/*
   * Copyright © 2014 Intel Corporation
   *
   * Permission is hereby granted, free of charge, to any person obtaining a
   * copy of this software and associated documentation files (the "Software"),
   * to deal in the Software without restriction, including without limitation
   * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   * and/or sell copies of the Software, and to permit persons to whom the
   * Software is furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice (including the next
   * paragraph) shall be included in all copies or substantial portions of the
   * Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
   * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
   * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
   * IN THE SOFTWARE.
   */
  
  #ifndef _I915_COMPONENT_H_
  #define _I915_COMPONENT_H_
  
  /* MAX_PORT is the number of port
   * It must be sync with I915_MAX_PORTS defined i915_drv.h
   * 5 should be enough as only HSW, BDW, SKL need such fix.
   */
  #define MAX_PORTS 5
  
  /**
   * struct i915_audio_component_ops - Ops implemented by i915 driver, called by hda driver
   */
  struct i915_audio_component_ops {
  	/**
  	 * @owner: i915 module
  	 */
  	struct module *owner;
  	/**
  	 * @get_power: get the POWER_DOMAIN_AUDIO power well
  	 *
  	 * Request the power well to be turned on.
  	 */
  	void (*get_power)(struct device *);
  	/**
  	 * @put_power: put the POWER_DOMAIN_AUDIO power well
  	 *
  	 * Allow the power well to be turned off.
  	 */
  	void (*put_power)(struct device *);
  	/**
  	 * @codec_wake_override: Enable/disable codec wake signal
  	 */
  	void (*codec_wake_override)(struct device *, bool enable);
  	/**
  	 * @get_cdclk_freq: Get the Core Display Clock in kHz
  	 */
  	int (*get_cdclk_freq)(struct device *);
  	/**
  	 * @sync_audio_rate: set n/cts based on the sample rate
  	 *
  	 * Called from audio driver. After audio driver sets the
  	 * sample rate, it will call this function to set n/cts
  	 */
  	int (*sync_audio_rate)(struct device *, int port, int pipe, int rate);
  	/**
  	 * @get_eld: fill the audio state and ELD bytes for the given port
  	 *
  	 * Called from audio driver to get the HDMI/DP audio state of the given
  	 * digital port, and also fetch ELD bytes to the given pointer.
  	 *
  	 * It returns the byte size of the original ELD (not the actually
  	 * copied size), zero for an invalid ELD, or a negative error code.
  	 *
  	 * Note that the returned size may be over @max_bytes.  Then it
  	 * implies that only a part of ELD has been copied to the buffer.
  	 */
  	int (*get_eld)(struct device *, int port, int pipe, bool *enabled,
  		       unsigned char *buf, int max_bytes);
  };
  
  /**
   * struct i915_audio_component_audio_ops - Ops implemented by hda driver, called by i915 driver
   */
  struct i915_audio_component_audio_ops {
  	/**
  	 * @audio_ptr: Pointer to be used in call to pin_eld_notify
  	 */
  	void *audio_ptr;
  	/**
  	 * @pin_eld_notify: Notify the HDA driver that pin sense and/or ELD information has changed
  	 *
  	 * Called when the i915 driver has set up audio pipeline or has just
  	 * begun to tear it down. This allows the HDA driver to update its
  	 * status accordingly (even when the HDA controller is in power save
  	 * mode).
  	 */
  	void (*pin_eld_notify)(void *audio_ptr, int port, int pipe);
  };
  
  /**
   * struct i915_audio_component - Used for direct communication between i915 and hda drivers
   */
  struct i915_audio_component {
  	/**
  	 * @dev: i915 device, used as parameter for ops
  	 */
  	struct device *dev;
  	/**
  	 * @aud_sample_rate: the array of audio sample rate per port
  	 */
  	int aud_sample_rate[MAX_PORTS];
  	/**
  	 * @ops: Ops implemented by i915 driver, called by hda driver
  	 */
  	const struct i915_audio_component_ops *ops;
  	/**
  	 * @audio_ops: Ops implemented by hda driver, called by i915 driver
  	 */
  	const struct i915_audio_component_audio_ops *audio_ops;
  };
  
  #endif /* _I915_COMPONENT_H_ */