udl_drv.h

 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
30#define DRIVER_MAJOR		0
31#define DRIVER_MINOR		0
32#define DRIVER_PATCHLEVEL	1
33
34struct udl_device;
35
36struct urb_node {
37	struct list_head entry;
38	struct udl_device *dev;
39	struct urb *urb;
40};
41
42struct 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
51struct 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
66static 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 */
72int udl_modeset_init(struct udl_device *udl);
73struct drm_connector *udl_connector_init(struct drm_device *dev);
74
75struct urb *udl_get_urb(struct udl_device *udl);
76
77int udl_submit_urb(struct udl_device *udl, struct urb *urb, size_t len);
78void udl_sync_pending_urbs(struct udl_device *udl);
79void udl_urb_completion(struct urb *urb);
80
81int udl_init(struct udl_device *udl);
82
83int 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
87int udl_drop_usb(struct udl_device *udl);
88int udl_select_std_channel(struct udl_device *udl);
89
90#endif