x86/speculation/mds: Fix documentation typo
[linux/fpc-iii.git] / include / video / udlfb.h
blob85e32ee739fc34521de2a27954b021ee4cfd389c
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef UDLFB_H
3 #define UDLFB_H
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.
12 #define DLFB_IOCTL_RETURN_EDID 0xAD
13 #define DLFB_IOCTL_REPORT_DAMAGE 0xAA
14 struct dloarea {
15 int x, y;
16 int w, h;
17 int x2, y2;
20 struct urb_node {
21 struct list_head entry;
22 struct dlfb_data *dev;
23 struct delayed_work release_urb_work;
24 struct urb *urb;
27 struct 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;
36 struct dlfb_data {
37 struct usb_device *udev;
38 struct device *gdev; /* &udev->dev */
39 struct fb_info *info;
40 struct urb_list urbs;
41 struct kref kref;
42 char *backing_buffer;
43 int fb_count;
44 bool virtualized; /* true when physical usb device not present */
45 struct delayed_work init_framebuffer_work;
46 struct delayed_work free_framebuffer_work;
47 atomic_t usb_active; /* 0 = update virtual buffer, but no usb traffic */
48 atomic_t lost_pixels; /* 1 = a render op failed. Need screen refresh */
49 char *edid; /* null until we read edid from hw or get from sysfs */
50 size_t edid_size;
51 int sku_pixel_limit;
52 int base16;
53 int base8;
54 u32 pseudo_palette[256];
55 int blank_mode; /*one of FB_BLANK_ */
56 /* blit-only rendering path metrics, exposed through sysfs */
57 atomic_t bytes_rendered; /* raw pixel-bytes driver asked to render */
58 atomic_t bytes_identical; /* saved effort with backbuffer comparison */
59 atomic_t bytes_sent; /* to usb, after compression including overhead */
60 atomic_t cpu_kcycles_used; /* transpired during pixel processing */
63 #define NR_USB_REQUEST_I2C_SUB_IO 0x02
64 #define NR_USB_REQUEST_CHANNEL 0x12
66 /* -BULK_SIZE as per usb-skeleton. Can we get full page and avoid overhead? */
67 #define BULK_SIZE 512
68 #define MAX_TRANSFER (PAGE_SIZE*16 - BULK_SIZE)
69 #define WRITES_IN_FLIGHT (4)
71 #define MAX_VENDOR_DESCRIPTOR_SIZE 256
73 #define GET_URB_TIMEOUT HZ
74 #define FREE_URB_TIMEOUT (HZ*2)
76 #define BPP 2
77 #define MAX_CMD_PIXELS 255
79 #define RLX_HEADER_BYTES 7
80 #define MIN_RLX_PIX_BYTES 4
81 #define MIN_RLX_CMD_BYTES (RLX_HEADER_BYTES + MIN_RLX_PIX_BYTES)
83 #define RLE_HEADER_BYTES 6
84 #define MIN_RLE_PIX_BYTES 3
85 #define MIN_RLE_CMD_BYTES (RLE_HEADER_BYTES + MIN_RLE_PIX_BYTES)
87 #define RAW_HEADER_BYTES 6
88 #define MIN_RAW_PIX_BYTES 2
89 #define MIN_RAW_CMD_BYTES (RAW_HEADER_BYTES + MIN_RAW_PIX_BYTES)
91 #define DL_DEFIO_WRITE_DELAY msecs_to_jiffies(HZ <= 300 ? 4 : 10) /* optimal value for 720p video */
92 #define DL_DEFIO_WRITE_DISABLE (HZ*60) /* "disable" with long delay */
94 /* remove these once align.h patch is taken into kernel */
95 #define DL_ALIGN_UP(x, a) ALIGN(x, a)
96 #define DL_ALIGN_DOWN(x, a) ALIGN_DOWN(x, a)
98 #endif