zircon/kernel/include/dev/display.h

// Copyright 2016 The Fuchsia Authors
// Copyright (c) 2008-2010 Travis Geiselbrecht
//
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file or at
// https://opensource.org/licenses/MIT

#ifndef ZIRCON_KERNEL_INCLUDE_DEV_DISPLAY_H_
#define ZIRCON_KERNEL_INCLUDE_DEV_DISPLAY_H_

#include <inttypes.h>
#include <stdbool.h>
#include <sys/types.h>
#include <zircon/compiler.h>
#include <zircon/pixelformat.h>
#include <zircon/types.h>

int display_init(void *framebuffer);
int display_enable(bool enable);
void display_pre_freq_change(void);
void display_post_freq_change(void);

// Has no effect if DISPLAY_FLAG_CRASH_FRAMEBUFFER is set
#define DISPLAY_FLAG_HW_FRAMEBUFFER (1 << 0)
#define DISPLAY_FLAG_NEEDS_CACHE_FLUSH (1 << 1)

// gfxconsole will not allocate a backing buffer
// or do any other allocations
#define DISPLAY_FLAG_CRASH_FRAMEBUFFER (1 << 2)

struct display_info {
  void *framebuffer;
  zx_pixel_format_t format;
  uint width;
  uint height;
  uint stride;

  uint32_t flags;

  // Update function
  void (*flush)(uint starty, uint endy);
};

__BEGIN_CDECLS
zx_status_t display_get_info(struct display_info *info);
__END_CDECLS

#endif  // ZIRCON_KERNEL_INCLUDE_DEV_DISPLAY_H_