linux/sound/hda/ext/hdac_ext_controller.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 *  hdac-ext-controller.c - HD-audio extended controller functions.
 *
 *  Copyright (C) 2014-2015 Intel Corp
 *  Author: Jeeja KP <[email protected]>
 *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 */

#include <linux/delay.h>
#include <linux/slab.h>
#include <sound/hda_register.h>
#include <sound/hdaudio_ext.h>

/*
 * processing pipe helpers - these helpers are useful for dealing with HDA
 * new capability of processing pipelines
 */

/**
 * snd_hdac_ext_bus_ppcap_enable - enable/disable processing pipe capability
 * @bus: the pointer to HDAC bus object
 * @enable: flag to turn on/off the capability
 */
void snd_hdac_ext_bus_ppcap_enable(struct hdac_bus *bus, bool enable)
{ … }
EXPORT_SYMBOL_GPL(…);

/**
 * snd_hdac_ext_bus_ppcap_int_enable - ppcap interrupt enable/disable
 * @bus: the pointer to HDAC bus object
 * @enable: flag to enable/disable interrupt
 */
void snd_hdac_ext_bus_ppcap_int_enable(struct hdac_bus *bus, bool enable)
{ … }
EXPORT_SYMBOL_GPL(…);

/*
 * Multilink helpers - these helpers are useful for dealing with HDA
 * new multilink capability
 */

/**
 * snd_hdac_ext_bus_get_ml_capabilities - get multilink capability
 * @bus: the pointer to HDAC bus object
 *
 * This will parse all links and read the mlink capabilities and add them
 * in hlink_list of extended hdac bus
 * Note: this will be freed on bus exit by driver
 */
int snd_hdac_ext_bus_get_ml_capabilities(struct hdac_bus *bus)
{ … }
EXPORT_SYMBOL_GPL(…);

/**
 * snd_hdac_ext_link_free_all- free hdac extended link objects
 *
 * @bus: the pointer to HDAC bus object
 */

void snd_hdac_ext_link_free_all(struct hdac_bus *bus)
{ … }
EXPORT_SYMBOL_GPL(…);

/**
 * snd_hdac_ext_bus_get_hlink_by_addr - get hlink at specified address
 * @bus: hlink's parent bus device
 * @addr: codec device address
 *
 * Returns hlink object or NULL if matching hlink is not found.
 */
struct hdac_ext_link *snd_hdac_ext_bus_get_hlink_by_addr(struct hdac_bus *bus, int addr)
{ … }
EXPORT_SYMBOL_GPL(…);

/**
 * snd_hdac_ext_bus_get_hlink_by_name - get hlink based on codec name
 * @bus: the pointer to HDAC bus object
 * @codec_name: codec name
 */
struct hdac_ext_link *snd_hdac_ext_bus_get_hlink_by_name(struct hdac_bus *bus,
							 const char *codec_name)
{ … }
EXPORT_SYMBOL_GPL(…);

static int check_hdac_link_power_active(struct hdac_ext_link *hlink, bool enable)
{ … }

/**
 * snd_hdac_ext_bus_link_power_up -power up hda link
 * @hlink: HD-audio extended link
 */
int snd_hdac_ext_bus_link_power_up(struct hdac_ext_link *hlink)
{ … }
EXPORT_SYMBOL_GPL(…);

/**
 * snd_hdac_ext_bus_link_power_down -power down hda link
 * @hlink: HD-audio extended link
 */
int snd_hdac_ext_bus_link_power_down(struct hdac_ext_link *hlink)
{ … }
EXPORT_SYMBOL_GPL(…);

/**
 * snd_hdac_ext_bus_link_power_up_all -power up all hda link
 * @bus: the pointer to HDAC bus object
 */
int snd_hdac_ext_bus_link_power_up_all(struct hdac_bus *bus)
{ … }
EXPORT_SYMBOL_GPL(…);

/**
 * snd_hdac_ext_bus_link_power_down_all -power down all hda link
 * @bus: the pointer to HDAC bus object
 */
int snd_hdac_ext_bus_link_power_down_all(struct hdac_bus *bus)
{ … }
EXPORT_SYMBOL_GPL(…);

/**
 * snd_hdac_ext_bus_link_set_stream_id - maps stream id to link output
 * @link: HD-audio ext link to set up
 * @stream: stream id
 */
void snd_hdac_ext_bus_link_set_stream_id(struct hdac_ext_link *link,
					 int stream)
{ … }
EXPORT_SYMBOL_GPL(…);

/**
 * snd_hdac_ext_bus_link_clear_stream_id - maps stream id to link output
 * @link: HD-audio ext link to set up
 * @stream: stream id
 */
void snd_hdac_ext_bus_link_clear_stream_id(struct hdac_ext_link *link,
					   int stream)
{ … }
EXPORT_SYMBOL_GPL(…);

int snd_hdac_ext_bus_link_get(struct hdac_bus *bus,
				struct hdac_ext_link *hlink)
{ … }
EXPORT_SYMBOL_GPL(…);

int snd_hdac_ext_bus_link_put(struct hdac_bus *bus,
			      struct hdac_ext_link *hlink)
{ … }
EXPORT_SYMBOL_GPL(…);

static void hdac_ext_codec_link_up(struct hdac_device *codec)
{ … }

static void hdac_ext_codec_link_down(struct hdac_device *codec)
{ … }

void snd_hdac_ext_bus_link_power(struct hdac_device *codec, bool enable)
{ … }
EXPORT_SYMBOL_GPL(…);