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 #define DRIVER_DATE "20120220"
30
31 #define DRIVER_MAJOR 0
32 #define DRIVER_MINOR 0
33 #define DRIVER_PATCHLEVEL 1
34
35 struct udl_device;
36
37 struct urb_node {
38 struct list_head entry;
39 struct udl_device *dev;
40 struct urb *urb;
41 };
42
43 struct 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
52 struct udl_connector {
53 struct drm_connector connector;
54 /* last udl_detect edid */
55 struct edid *edid;
56 };
57
to_udl_connector(struct drm_connector * connector)58 static inline struct udl_connector *to_udl_connector(struct drm_connector *connector)
59 {
60 return container_of(connector, struct udl_connector, connector);
61 }
62
63 struct udl_device {
64 struct drm_device drm;
65 struct device *dev;
66 struct device *dmadev;
67
68 struct drm_plane primary_plane;
69 struct drm_crtc crtc;
70 struct drm_encoder encoder;
71
72 struct mutex gem_lock;
73
74 int sku_pixel_limit;
75
76 struct urb_list urbs;
77 };
78
79 #define to_udl(x) container_of(x, struct udl_device, drm)
80
udl_to_usb_device(struct udl_device * udl)81 static inline struct usb_device *udl_to_usb_device(struct udl_device *udl)
82 {
83 return interface_to_usbdev(to_usb_interface(udl->drm.dev));
84 }
85
86 /* modeset */
87 int udl_modeset_init(struct drm_device *dev);
88 struct drm_connector *udl_connector_init(struct drm_device *dev);
89
90 struct urb *udl_get_urb(struct drm_device *dev);
91
92 int udl_submit_urb(struct drm_device *dev, struct urb *urb, size_t len);
93 void udl_sync_pending_urbs(struct drm_device *dev);
94 void udl_urb_completion(struct urb *urb);
95
96 int udl_init(struct udl_device *udl);
97
98 int udl_render_hline(struct drm_device *dev, int log_bpp, struct urb **urb_ptr,
99 const char *front, char **urb_buf_ptr,
100 u32 byte_offset, u32 device_byte_offset, u32 byte_width);
101
102 int udl_drop_usb(struct drm_device *dev);
103 int udl_select_std_channel(struct udl_device *udl);
104
105 #endif
106