zircon/system/dev/display/astro-display/vpu.h

// 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.

#pragma once

#include <zircon/compiler.h>
#include <ddk/protocol/platform/device.h>
#include <ddk/protocol/platform-device-lib.h>
#include <lib/mmio/mmio.h>

#include "common.h"
#include "vpu-regs.h"
#include <optional>


namespace astro_display {

class Vpu {
public:
    Vpu() {}
    zx_status_t Init(zx_device_t* parent);
    // This function powers on VPU related blocks. The function contains undocumented
    // register and/or power-on sequences.
    void PowerOn();
    // This function powers off VPU related blocks. The function contains undocumented
    // register and/or power-off sequences.
    void PowerOff();
    // This function sets up default video post processing unit. It contains undocumented
    // registers and/or initialization sequences
    void VppInit();
private:
    // This function configures the VPU-related clocks. It contains undocumented registers
    // and/or clock initialization sequences
    void ConfigureClock();

    std::optional<ddk::MmioBuffer>    vpu_mmio_;
    std::optional<ddk::MmioBuffer>    hhi_mmio_;
    std::optional<ddk::MmioBuffer>    aobus_mmio_;
    std::optional<ddk::MmioBuffer>    cbus_mmio_;
    pdev_protocol_t                   pdev_ = {};

    bool                              initialized_ = false;

};
} // namespace astro_display