The hdmi-codec is a platform device driver to be registered from
drivers of external HDMI encoders with I2S and/or spdif interface. The
driver in turn registers an ASoC codec for the encoder's audio
functionality.
The structures and definitions in the API header are mostly redundant
copies of similar structures in ASoC headers. This is on purpose to
avoid direct dependencies to ASoC structures in video side driver.
Signed-off-by: Jyri Sarha jsa...@ti.com
---
include/sound/hdmi-codec.h| 99 +
sound/soc/codecs/Kconfig | 4 +
sound/soc/codecs/Makefile | 2 +
sound/soc/codecs/hdmi-codec.c | 458 ++
4 files changed, 563 insertions(+)
create mode 100644 include/sound/hdmi-codec.h
create mode 100644 sound/soc/codecs/hdmi-codec.c
diff --git a/include/sound/hdmi-codec.h b/include/sound/hdmi-codec.h
new file mode 100644
index 000..0632bcb
--- /dev/null
+++ b/include/sound/hdmi-codec.h
@@ -0,0 +1,99 @@
+/*
+ * hdmi-codec.h - HDMI Codec driver API
+ *
+ * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com
+ *
+ * Author: Jyri Sarha jsa...@ti.com
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * 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 __HDMI_CODEC_H__
+#define __HDMI_CODEC_H__
+
+#include linux/hdmi.h
+#include drm/drm_edid.h
+#include sound/asoundef.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;
+ int bit_clk_inv:1;
+ int frame_clk_inv:1;
+ int bit_clk_master:1;
+ int frame_clk_master:1;
+};
+
+/*
+ * 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;
+};
+
+struct hdmi_codec_ops {
+ /* For runtime clock configuration from ASoC machine driver.
+* A direct forward from set_sysclk in struct snd_soc_dai_ops.
+* Optional */
+ int (*set_clk)(struct device *dev, int clk_id, int freq);
+
+ /* Called when ASoC starts an audio stream setup. The call
+* provides an audio abort callback for stoping an ongoing
+* stream if the HDMI audio becomes unavailable.
+* Optional */
+ int (*audio_startup)(struct device *dev,
+void (*abort_cb)(struct device *dev));
+
+ /* Configures HDMI-encoder for audio stream.
+* Mandatory */
+ int (*hw_params)(struct device *dev,
+struct hdmi_codec_daifmt *fmt,
+struct hdmi_codec_params *hparms);
+
+ /* Shuts down the audio stream.
+* Mandatory */
+ void (*audio_shutdown)(struct device *dev);
+
+ /* Mute/unmute HDMI audio stream.
+* Optional */
+ int (*digital_mute)(struct device *dev, bool enable);
+
+ /* Provides EDID-Like-Data from connected HDMI device.
+* Optional */
+ uint8_t *(*get_eld)(struct device *dev);
+};
+
+/* HDMI codec initalization data */
+struct hdmi_codec_pdata {
+ struct device *dev; /* The HDMI encoder registering the codec */
+ const struct hdmi_codec_ops *ops;
+ uint i2s:1;
+ uint spdif:1;
+ int max_i2s_channels;
+};
+
+#define HDMI_CODEC_DRV_NAME hdmi-audio-codec
+
+#endif /* __HDMI_CODEC_H__ */
diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index fb7f978..ef9646f 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -76,6 +76,7 @@ config SND_SOC_ALL_CODECS
select SND_SOC_MAX9877 if I2C
select SND_SOC_MC13783 if MFD_MC13XXX
select SND_SOC_ML26124 if I2C
+ select SND_SOC_HDMI_CODEC
select SND_SOC_PCM1681 if I2C
select SND_SOC_PCM1792A if SPI_MASTER
select SND_SOC_PCM3008
@@ -429,6 +430,9 @@ config SND_SOC_BT_SCO
config SND_SOC_DMIC
tristate
+config SND_SOC_HDMI_CODEC
+ tristate
+
config SND_SOC_ES8328
tristate Everest Semi ES8328 CODEC
diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile
index 4e5d17c..a128c2b 100644
--- a/sound/soc/codecs/Makefile
+++ b/sound/soc/codecs/Makefile
@@ -69,6 +69,7 @@ snd-soc-max98925-objs := max98925.o
snd-soc-max9850-objs := max9850.o
snd-soc-mc13783-objs := mc13783.o
snd-soc-ml26124-objs := ml26124.o
+snd-soc-hdmi-codec-objs := hdmi-codec.o
