1#ifndef UDLFB_H
2#define UDLFB_H
3
4/*
5 * TODO: Propose standard fb.h ioctl for reporting damage,
6 * using _IOWR() and one of the existing area structs from fb.h
7 * Consider these ioctls deprecated, but they're still used by the
8 * DisplayLink X server as yet - need both to be modified in tandem
9 * when new ioctl(s) are ready.
10 */
11#define DLFB_IOCTL_RETURN_EDID	 0xAD
12#define DLFB_IOCTL_REPORT_DAMAGE 0xAA
13struct dloarea {
14	int x, y;
15	int w, h;
16	int x2, y2;
17};
18
19struct urb_node {
20	struct list_head entry;
21	struct dlfb_data *dev;
22	struct delayed_work release_urb_work;
23	struct urb *urb;
24};
25
26struct 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
35struct dlfb_data {
36	struct usb_device *udev;
37	struct device *gdev; /* &udev->dev */
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(x-(a-1), a)
96
97#endif
98