tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 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 /* blit-only rendering path metrics, exposed through sysfs */
54 atomic_t bytes_rendered; /* raw pixel-bytes driver asked to render */
55 atomic_t bytes_identical; /* saved effort with backbuffer comparison */
56 atomic_t bytes_sent; /* to usb, after compression including overhead */
57 atomic_t cpu_kcycles_used; /* transpired during pixel processing */
58};
59
60#define NR_USB_REQUEST_I2C_SUB_IO 0x02
61#define NR_USB_REQUEST_CHANNEL 0x12
62
63/* -BULK_SIZE as per usb-skeleton. Can we get full page and avoid overhead? */
64#define BULK_SIZE 512
65#define MAX_TRANSFER (PAGE_SIZE*16 - BULK_SIZE)
66#define WRITES_IN_FLIGHT (4)
67
68#define MAX_VENDOR_DESCRIPTOR_SIZE 256
69
70#define GET_URB_TIMEOUT HZ
71#define FREE_URB_TIMEOUT (HZ*2)
72
73#define BPP 2
74#define MAX_CMD_PIXELS 255
75
76#define RLX_HEADER_BYTES 7
77#define MIN_RLX_PIX_BYTES 4
78#define MIN_RLX_CMD_BYTES (RLX_HEADER_BYTES + MIN_RLX_PIX_BYTES)
79
80#define RLE_HEADER_BYTES 6
81#define MIN_RLE_PIX_BYTES 3
82#define MIN_RLE_CMD_BYTES (RLE_HEADER_BYTES + MIN_RLE_PIX_BYTES)
83
84#define RAW_HEADER_BYTES 6
85#define MIN_RAW_PIX_BYTES 2
86#define MIN_RAW_CMD_BYTES (RAW_HEADER_BYTES + MIN_RAW_PIX_BYTES)
87
88#define DL_DEFIO_WRITE_DELAY 5 /* fb_deferred_io.delay in jiffies */
89#define DL_DEFIO_WRITE_DISABLE (HZ*60) /* "disable" with long delay */
90
91/* remove these once align.h patch is taken into kernel */
92#define DL_ALIGN_UP(x, a) ALIGN(x, a)
93#define DL_ALIGN_DOWN(x, a) ALIGN(x-(a-1), a)
94
95#endif