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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
21struct drm_encoder;
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
32#define UDL_BO_CACHEABLE (1 << 0)
33#define UDL_BO_WC (1 << 1)
34
35struct udl_device;
36
37struct urb_node {
38 struct list_head entry;
39 struct udl_device *dev;
40 struct delayed_work release_urb_work;
41 struct urb *urb;
42};
43
44struct urb_list {
45 struct list_head list;
46 spinlock_t lock;
47 struct semaphore limit_sem;
48 int available;
49 int count;
50 size_t size;
51};
52
53struct udl_fbdev;
54
55struct udl_device {
56 struct drm_device drm;
57 struct device *dev;
58 struct usb_device *udev;
59 struct drm_crtc *crtc;
60
61 struct mutex gem_lock;
62
63 int sku_pixel_limit;
64
65 struct urb_list urbs;
66 atomic_t lost_pixels; /* 1 = a render op failed. Need screen refresh */
67
68 struct udl_fbdev *fbdev;
69 char mode_buf[1024];
70 uint32_t mode_buf_len;
71 atomic_t bytes_rendered; /* raw pixel-bytes driver asked to render */
72 atomic_t bytes_identical; /* saved effort with backbuffer comparison */
73 atomic_t bytes_sent; /* to usb, after compression including overhead */
74 atomic_t cpu_kcycles_used; /* transpired during pixel processing */
75};
76
77#define to_udl(x) container_of(x, struct udl_device, drm)
78
79struct udl_gem_object {
80 struct drm_gem_object base;
81 struct page **pages;
82 void *vmapping;
83 struct sg_table *sg;
84 unsigned int flags;
85};
86
87#define to_udl_bo(x) container_of(x, struct udl_gem_object, base)
88
89struct udl_framebuffer {
90 struct drm_framebuffer base;
91 struct udl_gem_object *obj;
92 bool active_16; /* active on the 16-bit channel */
93};
94
95#define to_udl_fb(x) container_of(x, struct udl_framebuffer, base)
96
97/* modeset */
98int udl_modeset_init(struct drm_device *dev);
99void udl_modeset_restore(struct drm_device *dev);
100void udl_modeset_cleanup(struct drm_device *dev);
101int udl_connector_init(struct drm_device *dev, struct drm_encoder *encoder);
102
103struct drm_encoder *udl_encoder_init(struct drm_device *dev);
104
105struct urb *udl_get_urb(struct drm_device *dev);
106
107int udl_submit_urb(struct drm_device *dev, struct urb *urb, size_t len);
108void udl_urb_completion(struct urb *urb);
109
110int udl_init(struct udl_device *udl);
111void udl_fini(struct drm_device *dev);
112
113int udl_fbdev_init(struct drm_device *dev);
114void udl_fbdev_cleanup(struct drm_device *dev);
115void udl_fbdev_unplug(struct drm_device *dev);
116struct drm_framebuffer *
117udl_fb_user_fb_create(struct drm_device *dev,
118 struct drm_file *file,
119 const struct drm_mode_fb_cmd2 *mode_cmd);
120
121int udl_render_hline(struct drm_device *dev, int log_bpp, struct urb **urb_ptr,
122 const char *front, char **urb_buf_ptr,
123 u32 byte_offset, u32 device_byte_offset, u32 byte_width,
124 int *ident_ptr, int *sent_ptr);
125
126int udl_dumb_create(struct drm_file *file_priv,
127 struct drm_device *dev,
128 struct drm_mode_create_dumb *args);
129int udl_gem_mmap(struct drm_file *file_priv, struct drm_device *dev,
130 uint32_t handle, uint64_t *offset);
131
132void udl_gem_free_object(struct drm_gem_object *gem_obj);
133struct udl_gem_object *udl_gem_alloc_object(struct drm_device *dev,
134 size_t size);
135struct dma_buf *udl_gem_prime_export(struct drm_gem_object *obj, int flags);
136struct drm_gem_object *udl_gem_prime_import(struct drm_device *dev,
137 struct dma_buf *dma_buf);
138
139int udl_gem_get_pages(struct udl_gem_object *obj);
140void udl_gem_put_pages(struct udl_gem_object *obj);
141int udl_gem_vmap(struct udl_gem_object *obj);
142void udl_gem_vunmap(struct udl_gem_object *obj);
143int udl_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
144vm_fault_t udl_gem_fault(struct vm_fault *vmf);
145
146int udl_handle_damage(struct udl_framebuffer *fb, int x, int y,
147 int width, int height);
148
149int udl_drop_usb(struct drm_device *dev);
150
151#define CMD_WRITE_RAW8 "\xAF\x60" /**< 8 bit raw write command. */
152#define CMD_WRITE_RL8 "\xAF\x61" /**< 8 bit run length command. */
153#define CMD_WRITE_COPY8 "\xAF\x62" /**< 8 bit copy command. */
154#define CMD_WRITE_RLX8 "\xAF\x63" /**< 8 bit extended run length command. */
155
156#define CMD_WRITE_RAW16 "\xAF\x68" /**< 16 bit raw write command. */
157#define CMD_WRITE_RL16 "\xAF\x69" /**< 16 bit run length command. */
158#define CMD_WRITE_COPY16 "\xAF\x6A" /**< 16 bit copy command. */
159#define CMD_WRITE_RLX16 "\xAF\x6B" /**< 16 bit extended run length command. */
160
161#endif
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 device *dmadev;
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
69static inline struct usb_device *udl_to_usb_device(struct udl_device *udl)
70{
71 return interface_to_usbdev(to_usb_interface(udl->drm.dev));
72}
73
74/* modeset */
75int udl_modeset_init(struct drm_device *dev);
76struct drm_connector *udl_connector_init(struct drm_device *dev);
77
78struct urb *udl_get_urb(struct drm_device *dev);
79
80int udl_submit_urb(struct drm_device *dev, struct urb *urb, size_t len);
81void udl_urb_completion(struct urb *urb);
82
83int udl_init(struct udl_device *udl);
84
85int udl_render_hline(struct drm_device *dev, int log_bpp, struct urb **urb_ptr,
86 const char *front, char **urb_buf_ptr,
87 u32 byte_offset, u32 device_byte_offset, u32 byte_width);
88
89int udl_drop_usb(struct drm_device *dev);
90
91#define CMD_WRITE_RAW8 "\xAF\x60" /**< 8 bit raw write command. */
92#define CMD_WRITE_RL8 "\xAF\x61" /**< 8 bit run length command. */
93#define CMD_WRITE_COPY8 "\xAF\x62" /**< 8 bit copy command. */
94#define CMD_WRITE_RLX8 "\xAF\x63" /**< 8 bit extended run length command. */
95
96#define CMD_WRITE_RAW16 "\xAF\x68" /**< 16 bit raw write command. */
97#define CMD_WRITE_RL16 "\xAF\x69" /**< 16 bit run length command. */
98#define CMD_WRITE_COPY16 "\xAF\x6A" /**< 16 bit copy command. */
99#define CMD_WRITE_RLX16 "\xAF\x6B" /**< 16 bit extended run length command. */
100
101/* On/Off for driving the DisplayLink framebuffer to the display */
102#define UDL_REG_BLANK_MODE 0x1f
103
104#define UDL_BLANK_MODE_ON 0x00 /* hsync and vsync on, visible */
105#define UDL_BLANK_MODE_BLANKED 0x01 /* hsync and vsync on, blanked */
106#define UDL_BLANK_MODE_VSYNC_OFF 0x03 /* vsync off, blanked */
107#define UDL_BLANK_MODE_HSYNC_OFF 0x05 /* hsync off, blanked */
108#define UDL_BLANK_MODE_POWERDOWN 0x07 /* powered off; requires modeset */
109
110#endif