Messages in this thread | | | Date | Thu, 19 Oct 2023 15:39:26 -0500 | Subject | Re: [PATCH v9 30/34] ASoC: qcom: qdsp6: Add SND kcontrol for fetching offload status | From | Pierre-Louis Bossart <> |
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>>>> Add a kcontrol to the platform sound card to fetch the current offload >>>> status. This can allow for userspace to ensure/check which USB SND >>>> resources are actually busy versus having to attempt opening the USB >>>> SND >>>> devices, which will result in an error if offloading is active. >>> >>> I think I mentioned this a while back, but why not add the status in the >>> USB card itself? That's a generic component that all userspace agent >>> could query. Having a QCOM-specific control doesn't make the life of >>> userspace easier IMHO. >>> >>> >> >> Will take a look at this based on the comments you had in the other >> kcontrol patch. Seeing if we can move it to a more generic layer. >> > > I think it would make more sense to see if we can keep all the offload > kcontrols under the sound card exposed by the platform. Especially, if > we are going to modify the components string of the card to signify that > it supports USB offload.
A two-way relationship would be ideal, i.e. - the USB card has an indicator that it's currently bound with another "platform" card that offers optimized offloaded capabilities. - the platform card has a indicator that it exposes one or more PCM devices routed to the USB card endpoint.
Android/HAL would typically start with the latter while other more generic solutions would start from the former.
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