xref: /openbmc/linux/drivers/gpu/drm/udl/udl_drv.h (revision 6774def6)
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 
20 #define DRIVER_NAME		"udl"
21 #define DRIVER_DESC		"DisplayLink"
22 #define DRIVER_DATE		"20120220"
23 
24 #define DRIVER_MAJOR		0
25 #define DRIVER_MINOR		0
26 #define DRIVER_PATCHLEVEL	1
27 
28 struct udl_device;
29 
30 struct urb_node {
31 	struct list_head entry;
32 	struct udl_device *dev;
33 	struct delayed_work release_urb_work;
34 	struct urb *urb;
35 };
36 
37 struct urb_list {
38 	struct list_head list;
39 	spinlock_t lock;
40 	struct semaphore limit_sem;
41 	int available;
42 	int count;
43 	size_t size;
44 };
45 
46 struct udl_fbdev;
47 
48 struct udl_device {
49 	struct device *dev;
50 	struct drm_device *ddev;
51 	struct usb_device *udev;
52 
53 	int sku_pixel_limit;
54 
55 	struct urb_list urbs;
56 	atomic_t lost_pixels; /* 1 = a render op failed. Need screen refresh */
57 
58 	struct udl_fbdev *fbdev;
59 	char mode_buf[1024];
60 	uint32_t mode_buf_len;
61 	atomic_t bytes_rendered; /* raw pixel-bytes driver asked to render */
62 	atomic_t bytes_identical; /* saved effort with backbuffer comparison */
63 	atomic_t bytes_sent; /* to usb, after compression including overhead */
64 	atomic_t cpu_kcycles_used; /* transpired during pixel processing */
65 };
66 
67 struct udl_gem_object {
68 	struct drm_gem_object base;
69 	struct page **pages;
70 	void *vmapping;
71 	struct sg_table *sg;
72 };
73 
74 #define to_udl_bo(x) container_of(x, struct udl_gem_object, base)
75 
76 struct udl_framebuffer {
77 	struct drm_framebuffer base;
78 	struct udl_gem_object *obj;
79 	bool active_16; /* active on the 16-bit channel */
80 	int x1, y1, x2, y2; /* dirty rect */
81 	spinlock_t dirty_lock;
82 };
83 
84 #define to_udl_fb(x) container_of(x, struct udl_framebuffer, base)
85 
86 /* modeset */
87 int udl_modeset_init(struct drm_device *dev);
88 void udl_modeset_cleanup(struct drm_device *dev);
89 int udl_connector_init(struct drm_device *dev, struct drm_encoder *encoder);
90 
91 struct drm_encoder *udl_encoder_init(struct drm_device *dev);
92 
93 struct urb *udl_get_urb(struct drm_device *dev);
94 
95 int udl_submit_urb(struct drm_device *dev, struct urb *urb, size_t len);
96 void udl_urb_completion(struct urb *urb);
97 
98 int udl_driver_load(struct drm_device *dev, unsigned long flags);
99 int udl_driver_unload(struct drm_device *dev);
100 
101 int udl_fbdev_init(struct drm_device *dev);
102 void udl_fbdev_cleanup(struct drm_device *dev);
103 void udl_fbdev_unplug(struct drm_device *dev);
104 struct drm_framebuffer *
105 udl_fb_user_fb_create(struct drm_device *dev,
106 		      struct drm_file *file,
107 		      struct drm_mode_fb_cmd2 *mode_cmd);
108 
109 int udl_render_hline(struct drm_device *dev, int bpp, struct urb **urb_ptr,
110 		     const char *front, char **urb_buf_ptr,
111 		     u32 byte_offset, u32 device_byte_offset, u32 byte_width,
112 		     int *ident_ptr, int *sent_ptr);
113 
114 int udl_dumb_create(struct drm_file *file_priv,
115 		    struct drm_device *dev,
116 		    struct drm_mode_create_dumb *args);
117 int udl_gem_mmap(struct drm_file *file_priv, struct drm_device *dev,
118 		 uint32_t handle, uint64_t *offset);
119 
120 void udl_gem_free_object(struct drm_gem_object *gem_obj);
121 struct udl_gem_object *udl_gem_alloc_object(struct drm_device *dev,
122 					    size_t size);
123 struct drm_gem_object *udl_gem_prime_import(struct drm_device *dev,
124 				struct dma_buf *dma_buf);
125 
126 int udl_gem_vmap(struct udl_gem_object *obj);
127 void udl_gem_vunmap(struct udl_gem_object *obj);
128 int udl_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
129 int udl_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf);
130 
131 int udl_handle_damage(struct udl_framebuffer *fb, int x, int y,
132 		      int width, int height);
133 
134 int udl_drop_usb(struct drm_device *dev);
135 
136 #define CMD_WRITE_RAW8   "\xAF\x60" /**< 8 bit raw write command. */
137 #define CMD_WRITE_RL8    "\xAF\x61" /**< 8 bit run length command. */
138 #define CMD_WRITE_COPY8  "\xAF\x62" /**< 8 bit copy command. */
139 #define CMD_WRITE_RLX8   "\xAF\x63" /**< 8 bit extended run length command. */
140 
141 #define CMD_WRITE_RAW16  "\xAF\x68" /**< 16 bit raw write command. */
142 #define CMD_WRITE_RL16   "\xAF\x69" /**< 16 bit run length command. */
143 #define CMD_WRITE_COPY16 "\xAF\x6A" /**< 16 bit copy command. */
144 #define CMD_WRITE_RLX16  "\xAF\x6B" /**< 16 bit extended run length command. */
145 
146 #endif
147