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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_connector.h>
18#include <drm/drm_crtc.h>
19#include <drm/drm_device.h>
20#include <drm/drm_encoder.h>
21#include <drm/drm_framebuffer.h>
22#include <drm/drm_gem.h>
23#include <drm/drm_plane.h>
24
25struct drm_mode_create_dumb;
26
27#define DRIVER_NAME "udl"
28#define DRIVER_DESC "DisplayLink"
29#define DRIVER_DATE "20120220"
30
31#define DRIVER_MAJOR 0
32#define DRIVER_MINOR 0
33#define DRIVER_PATCHLEVEL 1
34
35struct udl_device;
36
37struct urb_node {
38 struct list_head entry;
39 struct udl_device *dev;
40 struct urb *urb;
41};
42
43struct urb_list {
44 struct list_head list;
45 spinlock_t lock;
46 wait_queue_head_t sleep;
47 int available;
48 int count;
49 size_t size;
50};
51
52struct udl_device {
53 struct drm_device drm;
54 struct device *dev;
55 struct device *dmadev;
56
57 struct drm_plane primary_plane;
58 struct drm_crtc crtc;
59 struct drm_encoder encoder;
60 struct drm_connector connector;
61
62 struct mutex gem_lock;
63
64 int sku_pixel_limit;
65
66 struct urb_list urbs;
67};
68
69#define to_udl(x) container_of(x, struct udl_device, drm)
70
71static inline struct usb_device *udl_to_usb_device(struct udl_device *udl)
72{
73 return interface_to_usbdev(to_usb_interface(udl->drm.dev));
74}
75
76/* modeset */
77int udl_modeset_init(struct drm_device *dev);
78struct drm_connector *udl_connector_init(struct drm_device *dev);
79
80struct urb *udl_get_urb(struct drm_device *dev);
81
82int udl_submit_urb(struct drm_device *dev, struct urb *urb, size_t len);
83void udl_sync_pending_urbs(struct drm_device *dev);
84void udl_urb_completion(struct urb *urb);
85
86int udl_init(struct udl_device *udl);
87
88int udl_render_hline(struct drm_device *dev, int log_bpp, struct urb **urb_ptr,
89 const char *front, char **urb_buf_ptr,
90 u32 byte_offset, u32 device_byte_offset, u32 byte_width);
91
92int udl_drop_usb(struct drm_device *dev);
93int udl_select_std_channel(struct udl_device *udl);
94
95#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 int x1, y1, x2, y2; /* dirty rect */
79 spinlock_t dirty_lock;
80};
81
82#define to_udl_fb(x) container_of(x, struct udl_framebuffer, base)
83
84/* modeset */
85int udl_modeset_init(struct drm_device *dev);
86void udl_modeset_cleanup(struct drm_device *dev);
87int udl_connector_init(struct drm_device *dev, struct drm_encoder *encoder);
88
89struct drm_encoder *udl_encoder_init(struct drm_device *dev);
90
91struct urb *udl_get_urb(struct drm_device *dev);
92
93int udl_submit_urb(struct drm_device *dev, struct urb *urb, size_t len);
94void udl_urb_completion(struct urb *urb);
95
96int udl_driver_load(struct drm_device *dev, unsigned long flags);
97int udl_driver_unload(struct drm_device *dev);
98
99int udl_fbdev_init(struct drm_device *dev);
100void udl_fbdev_cleanup(struct drm_device *dev);
101void udl_fbdev_unplug(struct drm_device *dev);
102struct drm_framebuffer *
103udl_fb_user_fb_create(struct drm_device *dev,
104 struct drm_file *file,
105 struct drm_mode_fb_cmd2 *mode_cmd);
106
107int udl_render_hline(struct drm_device *dev, int bpp, struct urb **urb_ptr,
108 const char *front, char **urb_buf_ptr,
109 u32 byte_offset, u32 device_byte_offset, u32 byte_width,
110 int *ident_ptr, int *sent_ptr);
111
112int udl_dumb_create(struct drm_file *file_priv,
113 struct drm_device *dev,
114 struct drm_mode_create_dumb *args);
115int udl_gem_mmap(struct drm_file *file_priv, struct drm_device *dev,
116 uint32_t handle, uint64_t *offset);
117
118void udl_gem_free_object(struct drm_gem_object *gem_obj);
119struct udl_gem_object *udl_gem_alloc_object(struct drm_device *dev,
120 size_t size);
121struct drm_gem_object *udl_gem_prime_import(struct drm_device *dev,
122 struct dma_buf *dma_buf);
123
124int udl_gem_vmap(struct udl_gem_object *obj);
125void udl_gem_vunmap(struct udl_gem_object *obj);
126int udl_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
127int udl_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf);
128
129int udl_handle_damage(struct udl_framebuffer *fb, int x, int y,
130 int width, int height);
131
132int udl_drop_usb(struct drm_device *dev);
133
134#define CMD_WRITE_RAW8 "\xAF\x60" /**< 8 bit raw write command. */
135#define CMD_WRITE_RL8 "\xAF\x61" /**< 8 bit run length command. */
136#define CMD_WRITE_COPY8 "\xAF\x62" /**< 8 bit copy command. */
137#define CMD_WRITE_RLX8 "\xAF\x63" /**< 8 bit extended run length command. */
138
139#define CMD_WRITE_RAW16 "\xAF\x68" /**< 16 bit raw write command. */
140#define CMD_WRITE_RL16 "\xAF\x69" /**< 16 bit run length command. */
141#define CMD_WRITE_COPY16 "\xAF\x6A" /**< 16 bit copy command. */
142#define CMD_WRITE_RLX16 "\xAF\x6B" /**< 16 bit extended run length command. */
143
144#endif