// 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.

#ifndef ZIRCON_SYSTEM_DEV_DISPLAY_INTEL_I915_INTERRUPTS_H_
#define ZIRCON_SYSTEM_DEV_DISPLAY_INTEL_I915_INTERRUPTS_H_

#include <ddk/protocol/intelgpucore.h>
#include <fbl/macros.h>
#include <lib/zx/handle.h>
#include <threads.h>
#include <zircon/types.h>

#include "registers-pipe.h"

namespace i915 {

class Controller;

class Interrupts {
 public:
  Interrupts();
  ~Interrupts();

  zx_status_t Init(Controller* controller);
  void FinishInit();
  void Resume();
  void Destroy();

  void EnablePipeVsync(registers::Pipe pipe, bool enable);
  zx_status_t SetInterruptCallback(const zx_intel_gpu_core_interrupt_t* callback,
                                   uint32_t interrupt_mask);

  int IrqLoop();

 private:
  void EnableHotplugInterrupts();
  void HandlePipeInterrupt(registers::Pipe pipe, zx_time_t timestamp);

  Controller* controller_;  // Assume that controller callbacks are threadsafe

  zx::handle irq_;
  thrd_t irq_thread_;

  zx_intel_gpu_core_interrupt_t interrupt_cb_ __TA_GUARDED(lock_);
  uint32_t interrupt_mask_ __TA_GUARDED(lock_) = 0;

  mtx_t lock_;

  DISALLOW_COPY_ASSIGN_AND_MOVE(Interrupts);
};

}  // namespace i915

#endif  // ZIRCON_SYSTEM_DEV_DISPLAY_INTEL_I915_INTERRUPTS_H_