Hi Caesar, Am Freitag, 8. Januar 2016, 17:26:18 schrieb Caesar Wang: > ? 2016?01?07? 18:05, Heiko Stuebner ??: > > Am Donnerstag, 7. Januar 2016, 16:25:47 schrieb Caesar Wang: > >> SCLk_I2S_OUT is the noc bus clock for i2s module, this clock is used by > >> extra codecs. > >> > >> Due to it shouldn't belong to any driver, but we need it enabled, > >> so just mark it as the CLK_IGNORE_UNUSED flag. > > > > What makes you think it shouldn't belong to any driver? > > > > In most schematics I have, i2s_clkout is going to some clock-input of > > the > > audio codec - probably the MCLK input on your rt5616. And while the new > > rt5616 driver does not seem to do clock handling, it should just handle > > the clock using the normal APIs. > > You are right, that's seem has to find the root cause. > I'm wonder that the codec/i2s is working in kernel v4.1 patch without it. > > In general, the MLCK will be handled in i2s driver if the cpu side is > master. looking at the rt5616 datasheet, that would be BCLK1 instead I think. This one does differentiate between being master/slave. The master/sysclk (mclk) is also handled in other drivers in all cases. (da7213.c, da7219.c, max98090.c, max98095.c, probably more) Heiko
