drivers/gpu/drm/udl/udl_drv.h

   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 delayed_work release_urb_work;
  38         struct urb *urb;
  39 };
  40
  41 struct 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
  50 struct udl_device {
  51         struct drm_device drm;
  52         struct device *dev;
  53
  54         struct drm_simple_display_pipe display_pipe;
  55
  56         struct mutex gem_lock;
  57
  58         int sku_pixel_limit;
  59
  60         struct urb_list urbs;
  61
  62         char mode_buf[1024];
  63         uint32_t mode_buf_len;
  64 };
  65
  66 #define to_udl(x) container_of(x, struct udl_device, drm)
  67
  68 static inline struct usb_device *udl_to_usb_device(struct udl_device *udl)
  69 {
  70         return interface_to_usbdev(to_usb_interface(udl->drm.dev));
  71 }
  72
  73 /* modeset */
  74 int udl_modeset_init(struct drm_device *dev);
  75 struct drm_connector *udl_connector_init(struct drm_device *dev);
  76
  77 struct urb *udl_get_urb(struct drm_device *dev);
  78
  79 int udl_submit_urb(struct drm_device *dev, struct urb *urb, size_t len);
  80 void udl_urb_completion(struct urb *urb);
  81
  82 int udl_init(struct udl_device *udl);
  83
  84 int udl_render_hline(struct drm_device *dev, int log_bpp, struct urb **urb_ptr,
  85                      const char *front, char **urb_buf_ptr,
  86                      u32 byte_offset, u32 device_byte_offset, u32 byte_width);
  87
  88 int udl_drop_usb(struct drm_device *dev);
  89
  90 #define CMD_WRITE_RAW8   "\xAF\x60" /**< 8 bit raw write command. */
  91 #define CMD_WRITE_RL8    "\xAF\x61" /**< 8 bit run length command. */
  92 #define CMD_WRITE_COPY8  "\xAF\x62" /**< 8 bit copy command. */
  93 #define CMD_WRITE_RLX8   "\xAF\x63" /**< 8 bit extended run length command. */
  94
  95 #define CMD_WRITE_RAW16  "\xAF\x68" /**< 16 bit raw write command. */
  96 #define CMD_WRITE_RL16   "\xAF\x69" /**< 16 bit run length command. */
  97 #define CMD_WRITE_COPY16 "\xAF\x6A" /**< 16 bit copy command. */
  98 #define CMD_WRITE_RLX16  "\xAF\x6B" /**< 16 bit extended run length command. */
  99
 100 /* On/Off for driving the DisplayLink framebuffer to the display */
 101 #define UDL_REG_BLANK_MODE              0x1f
 102
 103 #define UDL_BLANK_MODE_ON               0x00 /* hsync and vsync on, visible */
 104 #define UDL_BLANK_MODE_BLANKED          0x01 /* hsync and vsync on, blanked */
 105 #define UDL_BLANK_MODE_VSYNC_OFF        0x03 /* vsync off, blanked */
 106 #define UDL_BLANK_MODE_HSYNC_OFF        0x05 /* hsync off, blanked */
 107 #define UDL_BLANK_MODE_POWERDOWN        0x07 /* powered off; requires modeset */
 108
 109 #endif