Add a generic codec to interface audio with DRM drivers
Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen at st.com>
---
include/sound/hdmi_drm.h | 16 ++++++
sound/soc/codecs/Kconfig | 4 ++
sound/soc/codecs/Makefile | 2 +
sound/soc/codecs/hdmi_drm.c | 125 ++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 147 insertions(+)
create mode 100644 include/sound/hdmi_drm.h
create mode 100644 sound/soc/codecs/hdmi_drm.c
diff --git a/include/sound/hdmi_drm.h b/include/sound/hdmi_drm.h
new file mode 100644
index 0000000..0146b88
--- /dev/null
+++ b/include/sound/hdmi_drm.h
@@ -0,0 +1,16 @@
+/*
+ * Interface for HDMI DRM codec
+ *
+ * Author: Arnaud Pouliquen <arnaud.pouliquen at st.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.
+ */
+#ifndef __HDMI_DRM__H__
+#define __HDMI_DRM__H__
+
+int hdmi_drm_codec_register(struct device *dev);
+void hdmi_drm_codec_unregister(struct device *dev);
+
+#endif
diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index 0c9733e..922af30 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -80,6 +80,7 @@ config SND_SOC_ALL_CODECS
select SND_SOC_MC13783 if MFD_MC13XXX
select SND_SOC_ML26124 if I2C
select SND_SOC_HDMI_CODEC
+ select SND_SOC_HDMI_DRM_CODEC
select SND_SOC_PCM1681 if I2C
select SND_SOC_PCM1792A if SPI_MASTER
select SND_SOC_PCM3008
@@ -445,6 +446,9 @@ config SND_SOC_DMIC
config SND_SOC_HDMI_CODEC
tristate "HDMI stub CODEC"
+config SND_SOC_HDMI_DRM_CODEC
+ tristate "HDMI DRM CODEC"
+
config SND_SOC_ES8328
tristate "Everest Semi ES8328 CODEC"
diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile
index 4a32077..c92aaf7 100644
--- a/sound/soc/codecs/Makefile
+++ b/sound/soc/codecs/Makefile
@@ -73,6 +73,7 @@ snd-soc-max9850-objs := max9850.o
snd-soc-mc13783-objs := mc13783.o
snd-soc-ml26124-objs := ml26124.o
snd-soc-hdmi-codec-objs := hdmi.o
+snd-soc-hdmi-drm-codec-objs := hdmi_drm.o
snd-soc-pcm1681-objs := pcm1681.o
snd-soc-pcm1792a-codec-objs := pcm1792a.o
snd-soc-pcm3008-objs := pcm3008.o
@@ -265,6 +266,7 @@ obj-$(CONFIG_SND_SOC_MAX9850) += snd-soc-max9850.o
obj-$(CONFIG_SND_SOC_MC13783) += snd-soc-mc13783.o
obj-$(CONFIG_SND_SOC_ML26124) += snd-soc-ml26124.o
obj-$(CONFIG_SND_SOC_HDMI_CODEC) += snd-soc-hdmi-codec.o
+obj-$(CONFIG_SND_SOC_HDMI_DRM_CODEC) += snd-soc-hdmi-drm-codec.o
obj-$(CONFIG_SND_SOC_PCM1681) += snd-soc-pcm1681.o
obj-$(CONFIG_SND_SOC_PCM1792A) += snd-soc-pcm1792a-codec.o
obj-$(CONFIG_SND_SOC_PCM3008) += snd-soc-pcm3008.o
diff --git a/sound/soc/codecs/hdmi_drm.c b/sound/soc/codecs/hdmi_drm.c
new file mode 100644
index 0000000..2df9a8f
--- /dev/null
+++ b/sound/soc/codecs/hdmi_drm.c
@@ -0,0 +1,125 @@
+/*
+ * ALSA SoC codec driver for DRM HDMI device.
+ * Copyright (C) STMicroelectronics SA 2015
+ * Authors: Arnaud Pouliquen <arnaud.pouliquen at st.com>
+ * for STMicroelectronics.
+ * License terms: GNU General Public License (GPL), version 2
+ */
+
+#include <linux/module.h>
+#include <sound/soc.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+
+#include <drm/drm_crtc_helper.h>
+
+struct hdmi_drm_dai_data {
+ struct drm_bridge *bridge;
+};
+
+static const struct snd_soc_dapm_widget hdmi_drm_widgets[] = {
+ SND_SOC_DAPM_OUTPUT("TX"),
+};
+
+static const struct snd_soc_dapm_route hdmi_drm_routes[] = {
+ { "TX", NULL, "Playback" },
+};
+
+int hdmi_drm_dai_prepare(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct hdmi_drm_dai_data *priv = snd_soc_dai_get_drvdata(dai);
+
+ dev_err(dai->dev, "%s: enter for bridge %p\n", __func__, priv->bridge);
+ drm_audio_bridge_pre_enable(priv->bridge);
+ return 0;
+}
+
+int hdmi_drm_dai_trigger(struct snd_pcm_substream *substream, int cmd,
+ struct snd_soc_dai *dai)
+{
+ struct hdmi_drm_dai_data *priv = snd_soc_dai_get_drvdata(dai);
+
+ dev_err(dai->dev, "%s: enter\n", __func__);
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ drm_audio_bridge_enable(priv->bridge);
+ break;
+
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ drm_audio_bridge_disable(priv->bridge);
+ break;
+ }
+
+ return 0;
+}
+
+static int st_hdmi_dai_probe(struct snd_soc_dai *dai)
+{
+ struct hdmi_drm_dai_data *priv;
+
+ dev_err(dai->dev, "%s: enter\n", __func__);
+ priv = devm_kzalloc(dai->dev, sizeof(*priv), GFP_KERNEL);
+
+ priv->bridge = of_drm_find_bridge(dai->dev->of_node);
+
+ dev_err(dai->dev, "%s: bridge %p\n", __func__, priv->bridge);
+
+ snd_soc_dai_set_drvdata(dai, priv);
+
+ return 0;
+}
+
+static const struct snd_soc_dai_ops hdmi_drm_codec_ops = {
+ .prepare = hdmi_drm_dai_prepare,
+ .trigger = hdmi_drm_dai_trigger,
+};
+
+static struct snd_soc_dai_driver hdmi_drm_codec_dai = {
+ .name = "hdmi-hifi",
+ .playback = {
+ .stream_name = "Playback",
+ .channels_min = 2,
+ .channels_max = 8,
+ .rates = SNDRV_PCM_RATE_32000 |
+ SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
+ SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 |
+ SNDRV_PCM_RATE_176400 | SNDRV_PCM_RATE_192000,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE |
+ SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE,
+ .sig_bits = 24,
+ },
+ .probe = st_hdmi_dai_probe,
+ .ops = &hdmi_drm_codec_ops,
+};
+
+static struct snd_soc_codec_driver hdmi_drm_codec = {
+ .dapm_widgets = hdmi_drm_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(hdmi_drm_widgets),
+ .dapm_routes = hdmi_drm_routes,
+ .num_dapm_routes = ARRAY_SIZE(hdmi_drm_routes),
+ .ignore_pmdown_time = true,
+};
+
+int hdmi_drm_codec_register(struct device *dev)
+{
+ dev_err(dev, "%s: enter", __func__);
+ return snd_soc_register_codec(dev, &hdmi_drm_codec,
+ &hdmi_drm_codec_dai, 1);
+}
+EXPORT_SYMBOL_GPL(hdmi_drm_codec_register);
+
+void hdmi_drm_codec_unregister(struct device *dev)
+{
+ dev_err(dev, "%s: enter", __func__);
+ snd_soc_unregister_codec(dev);
+}
+EXPORT_SYMBOL_GPL(hdmi_drm_codec_unregister);
+
+MODULE_AUTHOR("Arnaud.pouliquen at st.com");
+MODULE_DESCRIPTION("ASoC HDMI codec driver");
+MODULE_LICENSE("GPL");
--
1.9.1
