In some boards, with I2S input, the NXP TDA998x HDMI transmitter did
not play audio streams with a sample width lower than S16_32.
This patch adjusts the CTS_N predivider according to the used sample
width.
Signed-off-by: Jean-Francois Moine <moin...@free.fr>
---
drivers/gpu/drm/i2c/tda998x_drv.c | 25 +++++++++++++++++++++----
include/drm/i2c/tda998x.h | 5 ++++-
sound/soc/codecs/tda998x.c | 18 ++++++++++++++----
3 files changed, 39 insertions(+), 9 deletions(-)
diff --git a/drivers/gpu/drm/i2c/tda998x_drv.c
b/drivers/gpu/drm/i2c/tda998x_drv.c
index b833fa5..66013ba 100644
--- a/drivers/gpu/drm/i2c/tda998x_drv.c
+++ b/drivers/gpu/drm/i2c/tda998x_drv.c
@@ -22,6 +22,7 @@
#include <linux/irq.h>
#include <linux/of_platform.h>
#include <sound/asoundef.h>
+#include <sound/pcm_params.h>
#include <drm/drmP.h>
#include <drm/drm_crtc_helper.h>
@@ -48,6 +49,8 @@ struct tda998x_priv {
volatile int wq_edid_wait;
struct drm_encoder *encoder;
+ int audio_sample_format;
+
u8 *eld;
};
@@ -664,7 +667,18 @@ tda998x_configure_audio(struct tda998x_priv *priv,
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);
+ switch (priv->audio_sample_format) {
+ case SNDRV_PCM_FORMAT_S16_LE:
+ cts_n = CTS_N_M(3) | CTS_N_K(1);
+ break;
+ case SNDRV_PCM_FORMAT_S24_LE:
+ cts_n = CTS_N_M(3) | CTS_N_K(2);
+ break;
+ default:
+ case SNDRV_PCM_FORMAT_S32_LE:
+ cts_n = CTS_N_M(3) | CTS_N_K(3);
+ break;
+ }
aclk = 1; /* clock enable */
break;
@@ -745,13 +759,14 @@ EXPORT_SYMBOL_GPL(tda998x_audio_get_eld);
void tda998x_audio_update(struct i2c_client *client,
int format,
- int port)
+ int port,
+ struct snd_pcm_hw_params *params)
{
struct tda998x_priv *priv = i2c_get_clientdata(client);
struct tda998x_encoder_params *p = &priv->params;
/* if the audio output is active, it may be a second start or a stop */
- if (format == 0 || priv->audio_active) {
+ if (format == 0 || !params || priv->audio_active) {
if (format == 0) {
priv->audio_active = 0;
reg_write(priv, REG_ENA_AP, 0);
@@ -763,11 +778,13 @@ void tda998x_audio_update(struct i2c_client *client,
p->audio_cfg = port;
/* don't restart audio if same input format */
- if (format == p->audio_format) {
+ if (format == p->audio_format &&
+ params_format(params) == priv->audio_sample_format) {
reg_write(priv, REG_ENA_AP, p->audio_cfg);
return;
}
p->audio_format = format;
+ priv->audio_sample_format = params_format(params);
tda998x_configure_audio(priv, &priv->encoder->crtc->hwmode, p);
}
diff --git a/include/drm/i2c/tda998x.h b/include/drm/i2c/tda998x.h
index 99387ae..62b838f 100644
--- a/include/drm/i2c/tda998x.h
+++ b/include/drm/i2c/tda998x.h
@@ -27,8 +27,11 @@ struct tda998x_encoder_params {
unsigned audio_sample_rate;
};
+struct snd_pcm_hw_params;
+
u8 *tda998x_audio_get_eld(struct i2c_client *client);
void tda998x_audio_update(struct i2c_client *client,
int format,
- int port);
+ int port,
+ struct snd_pcm_hw_params *params);
#endif
diff --git a/sound/soc/codecs/tda998x.c b/sound/soc/codecs/tda998x.c
index 0493163..a1de35d 100644
--- a/sound/soc/codecs/tda998x.c
+++ b/sound/soc/codecs/tda998x.c
@@ -47,7 +47,8 @@ static int tda_get_encoder(struct tda_priv *priv)
return 0;
}
-static int tda_start_stop(struct tda_priv *priv)
+static int tda_start_stop(struct tda_priv *priv,
+ struct snd_pcm_hw_params *params)
{
int port;
@@ -56,7 +57,7 @@ static int tda_start_stop(struct tda_priv *priv)
port = priv->ports[0];
else
port = priv->ports[1];
- tda998x_audio_update(priv->i2c_client, priv->dai_id, port);
+ tda998x_audio_update(priv->i2c_client, priv->dai_id, port, params);
return 0;
}
@@ -136,9 +137,17 @@ static int tda_startup(struct snd_pcm_substream *substream,
stream->channels_max = max_channels;
stream->formats = formats;
}
+ return 0;
+}
+
+static int tda_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct tda_priv *priv = snd_soc_codec_get_drvdata(dai->codec);
/* start the TDA998x audio */
- return tda_start_stop(priv);
+ return tda_start_stop(priv, params);
}
static void tda_shutdown(struct snd_pcm_substream *substream,
@@ -147,11 +156,12 @@ static void tda_shutdown(struct snd_pcm_substream
*substream,
struct tda_priv *priv = snd_soc_codec_get_drvdata(dai->codec);
priv->dai_id = 0; /* streaming stop */
- tda_start_stop(priv);
+ tda_start_stop(priv, NULL);
}
static const struct snd_soc_dai_ops tda_ops = {
.startup = tda_startup,
+ .hw_params = tda_hw_params,
.shutdown = tda_shutdown,
};
--
1.9.rc1
--
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