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1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Copyright (C) 2012 Red Hat
4 *
5 * based in parts on udlfb.c:
6 * Copyright (C) 2009 Roberto De Ioris <roberto@unbit.it>
7 * Copyright (C) 2009 Jaya Kumar <jayakumar.lkml@gmail.com>
8 * Copyright (C) 2009 Bernie Thompson <bernie@plugable.com>
9 */
10
11#ifndef UDL_DRV_H
12#define UDL_DRV_H
13
14#include <linux/mm_types.h>
15#include <linux/usb.h>
16
17#include <drm/drm_device.h>
18#include <drm/drm_framebuffer.h>
19#include <drm/drm_gem.h>
20#include <drm/drm_simple_kms_helper.h>
21
22struct drm_mode_create_dumb;
23
24#define DRIVER_NAME "udl"
25#define DRIVER_DESC "DisplayLink"
26#define DRIVER_DATE "20120220"
27
28#define DRIVER_MAJOR 0
29#define DRIVER_MINOR 0
30#define DRIVER_PATCHLEVEL 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_device {
51 struct drm_device drm;
52 struct device *dev;
53 struct usb_device *udev;
54
55 struct drm_simple_display_pipe display_pipe;
56
57 struct mutex gem_lock;
58
59 int sku_pixel_limit;
60
61 struct urb_list urbs;
62
63 char mode_buf[1024];
64 uint32_t mode_buf_len;
65};
66
67#define to_udl(x) container_of(x, struct udl_device, drm)
68
69/* modeset */
70int udl_modeset_init(struct drm_device *dev);
71struct drm_connector *udl_connector_init(struct drm_device *dev);
72
73struct urb *udl_get_urb(struct drm_device *dev);
74
75int udl_submit_urb(struct drm_device *dev, struct urb *urb, size_t len);
76void udl_urb_completion(struct urb *urb);
77
78int udl_init(struct udl_device *udl);
79
80int udl_render_hline(struct drm_device *dev, int log_bpp, struct urb **urb_ptr,
81 const char *front, char **urb_buf_ptr,
82 u32 byte_offset, u32 device_byte_offset, u32 byte_width);
83
84int udl_drop_usb(struct drm_device *dev);
85
86#define CMD_WRITE_RAW8 "\xAF\x60" /**< 8 bit raw write command. */
87#define CMD_WRITE_RL8 "\xAF\x61" /**< 8 bit run length command. */
88#define CMD_WRITE_COPY8 "\xAF\x62" /**< 8 bit copy command. */
89#define CMD_WRITE_RLX8 "\xAF\x63" /**< 8 bit extended run length command. */
90
91#define CMD_WRITE_RAW16 "\xAF\x68" /**< 16 bit raw write command. */
92#define CMD_WRITE_RL16 "\xAF\x69" /**< 16 bit run length command. */
93#define CMD_WRITE_COPY16 "\xAF\x6A" /**< 16 bit copy command. */
94#define CMD_WRITE_RLX16 "\xAF\x6B" /**< 16 bit extended run length command. */
95
96/* On/Off for driving the DisplayLink framebuffer to the display */
97#define UDL_REG_BLANK_MODE 0x1f
98
99#define UDL_BLANK_MODE_ON 0x00 /* hsync and vsync on, visible */
100#define UDL_BLANK_MODE_BLANKED 0x01 /* hsync and vsync on, blanked */
101#define UDL_BLANK_MODE_VSYNC_OFF 0x03 /* vsync off, blanked */
102#define UDL_BLANK_MODE_HSYNC_OFF 0x05 /* hsync off, blanked */
103#define UDL_BLANK_MODE_POWERDOWN 0x07 /* powered off; requires modeset */
104
105#endif
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
19#define DRIVER_NAME "udl"
20#define DRIVER_DESC "DisplayLink"
21#define DRIVER_DATE "20120220"
22
23#define DRIVER_MAJOR 0
24#define DRIVER_MINOR 0
25#define DRIVER_PATCHLEVEL 1
26
27struct udl_device;
28
29struct urb_node {
30 struct list_head entry;
31 struct udl_device *dev;
32 struct delayed_work release_urb_work;
33 struct urb *urb;
34};
35
36struct urb_list {
37 struct list_head list;
38 spinlock_t lock;
39 struct semaphore limit_sem;
40 int available;
41 int count;
42 size_t size;
43};
44
45struct udl_fbdev;
46
47struct udl_device {
48 struct device *dev;
49 struct drm_device *ddev;
50
51 int sku_pixel_limit;
52
53 struct urb_list urbs;
54 atomic_t lost_pixels; /* 1 = a render op failed. Need screen refresh */
55
56 struct udl_fbdev *fbdev;
57 char mode_buf[1024];
58 uint32_t mode_buf_len;
59 atomic_t bytes_rendered; /* raw pixel-bytes driver asked to render */
60 atomic_t bytes_identical; /* saved effort with backbuffer comparison */
61 atomic_t bytes_sent; /* to usb, after compression including overhead */
62 atomic_t cpu_kcycles_used; /* transpired during pixel processing */
63};
64
65struct udl_gem_object {
66 struct drm_gem_object base;
67 struct page **pages;
68 void *vmapping;
69 struct sg_table *sg;
70};
71
72#define to_udl_bo(x) container_of(x, struct udl_gem_object, base)
73
74struct udl_framebuffer {
75 struct drm_framebuffer base;
76 struct udl_gem_object *obj;
77 bool active_16; /* active on the 16-bit channel */
78};
79
80#define to_udl_fb(x) container_of(x, struct udl_framebuffer, base)
81
82/* modeset */
83int udl_modeset_init(struct drm_device *dev);
84void udl_modeset_cleanup(struct drm_device *dev);
85int udl_connector_init(struct drm_device *dev, struct drm_encoder *encoder);
86
87struct drm_encoder *udl_encoder_init(struct drm_device *dev);
88
89struct urb *udl_get_urb(struct drm_device *dev);
90
91int udl_submit_urb(struct drm_device *dev, struct urb *urb, size_t len);
92void udl_urb_completion(struct urb *urb);
93
94int udl_driver_load(struct drm_device *dev, unsigned long flags);
95int udl_driver_unload(struct drm_device *dev);
96
97int udl_fbdev_init(struct drm_device *dev);
98void udl_fbdev_cleanup(struct drm_device *dev);
99void udl_fbdev_unplug(struct drm_device *dev);
100struct drm_framebuffer *
101udl_fb_user_fb_create(struct drm_device *dev,
102 struct drm_file *file,
103 struct drm_mode_fb_cmd2 *mode_cmd);
104
105int udl_render_hline(struct drm_device *dev, int bpp, struct urb **urb_ptr,
106 const char *front, char **urb_buf_ptr,
107 u32 byte_offset, u32 byte_width,
108 int *ident_ptr, int *sent_ptr);
109
110int udl_dumb_create(struct drm_file *file_priv,
111 struct drm_device *dev,
112 struct drm_mode_create_dumb *args);
113int udl_gem_mmap(struct drm_file *file_priv, struct drm_device *dev,
114 uint32_t handle, uint64_t *offset);
115int udl_dumb_destroy(struct drm_file *file_priv, struct drm_device *dev,
116 uint32_t handle);
117
118int udl_gem_init_object(struct drm_gem_object *obj);
119void udl_gem_free_object(struct drm_gem_object *gem_obj);
120struct udl_gem_object *udl_gem_alloc_object(struct drm_device *dev,
121 size_t size);
122struct drm_gem_object *udl_gem_prime_import(struct drm_device *dev,
123 struct dma_buf *dma_buf);
124
125int udl_gem_vmap(struct udl_gem_object *obj);
126void udl_gem_vunmap(struct udl_gem_object *obj);
127int udl_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
128int udl_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf);
129
130int udl_handle_damage(struct udl_framebuffer *fb, int x, int y,
131 int width, int height);
132
133int udl_drop_usb(struct drm_device *dev);
134
135#define CMD_WRITE_RAW8 "\xAF\x60" /**< 8 bit raw write command. */
136#define CMD_WRITE_RL8 "\xAF\x61" /**< 8 bit run length command. */
137#define CMD_WRITE_COPY8 "\xAF\x62" /**< 8 bit copy command. */
138#define CMD_WRITE_RLX8 "\xAF\x63" /**< 8 bit extended run length command. */
139
140#define CMD_WRITE_RAW16 "\xAF\x68" /**< 16 bit raw write command. */
141#define CMD_WRITE_RL16 "\xAF\x69" /**< 16 bit run length command. */
142#define CMD_WRITE_COPY16 "\xAF\x6A" /**< 16 bit copy command. */
143#define CMD_WRITE_RLX16 "\xAF\x6B" /**< 16 bit extended run length command. */
144
145#endif