Messages in this thread | ![/](/images/icornerl.gif) | | Date | Tue, 23 Apr 2024 16:59:56 +0100 | Subject | Re: [PATCH v2 0/4] ASoC: qcom: display port changes | From | Srinivas Kandagatla <> |
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On 23/04/2024 15:58, Johan Hovold wrote: >> It is absolutely possible to run all the streams in parallel from the >> Audio hardware and DSP point of view. >> >> One thing to note is, On Qualcomm DP IP, we can not read/write registers >> if the DP port is not connected, which means that we can not send data >> in such cases. >> >> This makes it challenging to work with sound-servers like pipewire or >> pulseaudio as they tend to send silence data at very early stages in the >> full system boot up, ignoring state of the Jack events. > This bit sounds like it can and should be worked around by the driver to > avoid hard-coding policy which would prevent use cases such as the ones > mentioned above. This is not simple as you say. We have to fit these into a proper DPCM. Either we have a dummy Backend connected for each of these pcm sub-devices when DP port is not connected and then switch back to DP when its connected.
Or somehow find a way to not let the pipewire talk to devices which are not connected.
thanks, srini
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