2 * Copyright (C) 2012 Red Hat
4 * based in parts on udlfb.c:
5 * Copyright (C) 2009 Roberto De Ioris <roberto@unbit.it>
6 * Copyright (C) 2009 Jaya Kumar <jayakumar.lkml@gmail.com>
7 * Copyright (C) 2009 Bernie Thompson <bernie@plugable.com>
9 * This file is subject to the terms and conditions of the GNU General Public
10 * License v2. See the file COPYING in the main directory of this archive for
17 #include <linux/usb.h>
18 #include <drm/drm_gem.h>
19 #include <linux/mm_types.h>
21 #define DRIVER_NAME "udl"
22 #define DRIVER_DESC "DisplayLink"
23 #define DRIVER_DATE "20120220"
25 #define DRIVER_MAJOR 0
26 #define DRIVER_MINOR 0
27 #define DRIVER_PATCHLEVEL 1
29 #define UDL_BO_CACHEABLE (1 << 0)
30 #define UDL_BO_WC (1 << 1)
35 struct list_head entry;
36 struct udl_device *dev;
37 struct delayed_work release_urb_work;
42 struct list_head list;
44 struct semaphore limit_sem;
54 struct drm_device *ddev;
55 struct usb_device *udev;
56 struct drm_crtc *crtc;
58 struct mutex gem_lock;
63 atomic_t lost_pixels; /* 1 = a render op failed. Need screen refresh */
65 struct udl_fbdev *fbdev;
67 uint32_t mode_buf_len;
68 atomic_t bytes_rendered; /* raw pixel-bytes driver asked to render */
69 atomic_t bytes_identical; /* saved effort with backbuffer comparison */
70 atomic_t bytes_sent; /* to usb, after compression including overhead */
71 atomic_t cpu_kcycles_used; /* transpired during pixel processing */
74 struct udl_gem_object {
75 struct drm_gem_object base;
82 #define to_udl_bo(x) container_of(x, struct udl_gem_object, base)
84 struct udl_framebuffer {
85 struct drm_framebuffer base;
86 struct udl_gem_object *obj;
87 bool active_16; /* active on the 16-bit channel */
90 #define to_udl_fb(x) container_of(x, struct udl_framebuffer, base)
93 int udl_modeset_init(struct drm_device *dev);
94 void udl_modeset_restore(struct drm_device *dev);
95 void udl_modeset_cleanup(struct drm_device *dev);
96 int udl_connector_init(struct drm_device *dev, struct drm_encoder *encoder);
98 struct drm_encoder *udl_encoder_init(struct drm_device *dev);
100 struct urb *udl_get_urb(struct drm_device *dev);
102 int udl_submit_urb(struct drm_device *dev, struct urb *urb, size_t len);
103 void udl_urb_completion(struct urb *urb);
105 int udl_driver_load(struct drm_device *dev, unsigned long flags);
106 void udl_driver_unload(struct drm_device *dev);
107 void udl_driver_release(struct drm_device *dev);
109 int udl_fbdev_init(struct drm_device *dev);
110 void udl_fbdev_cleanup(struct drm_device *dev);
111 void udl_fbdev_unplug(struct drm_device *dev);
112 struct drm_framebuffer *
113 udl_fb_user_fb_create(struct drm_device *dev,
114 struct drm_file *file,
115 const struct drm_mode_fb_cmd2 *mode_cmd);
117 int udl_render_hline(struct drm_device *dev, int log_bpp, struct urb **urb_ptr,
118 const char *front, char **urb_buf_ptr,
119 u32 byte_offset, u32 device_byte_offset, u32 byte_width,
120 int *ident_ptr, int *sent_ptr);
122 int udl_dumb_create(struct drm_file *file_priv,
123 struct drm_device *dev,
124 struct drm_mode_create_dumb *args);
125 int udl_gem_mmap(struct drm_file *file_priv, struct drm_device *dev,
126 uint32_t handle, uint64_t *offset);
128 void udl_gem_free_object(struct drm_gem_object *gem_obj);
129 struct udl_gem_object *udl_gem_alloc_object(struct drm_device *dev,
131 struct dma_buf *udl_gem_prime_export(struct drm_device *dev,
132 struct drm_gem_object *obj, int flags);
133 struct drm_gem_object *udl_gem_prime_import(struct drm_device *dev,
134 struct dma_buf *dma_buf);
136 int udl_gem_get_pages(struct udl_gem_object *obj);
137 void udl_gem_put_pages(struct udl_gem_object *obj);
138 int udl_gem_vmap(struct udl_gem_object *obj);
139 void udl_gem_vunmap(struct udl_gem_object *obj);
140 int udl_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
141 vm_fault_t udl_gem_fault(struct vm_fault *vmf);
143 int udl_handle_damage(struct udl_framebuffer *fb, int x, int y,
144 int width, int height);
146 int udl_drop_usb(struct drm_device *dev);
148 #define CMD_WRITE_RAW8 "\xAF\x60" /**< 8 bit raw write command. */
149 #define CMD_WRITE_RL8 "\xAF\x61" /**< 8 bit run length command. */
150 #define CMD_WRITE_COPY8 "\xAF\x62" /**< 8 bit copy command. */
151 #define CMD_WRITE_RLX8 "\xAF\x63" /**< 8 bit extended run length command. */
153 #define CMD_WRITE_RAW16 "\xAF\x68" /**< 16 bit raw write command. */
154 #define CMD_WRITE_RL16 "\xAF\x69" /**< 16 bit run length command. */
155 #define CMD_WRITE_COPY16 "\xAF\x6A" /**< 16 bit copy command. */
156 #define CMD_WRITE_RLX16 "\xAF\x6B" /**< 16 bit extended run length command. */