1 /* SPDX-License-Identifier: GPL-2.0 */
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
21 struct list_head entry;
22 struct dlfb_data *dlfb;
27 struct list_head list;
29 struct semaphore limit_sem;
36 struct usb_device *udev;
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 */
49 u32 pseudo_palette[256];
50 int blank_mode; /*one of FB_BLANK_ */
55 spinlock_t damage_lock;
56 struct work_struct damage_work;
58 /* blit-only rendering path metrics, exposed through sysfs */
59 atomic_t bytes_rendered; /* raw pixel-bytes driver asked to render */
60 atomic_t bytes_identical; /* saved effort with backbuffer comparison */
61 atomic_t bytes_sent; /* to usb, after compression including overhead */
62 atomic_t cpu_kcycles_used; /* transpired during pixel processing */
63 struct fb_var_screeninfo current_mode;
64 struct list_head deferred_free;
67 #define NR_USB_REQUEST_I2C_SUB_IO 0x02
68 #define NR_USB_REQUEST_CHANNEL 0x12
70 /* -BULK_SIZE as per usb-skeleton. Can we get full page and avoid overhead? */
72 #define MAX_TRANSFER (PAGE_SIZE*16 - BULK_SIZE)
73 #define WRITES_IN_FLIGHT (4)
75 #define MAX_VENDOR_DESCRIPTOR_SIZE 256
77 #define GET_URB_TIMEOUT HZ
78 #define FREE_URB_TIMEOUT (HZ*2)
81 #define MAX_CMD_PIXELS 255
83 #define RLX_HEADER_BYTES 7
84 #define MIN_RLX_PIX_BYTES 4
85 #define MIN_RLX_CMD_BYTES (RLX_HEADER_BYTES + MIN_RLX_PIX_BYTES)
87 #define RLE_HEADER_BYTES 6
88 #define MIN_RLE_PIX_BYTES 3
89 #define MIN_RLE_CMD_BYTES (RLE_HEADER_BYTES + MIN_RLE_PIX_BYTES)
91 #define RAW_HEADER_BYTES 6
92 #define MIN_RAW_PIX_BYTES 2
93 #define MIN_RAW_CMD_BYTES (RAW_HEADER_BYTES + MIN_RAW_PIX_BYTES)
95 #define DL_DEFIO_WRITE_DELAY msecs_to_jiffies(HZ <= 300 ? 4 : 10) /* optimal value for 720p video */
96 #define DL_DEFIO_WRITE_DISABLE (HZ*60) /* "disable" with long delay */
98 /* remove these once align.h patch is taken into kernel */
99 #define DL_ALIGN_UP(x, a) ALIGN(x, a)
100 #define DL_ALIGN_DOWN(x, a) ALIGN_DOWN(x, a)