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>
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
32 #define UDL_BO_CACHEABLE (1 << 0)
33 #define UDL_BO_WC (1 << 1)
38 struct list_head entry;
39 struct udl_device *dev;
40 struct delayed_work release_urb_work;
45 struct list_head list;
47 struct semaphore limit_sem;
56 struct drm_device drm;
58 struct usb_device *udev;
59 struct drm_crtc *crtc;
61 struct mutex gem_lock;
66 atomic_t lost_pixels; /* 1 = a render op failed. Need screen refresh */
68 struct udl_fbdev *fbdev;
70 uint32_t mode_buf_len;
71 atomic_t bytes_rendered; /* raw pixel-bytes driver asked to render */
72 atomic_t bytes_identical; /* saved effort with backbuffer comparison */
73 atomic_t bytes_sent; /* to usb, after compression including overhead */
74 atomic_t cpu_kcycles_used; /* transpired during pixel processing */
77 #define to_udl(x) container_of(x, struct udl_device, drm)
79 struct udl_gem_object {
80 struct drm_gem_object base;
87 #define to_udl_bo(x) container_of(x, struct udl_gem_object, base)
89 struct udl_framebuffer {
90 struct drm_framebuffer base;
91 struct udl_gem_object *obj;
92 bool active_16; /* active on the 16-bit channel */
95 #define to_udl_fb(x) container_of(x, struct udl_framebuffer, base)
98 int udl_modeset_init(struct drm_device *dev);
99 void udl_modeset_restore(struct drm_device *dev);
100 void udl_modeset_cleanup(struct drm_device *dev);
101 int udl_connector_init(struct drm_device *dev, struct drm_encoder *encoder);
103 struct drm_encoder *udl_encoder_init(struct drm_device *dev);
105 struct urb *udl_get_urb(struct drm_device *dev);
107 int udl_submit_urb(struct drm_device *dev, struct urb *urb, size_t len);
108 void udl_urb_completion(struct urb *urb);
110 int udl_init(struct udl_device *udl);
111 void udl_fini(struct drm_device *dev);
113 int udl_fbdev_init(struct drm_device *dev);
114 void udl_fbdev_cleanup(struct drm_device *dev);
115 void udl_fbdev_unplug(struct drm_device *dev);
116 struct drm_framebuffer *
117 udl_fb_user_fb_create(struct drm_device *dev,
118 struct drm_file *file,
119 const struct drm_mode_fb_cmd2 *mode_cmd);
121 int udl_render_hline(struct drm_device *dev, int log_bpp, struct urb **urb_ptr,
122 const char *front, char **urb_buf_ptr,
123 u32 byte_offset, u32 device_byte_offset, u32 byte_width,
124 int *ident_ptr, int *sent_ptr);
126 int udl_dumb_create(struct drm_file *file_priv,
127 struct drm_device *dev,
128 struct drm_mode_create_dumb *args);
129 int udl_gem_mmap(struct drm_file *file_priv, struct drm_device *dev,
130 uint32_t handle, uint64_t *offset);
132 void udl_gem_free_object(struct drm_gem_object *gem_obj);
133 struct udl_gem_object *udl_gem_alloc_object(struct drm_device *dev,
135 struct dma_buf *udl_gem_prime_export(struct drm_gem_object *obj, int flags);
136 struct drm_gem_object *udl_gem_prime_import(struct drm_device *dev,
137 struct dma_buf *dma_buf);
139 int udl_gem_get_pages(struct udl_gem_object *obj);
140 void udl_gem_put_pages(struct udl_gem_object *obj);
141 int udl_gem_vmap(struct udl_gem_object *obj);
142 void udl_gem_vunmap(struct udl_gem_object *obj);
143 int udl_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
144 vm_fault_t udl_gem_fault(struct vm_fault *vmf);
146 int udl_handle_damage(struct udl_framebuffer *fb, int x, int y,
147 int width, int height);
149 int udl_drop_usb(struct drm_device *dev);
151 #define CMD_WRITE_RAW8 "\xAF\x60" /**< 8 bit raw write command. */
152 #define CMD_WRITE_RL8 "\xAF\x61" /**< 8 bit run length command. */
153 #define CMD_WRITE_COPY8 "\xAF\x62" /**< 8 bit copy command. */
154 #define CMD_WRITE_RLX8 "\xAF\x63" /**< 8 bit extended run length command. */
156 #define CMD_WRITE_RAW16 "\xAF\x68" /**< 16 bit raw write command. */
157 #define CMD_WRITE_RL16 "\xAF\x69" /**< 16 bit run length command. */
158 #define CMD_WRITE_COPY16 "\xAF\x6A" /**< 16 bit copy command. */
159 #define CMD_WRITE_RLX16 "\xAF\x6B" /**< 16 bit extended run length command. */