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28785f548d
Existing hdmi-codec driver only support standard pcm format. Support of IEC958 encoded format pass from ALSA IEC958 plugin is needed so that the IEC958 encoded data can be streamed to the HDMI chip. Signed-off-by: Sia Jee Heng <jee.heng.sia@intel.com> Link: https://lore.kernel.org/r/20210204014258.10197-2-jee.heng.sia@intel.com Signed-off-by: Mark Brown <broonie@kernel.org>
128 lines
2.6 KiB
C
128 lines
2.6 KiB
C
/* 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_master:1;
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unsigned int frame_clk_master: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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* 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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* 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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