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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (C) 2012 Red Hat
*
* based in parts on udlfb.c:
* Copyright (C) 2009 Roberto De Ioris <roberto@unbit.it>
* Copyright (C) 2009 Jaya Kumar <jayakumar.lkml@gmail.com>
* Copyright (C) 2009 Bernie Thompson <bernie@plugable.com>
*/
#ifndef UDL_DRV_H
#define UDL_DRV_H
#include <linux/mm_types.h>
#include <linux/usb.h>
#include <drm/drm_device.h>
#include <drm/drm_framebuffer.h>
#include <drm/drm_gem.h>
struct drm_encoder;
struct drm_mode_create_dumb;
#define DRIVER_NAME "udl"
#define DRIVER_DESC "DisplayLink"
#define DRIVER_DATE "20120220"
#define DRIVER_MAJOR 0
#define DRIVER_MINOR 0
#define DRIVER_PATCHLEVEL 1
struct udl_device;
struct urb_node {
struct list_head entry;
struct udl_device *dev;
struct delayed_work release_urb_work;
struct urb *urb;
};
struct urb_list {
struct list_head list;
spinlock_t lock;
struct semaphore limit_sem;
int available;
int count;
size_t size;
};
struct udl_device {
struct drm_device drm;
struct device *dev;
struct usb_device *udev;
struct drm_crtc *crtc;
/* active framebuffer on the 16-bit channel */
const struct drm_framebuffer *active_fb_16;
spinlock_t active_fb_16_lock;
struct mutex gem_lock;
int sku_pixel_limit;
struct urb_list urbs;
atomic_t lost_pixels; /* 1 = a render op failed. Need screen refresh */
char mode_buf[1024];
uint32_t mode_buf_len;
atomic_t bytes_rendered; /* raw pixel-bytes driver asked to render */
atomic_t bytes_identical; /* saved effort with backbuffer comparison */
atomic_t bytes_sent; /* to usb, after compression including overhead */
atomic_t cpu_kcycles_used; /* transpired during pixel processing */
};
#define to_udl(x) container_of(x, struct udl_device, drm)
struct udl_framebuffer {
struct drm_framebuffer base;
struct drm_gem_shmem_object *shmem;
};
#define to_udl_fb(x) container_of(x, struct udl_framebuffer, base)
/* modeset */
int udl_modeset_init(struct drm_device *dev);
void udl_modeset_restore(struct drm_device *dev);
void udl_modeset_cleanup(struct drm_device *dev);
int udl_connector_init(struct drm_device *dev, struct drm_encoder *encoder);
struct drm_encoder *udl_encoder_init(struct drm_device *dev);
struct urb *udl_get_urb(struct drm_device *dev);
int udl_submit_urb(struct drm_device *dev, struct urb *urb, size_t len);
void udl_urb_completion(struct urb *urb);
int udl_init(struct udl_device *udl);
void udl_fini(struct drm_device *dev);
struct drm_framebuffer *
udl_fb_user_fb_create(struct drm_device *dev,
struct drm_file *file,
const struct drm_mode_fb_cmd2 *mode_cmd);
int udl_render_hline(struct drm_device *dev, int log_bpp, struct urb **urb_ptr,
const char *front, char **urb_buf_ptr,
u32 byte_offset, u32 device_byte_offset, u32 byte_width,
int *ident_ptr, int *sent_ptr);
struct drm_gem_object *udl_driver_gem_create_object(struct drm_device *dev,
size_t size);
int udl_handle_damage(struct udl_framebuffer *fb, int x, int y,
int width, int height);
int udl_drop_usb(struct drm_device *dev);
#define CMD_WRITE_RAW8 "\xAF\x60" /**< 8 bit raw write command. */
#define CMD_WRITE_RL8 "\xAF\x61" /**< 8 bit run length command. */
#define CMD_WRITE_COPY8 "\xAF\x62" /**< 8 bit copy command. */
#define CMD_WRITE_RLX8 "\xAF\x63" /**< 8 bit extended run length command. */
#define CMD_WRITE_RAW16 "\xAF\x68" /**< 16 bit raw write command. */
#define CMD_WRITE_RL16 "\xAF\x69" /**< 16 bit run length command. */
#define CMD_WRITE_COPY16 "\xAF\x6A" /**< 16 bit copy command. */
#define CMD_WRITE_RLX16 "\xAF\x6B" /**< 16 bit extended run length command. */
#endif
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