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