This patch adds a CODEC function to the NXP TDA998x HDMI transmitter.
The CODEC handles both I2S and S/PDIF inputs.
It maintains the audio format and rate constraints according
to the HDMI device parameters (EDID) and does dynamic input
switch in the TDA998x I2C driver on start/stop audio streaming.
Signed-off-by: Jean-Francois Moine <moinejf(a)free.fr>
---
v5:
- use the TDA998x private data instead of a specific area
for the CODEC interface
- the CODEC is TDA998x specific (Mark Brown)
v4:
- remove all the TDA998x specific stuff from the CODEC
- move the EDID scan from the CODEC to the TDA998x
- move the CODEC to sound/soc (Mark Brown)
- update the audio_sample_rate from the EDID (Andrew Jackson)
v3: fix bad rate (Andrew Jackson)
v2: check double stream start (Mark Brown)
---
.../devicetree/bindings/drm/i2c/tda998x.txt | 18 ++
drivers/gpu/drm/i2c/Kconfig | 1 +
drivers/gpu/drm/i2c/tda998x_drv.c | 234 +++++++++++++++++++--
include/drm/i2c/tda998x.h | 12 ++
sound/soc/codecs/Kconfig | 3 +
sound/soc/codecs/Makefile | 2 +
sound/soc/codecs/tda998x.c | 163 ++++++++++++++
7 files changed, 415 insertions(+), 18 deletions(-)
create mode 100644 sound/soc/codecs/tda998x.c
diff --git a/Documentation/devicetree/bindings/drm/i2c/tda998x.txt b/Documentation/devicetree/bindings/drm/i2c/tda998x.txt
index e9e4bce..e50e7cd 100644
--- a/Documentation/devicetree/bindings/drm/i2c/tda998x.txt
+++ b/Documentation/devicetree/bindings/drm/i2c/tda998x.txt
@@ -17,6 +17,20 @@ Optional properties:
- video-ports: 24 bits value which defines how the video controller
output is wired to the TDA998x input - default: <0x230145>
+ - audio-ports: must contain one or two values selecting the source
+ in the audio port.
+ The source type is given by the corresponding entry in
+ the audio-port-names property.
+
+ - audio-port-names: must contain entries matching the entries in
+ the audio-ports property.
+ Each value may be "i2s" or "spdif", giving the type of
+ the audio source.
+
+ - #sound-dai-cells: must be set to <1> for use with the simple-card.
+ The TDA998x audio CODEC always defines two DAIs.
+ The DAI 0 is the S/PDIF input and the DAI 1 is the I2S input.
+
Example:
tda998x: hdmi-encoder {
@@ -26,4 +40,8 @@ Example:
interrupts = <27 2>; /* falling edge */
pinctrl-0 = <&pmx_camera>;
pinctrl-names = "default";
+
+ audio-ports = <0x04>, <0x03>;
+ audio-port-names = "spdif", "i2s";
+ #sound-dai-cells = <1>;
};
diff --git a/drivers/gpu/drm/i2c/Kconfig b/drivers/gpu/drm/i2c/Kconfig
index 4d341db..01b4f95 100644
--- a/drivers/gpu/drm/i2c/Kconfig
+++ b/drivers/gpu/drm/i2c/Kconfig
@@ -22,6 +22,7 @@ config DRM_I2C_SIL164
config DRM_I2C_NXP_TDA998X
tristate "NXP Semiconductors TDA998X HDMI encoder"
default m if DRM_TILCDC
+ select SND_SOC_TDA998x
help
Support for NXP Semiconductors TDA998X HDMI encoders.
diff --git a/drivers/gpu/drm/i2c/tda998x_drv.c b/drivers/gpu/drm/i2c/tda998x_drv.c
index d476279..7db681f 100644
--- a/drivers/gpu/drm/i2c/tda998x_drv.c
+++ b/drivers/gpu/drm/i2c/tda998x_drv.c
@@ -20,6 +20,7 @@
#include <linux/module.h>
#include <linux/irq.h>
#include <sound/asoundef.h>
+#include <linux/platform_device.h>
#include <drm/drmP.h>
#include <drm/drm_crtc_helper.h>
@@ -44,6 +45,23 @@ struct tda998x_priv {
wait_queue_head_t wq_edid;
volatile int wq_edid_wait;
struct drm_encoder *encoder;
+
+ /* audio variables */
+ struct platform_device *pdev_codec;
+ u8 audio_ports[2];
+
+ u8 max_channels; /* EDID parameters */
+ u8 rate_mask;
+ u8 fmt;
+
+ int audio_sample_format;
+ struct snd_pcm_hw_constraint_list rate_constraints;
+};
+
+struct tda998x_priv2 {
+ struct tda998x_priv base;
+ struct drm_encoder encoder;
+ struct drm_connector connector;
};
#define to_tda998x_priv(x) ((struct tda998x_priv *)to_encoder_slave(x)->slave_priv)
@@ -639,12 +657,11 @@ static void
tda998x_configure_audio(struct tda998x_priv *priv,
struct drm_display_mode *mode, struct tda998x_encoder_params *p)
{
- uint8_t buf[6], clksel_aip, clksel_fs, cts_n, adiv;
+ uint8_t buf[6], clksel_aip, clksel_fs, cts_n, adiv, aclk;
uint32_t n;
/* Enable audio ports */
reg_write(priv, REG_ENA_AP, p->audio_cfg);
- reg_write(priv, REG_ENA_ACLK, p->audio_clk_cfg);
/* Set audio input source */
switch (p->audio_format) {
@@ -653,13 +670,29 @@ tda998x_configure_audio(struct tda998x_priv *priv,
clksel_aip = AIP_CLKSEL_AIP_SPDIF;
clksel_fs = AIP_CLKSEL_FS_FS64SPDIF;
cts_n = CTS_N_M(3) | CTS_N_K(3);
+ aclk = 0; /* no clock */
break;
case AFMT_I2S:
reg_write(priv, REG_MUX_AP, MUX_AP_SELECT_I2S);
clksel_aip = AIP_CLKSEL_AIP_I2S;
clksel_fs = AIP_CLKSEL_FS_ACLK;
- cts_n = CTS_N_M(3) | CTS_N_K(3);
+
+ /* with I2S input, the CTS_N predivider depends on
+ * the sample width */
+ switch (priv->audio_sample_format) {
+ case SNDRV_PCM_FORMAT_S16_LE:
+ cts_n = CTS_N_M(3) | CTS_N_K(1);
+ break;
+ default:
+ case SNDRV_PCM_FORMAT_S24_LE:
+ cts_n = CTS_N_M(3) | CTS_N_K(2);
+ break;
+ case SNDRV_PCM_FORMAT_S32_LE:
+ cts_n = CTS_N_M(3) | CTS_N_K(3);
+ break;
+ }
+ aclk = 1; /* clock enable */
break;
default:
@@ -671,6 +704,7 @@ tda998x_configure_audio(struct tda998x_priv *priv,
reg_clear(priv, REG_AIP_CNTRL_0, AIP_CNTRL_0_LAYOUT |
AIP_CNTRL_0_ACR_MAN); /* auto CTS */
reg_write(priv, REG_CTS_N, cts_n);
+ reg_write(priv, REG_ENA_ACLK, aclk);
/*
* Audio input somehow depends on HDMI line rate which is
@@ -727,6 +761,67 @@ tda998x_configure_audio(struct tda998x_priv *priv,
tda998x_write_aif(priv, p);
}
+/* tda998x audio codec interface */
+
+/* return the audio parameters extracted from the last EDID */
+int tda998x_get_audio(struct device *dev,
+ int *max_channels,
+ int *rate_mask,
+ int *fmt,
+ struct snd_pcm_hw_constraint_list **rate_constraints)
+{
+ struct tda998x_priv2 *priv2 = dev_get_drvdata(dev);
+ struct tda998x_priv *priv = &priv2->base;
+
+ if (!priv->encoder->crtc)
+ return -ENODEV;
+
+ *max_channels = priv->max_channels;
+ *rate_mask = priv->rate_mask;
+ *fmt = priv->fmt;
+ *rate_constraints = &priv->rate_constraints;
+ return 0;
+}
+EXPORT_SYMBOL(tda998x_get_audio);
+
+/* switch the audio port and initialize the audio parameters for streaming */
+void tda998x_audio_switch(struct device *dev,
+ int port_index,
+ unsigned sample_rate,
+ int sample_format)
+{
+ struct tda998x_priv2 *priv2 = dev_get_drvdata(dev);
+ struct tda998x_priv *priv = &priv2->base;
+ struct tda998x_encoder_params *p = &priv->params;
+
+ if (!priv->encoder->crtc)
+ return;
+
+ /*
+ * if port_index is negative (streaming stop),
+ * disable the audio port
+ */
+ if (port_index < 0) {
+ reg_write(priv, REG_ENA_AP, 0);
+ return;
+ }
+
+ /* if same audio parameters, just enable the audio port */
+ if (p->audio_cfg == priv->audio_ports[port_index] &&
+ p->audio_sample_rate == sample_rate &&
+ priv->audio_sample_format == sample_format) {
+ reg_write(priv, REG_ENA_AP, p->audio_cfg);
+ return;
+ }
+
+ p->audio_format = port_index;
+ p->audio_cfg = priv->audio_ports[port_index];
+ p->audio_sample_rate = sample_rate;
+ priv->audio_sample_format = sample_format;
+ tda998x_configure_audio(priv, &priv->encoder->crtc->hwmode, p);
+}
+EXPORT_SYMBOL(tda998x_audio_switch);
+
/* DRM encoder functions */
static void tda998x_encoder_set_config(struct tda998x_priv *priv,
@@ -746,6 +841,8 @@ static void tda998x_encoder_set_config(struct tda998x_priv *priv,
(p->mirr_f ? VIP_CNTRL_2_MIRR_F : 0);
priv->params = *p;
+ priv->audio_ports[p->audio_format] = p->audio_cfg;
+ priv->audio_sample_format = SNDRV_PCM_FORMAT_S24_LE;
}
static void tda998x_encoder_dpms(struct tda998x_priv *priv, int mode)
@@ -1128,6 +1225,47 @@ fail:
return NULL;
}
+static void tda998x_set_audio(struct tda998x_priv *priv,
+ struct drm_connector *connector)
+{
+ u8 *eld = connector->eld;
+ u8 *sad;
+ int sad_count;
+ unsigned eld_ver, mnl, rate_mask;
+ unsigned max_channels, fmt;
+
+ /* adjust the hw params from the ELD (EDID) */
+ eld_ver = eld[0] >> 3;
+ if (eld_ver != 2 && eld_ver != 31)
+ return;
+
+ mnl = eld[4] & 0x1f;
+ if (mnl > 16)
+ return;
+
+ sad_count = eld[5] >> 4;
+ sad = eld + 20 + mnl;
+
+ /* Start from the basic audio settings */
+ max_channels = 2;
+ rate_mask = 0;
+ fmt = 0;
+ while (sad_count--) {
+ switch (sad[0] & 0x78) {
+ case 0x08: /* PCM */
+ max_channels = max(max_channels, (sad[0] & 7) + 1u);
+ rate_mask |= sad[1];
+ fmt |= sad[2] & 0x07;
+ break;
+ }
+ sad += 3;
+ }
+
+ priv->max_channels = max_channels;
+ priv->rate_mask = rate_mask;
+ priv->fmt = fmt;
+}
+
static int
tda998x_encoder_get_modes(struct tda998x_priv *priv,
struct drm_connector *connector)
@@ -1139,6 +1277,12 @@ 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);
+
+ /* set the audio parameters from the EDID */
+ if (priv->is_hdmi_sink) {
+ drm_edid_to_eld(connector, edid);
+ tda998x_set_audio(priv, connector);
+ }
kfree(edid);
}
@@ -1173,6 +1317,8 @@ static void tda998x_destroy(struct tda998x_priv *priv)
if (priv->hdmi->irq)
free_irq(priv->hdmi->irq, priv);
+ if (priv->pdev_codec)
+ platform_device_del(priv->pdev_codec);
i2c_unregister_device(priv->cec);
}
@@ -1250,16 +1396,38 @@ static struct drm_encoder_slave_funcs tda998x_encoder_slave_funcs = {
/* I2C driver functions */
+static void tda998x_create_audio_codec(struct tda998x_priv *priv)
+{
+ struct platform_device *pdev;
+
+ request_module("snd-soc-tda998x");
+ pdev = platform_device_register_resndata(&priv->hdmi->dev,
+ "tda998x-codec",
+ PLATFORM_DEVID_NONE,
+ NULL, 0,
+ NULL, 0);
+ if (IS_ERR(pdev)) {
+ dev_err(&priv->hdmi->dev, "cannot create codec: %ld\n",
+ PTR_ERR(pdev));
+ return;
+ }
+
+ priv->pdev_codec = pdev;
+}
+
static int tda998x_create(struct i2c_client *client, struct tda998x_priv *priv)
{
struct device_node *np = client->dev.of_node;
u32 video;
- int rev_lo, rev_hi, ret;
+ int i, j, rev_lo, rev_hi, ret;
priv->vip_cntrl_0 = VIP_CNTRL_0_SWAP_A(2) | VIP_CNTRL_0_SWAP_B(3);
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;
priv->cec = i2c_new_dummy(client->adapter, 0x34);
@@ -1351,17 +1519,49 @@ static int tda998x_create(struct i2c_client *client, struct tda998x_priv *priv)
/* enable EDID read irq: */
reg_set(priv, REG_INT_FLAGS_2, INT_FLAGS_2_EDID_BLK_RD);
- if (!np)
- return 0; /* non-DT */
+ /* get the device tree parameters */
+ if (np) {
+
+ /* optional video properties */
+ ret = of_property_read_u32(np, "video-ports", &video);
+ if (ret == 0) {
+ priv->vip_cntrl_0 = video >> 16;
+ priv->vip_cntrl_1 = video >> 8;
+ priv->vip_cntrl_2 = video;
+ }
+
+ /* optional audio properties */
+ for (i = 0; i < 2; i++) {
+ u32 port;
+ const char *p;
- /* get the optional video properties */
- ret = of_property_read_u32(np, "video-ports", &video);
- if (ret == 0) {
- priv->vip_cntrl_0 = video >> 16;
- priv->vip_cntrl_1 = video >> 8;
- priv->vip_cntrl_2 = video;
+ ret = of_property_read_u32_index(np, "audio-ports",
+ i, &port);
+ if (ret)
+ break;
+ ret = of_property_read_string_index(np,
+ "audio-port-names",
+ i, &p);
+ if (ret) {
+ dev_err(&client->dev,
+ "missing audio-port-names[%d]\n", i);
+ break;
+ }
+ if (strcmp(p, "spdif") == 0) {
+ j = AFMT_SPDIF;
+ } else if (strcmp(p, "i2s") == 0) {
+ j = AFMT_I2S;
+ } else {
+ dev_err(&client->dev,
+ "bad audio-port-names '%s'\n", p);
+ break;
+ }
+ priv->audio_ports[j] = port;
+ }
}
+ tda998x_create_audio_codec(priv);
+
return 0;
fail:
@@ -1395,15 +1595,13 @@ static int tda998x_encoder_init(struct i2c_client *client,
encoder_slave->slave_priv = priv;
encoder_slave->slave_funcs = &tda998x_encoder_slave_funcs;
+ /* set the drvdata pointer to priv2 for CODEC calls */
+ dev_set_drvdata(&client->dev,
+ container_of(priv, struct tda998x_priv2, base));
+
return 0;
}
-struct tda998x_priv2 {
- struct tda998x_priv base;
- struct drm_encoder encoder;
- struct drm_connector connector;
-};
-
#define conn_to_tda998x_priv2(x) \
container_of(x, struct tda998x_priv2, connector);
diff --git a/include/drm/i2c/tda998x.h b/include/drm/i2c/tda998x.h
index 3e419d9..7db4c64 100644
--- a/include/drm/i2c/tda998x.h
+++ b/include/drm/i2c/tda998x.h
@@ -1,6 +1,8 @@
#ifndef __DRM_I2C_TDA998X_H__
#define __DRM_I2C_TDA998X_H__
+#include <sound/pcm_params.h>
+
struct tda998x_encoder_params {
u8 swap_b:3;
u8 mirr_b:1;
@@ -27,4 +29,14 @@ struct tda998x_encoder_params {
unsigned audio_sample_rate;
};
+/* audio codec interface */
+int tda998x_get_audio(struct device *dev,
+ int *max_channels,
+ int *rate_mask,
+ int *fmt,
+ struct snd_pcm_hw_constraint_list **rate_constraints);
+void tda998x_audio_switch(struct device *dev,
+ int port_index,
+ unsigned sample_rate,
+ int sample_format);
#endif
diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index 8ab1547..5928c4f 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -567,6 +567,9 @@ config SND_SOC_TAS5086
tristate "Texas Instruments TAS5086 speaker amplifier"
depends on I2C
+config SND_SOC_TDA998x
+ tristate
+
config SND_SOC_TLV320AIC23
tristate
diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile
index afba944..e7c2bec 100644
--- a/sound/soc/codecs/Makefile
+++ b/sound/soc/codecs/Makefile
@@ -100,6 +100,7 @@ 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-tlv320aic23-objs := tlv320aic23.o
snd-soc-tlv320aic23-i2c-objs := tlv320aic23-i2c.o
snd-soc-tlv320aic23-spi-objs := tlv320aic23-spi.o
@@ -272,6 +273,7 @@ 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_TLV320AIC23) += snd-soc-tlv320aic23.o
obj-$(CONFIG_SND_SOC_TLV320AIC23_I2C) += snd-soc-tlv320aic23-i2c.o
obj-$(CONFIG_SND_SOC_TLV320AIC23_SPI) += snd-soc-tlv320aic23-spi.o
diff --git a/sound/soc/codecs/tda998x.c b/sound/soc/codecs/tda998x.c
new file mode 100644
index 0000000..e5c3dce
--- /dev/null
+++ b/sound/soc/codecs/tda998x.c
@@ -0,0 +1,163 @@
+/*
+ * ALSA SoC TDA998X CODEC
+ *
+ * Copyright (C) 2014 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/i2c.h>
+#include <drm/i2c/tda998x.h>
+
+#define TDA998X_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
+ SNDRV_PCM_FMTBIT_S20_3LE | \
+ SNDRV_PCM_FMTBIT_S24_LE | \
+ SNDRV_PCM_FMTBIT_S32_LE)
+
+static int tda_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct device *dev = dai->dev;
+ int ret, max_channels, rate_mask, fmt;
+ u64 formats;
+ struct snd_pcm_hw_constraint_list *rate_constraints;
+ static const u32 hdmi_rates[] = {
+ 32000, 44100, 48000, 88200, 96000, 176400, 192000
+ };
+
+ /* get the EDID values and the rate constraints buffer */
+ ret = tda998x_get_audio(dev, &max_channels, &rate_mask, &fmt,
+ &rate_constraints);
+ if (ret < 0)
+ return ret; /* no screen */
+
+ /* convert the EDID values to audio constraints */
+ rate_constraints->list = hdmi_rates;
+ rate_constraints->count = ARRAY_SIZE(hdmi_rates);
+ rate_constraints->mask = rate_mask;
+ snd_pcm_hw_constraint_list(runtime, 0,
+ SNDRV_PCM_HW_PARAM_RATE,
+ rate_constraints);
+
+ formats = 0;
+ if (fmt & 1)
+ formats |= SNDRV_PCM_FMTBIT_S16_LE;
+ if (fmt & 2)
+ formats |= SNDRV_PCM_FMTBIT_S20_3LE;
+ if (fmt & 4)
+ formats |= SNDRV_PCM_FMTBIT_S24_LE;
+ snd_pcm_hw_constraint_mask64(runtime,
+ SNDRV_PCM_HW_PARAM_FORMAT,
+ formats);
+
+ snd_pcm_hw_constraint_minmax(runtime,
+ SNDRV_PCM_HW_PARAM_CHANNELS,
+ 1, max_channels);
+ return 0;
+}
+
+static int tda_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct device *dev = dai->dev;
+
+ tda998x_audio_switch(dev, dai->id,
+ params_rate(params), params_format(params));
+ return 0;
+}
+
+static void tda_shutdown(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct device *dev = dai->dev;
+
+ tda998x_audio_switch(dev, -1, 0, 0); /* stop */
+}
+
+static const struct snd_soc_dai_ops tda_ops = {
+ .startup = tda_startup,
+ .hw_params = tda_hw_params,
+ .shutdown = tda_shutdown,
+};
+
+static struct snd_soc_dai_driver tda998x_dais[] = {
+ {
+ .name = "spdif-hifi",
+ .id = AFMT_SPDIF,
+ .playback = {
+ .stream_name = "HDMI SPDIF Playback",
+ .channels_min = 1,
+ .channels_max = 2,
+ .rates = SNDRV_PCM_RATE_CONTINUOUS,
+ .rate_min = 22050,
+ .rate_max = 192000,
+ .formats = TDA998X_FORMATS,
+ },
+ .ops = &tda_ops,
+ },
+ {
+ .name = "i2s-hifi",
+ .id = AFMT_I2S,
+ .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 = &tda_ops,
+ },
+};
+
+static const struct snd_soc_dapm_widget tda_widgets[] = {
+ SND_SOC_DAPM_OUTPUT("hdmi-out"),
+};
+static const struct snd_soc_dapm_route tda_routes[] = {
+ { "hdmi-out", NULL, "HDMI I2S Playback" },
+ { "hdmi-out", NULL, "HDMI SPDIF Playback" },
+};
+
+static struct snd_soc_codec_driver soc_codec_tda998x = {
+ .dapm_widgets = tda_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(tda_widgets),
+ .dapm_routes = tda_routes,
+ .num_dapm_routes = ARRAY_SIZE(tda_routes),
+};
+
+static int tda998x_codec_dev_probe(struct platform_device *pdev)
+{
+ return snd_soc_register_codec(pdev->dev.parent,
+ &soc_codec_tda998x,
+ tda998x_dais, ARRAY_SIZE(tda998x_dais));
+}
+
+static int tda998x_codec_dev_remove(struct platform_device *pdev)
+{
+ snd_soc_unregister_codec(pdev->dev.parent);
+ return 0;
+}
+
+static struct platform_driver tda998x_codec = {
+ .driver = {
+ .name = "tda998x-codec",
+ .owner = THIS_MODULE,
+ },
+ .probe = tda998x_codec_dev_probe,
+ .remove = tda998x_codec_dev_remove,
+};
+
+module_platform_driver(tda998x_codec);
+
+MODULE_AUTHOR("Jean-Francois Moine <moinejf(a)free.fr>");
+MODULE_DESCRIPTION("NXP TDA998X CODEC");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:tda998x-codec");
--
2.1.0
