[PATCH v12 6/6] ASoC: tda998x: add a codec to the HDMI transmitter
From: Jean-Francois Moine
Date: Fri May 08 2015 - 07:26:40 EST
The tda998x CODEC maintains the audio constraints according to
the HDMI device parameters (EDID) and sets dynamically the input ports
in the TDA998x I2C driver on start/stop audio streaming.
Signed-off-by: Jean-Francois Moine <moinejf@xxxxxxx>
---
drivers/gpu/drm/i2c/tda998x_drv.c | 80 +++++++++++++++++++++++
include/sound/tda998x.h | 15 +++++
sound/soc/codecs/Kconfig | 6 ++
sound/soc/codecs/Makefile | 2 +
sound/soc/codecs/tda998x.c | 132 ++++++++++++++++++++++++++++++++++++++
5 files changed, 235 insertions(+)
create mode 100644 sound/soc/codecs/tda998x.c
diff --git a/drivers/gpu/drm/i2c/tda998x_drv.c b/drivers/gpu/drm/i2c/tda998x_drv.c
index 7a9d9a7..64eddcf 100644
--- a/drivers/gpu/drm/i2c/tda998x_drv.c
+++ b/drivers/gpu/drm/i2c/tda998x_drv.c
@@ -755,6 +755,66 @@ tda998x_configure_audio(struct tda998x_priv *priv,
tda998x_write_aif(priv, p);
}
+#if IS_ENABLED(CONFIG_SND_SOC_TDA998X)
+/* tda998x audio codec interface */
+
+/* return the ELD to the CODEC */
+static u8 *tda998x_get_eld(struct device *dev)
+{
+ struct tda998x_priv *priv = dev_get_drvdata(dev);
+ struct drm_encoder *encoder = priv->encoder;
+ struct drm_device *drm = encoder->dev;
+ struct drm_connector *connector;
+
+ if (!priv->is_hdmi_sink
+ || !encoder->crtc)
+ return NULL;
+
+ list_for_each_entry(connector, &drm->mode_config.connector_list, head) {
+ if (connector->encoder == encoder)
+ return connector->eld;
+ }
+ return NULL;
+}
+
+/* switch the audio port and initialize the audio parameters for streaming */
+static int tda998x_set_audio_input(struct device *dev,
+ int port_index,
+ unsigned sample_rate)
+{
+ struct tda998x_priv *priv = dev_get_drvdata(dev);
+ struct tda998x_encoder_params *p = &priv->params;
+
+ if (!priv->encoder->crtc)
+ return -ENODEV;
+
+ /* if no port, just disable the audio port */
+ if (port_index == PORT_NONE) {
+ reg_write(priv, REG_ENA_AP, 0);
+ return 0;
+ }
+
+ /* if same audio parameters, just enable the audio port */
+ if (p->audio_cfg == priv->audio.ports[port_index] &&
+ p->audio_sample_rate == sample_rate) {
+ reg_write(priv, REG_ENA_AP, p->audio_cfg);
+ return 0;
+ }
+
+ p->audio_format = priv->audio.port_types[port_index];
+ p->audio_clk_cfg = p->audio_format == AFMT_SPDIF ? 0 : 1;
+ p->audio_cfg = priv->audio.ports[port_index];
+ p->audio_sample_rate = sample_rate;
+ tda998x_configure_audio(priv, &priv->encoder->crtc->hwmode, p);
+ return 0;
+}
+
+static struct tda998x_ops_s tda998x_codec_ops = {
+ .get_eld = tda998x_get_eld,
+ .set_audio_input = tda998x_set_audio_input,
+};
+#endif /* SND_SOC */
+
/* DRM encoder functions */
static void tda998x_encoder_set_config(struct tda998x_priv *priv,
@@ -1120,6 +1180,12 @@ tda998x_encoder_get_modes(struct tda998x_priv *priv,
drm_mode_connector_update_edid_property(connector, edid);
n = drm_add_edid_modes(connector, edid);
priv->is_hdmi_sink = drm_detect_hdmi_monitor(edid);
+
+#if IS_ENABLED(CONFIG_SND_SOC_TDA998X)
+ if (priv->is_hdmi_sink)
+ drm_edid_to_eld(connector, edid);
+#endif
+
kfree(edid);
return n;
@@ -1155,6 +1221,10 @@ static void tda998x_destroy(struct tda998x_priv *priv)
cancel_delayed_work_sync(&priv->dwork);
}
+#if IS_ENABLED(CONFIG_SND_SOC_TDA998X)
+ if (priv->audio.ports[0])
+ tda9998x_codec_unregister(&priv->hdmi->dev);
+#endif
i2c_unregister_device(priv->cec);
}
@@ -1291,6 +1361,9 @@ static int tda998x_create(struct i2c_client *client, struct tda998x_priv *priv)
priv->vip_cntrl_1 = VIP_CNTRL_1_SWAP_C(0) | VIP_CNTRL_1_SWAP_D(1);
priv->vip_cntrl_2 = VIP_CNTRL_2_SWAP_E(4) | VIP_CNTRL_2_SWAP_F(5);
+ priv->params.audio_frame[1] = 1; /* channels - 1 */
+ priv->params.audio_sample_rate = 48000; /* 48kHz */
+
priv->current_page = 0xff;
priv->hdmi = client;
/* CEC I2C address bound to TDA998x I2C addr by configuration pins */
@@ -1404,6 +1477,13 @@ static int tda998x_create(struct i2c_client *client, struct tda998x_priv *priv)
priv->params.audio_clk_cfg =
priv->params.audio_format ==
AFMT_SPDIF ? 0 : 1;
+
+#if IS_ENABLED(CONFIG_SND_SOC_TDA998X)
+ /* and create the audio CODEC */
+ tda9998x_codec_register(&client->dev,
+ &priv->audio,
+ &tda998x_codec_ops);
+#endif
}
} else {
diff --git a/include/sound/tda998x.h b/include/sound/tda998x.h
index 487a809..8e89db4 100644
--- a/include/sound/tda998x.h
+++ b/include/sound/tda998x.h
@@ -1,8 +1,23 @@
#ifndef SND_TDA998X_H
#define SND_TDA998X_H
+/* port index for audio stream stop */
+#define PORT_NONE (-1)
+
struct tda998x_audio_s {
u8 ports[2]; /* AP value */
u8 port_types[2]; /* AFMT_xxx */
};
+
+struct tda998x_ops_s {
+ u8 *(*get_eld)(struct device *dev);
+ int (*set_audio_input)(struct device *dev,
+ int port_index,
+ unsigned sample_rate);
+};
+
+int tda9998x_codec_register(struct device *dev,
+ struct tda998x_audio_s *tda998x_audio_i,
+ struct tda998x_ops_s *tda998x_ops);
+void tda9998x_codec_unregister(struct device *dev);
#endif
diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index 061c465..e7a33cc 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -104,6 +104,7 @@ config SND_SOC_ALL_CODECS
select SND_SOC_STAC9766 if SND_SOC_AC97_BUS
select SND_SOC_TAS2552 if I2C
select SND_SOC_TAS5086 if I2C
+ select SND_SOC_TDA998X if DRM_I2C_NXP_TDA998X
select SND_SOC_TFA9879 if I2C
select SND_SOC_TLV320AIC23_I2C if I2C
select SND_SOC_TLV320AIC23_SPI if SPI_MASTER
@@ -611,6 +612,11 @@ config SND_SOC_TAS5086
tristate "Texas Instruments TAS5086 speaker amplifier"
depends on I2C
+config SND_SOC_TDA998X
+ def_tristate y
+ select SND_PCM_ELD
+ depends on DRM_I2C_NXP_TDA998X
+
config SND_SOC_TFA9879
tristate "NXP Semiconductors TFA9879 amplifier"
depends on I2C
diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile
index abe2d7e..8183474 100644
--- a/sound/soc/codecs/Makefile
+++ b/sound/soc/codecs/Makefile
@@ -106,6 +106,7 @@ snd-soc-sta350-objs := sta350.o
snd-soc-sta529-objs := sta529.o
snd-soc-stac9766-objs := stac9766.o
snd-soc-tas5086-objs := tas5086.o
+snd-soc-tda998x-objs := tda998x.o
snd-soc-tfa9879-objs := tfa9879.o
snd-soc-tlv320aic23-objs := tlv320aic23.o
snd-soc-tlv320aic23-i2c-objs := tlv320aic23-i2c.o
@@ -288,6 +289,7 @@ obj-$(CONFIG_SND_SOC_STA529) += snd-soc-sta529.o
obj-$(CONFIG_SND_SOC_STAC9766) += snd-soc-stac9766.o
obj-$(CONFIG_SND_SOC_TAS2552) += snd-soc-tas2552.o
obj-$(CONFIG_SND_SOC_TAS5086) += snd-soc-tas5086.o
+obj-$(CONFIG_SND_SOC_TDA998X) += snd-soc-tda998x.o
obj-$(CONFIG_SND_SOC_TFA9879) += snd-soc-tfa9879.o
obj-$(CONFIG_SND_SOC_TLV320AIC23) += snd-soc-tlv320aic23.o
obj-$(CONFIG_SND_SOC_TLV320AIC23_I2C) += snd-soc-tlv320aic23-i2c.o
diff --git a/sound/soc/codecs/tda998x.c b/sound/soc/codecs/tda998x.c
new file mode 100644
index 0000000..f588a75
--- /dev/null
+++ b/sound/soc/codecs/tda998x.c
@@ -0,0 +1,132 @@
+/*
+ * ALSA SoC TDA998x CODEC
+ *
+ * Copyright (C) 2015 Jean-Francois Moine
+ *
+ * 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.
+ */
+
+#include <linux/module.h>
+#include <sound/soc.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <sound/pcm_drm_eld.h>
+#include <drm/i2c/tda998x.h>
+#include <sound/tda998x.h>
+
+/* functions in tda998x_drv */
+static struct tda998x_ops_s *tda998x_ops;
+
+static int tda998x_codec_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ u8 *eld;
+
+ eld = tda998x_ops->get_eld(dai->dev);
+ if (!eld)
+ return -ENODEV;
+ return snd_pcm_hw_constraint_eld(runtime, eld);
+}
+
+/* ask the HDMI transmitter to activate the audio input port */
+static int tda998x_codec_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ return tda998x_ops->set_audio_input(dai->dev, dai->id,
+ params_rate(params));
+}
+
+static void tda998x_codec_shutdown(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ tda998x_ops->set_audio_input(dai->dev, PORT_NONE, 0);
+}
+
+static const struct snd_soc_dai_ops tda998x_codec_ops = {
+ .startup = tda998x_codec_startup,
+ .hw_params = tda998x_codec_hw_params,
+ .shutdown = tda998x_codec_shutdown,
+};
+
+#define TDA998X_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
+ SNDRV_PCM_FMTBIT_S20_3LE | \
+ SNDRV_PCM_FMTBIT_S24_LE | \
+ SNDRV_PCM_FMTBIT_S32_LE)
+
+static struct snd_soc_dai_driver tda998x_dai_i2s = {
+ .name = "i2s-hifi",
+ .playback = {
+ .stream_name = "HDMI I2S Playback",
+ .channels_min = 1,
+ .channels_max = 8,
+ .rates = SNDRV_PCM_RATE_CONTINUOUS,
+ .rate_min = 5512,
+ .rate_max = 192000,
+ .formats = TDA998X_FORMATS,
+ },
+ .ops = &tda998x_codec_ops,
+};
+
+static const struct snd_soc_dapm_widget tda998x_widgets[] = {
+ SND_SOC_DAPM_OUTPUT("hdmi-out"),
+};
+static const struct snd_soc_dapm_route tda998x_routes[] = {
+ { "hdmi-out", NULL, "HDMI I2S Playback" },
+ { "hdmi-out", NULL, "HDMI SPDIF Playback" },
+};
+
+static struct snd_soc_codec_driver tda998x_codec_drv = {
+ .dapm_widgets = tda998x_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(tda998x_widgets),
+ .dapm_routes = tda998x_routes,
+ .num_dapm_routes = ARRAY_SIZE(tda998x_routes),
+ .ignore_pmdown_time = true,
+};
+
+int tda9998x_codec_register(struct device *dev,
+ struct tda998x_audio_s *tda998x_audio,
+ struct tda998x_ops_s *tda998x_ops_i)
+{
+ struct snd_soc_dai_driver *dais, *p_dai;
+ int i, ndais;
+
+ tda998x_ops = tda998x_ops_i;
+
+ /* build the DAIs */
+ for (ndais = 0; ndais < ARRAY_SIZE(tda998x_audio->ports); ndais++) {
+ if (!tda998x_audio->ports[ndais])
+ break;
+ }
+ dais = devm_kzalloc(dev, sizeof(*dais) * ndais, GFP_KERNEL);
+ if (!dais)
+ return -ENOMEM;
+ for (i = 0, p_dai = dais; i < ndais ; i++, p_dai++) {
+ memcpy(p_dai, &tda998x_dai_i2s, sizeof(*p_dai));
+ p_dai->id = i;
+ if (tda998x_audio->port_types[i] == AFMT_SPDIF) {
+ p_dai->name = "spdif-hifi";
+ p_dai->playback.stream_name = "HDMI SPDIF Playback";
+ p_dai->playback.channels_max = 2;
+ p_dai->playback.rate_min = 22050;
+ }
+ }
+
+ return snd_soc_register_codec(dev,
+ &tda998x_codec_drv,
+ dais, ndais);
+}
+EXPORT_SYMBOL(tda9998x_codec_register);
+
+void tda9998x_codec_unregister(struct device *dev)
+{
+ snd_soc_unregister_codec(dev);
+}
+EXPORT_SYMBOL(tda9998x_codec_unregister);
+
+MODULE_AUTHOR("Jean-Francois Moine <moinejf@xxxxxxx>");
+MODULE_DESCRIPTION("TDA998X CODEC");
+MODULE_LICENSE("GPL");
--
2.1.4
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