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
25 struct drm_mode_create_dumb;
26
27 #define DRIVER_NAME "udl"
28 #define DRIVER_DESC "DisplayLink"
29
30 #define DRIVER_MAJOR 0
31 #define DRIVER_MINOR 0
32 #define DRIVER_PATCHLEVEL 1
33
34 struct udl_device;
35
36 struct urb_node {
37 struct list_head entry;
38 struct udl_device *dev;
39 struct urb *urb;
40 };
41
42 struct urb_list {
43 struct list_head list;
44 spinlock_t lock;
45 wait_queue_head_t sleep;
46 int available;
47 int count;
48 size_t size;
49 };
50
51 struct udl_device {
52 struct drm_device drm;
53
54 unsigned long sku_pixel_limit;
55
56 struct drm_plane primary_plane;
57 struct drm_crtc crtc;
58 struct drm_encoder encoder;
59 struct drm_connector connector;
60
61 struct urb_list urbs;
62 };
63
64 #define to_udl(x) container_of(x, struct udl_device, drm)
65
udl_to_usb_device(struct udl_device * udl)66 static inline struct usb_device *udl_to_usb_device(struct udl_device *udl)
67 {
68 return interface_to_usbdev(to_usb_interface(udl->drm.dev));
69 }
70
71 /* modeset */
72 int udl_modeset_init(struct udl_device *udl);
73 struct drm_connector *udl_connector_init(struct drm_device *dev);
74
75 struct urb *udl_get_urb(struct udl_device *udl);
76
77 int udl_submit_urb(struct udl_device *udl, struct urb *urb, size_t len);
78 void udl_sync_pending_urbs(struct udl_device *udl);
79 void udl_urb_completion(struct urb *urb);
80
81 int udl_init(struct udl_device *udl);
82
83 int udl_render_hline(struct udl_device *udl, int log_bpp, struct urb **urb_ptr,
84 const char *front, char **urb_buf_ptr,
85 u32 byte_offset, u32 device_byte_offset, u32 byte_width);
86
87 int udl_drop_usb(struct udl_device *udl);
88 int udl_select_std_channel(struct udl_device *udl);
89
90 #endif
91