diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.19/950-0779-sound-soc-only-first-codec-is-master-in-multicodec-s.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.19/950-0779-sound-soc-only-first-codec-is-master-in-multicodec-s.patch | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.19/950-0779-sound-soc-only-first-codec-is-master-in-multicodec-s.patch b/target/linux/brcm2708/patches-4.19/950-0779-sound-soc-only-first-codec-is-master-in-multicodec-s.patch new file mode 100644 index 0000000000..dcfbb9dd1a --- /dev/null +++ b/target/linux/brcm2708/patches-4.19/950-0779-sound-soc-only-first-codec-is-master-in-multicodec-s.patch @@ -0,0 +1,34 @@ +From 4ca89eb8570cb86314a5a7b55a15d15f53ce5757 Mon Sep 17 00:00:00 2001 +From: Johannes Krude <johannes@krude.de> +Date: Sat, 16 Nov 2019 12:41:06 +0100 +Subject: [PATCH] sound/soc: only first codec is master in multicodec + setup + +When using multiple codecs, at most one codec should generate the master +clock. All codecs except the first are therefore configured for slave +mode. + +Signed-off-by: Johannes Krude <johannes@krude.de> +--- + sound/soc/soc-core.c | 9 ++++++++- + 1 file changed, 8 insertions(+), 1 deletion(-) + +--- a/sound/soc/soc-core.c ++++ b/sound/soc/soc-core.c +@@ -1688,8 +1688,15 @@ int snd_soc_runtime_set_dai_fmt(struct s + + for (i = 0; i < rtd->num_codecs; i++) { + struct snd_soc_dai *codec_dai = codec_dais[i]; ++ unsigned int codec_dai_fmt = dai_fmt; + +- ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt); ++ // there can only be one master when using multiple codecs ++ if (i && (codec_dai_fmt & SND_SOC_DAIFMT_MASTER_MASK)) { ++ codec_dai_fmt &= ~SND_SOC_DAIFMT_MASTER_MASK; ++ codec_dai_fmt |= SND_SOC_DAIFMT_CBS_CFS; ++ } ++ ++ ret = snd_soc_dai_set_fmt(codec_dai, codec_dai_fmt); + if (ret != 0 && ret != -ENOTSUPP) { + dev_warn(codec_dai->dev, + "ASoC: Failed to set DAI format: %d\n", ret); |