On Wed, Aug 19, 2020 at 11:15:32AM +0200, Stephan Gerhold wrote:
In some cases we need to probe additional audio components that do not appear as part of the DAI links specified in the device tree. Examples for this are auxiliary devices such as analog amplifiers or codecs.
To make them work they need to be added as part of "aux-devs" and connected to some other audio component using the audio routes configurable using "(qcom,)audio-routing".
Cc: Srinivas Kandagatla srinivas.kandagatla@linaro.org Signed-off-by: Stephan Gerhold stephan@gerhold.net
.../devicetree/bindings/sound/qcom,apq8016-sbc.txt | 7 +++++++ Documentation/devicetree/bindings/sound/qcom,apq8096.txt | 8 ++++++++ Documentation/devicetree/bindings/sound/qcom,sdm845.txt | 8 ++++++++ 3 files changed, 23 insertions(+)
diff --git a/Documentation/devicetree/bindings/sound/qcom,apq8016-sbc.txt b/Documentation/devicetree/bindings/sound/qcom,apq8016-sbc.txt index 84b28dbe9f15..23998262a0a7 100644 --- a/Documentation/devicetree/bindings/sound/qcom,apq8016-sbc.txt +++ b/Documentation/devicetree/bindings/sound/qcom,apq8016-sbc.txt @@ -34,6 +34,13 @@ Required properties: * DMIC * Ext Spk
+Optional properties:
+- aux-devs : A list of phandles for auxiliary devices (e.g. analog
amplifiers) that do not appear directly within the DAIlinks. Should be connected to another audio componentusing "qcom,audio-routing".Dai-link subnode properties and subnodes:
Required dai-link subnodes: diff --git a/Documentation/devicetree/bindings/sound/qcom,apq8096.txt b/Documentation/devicetree/bindings/sound/qcom,apq8096.txt index c814e867850f..248df5056fec 100644 --- a/Documentation/devicetree/bindings/sound/qcom,apq8096.txt +++ b/Documentation/devicetree/bindings/sound/qcom,apq8096.txt @@ -55,6 +55,14 @@ This binding describes the APQ8096 sound card, which uses qdsp for audio. Value type: <stringlist> Definition: The user-visible name of this sound card.
+- aux-devs
- Usage: optional
- Value type: <phandles with arguments>
How do you know how many arguments? It either has to be fixed or needs a #.*cells in the phandles. For the latter, you'd need to come up with a common binding.
- Definition: A list of phandles for auxiliary devices (e.g. analog
amplifiers) that do not appear directly within the DAIlinks. Should be connected to another audio componentusing "audio-routing".= dailinks Each subnode of sndcard represents either a dailink, and subnodes of each dailinks would be cpu/codec/platform dais. diff --git a/Documentation/devicetree/bindings/sound/qcom,sdm845.txt b/Documentation/devicetree/bindings/sound/qcom,sdm845.txt index ca8c89e88bfa..3d5cbe953cf7 100644 --- a/Documentation/devicetree/bindings/sound/qcom,sdm845.txt +++ b/Documentation/devicetree/bindings/sound/qcom,sdm845.txt @@ -24,6 +24,14 @@ This binding describes the SDM845 sound card, which uses qdsp for audio. Value type: <stringlist> Definition: The user-visible name of this sound card.
+- aux-devs
- Usage: optional
- Value type: <phandles with arguments>
- Definition: A list of phandles for auxiliary devices (e.g. analog
amplifiers) that do not appear directly within the DAIlinks. Should be connected to another audio componentusing "audio-routing".= dailinks Each subnode of sndcard represents either a dailink, and subnodes of each dailinks would be cpu/codec/platform dais. -- 2.28.0