sdk/banjo/ddk.protocol.amlogiccanvas/amlogic-canvas.banjo

// Copyright 2018 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

library ddk.protocol.amlogiccanvas;

using zx;

enum CanvasFlags : uint32 {
    READ = 0x1;
    WRITE = 0x2;
};

struct CanvasInfo {
    uint32 height;
    uint32 stride_bytes;
    uint32 wrap;
    uint32 blkmode;
    uint32 endianness;
    uint32 flags;
};

[Layout = "ddk-protocol"]
protocol AmlogicCanvas {
    /// Configures a canvas.
    /// Adds a framebuffer to the canvas lookup table.
    Config(handle<vmo> vmo, usize offset, CanvasInfo info) -> (zx.status s, uint8 canvas_idx);
    /// Frees up a canvas.
    Free(uint8 canvas_idx) -> (zx.status s);
};