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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_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#define DRIVER_DATE "20120220"
30
31#define DRIVER_MAJOR 0
32#define DRIVER_MINOR 0
33#define DRIVER_PATCHLEVEL 1
34
35struct udl_device;
36
37struct urb_node {
38 struct list_head entry;
39 struct udl_device *dev;
40 struct urb *urb;
41};
42
43struct 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
52struct udl_device {
53 struct drm_device drm;
54 struct device *dev;
55 struct device *dmadev;
56
57 struct drm_plane primary_plane;
58 struct drm_crtc crtc;
59 struct drm_encoder encoder;
60 struct drm_connector connector;
61
62 struct mutex gem_lock;
63
64 int sku_pixel_limit;
65
66 struct urb_list urbs;
67};
68
69#define to_udl(x) container_of(x, struct udl_device, drm)
70
71static inline struct usb_device *udl_to_usb_device(struct udl_device *udl)
72{
73 return interface_to_usbdev(to_usb_interface(udl->drm.dev));
74}
75
76/* modeset */
77int udl_modeset_init(struct drm_device *dev);
78struct drm_connector *udl_connector_init(struct drm_device *dev);
79
80struct urb *udl_get_urb(struct drm_device *dev);
81
82int udl_submit_urb(struct drm_device *dev, struct urb *urb, size_t len);
83void udl_sync_pending_urbs(struct drm_device *dev);
84void udl_urb_completion(struct urb *urb);
85
86int udl_init(struct udl_device *udl);
87
88int udl_render_hline(struct drm_device *dev, int log_bpp, struct urb **urb_ptr,
89 const char *front, char **urb_buf_ptr,
90 u32 byte_offset, u32 device_byte_offset, u32 byte_width);
91
92int udl_drop_usb(struct drm_device *dev);
93int udl_select_std_channel(struct udl_device *udl);
94
95#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 usb_device *udev;
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
69/* modeset */
70int udl_modeset_init(struct drm_device *dev);
71struct drm_connector *udl_connector_init(struct drm_device *dev);
72
73struct urb *udl_get_urb(struct drm_device *dev);
74
75int udl_submit_urb(struct drm_device *dev, struct urb *urb, size_t len);
76void udl_urb_completion(struct urb *urb);
77
78int udl_init(struct udl_device *udl);
79
80int udl_render_hline(struct drm_device *dev, int log_bpp, struct urb **urb_ptr,
81 const char *front, char **urb_buf_ptr,
82 u32 byte_offset, u32 device_byte_offset, u32 byte_width);
83
84int udl_drop_usb(struct drm_device *dev);
85
86#define CMD_WRITE_RAW8 "\xAF\x60" /**< 8 bit raw write command. */
87#define CMD_WRITE_RL8 "\xAF\x61" /**< 8 bit run length command. */
88#define CMD_WRITE_COPY8 "\xAF\x62" /**< 8 bit copy command. */
89#define CMD_WRITE_RLX8 "\xAF\x63" /**< 8 bit extended run length command. */
90
91#define CMD_WRITE_RAW16 "\xAF\x68" /**< 16 bit raw write command. */
92#define CMD_WRITE_RL16 "\xAF\x69" /**< 16 bit run length command. */
93#define CMD_WRITE_COPY16 "\xAF\x6A" /**< 16 bit copy command. */
94#define CMD_WRITE_RLX16 "\xAF\x6B" /**< 16 bit extended run length command. */
95
96/* On/Off for driving the DisplayLink framebuffer to the display */
97#define UDL_REG_BLANK_MODE 0x1f
98
99#define UDL_BLANK_MODE_ON 0x00 /* hsync and vsync on, visible */
100#define UDL_BLANK_MODE_BLANKED 0x01 /* hsync and vsync on, blanked */
101#define UDL_BLANK_MODE_VSYNC_OFF 0x03 /* vsync off, blanked */
102#define UDL_BLANK_MODE_HSYNC_OFF 0x05 /* hsync off, blanked */
103#define UDL_BLANK_MODE_POWERDOWN 0x07 /* powered off; requires modeset */
104
105#endif