2 * Copyright (C) 2012 Red Hat
4 * based in parts on udlfb.c:
5 * Copyright (C) 2009 Roberto De Ioris <roberto@unbit.it>
6 * Copyright (C) 2009 Jaya Kumar <jayakumar.lkml@gmail.com>
7 * Copyright (C) 2009 Bernie Thompson <bernie@plugable.com>
9 * This file is subject to the terms and conditions of the GNU General Public
10 * License v2. See the file COPYING in the main directory of this archive for
17 #include <linux/usb.h>
18 #include <drm/drm_gem.h>
20 #define DRIVER_NAME "udl"
21 #define DRIVER_DESC "DisplayLink"
22 #define DRIVER_DATE "20120220"
24 #define DRIVER_MAJOR 0
25 #define DRIVER_MINOR 0
26 #define DRIVER_PATCHLEVEL 1
28 #define UDL_BO_CACHEABLE (1 << 0)
29 #define UDL_BO_WC (1 << 1)
34 struct list_head entry
;
35 struct udl_device
*dev
;
36 struct delayed_work release_urb_work
;
41 struct list_head list
;
43 struct semaphore limit_sem
;
52 struct drm_device drm
;
54 struct usb_device
*udev
;
55 struct drm_crtc
*crtc
;
60 atomic_t lost_pixels
; /* 1 = a render op failed. Need screen refresh */
62 struct udl_fbdev
*fbdev
;
64 uint32_t mode_buf_len
;
65 atomic_t bytes_rendered
; /* raw pixel-bytes driver asked to render */
66 atomic_t bytes_identical
; /* saved effort with backbuffer comparison */
67 atomic_t bytes_sent
; /* to usb, after compression including overhead */
68 atomic_t cpu_kcycles_used
; /* transpired during pixel processing */
71 #define to_udl(x) container_of(x, struct udl_device, drm)
73 struct udl_gem_object
{
74 struct drm_gem_object base
;
81 #define to_udl_bo(x) container_of(x, struct udl_gem_object, base)
83 struct udl_framebuffer
{
84 struct drm_framebuffer base
;
85 struct udl_gem_object
*obj
;
86 bool active_16
; /* active on the 16-bit channel */
89 #define to_udl_fb(x) container_of(x, struct udl_framebuffer, base)
92 int udl_modeset_init(struct drm_device
*dev
);
93 void udl_modeset_restore(struct drm_device
*dev
);
94 void udl_modeset_cleanup(struct drm_device
*dev
);
95 int udl_connector_init(struct drm_device
*dev
, struct drm_encoder
*encoder
);
97 struct drm_encoder
*udl_encoder_init(struct drm_device
*dev
);
99 struct urb
*udl_get_urb(struct drm_device
*dev
);
101 int udl_submit_urb(struct drm_device
*dev
, struct urb
*urb
, size_t len
);
102 void udl_urb_completion(struct urb
*urb
);
104 int udl_init(struct udl_device
*udl
);
105 void udl_fini(struct drm_device
*dev
);
107 int udl_fbdev_init(struct drm_device
*dev
);
108 void udl_fbdev_cleanup(struct drm_device
*dev
);
109 void udl_fbdev_unplug(struct drm_device
*dev
);
110 struct drm_framebuffer
*
111 udl_fb_user_fb_create(struct drm_device
*dev
,
112 struct drm_file
*file
,
113 const struct drm_mode_fb_cmd2
*mode_cmd
);
115 int udl_render_hline(struct drm_device
*dev
, int log_bpp
, struct urb
**urb_ptr
,
116 const char *front
, char **urb_buf_ptr
,
117 u32 byte_offset
, u32 device_byte_offset
, u32 byte_width
,
118 int *ident_ptr
, int *sent_ptr
);
120 int udl_dumb_create(struct drm_file
*file_priv
,
121 struct drm_device
*dev
,
122 struct drm_mode_create_dumb
*args
);
123 int udl_gem_mmap(struct drm_file
*file_priv
, struct drm_device
*dev
,
124 uint32_t handle
, uint64_t *offset
);
126 void udl_gem_free_object(struct drm_gem_object
*gem_obj
);
127 struct udl_gem_object
*udl_gem_alloc_object(struct drm_device
*dev
,
129 struct dma_buf
*udl_gem_prime_export(struct drm_device
*dev
,
130 struct drm_gem_object
*obj
, int flags
);
131 struct drm_gem_object
*udl_gem_prime_import(struct drm_device
*dev
,
132 struct dma_buf
*dma_buf
);
134 int udl_gem_get_pages(struct udl_gem_object
*obj
);
135 void udl_gem_put_pages(struct udl_gem_object
*obj
);
136 int udl_gem_vmap(struct udl_gem_object
*obj
);
137 void udl_gem_vunmap(struct udl_gem_object
*obj
);
138 int udl_drm_gem_mmap(struct file
*filp
, struct vm_area_struct
*vma
);
139 int udl_gem_fault(struct vm_fault
*vmf
);
141 int udl_handle_damage(struct udl_framebuffer
*fb
, int x
, int y
,
142 int width
, int height
);
144 int udl_drop_usb(struct drm_device
*dev
);
146 #define CMD_WRITE_RAW8 "\xAF\x60" /**< 8 bit raw write command. */
147 #define CMD_WRITE_RL8 "\xAF\x61" /**< 8 bit run length command. */
148 #define CMD_WRITE_COPY8 "\xAF\x62" /**< 8 bit copy command. */
149 #define CMD_WRITE_RLX8 "\xAF\x63" /**< 8 bit extended run length command. */
151 #define CMD_WRITE_RAW16 "\xAF\x68" /**< 16 bit raw write command. */
152 #define CMD_WRITE_RL16 "\xAF\x69" /**< 16 bit run length command. */
153 #define CMD_WRITE_COPY16 "\xAF\x6A" /**< 16 bit copy command. */
154 #define CMD_WRITE_RLX16 "\xAF\x6B" /**< 16 bit extended run length command. */