENDOR_DESCRIPTOR_SIZE 256
71
72#define GET_URB_TIMEOUT HZ
73#define FREE_URB_TIMEOUT (HZ*2)
74
75#define BPP 2
76#define MAX_CMD_PIXELS 255
77
78#define RLX_HEADER_BYTES 7
79#define MIN_RLX_PIX_BYTES 4
80#define MIN_RLX_CMD_BYTES (RLX_HEADER_BYTES + MIN_RLX_PIX_BYTES)
81
82#define RLE_HEADER_BYTES 6
83#define MIN_RLE_PIX_BYTES 3
84#define MIN_RLE_CMD_BYTES (RLE_HEADER_BYTES + MIN_RLE_PIX_BYTES)
85
86#define RAW_HEADER_BYTES 6
87#define MIN_RAW_PIX_BYTES 2
88#define MIN_RAW_CMD_BYTES (RAW_HEADER_BYTES + MIN_RAW_PIX_BYTES)
89
90#define DL_DEFIO_WRITE_DELAY 5 /* fb_deferred_io.delay in jiffies */
91#define DL_DEFIO_WRITE_DISABLE (HZ*60) /* "disable" with long delay */
92
93/* remove these once align.h patch is taken into kernel */
94#define DL_ALIGN_UP(x, a) ALIGN(x, a)
95#define DL_ALIGN_DOWN(x, a) ALIGN_DOWN(x, a)
96
97#endif