diff options
Diffstat (limited to 'include/video')
| -rw-r--r-- | include/video/udlfb.h | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/include/video/udlfb.h b/include/video/udlfb.h new file mode 100644 index 0000000..6f9785e --- /dev/null +++ b/include/video/udlfb.h @@ -0,0 +1,117 @@ +#ifndef UDLFB_H +#define UDLFB_H + +/* + * TODO: Propose standard fb.h ioctl for reporting damage, + * using _IOWR() and one of the existing area structs from fb.h + * Consider these ioctls deprecated, but they're still used by the + * DisplayLink X server as yet - need both to be modified in tandem + * when new ioctl(s) are ready. + */ +#define DLFB_IOCTL_RETURN_EDID 0xAD +#define DLFB_IOCTL_REPORT_DAMAGE 0xAA +struct dloarea { + int x, y; + int w, h; + int x2, y2; +}; + +struct urb_node { + struct list_head entry; + struct dlfb_data *dev; + struct delayed_work release_urb_work; + struct urb *urb; +}; + +struct urb_list { + struct list_head list; + spinlock_t lock; + struct semaphore limit_sem; + int available; + int count; + size_t size; +}; + +struct dlfb_data { + struct usb_device *udev; + struct device *gdev; /* &udev->dev */ + struct fb_info *info; + struct urb_list urbs; + struct kref kref; + char *backing_buffer; + int fb_count; + bool virtualized; /* true when physical usb device not present */ + struct delayed_work free_framebuffer_work; + atomic_t usb_active; /* 0 = update virtual buffer, but no usb traffic */ + atomic_t lost_pixels; /* 1 = a render op failed. Need screen refresh */ + char *edid; /* null until we read edid from hw or get from sysfs */ + size_t edid_size; + int sku_pixel_limit; + int base16; + int base8; + u32 pseudo_palette[256]; + /* blit-only rendering path metrics, exposed through sysfs */ + atomic_t bytes_rendered; /* raw pixel-bytes driver asked to render */ + atomic_t bytes_identical; /* saved effort with backbuffer comparison */ + atomic_t bytes_sent; /* to usb, after compression including overhead */ + atomic_t cpu_kcycles_used; /* transpired during pixel processing */ +}; + +#define NR_USB_REQUEST_I2C_SUB_IO 0x02 +#define NR_USB_REQUEST_CHANNEL 0x12 + +/* -BULK_SIZE as per usb-skeleton. Can we get full page and avoid overhead? */ +#define BULK_SIZE 512 +#define MAX_TRANSFER (PAGE_SIZE*16 - BULK_SIZE) +#define WRITES_IN_FLIGHT (4) + +#define MIN_EDID_SIZE 128 +#define MAX_EDID_SIZE 128 + +#define MAX_VENDOR_DESCRIPTOR_SIZE 256 + +#define GET_URB_TIMEOUT HZ +#define FREE_URB_TIMEOUT (HZ*2) + +#define BPP 2 +#define MAX_CMD_PIXELS 255 + +#define RLX_HEADER_BYTES 7 +#define MIN_RLX_PIX_BYTES 4 +#define MIN_RLX_CMD_BYTES (RLX_HEADER_BYTES + MIN_RLX_PIX_BYTES) + +#define RLE_HEADER_BYTES 6 +#define MIN_RLE_PIX_BYTES 3 +#define MIN_RLE_CMD_BYTES (RLE_HEADER_BYTES + MIN_RLE_PIX_BYTES) + +#define RAW_HEADER_BYTES 6 +#define MIN_RAW_PIX_BYTES 2 +#define MIN_RAW_CMD_BYTES (RAW_HEADER_BYTES + MIN_RAW_PIX_BYTES) + +#define DL_DEFIO_WRITE_DELAY 5 /* fb_deferred_io.delay in jiffies */ +#define DL_DEFIO_WRITE_DISABLE (HZ*60) /* "disable" with long delay */ + +/* remove these once align.h patch is taken into kernel */ +#define DL_ALIGN_UP(x, a) ALIGN(x, a) +#define DL_ALIGN_DOWN(x, a) ALIGN(x-(a-1), a) + +/* remove once this gets added to sysfs.h */ +#define __ATTR_RW(attr) __ATTR(attr, 0644, attr##_show, attr##_store) + +/* + * udlfb is both a usb device, and a framebuffer device. + * They may exist at the same time, but during various stages + * inactivity, teardown, or "virtual" operation, only one or the + * other will exist (one will outlive the other). So we can't + * call the dev_*() macros, because we don't have a stable dev object. + */ +#define dl_err(format, arg...) \ + pr_err("udlfb: " format, ## arg) +#define dl_warn(format, arg...) \ + pr_warning("udlfb: " format, ## arg) +#define dl_notice(format, arg...) \ + pr_notice("udlfb: " format, ## arg) +#define dl_info(format, arg...) \ + pr_info("udlfb: " format, ## arg) + +#endif |