On Thu, 02 Dec 2021 15:55:04 +0100, Stephan Gerhold wrote: > There are two possible audio setups on MSM8916/APQ8016: Normally the audio > is routed through the audio/modem DSP (covered by the qdsp6 driver). During > upstreaming for the DragonBoard 410c it was decided to bypass it and > instead talk directly to the audio controller using the "lpass" driver. > > Bypassing the DSP gives more control about the audio configuration but limits > the functionality: For example, routing audio through the audio/modem DSP is > strictly required for voice call audio. Also, without the special changes in > the DB410c firmware other MSM8916 devices can only use the bypass as long as > the modem DSP is not started. Otherwise, the firmware will assume control of > the LPASS hardware block and audio is no longer functional. > > Add support for using the DSP audio setup instead using a new > "qcom,msm8916-qdsp6-sndcard" compatible. It is basically a mixture of > the apq8016-sbc-sndcard and the newer sm8250-sndcard, which uses > indirect QDSP6 DAI links instead of the direct LPASS DAI links. > > Cc: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx> > Signed-off-by: Stephan Gerhold <stephan@xxxxxxxxxxx> > --- > .../bindings/sound/qcom,sm8250.yaml | 42 +++++++++++++++++++ > 1 file changed, 42 insertions(+) > Reviewed-by: Rob Herring <robh@xxxxxxxxxx>
