While adding audio support to two instances of Display port on x13s,
hdmi-codec failed to add controls as two codec instances were trying
to add controls with same name.
snd-sc8280xp sound: control 3:16:0:IEC958 Playback Mask:0 is already present
snd-sc8280xp sound: control 3:16:0:Playback Channel Map:0 is already present
hdmi-audio-codec hdmi-audio-codec.4.auto: ASoC: error at snd_soc_pcm_dai_new on i2s-hifi: -16
To fix this issue, I have added a new api snd_pcm_add_chmap_ctls_with_prefix()
to allow to pass asoc component name prefix, which should provide a unique control
names. We can also make snd_pcm_add_chmap_ctls() take prefix argument to do the same
this.
Srinivas Kandagatla (3):
ALSA: pcm: add snd_pcm_add_chmap_ctls_with_prefix
ASoC: hdmi-codec: use snd_pcm_add_chmap_ctls_with_prefix to add
controls
ASoC: hdmi-codec: use snd_soc_cnew to add controls
include/sound/pcm.h | 7 +++++++
sound/core/pcm_lib.c | 30 ++++++++++++++++++++++++++++--
sound/soc/codecs/hdmi-codec.c | 10 ++++++----
3 files changed, 41 insertions(+), 6 deletions(-)
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2.21.0
