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ASoC: fsl_spdif: Clear the validity bit for TX 

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 <shengjiu.wang@nxp.com>
Link: https://lore.kernel.org/r/1594112066-31297-2-git-send-email-shengjiu.wang@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Shengjiu Wang 2020-07-07 16:54:25 +08:00 committed by Mark Brown
parent 0382437646
commit 055b082156
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GPG Key ID: 24D68B725D5487D0
1 changed files with 4 additions and 0 deletions
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4
sound/soc/fsl/fsl_spdif.c
View File

@ -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;
}