On 28/11/2023 17:56, Krzysztof Kozlowski wrote: > Currently the Qualcomm Soundwire controller in its DAI startup op > allocates the Soundwire stream runtime. This works fine for existing > designs, but has limitations for stream runtimes with multiple > controllers, like upcoming Qualcomm X1E80100 SoC with four WSA8840 > speakers on two Soundwire controllers. > > When two Soundwire controllers are added to sound card codecs, Soundwire > startup() is called twice, one for each Soundwire controller, and second > execution overwrites what was set before. During shutdown() this causes > double free. > > It is expected to have only one Soundwire stream runtime, thus it should > be allocated from SoC soundcard context startup(), not from each > Soundwire startup(). Such way will properly handle both cases: one and > two Soundwire controllers in the stream runtime. > > Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx> > > --- > > This is an entirely different approach than my previous try here: > https://lore.kernel.org/all/20231025144601.268645-1-krzysztof.kozlowski@xxxxxxxxxx/ ... and I forgot to thank you Pierre-Louis for patient explanation of the case in my previous try. Your review was much appreciated! Thank you. Best regards, Krzysztof
