[PATCH 1/2] ASoC: fsl_spdif: Clear the validity bit for TX
From: Shengjiu Wang <hidden>
Date: 2020-07-07 08:58:53
Also in:
alsa-devel, lkml
Subsystem:
freescale soc sound drivers, sound, sound - soc layer / dynamic audio power management (asoc), the rest · Maintainers:
Shengjiu Wang, Xiubo Li, Jaroslav Kysela, Takashi Iwai, Liam Girdwood, Mark Brown, Linus Torvalds
In IEC958 spec, "The validity bit is logical "0" if the information in the main data field is reliable, and it is logical "1" if it is not". The default value of "ValCtrl" is zero, which means "Outgoing Validity always set", then all the data is not reliable, then some spdif sink device will drop the data. So set "ValCtrl" to 1, that is to clear "Outgoing Validity" in default. Signed-off-by: Shengjiu Wang <redacted> --- sound/soc/fsl/fsl_spdif.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/sound/soc/fsl/fsl_spdif.c b/sound/soc/fsl/fsl_spdif.c
index 9fb95c6ee7ba..576370dc6e70 100644
--- a/sound/soc/fsl/fsl_spdif.c
+++ b/sound/soc/fsl/fsl_spdif.c@@ -985,6 +985,10 @@ static int fsl_spdif_dai_probe(struct snd_soc_dai *dai) snd_soc_add_dai_controls(dai, fsl_spdif_ctrls, ARRAY_SIZE(fsl_spdif_ctrls)); + /*Clear the val bit for Tx*/ + regmap_update_bits(spdif_private->regmap, REG_SPDIF_SCR, + SCR_VAL_MASK, SCR_VAL_CLEAR); + return 0; }
--
2.21.0