Hi Olivier Thank you for conntacting me > I have seen that the STM32MP15 audio sound card is no more functional > with recent kernels (5.13 or 5.14) > The sound card is registered, but the all devices are issuing an error > at runtime. These devices are using stm32_sai.c or stm32_i2s.c > drivers. > > I found that the regression is linked to the commit > 63f2f9cceb09f8e5f668e36c1cf764eea468ebed "ASoC: audio-graph: remove > Platform support", as reverting this commit fixes the issue. > > When the platform component is missing the pcm_construct ops in the > pcm dmaengine, is never called, resulting in an incomplete > initialization of the sound card. > I can't figure out what is the right way to handle this change, however. > Do I need to update the CPU drivers to work without a platform component > or does the audio-graph card has to be changed in some way ? Ahh, OK, I see. Indeed the dev which is used for CPU is used at soc-generic-dmaengine as Platform, without indicating it at DT (= simple-card has "plat" support for platform at DT, but audio-graph doesn't ). I think key funciton is asoc_simple_canonicalize_platform(). > What do you mean "We can respawn it when we need it", in the commit > message ? This means we can revert this patch if needed, and yes it is needed :) Could you please respawn the feature ? or I can do it if you want. Thank you for your help !! Best regards --- Kuninori Morimoto
