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-rw-r--r--include/sound/hdmi-codec.h137
1 files changed, 137 insertions, 0 deletions
diff --git a/include/sound/hdmi-codec.h b/include/sound/hdmi-codec.h
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+++ b/include/sound/hdmi-codec.h
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+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * hdmi-codec.h - HDMI Codec driver API
+ *
+ * Copyright (C) 2014 Texas Instruments Incorporated - https://www.ti.com
+ *
+ * Author: Jyri Sarha <jsarha@ti.com>
+ */
+
+#ifndef __HDMI_CODEC_H__
+#define __HDMI_CODEC_H__
+
+#include <linux/of_graph.h>
+#include <linux/hdmi.h>
+#include <drm/drm_edid.h>
+#include <sound/asoundef.h>
+#include <sound/soc.h>
+#include <uapi/sound/asound.h>
+
+/*
+ * Protocol between ASoC cpu-dai and HDMI-encoder
+ */
+struct hdmi_codec_daifmt {
+ enum {
+ HDMI_I2S,
+ HDMI_RIGHT_J,
+ HDMI_LEFT_J,
+ HDMI_DSP_A,
+ HDMI_DSP_B,
+ HDMI_AC97,
+ HDMI_SPDIF,
+ } fmt;
+ unsigned int bit_clk_inv:1;
+ unsigned int frame_clk_inv:1;
+ unsigned int bit_clk_provider:1;
+ unsigned int frame_clk_provider:1;
+ /* bit_fmt could be standard PCM format or
+ * IEC958 encoded format. ALSA IEC958 plugin will pass
+ * IEC958_SUBFRAME format to the underneath driver.
+ */
+ snd_pcm_format_t bit_fmt;
+};
+
+/*
+ * HDMI audio parameters
+ */
+struct hdmi_codec_params {
+ struct hdmi_audio_infoframe cea;
+ struct snd_aes_iec958 iec;
+ int sample_rate;
+ int sample_width;
+ int channels;
+};
+
+typedef void (*hdmi_codec_plugged_cb)(struct device *dev,
+ bool plugged);
+
+struct hdmi_codec_pdata;
+struct hdmi_codec_ops {
+ /*
+ * Called when ASoC starts an audio stream setup.
+ * Optional
+ */
+ int (*audio_startup)(struct device *dev, void *data);
+
+ /*
+ * Configures HDMI-encoder for audio stream.
+ * Having either prepare or hw_params is mandatory.
+ */
+ int (*hw_params)(struct device *dev, void *data,
+ struct hdmi_codec_daifmt *fmt,
+ struct hdmi_codec_params *hparms);
+
+ /*
+ * Configures HDMI-encoder for audio stream. Can be called
+ * multiple times for each setup.
+ *
+ * Having either prepare or hw_params is mandatory.
+ */
+ int (*prepare)(struct device *dev, void *data,
+ struct hdmi_codec_daifmt *fmt,
+ struct hdmi_codec_params *hparms);
+
+ /*
+ * Shuts down the audio stream.
+ * Mandatory
+ */
+ void (*audio_shutdown)(struct device *dev, void *data);
+
+ /*
+ * Mute/unmute HDMI audio stream.
+ * Optional
+ */
+ int (*mute_stream)(struct device *dev, void *data,
+ bool enable, int direction);
+
+ /*
+ * Provides EDID-Like-Data from connected HDMI device.
+ * Optional
+ */
+ int (*get_eld)(struct device *dev, void *data,
+ uint8_t *buf, size_t len);
+
+ /*
+ * Getting DAI ID
+ * Optional
+ */
+ int (*get_dai_id)(struct snd_soc_component *comment,
+ struct device_node *endpoint);
+
+ /*
+ * Hook callback function to handle connector plug event.
+ * Optional
+ */
+ int (*hook_plugged_cb)(struct device *dev, void *data,
+ hdmi_codec_plugged_cb fn,
+ struct device *codec_dev);
+
+ /* bit field */
+ unsigned int no_capture_mute:1;
+};
+
+/* HDMI codec initalization data */
+struct hdmi_codec_pdata {
+ const struct hdmi_codec_ops *ops;
+ uint i2s:1;
+ uint spdif:1;
+ int max_i2s_channels;
+ void *data;
+};
+
+struct snd_soc_component;
+struct snd_soc_jack;
+
+#define HDMI_CODEC_DRV_NAME "hdmi-audio-codec"
+
+#endif /* __HDMI_CODEC_H__ */