xref: /openbmc/linux/drivers/gpu/drm/udl/udl_drv.h (revision 801543b2)
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 
22 struct 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 
32 struct udl_device;
33 
34 struct urb_node {
35 	struct list_head entry;
36 	struct udl_device *dev;
37 	struct urb *urb;
38 };
39 
40 struct urb_list {
41 	struct list_head list;
42 	struct list_head in_flight;
43 	spinlock_t lock;
44 	wait_queue_head_t sleep;
45 	int available;
46 	int count;
47 	size_t size;
48 };
49 
50 struct udl_device {
51 	struct drm_device drm;
52 	struct device *dev;
53 	struct device *dmadev;
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 static inline struct usb_device *udl_to_usb_device(struct udl_device *udl)
70 {
71 	return interface_to_usbdev(to_usb_interface(udl->drm.dev));
72 }
73 
74 /* modeset */
75 int udl_modeset_init(struct drm_device *dev);
76 struct drm_connector *udl_connector_init(struct drm_device *dev);
77 
78 struct urb *udl_get_urb_timeout(struct drm_device *dev, long timeout);
79 
80 #define GET_URB_TIMEOUT	HZ
81 static inline struct urb *udl_get_urb(struct drm_device *dev)
82 {
83 	return udl_get_urb_timeout(dev, GET_URB_TIMEOUT);
84 }
85 
86 int udl_submit_urb(struct drm_device *dev, struct urb *urb, size_t len);
87 int udl_sync_pending_urbs(struct drm_device *dev);
88 void udl_kill_pending_urbs(struct drm_device *dev);
89 void udl_urb_completion(struct urb *urb);
90 
91 int udl_init(struct udl_device *udl);
92 
93 int udl_render_hline(struct drm_device *dev, int log_bpp, struct urb **urb_ptr,
94 		     const char *front, char **urb_buf_ptr,
95 		     u32 byte_offset, u32 device_byte_offset, u32 byte_width);
96 
97 int udl_drop_usb(struct drm_device *dev);
98 
99 #define CMD_WRITE_RAW8   "\xAF\x60" /**< 8 bit raw write command. */
100 #define CMD_WRITE_RL8    "\xAF\x61" /**< 8 bit run length command. */
101 #define CMD_WRITE_COPY8  "\xAF\x62" /**< 8 bit copy command. */
102 #define CMD_WRITE_RLX8   "\xAF\x63" /**< 8 bit extended run length command. */
103 
104 #define CMD_WRITE_RAW16  "\xAF\x68" /**< 16 bit raw write command. */
105 #define CMD_WRITE_RL16   "\xAF\x69" /**< 16 bit run length command. */
106 #define CMD_WRITE_COPY16 "\xAF\x6A" /**< 16 bit copy command. */
107 #define CMD_WRITE_RLX16  "\xAF\x6B" /**< 16 bit extended run length command. */
108 
109 /* On/Off for driving the DisplayLink framebuffer to the display */
110 #define UDL_REG_BLANK_MODE		0x1f
111 
112 #define UDL_BLANK_MODE_ON		0x00 /* hsync and vsync on, visible */
113 #define UDL_BLANK_MODE_BLANKED		0x01 /* hsync and vsync on, blanked */
114 #define UDL_BLANK_MODE_VSYNC_OFF	0x03 /* vsync off, blanked */
115 #define UDL_BLANK_MODE_HSYNC_OFF	0x05 /* hsync off, blanked */
116 #define UDL_BLANK_MODE_POWERDOWN	0x07 /* powered off; requires modeset */
117 
118 #endif
119