1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * Copyright (C) 2012 Red Hat
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>
14 #include <linux/mm_types.h>
15 #include <linux/usb.h>
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>
22 struct drm_mode_create_dumb;
24 #define DRIVER_NAME "udl"
25 #define DRIVER_DESC "DisplayLink"
26 #define DRIVER_DATE "20120220"
28 #define DRIVER_MAJOR 0
29 #define DRIVER_MINOR 0
30 #define DRIVER_PATCHLEVEL 1
35 struct list_head entry;
36 struct udl_device *dev;
37 struct delayed_work release_urb_work;
42 struct list_head list;
44 struct semaphore limit_sem;
51 struct drm_device drm;
53 struct usb_device *udev;
55 struct drm_simple_display_pipe display_pipe;
57 /* active framebuffer on the 16-bit channel */
58 const struct drm_framebuffer *active_fb_16;
59 spinlock_t active_fb_16_lock;
61 struct mutex gem_lock;
68 uint32_t mode_buf_len;
71 #define to_udl(x) container_of(x, struct udl_device, drm)
74 int udl_modeset_init(struct drm_device *dev);
75 void udl_modeset_cleanup(struct drm_device *dev);
76 struct drm_connector *udl_connector_init(struct drm_device *dev);
78 struct urb *udl_get_urb(struct drm_device *dev);
80 int udl_submit_urb(struct drm_device *dev, struct urb *urb, size_t len);
81 void udl_urb_completion(struct urb *urb);
83 int udl_init(struct udl_device *udl);
84 void udl_fini(struct drm_device *dev);
86 int udl_render_hline(struct drm_device *dev, int log_bpp, struct urb **urb_ptr,
87 const char *front, char **urb_buf_ptr,
88 u32 byte_offset, u32 device_byte_offset, u32 byte_width);
90 struct drm_gem_object *udl_driver_gem_create_object(struct drm_device *dev,
93 int udl_handle_damage(struct drm_framebuffer *fb, int x, int y,
94 int width, int height);
96 int udl_drop_usb(struct drm_device *dev);
98 #define CMD_WRITE_RAW8 "\xAF\x60" /**< 8 bit raw write command. */
99 #define CMD_WRITE_RL8 "\xAF\x61" /**< 8 bit run length command. */
100 #define CMD_WRITE_COPY8 "\xAF\x62" /**< 8 bit copy command. */
101 #define CMD_WRITE_RLX8 "\xAF\x63" /**< 8 bit extended run length command. */
103 #define CMD_WRITE_RAW16 "\xAF\x68" /**< 16 bit raw write command. */
104 #define CMD_WRITE_RL16 "\xAF\x69" /**< 16 bit run length command. */
105 #define CMD_WRITE_COPY16 "\xAF\x6A" /**< 16 bit copy command. */
106 #define CMD_WRITE_RLX16 "\xAF\x6B" /**< 16 bit extended run length command. */
108 /* On/Off for driving the DisplayLink framebuffer to the display */
109 #define UDL_REG_BLANK_MODE 0x1f
111 #define UDL_BLANK_MODE_ON 0x00 /* hsync and vsync on, visible */
112 #define UDL_BLANK_MODE_BLANKED 0x01 /* hsync and vsync on, blanked */
113 #define UDL_BLANK_MODE_VSYNC_OFF 0x03 /* vsync off, blanked */
114 #define UDL_BLANK_MODE_HSYNC_OFF 0x05 /* hsync off, blanked */
115 #define UDL_BLANK_MODE_POWERDOWN 0x07 /* powered off; requires modeset */