On Thu, Sep 05, 2019 at 12:06:23AM +0900, Katsuhiro Suzuki wrote: > Would you tell me one more thing. I don't understand who sets MCLK to 0. > Is it needed original machine driver instead of audio-graph-card? > On my test environment (audio-graph-card + Rockchip I2S + ES8316), it > seems audio-graph-card has never called set_sysclk() with freq = 0 after > stop play/capture sound. So my env will go to bad scenario as I described in > this patch. You shouldn't need a custom machine driver - you'll just be the first person who ran into this with audio-graph-card. I'd just add this support to the audio-graph-card, either with custom startup and shutdown callbacks or using a set_bias_level() callback (both get used, I'd guess the set_bias_level() is easier since you don't need to reference count anything).
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