138 lines
2.9 KiB
C
138 lines
2.9 KiB
C
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/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* hdmi-codec.h - HDMI Codec driver API
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*
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* Copyright (C) 2014 Texas Instruments Incorporated - https://www.ti.com
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*
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* Author: Jyri Sarha <jsarha@ti.com>
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*/
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#ifndef __HDMI_CODEC_H__
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#define __HDMI_CODEC_H__
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#include <linux/of_graph.h>
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#include <linux/hdmi.h>
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#include <drm/drm_edid.h>
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#include <sound/asoundef.h>
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#include <sound/soc.h>
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#include <uapi/sound/asound.h>
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/*
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* Protocol between ASoC cpu-dai and HDMI-encoder
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*/
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struct hdmi_codec_daifmt {
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enum {
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HDMI_I2S,
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HDMI_RIGHT_J,
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HDMI_LEFT_J,
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HDMI_DSP_A,
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HDMI_DSP_B,
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HDMI_AC97,
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HDMI_SPDIF,
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} fmt;
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unsigned int bit_clk_inv:1;
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unsigned int frame_clk_inv:1;
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unsigned int bit_clk_provider:1;
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unsigned int frame_clk_provider:1;
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/* bit_fmt could be standard PCM format or
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* IEC958 encoded format. ALSA IEC958 plugin will pass
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* IEC958_SUBFRAME format to the underneath driver.
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*/
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snd_pcm_format_t bit_fmt;
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};
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/*
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* HDMI audio parameters
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*/
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struct hdmi_codec_params {
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struct hdmi_audio_infoframe cea;
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struct snd_aes_iec958 iec;
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int sample_rate;
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int sample_width;
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int channels;
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};
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typedef void (*hdmi_codec_plugged_cb)(struct device *dev,
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bool plugged);
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struct hdmi_codec_pdata;
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struct hdmi_codec_ops {
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/*
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* Called when ASoC starts an audio stream setup.
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* Optional
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*/
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int (*audio_startup)(struct device *dev, void *data);
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/*
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* Configures HDMI-encoder for audio stream.
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* Having either prepare or hw_params is mandatory.
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*/
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int (*hw_params)(struct device *dev, void *data,
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struct hdmi_codec_daifmt *fmt,
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struct hdmi_codec_params *hparms);
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/*
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* Configures HDMI-encoder for audio stream. Can be called
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* multiple times for each setup.
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*
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* Having either prepare or hw_params is mandatory.
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*/
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int (*prepare)(struct device *dev, void *data,
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struct hdmi_codec_daifmt *fmt,
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struct hdmi_codec_params *hparms);
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/*
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* Shuts down the audio stream.
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* Mandatory
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*/
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void (*audio_shutdown)(struct device *dev, void *data);
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/*
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* Mute/unmute HDMI audio stream.
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* Optional
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*/
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int (*mute_stream)(struct device *dev, void *data,
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bool enable, int direction);
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/*
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* Provides EDID-Like-Data from connected HDMI device.
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* Optional
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*/
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int (*get_eld)(struct device *dev, void *data,
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uint8_t *buf, size_t len);
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/*
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* Getting DAI ID
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* Optional
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*/
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int (*get_dai_id)(struct snd_soc_component *comment,
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struct device_node *endpoint);
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/*
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* Hook callback function to handle connector plug event.
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* Optional
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*/
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int (*hook_plugged_cb)(struct device *dev, void *data,
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hdmi_codec_plugged_cb fn,
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struct device *codec_dev);
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/* bit field */
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unsigned int no_capture_mute:1;
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};
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/* HDMI codec initalization data */
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struct hdmi_codec_pdata {
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const struct hdmi_codec_ops *ops;
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uint i2s:1;
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uint spdif:1;
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int max_i2s_channels;
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void *data;
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};
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struct snd_soc_component;
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struct snd_soc_jack;
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#define HDMI_CODEC_DRV_NAME "hdmi-audio-codec"
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#endif /* __HDMI_CODEC_H__ */
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