LXR linux/drivers/gpu/drm/udl/udl

   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
  22struct 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
  32struct udl_device;
  33
  34struct 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
  41struct 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
  50struct udl_device {
  51        struct drm_device drm;
  52        struct device *dev;
  53        struct usb_device *udev;
  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/* modeset */
  70int udl_modeset_init(struct drm_device *dev);
  71struct drm_connector *udl_connector_init(struct drm_device *dev);
  72
  73struct urb *udl_get_urb(struct drm_device *dev);
  74
  75int udl_submit_urb(struct drm_device *dev, struct urb *urb, size_t len);
  76void udl_urb_completion(struct urb *urb);
  77
  78int udl_init(struct udl_device *udl);
  79
  80int udl_render_hline(struct drm_device *dev, int log_bpp, struct urb **urb_ptr,
  81                     const char *front, char **urb_buf_ptr,
  82                     u32 byte_offset, u32 device_byte_offset, u32 byte_width);
  83
  84int udl_drop_usb(struct drm_device *dev);
  85
  86#define CMD_WRITE_RAW8   "\xAF\x60" /**< 8 bit raw write command. */
  87#define CMD_WRITE_RL8    "\xAF\x61" /**< 8 bit run length command. */
  88#define CMD_WRITE_COPY8  "\xAF\x62" /**< 8 bit copy command. */
  89#define CMD_WRITE_RLX8   "\xAF\x63" /**< 8 bit extended run length command. */
  90
  91#define CMD_WRITE_RAW16  "\xAF\x68" /**< 16 bit raw write command. */
  92#define CMD_WRITE_RL16   "\xAF\x69" /**< 16 bit run length command. */
  93#define CMD_WRITE_COPY16 "\xAF\x6A" /**< 16 bit copy command. */
  94#define CMD_WRITE_RLX16  "\xAF\x6B" /**< 16 bit extended run length command. */
  95
  96/* On/Off for driving the DisplayLink framebuffer to the display */
  97#define UDL_REG_BLANK_MODE              0x1f
  98
  99#define UDL_BLANK_MODE_ON               0x00 /* hsync and vsync on, visible */
 100#define UDL_BLANK_MODE_BLANKED          0x01 /* hsync and vsync on, blanked */
 101#define UDL_BLANK_MODE_VSYNC_OFF        0x03 /* vsync off, blanked */
 102#define UDL_BLANK_MODE_HSYNC_OFF        0x05 /* hsync off, blanked */
 103#define UDL_BLANK_MODE_POWERDOWN        0x07 /* powered off; requires modeset */
 104
 105#endif
 106