tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright (C) 2012 Red Hat
3 *
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>
8 *
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
11 * more details.
12 */
13
14#ifndef UDL_DRV_H
15#define UDL_DRV_H
16
17#include <linux/usb.h>
18#include <drm/drm_gem.h>
19#include <linux/mm_types.h>
20
21#define DRIVER_NAME "udl"
22#define DRIVER_DESC "DisplayLink"
23#define DRIVER_DATE "20120220"
24
25#define DRIVER_MAJOR 0
26#define DRIVER_MINOR 0
27#define DRIVER_PATCHLEVEL 1
28
29#define UDL_BO_CACHEABLE (1 << 0)
30#define UDL_BO_WC (1 << 1)
31
32struct udl_device;
33
34struct urb_node {
35 struct list_head entry;
36 struct udl_device *dev;
37 struct delayed_work release_urb_work;
38 struct urb *urb;
39};
40
41struct urb_list {
42 struct list_head list;
43 spinlock_t lock;
44 struct semaphore limit_sem;
45 int available;
46 int count;
47 size_t size;
48};
49
50struct udl_fbdev;
51
52struct udl_device {
53 struct device *dev;
54 struct drm_device *ddev;
55 struct usb_device *udev;
56 struct drm_crtc *crtc;
57
58 struct mutex gem_lock;
59
60 int sku_pixel_limit;
61
62 struct urb_list urbs;
63 atomic_t lost_pixels; /* 1 = a render op failed. Need screen refresh */
64
65 struct udl_fbdev *fbdev;
66 char mode_buf[1024];
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 */
72};
73
74struct udl_gem_object {
75 struct drm_gem_object base;
76 struct page **pages;
77 void *vmapping;
78 struct sg_table *sg;
79 unsigned int flags;
80};
81
82#define to_udl_bo(x) container_of(x, struct udl_gem_object, base)
83
84struct udl_framebuffer {
85 struct drm_framebuffer base;
86 struct udl_gem_object *obj;
87 bool active_16; /* active on the 16-bit channel */
88};
89
90#define to_udl_fb(x) container_of(x, struct udl_framebuffer, base)
91
92/* modeset */
93int udl_modeset_init(struct drm_device *dev);
94void udl_modeset_restore(struct drm_device *dev);
95void udl_modeset_cleanup(struct drm_device *dev);
96int udl_connector_init(struct drm_device *dev, struct drm_encoder *encoder);
97
98struct drm_encoder *udl_encoder_init(struct drm_device *dev);
99
100struct urb *udl_get_urb(struct drm_device *dev);
101
102int udl_submit_urb(struct drm_device *dev, struct urb *urb, size_t len);
103void udl_urb_completion(struct urb *urb);
104
105int udl_driver_load(struct drm_device *dev, unsigned long flags);
106void udl_driver_unload(struct drm_device *dev);
107
108int udl_fbdev_init(struct drm_device *dev);
109void udl_fbdev_cleanup(struct drm_device *dev);
110void udl_fbdev_unplug(struct drm_device *dev);
111struct drm_framebuffer *
112udl_fb_user_fb_create(struct drm_device *dev,
113 struct drm_file *file,
114 const struct drm_mode_fb_cmd2 *mode_cmd);
115
116int udl_render_hline(struct drm_device *dev, int log_bpp, struct urb **urb_ptr,
117 const char *front, char **urb_buf_ptr,
118 u32 byte_offset, u32 device_byte_offset, u32 byte_width,
119 int *ident_ptr, int *sent_ptr);
120
121int udl_dumb_create(struct drm_file *file_priv,
122 struct drm_device *dev,
123 struct drm_mode_create_dumb *args);
124int udl_gem_mmap(struct drm_file *file_priv, struct drm_device *dev,
125 uint32_t handle, uint64_t *offset);
126
127void udl_gem_free_object(struct drm_gem_object *gem_obj);
128struct udl_gem_object *udl_gem_alloc_object(struct drm_device *dev,
129 size_t size);
130struct dma_buf *udl_gem_prime_export(struct drm_device *dev,
131 struct drm_gem_object *obj, int flags);
132struct drm_gem_object *udl_gem_prime_import(struct drm_device *dev,
133 struct dma_buf *dma_buf);
134
135int udl_gem_get_pages(struct udl_gem_object *obj);
136void udl_gem_put_pages(struct udl_gem_object *obj);
137int udl_gem_vmap(struct udl_gem_object *obj);
138void udl_gem_vunmap(struct udl_gem_object *obj);
139int udl_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
140vm_fault_t udl_gem_fault(struct vm_fault *vmf);
141
142int udl_handle_damage(struct udl_framebuffer *fb, int x, int y,
143 int width, int height);
144
145int udl_drop_usb(struct drm_device *dev);
146
147#define CMD_WRITE_RAW8 "\xAF\x60" /**< 8 bit raw write command. */
148#define CMD_WRITE_RL8 "\xAF\x61" /**< 8 bit run length command. */
149#define CMD_WRITE_COPY8 "\xAF\x62" /**< 8 bit copy command. */
150#define CMD_WRITE_RLX8 "\xAF\x63" /**< 8 bit extended run length command. */
151
152#define CMD_WRITE_RAW16 "\xAF\x68" /**< 16 bit raw write command. */
153#define CMD_WRITE_RL16 "\xAF\x69" /**< 16 bit run length command. */
154#define CMD_WRITE_COPY16 "\xAF\x6A" /**< 16 bit copy command. */
155#define CMD_WRITE_RLX16 "\xAF\x6B" /**< 16 bit extended run length command. */
156
157#endif