drivers/video/fbdev/msm/mdss_hdmi_audio.h

/* Copyright (c) 2016, 2018,The Linux Foundation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 and
 * only version 2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#ifndef __MDSS_HDMI_AUDIO_H__
#define __MDSS_HDMI_AUDIO_H__

#include <linux/mdss_io_util.h>
#include <linux/msm_hdmi.h>

#define AUDIO_ACK_SET_ENABLE BIT(5)
#define AUDIO_ACK_ENABLE BIT(4)
#define AUDIO_ACK_CONNECT BIT(0)

/**
 * struct hdmi_audio_status - hdmi audio current status info
 * @ack_pending: notification acknowledgment status
 * @ack_enabled: acknowledgment feature is enabled or disabled
 * @switched: audio notification status for routing
 *
 * Data for client to query about the current status of audio
 */
struct hdmi_audio_status {
	bool ack_pending;
	bool ack_enabled;
	bool switched;
};

/**
 * struct hdmi_audio_ops - audio operations for clients to call
 * @on: function pointer to enable audio
 * @reset: function pointer to reset the audio current status to default
 * @status: function pointer to get the current status of audio
 * @notify: function pointer to notify other modules for audio routing
 * @ack: function pointer to acknowledge audio routing change
 *
 * Provides client operations for audio functionalities
 */
struct hdmi_audio_ops {
	int (*on)(void *ctx, u32 pclk,
		struct msm_hdmi_audio_setup_params *params);
	void (*off)(void *ctx);
	void (*reset)(void *ctx);
	void (*status)(void *ctx, struct hdmi_audio_status *status);
	void (*notify)(void *ctx, int val);
	void (*ack)(void *ctx, u32 ack, u32 hpd);
};

/**
 * struct hdmi_audio_init_data - data needed for initializing audio module
 * @io: pointer to register access related data
 * @ops: pointer to populate operation functions.
 *
 * Defines the data needed to be provided while initializing audio module
 */
struct hdmi_audio_init_data {
	struct dss_io_data *io;
	struct hdmi_audio_ops *ops;
};

void *hdmi_audio_register(struct hdmi_audio_init_data *data);
void hdmi_audio_unregister(void *data);

#endif /* __MDSS_HDMI_AUDIO_H__ */