blob: 1fbf7b357f16ba1c9b6a8baea1fd54292398e041 [file] [log] [blame]
* Copyright (C) 2012 Red Hat
* based in parts on udlfb.c:
* Copyright (C) 2009 Roberto De Ioris <>
* Copyright (C) 2009 Jaya Kumar <>
* Copyright (C) 2009 Bernie Thompson <>
* This file is subject to the terms and conditions of the GNU General Public
* License v2. See the file COPYING in the main directory of this archive for
* more details.
#ifndef UDL_DRV_H
#define UDL_DRV_H
#include <linux/usb.h>
#define DRIVER_NAME "udl"
#define DRIVER_DESC "DisplayLink"
#define DRIVER_DATE "20120220"
#define DRIVER_MAJOR 0
#define DRIVER_MINOR 0
struct udl_device;
struct urb_node {
struct list_head entry;
struct udl_device *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 udl_fbdev;
struct udl_device {
struct device *dev;
struct drm_device *ddev;
int sku_pixel_limit;
struct urb_list urbs;
atomic_t lost_pixels; /* 1 = a render op failed. Need screen refresh */
struct udl_fbdev *fbdev;
char mode_buf[1024];
uint32_t mode_buf_len;
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 */
struct udl_gem_object {
struct drm_gem_object base;
struct page **pages;
void *vmapping;
struct sg_table *sg;
#define to_udl_bo(x) container_of(x, struct udl_gem_object, base)
struct udl_framebuffer {
struct drm_framebuffer base;
struct udl_gem_object *obj;
bool active_16; /* active on the 16-bit channel */
int x1, y1, x2, y2; /* dirty rect */
spinlock_t dirty_lock;
#define to_udl_fb(x) container_of(x, struct udl_framebuffer, base)
/* modeset */
int udl_modeset_init(struct drm_device *dev);
void udl_modeset_cleanup(struct drm_device *dev);
int udl_connector_init(struct drm_device *dev, struct drm_encoder *encoder);
struct drm_encoder *udl_encoder_init(struct drm_device *dev);
struct urb *udl_get_urb(struct drm_device *dev);
int udl_submit_urb(struct drm_device *dev, struct urb *urb, size_t len);
void udl_urb_completion(struct urb *urb);
int udl_driver_load(struct drm_device *dev, unsigned long flags);
int udl_driver_unload(struct drm_device *dev);
int udl_fbdev_init(struct drm_device *dev);
void udl_fbdev_cleanup(struct drm_device *dev);
void udl_fbdev_unplug(struct drm_device *dev);
struct drm_framebuffer *
udl_fb_user_fb_create(struct drm_device *dev,
struct drm_file *file,
struct drm_mode_fb_cmd2 *mode_cmd);
int udl_render_hline(struct drm_device *dev, int bpp, struct urb **urb_ptr,
const char *front, char **urb_buf_ptr,
u32 byte_offset, u32 device_byte_offset, u32 byte_width,
int *ident_ptr, int *sent_ptr);
int udl_dumb_create(struct drm_file *file_priv,
struct drm_device *dev,
struct drm_mode_create_dumb *args);
int udl_gem_mmap(struct drm_file *file_priv, struct drm_device *dev,
uint32_t handle, uint64_t *offset);
void udl_gem_free_object(struct drm_gem_object *gem_obj);
struct udl_gem_object *udl_gem_alloc_object(struct drm_device *dev,
size_t size);
struct drm_gem_object *udl_gem_prime_import(struct drm_device *dev,
struct dma_buf *dma_buf);
int udl_gem_vmap(struct udl_gem_object *obj);
void udl_gem_vunmap(struct udl_gem_object *obj);
int udl_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
int udl_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf);
int udl_handle_damage(struct udl_framebuffer *fb, int x, int y,
int width, int height);
int udl_drop_usb(struct drm_device *dev);
#define CMD_WRITE_RAW8 "\xAF\x60" /**< 8 bit raw write command. */
#define CMD_WRITE_RL8 "\xAF\x61" /**< 8 bit run length command. */
#define CMD_WRITE_COPY8 "\xAF\x62" /**< 8 bit copy command. */
#define CMD_WRITE_RLX8 "\xAF\x63" /**< 8 bit extended run length command. */
#define CMD_WRITE_RAW16 "\xAF\x68" /**< 16 bit raw write command. */
#define CMD_WRITE_RL16 "\xAF\x69" /**< 16 bit run length command. */
#define CMD_WRITE_COPY16 "\xAF\x6A" /**< 16 bit copy command. */
#define CMD_WRITE_RLX16 "\xAF\x6B" /**< 16 bit extended run length command. */