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@free.fr --- 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 655ebb0..90a508f 100644 --- a/drivers/gpu/drm/i2c/tda998x_drv.c +++ b/drivers/gpu/drm/i2c/tda998x_drv.c @@ -758,6 +758,66 @@ 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, @@ -1123,6 +1183,12 @@ 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; @@ -1158,6 +1224,10 @@ 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); }
@@ -1294,6 +1364,9 @@ 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 */ @@ -1407,6 +1480,13 @@ 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 efaafce..08b73bd 100644 --- a/sound/soc/codecs/Kconfig +++ b/sound/soc/codecs/Kconfig @@ -105,6 +105,7 @@ config SND_SOC_ALL_CODECS select SND_SOC_TAS2552 if I2C select SND_SOC_TAS5086 if I2C select SND_SOC_TAS571X 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 @@ -622,6 +623,11 @@ config SND_SOC_TAS571X tristate "Texas Instruments TAS5711/TAS5717/TAS5719 power amplifiers" 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 cf160d9..819d689 100644 --- a/sound/soc/codecs/Makefile +++ b/sound/soc/codecs/Makefile @@ -108,6 +108,7 @@ snd-soc-sta529-objs := sta529.o snd-soc-stac9766-objs := stac9766.o snd-soc-tas5086-objs := tas5086.o snd-soc-tas571x-objs := tas571x.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 @@ -292,6 +293,7 @@ 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_TAS571X) += snd-soc-tas571x.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@free.fr"); +MODULE_DESCRIPTION("TDA998X CODEC"); +MODULE_LICENSE("GPL");