tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
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
54 struct drm_simple_display_pipe display_pipe;
55
56 struct mutex gem_lock;
57
58 int sku_pixel_limit;
59
60 struct urb_list urbs;
61
62 char mode_buf[1024];
63 uint32_t mode_buf_len;
64};
65
66#define to_udl(x) container_of(x, struct udl_device, drm)
67
68static inline struct usb_device *udl_to_usb_device(struct udl_device *udl)
69{
70 return interface_to_usbdev(to_usb_interface(udl->drm.dev));
71}
72
73/* modeset */
74int udl_modeset_init(struct drm_device *dev);
75struct drm_connector *udl_connector_init(struct drm_device *dev);
76
77struct urb *udl_get_urb(struct drm_device *dev);
78
79int udl_submit_urb(struct drm_device *dev, struct urb *urb, size_t len);
80void udl_urb_completion(struct urb *urb);
81
82int udl_init(struct udl_device *udl);
83
84int udl_render_hline(struct drm_device *dev, int log_bpp, struct urb **urb_ptr,
85 const char *front, char **urb_buf_ptr,
86 u32 byte_offset, u32 device_byte_offset, u32 byte_width);
87
88int udl_drop_usb(struct drm_device *dev);
89
90#define CMD_WRITE_RAW8 "\xAF\x60" /**< 8 bit raw write command. */
91#define CMD_WRITE_RL8 "\xAF\x61" /**< 8 bit run length command. */
92#define CMD_WRITE_COPY8 "\xAF\x62" /**< 8 bit copy command. */
93#define CMD_WRITE_RLX8 "\xAF\x63" /**< 8 bit extended run length command. */
94
95#define CMD_WRITE_RAW16 "\xAF\x68" /**< 16 bit raw write command. */
96#define CMD_WRITE_RL16 "\xAF\x69" /**< 16 bit run length command. */
97#define CMD_WRITE_COPY16 "\xAF\x6A" /**< 16 bit copy command. */
98#define CMD_WRITE_RLX16 "\xAF\x6B" /**< 16 bit extended run length command. */
99
100/* On/Off for driving the DisplayLink framebuffer to the display */
101#define UDL_REG_BLANK_MODE 0x1f
102
103#define UDL_BLANK_MODE_ON 0x00 /* hsync and vsync on, visible */
104#define UDL_BLANK_MODE_BLANKED 0x01 /* hsync and vsync on, blanked */
105#define UDL_BLANK_MODE_VSYNC_OFF 0x03 /* vsync off, blanked */
106#define UDL_BLANK_MODE_HSYNC_OFF 0x05 /* hsync off, blanked */
107#define UDL_BLANK_MODE_POWERDOWN 0x07 /* powered off; requires modeset */
108
109#endif