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 moinejf@free.fr --- drivers/gpu/drm/i2c/tda998x_drv.c | 25 +++++++++++++++++++++---- include/drm/i2c/tda998x.h | 5 ++++- sound/soc/codecs/tda998x.c | 19 +++++++++++++++---- 3 files changed, 40 insertions(+), 9 deletions(-)
diff --git a/drivers/gpu/drm/i2c/tda998x_drv.c b/drivers/gpu/drm/i2c/tda998x_drv.c index 92cbc40..ee17d42 100644 --- a/drivers/gpu/drm/i2c/tda998x_drv.c +++ b/drivers/gpu/drm/i2c/tda998x_drv.c @@ -21,6 +21,7 @@ #include <linux/module.h> #include <linux/irq.h> #include <sound/asoundef.h> +#include <sound/pcm_params.h>
#include <drm/drmP.h> #include <drm/drm_crtc_helper.h> @@ -47,6 +48,8 @@ struct tda998x_priv { volatile int wq_edid_wait; struct drm_encoder *encoder;
+ int audio_sample_format; + u8 *eld; };
@@ -663,7 +666,18 @@ 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;
@@ -744,13 +758,14 @@ 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); @@ -762,11 +777,13 @@ 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 7f21749..181388d 100644 --- a/sound/soc/codecs/tda998x.c +++ b/sound/soc/codecs/tda998x.c @@ -13,6 +13,7 @@ #include <linux/module.h> #include <sound/soc.h> #include <sound/pcm.h> +#include <sound/pcm_params.h> #include <linux/of.h> #include <linux/i2c.h> #include <drm/drm_encoder_slave.h> @@ -61,7 +62,8 @@ static void tda_get_encoder(struct tda_priv *priv) priv->i2c_client = i2c_client; }
-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;
@@ -76,7 +78,7 @@ 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; }
@@ -156,9 +158,17 @@ 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, @@ -167,11 +177,12 @@ 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, };