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.
11 #define DLFB_IOCTL_RETURN_EDID 0xAD
12 #define DLFB_IOCTL_REPORT_DAMAGE 0xAA
20 struct list_head entry;
21 struct dlfb_data *dev;
22 struct delayed_work release_urb_work;
27 struct list_head list;
29 struct semaphore limit_sem;
36 struct usb_device *udev;
37 struct device *gdev; /* &udev->dev */
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 */
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 */
60 #define NR_USB_REQUEST_I2C_SUB_IO 0x02
61 #define NR_USB_REQUEST_CHANNEL 0x12
63 /* -BULK_SIZE as per usb-skeleton. Can we get full page and avoid overhead? */
65 #define MAX_TRANSFER (PAGE_SIZE*16 - BULK_SIZE)
66 #define WRITES_IN_FLIGHT (4)
68 #define MIN_EDID_SIZE 128
69 #define MAX_EDID_SIZE 128
71 #define MAX_VENDOR_DESCRIPTOR_SIZE 256
73 #define GET_URB_TIMEOUT HZ
74 #define FREE_URB_TIMEOUT (HZ*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 5 /* fb_deferred_io.delay in jiffies */
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(x-(a-1), a)
98 /* remove once this gets added to sysfs.h */
99 #define __ATTR_RW(attr) __ATTR(attr, 0644, attr##_show, attr##_store)
102 * udlfb is both a usb device, and a framebuffer device.
103 * They may exist at the same time, but during various stages
104 * inactivity, teardown, or "virtual" operation, only one or the
105 * other will exist (one will outlive the other). So we can't
106 * call the dev_*() macros, because we don't have a stable dev object.
108 #define dl_err(format, arg...) \
109 pr_err("udlfb: " format, ## arg)
110 #define dl_warn(format, arg...) \
111 pr_warning("udlfb: " format, ## arg)
112 #define dl_notice(format, arg...) \
113 pr_notice("udlfb: " format, ## arg)
114 #define dl_info(format, arg...) \
115 pr_info("udlfb: " format, ## arg)