[alsa-devel] r8a7790 only has audio when clock is forced on

Kuninori Morimoto kuninori.morimoto.gx at renesas.com
Fri Jun 6 07:54:40 CEST 2014


Hi Ben, Violeta

> >>          reg =   <0 0xec500000 0 0x1000>, /* SCU */
> >>                  <0 0xec5a0000 0 0x100>,  /* ADG */
> >>                  <0 0xec540000 0 0x1000>, /* SSIU */
> >>                  <0 0xec541000 0 0x1280>; /* SSI */
> >>          clocks = <&mstp10_clks R8A7790_CLK_SSI>,
> >
> > I don't think we have this one here.
> 
> Indeed. Adding it fixed our issue.

Phew, nice !
Sorry for my poor English which causes delay solution.


> >>   - SSI(ALL) is called via pm_runtime_xxx() from sound driver
> >>   - SRC(ALL) is called as parent clock of SRCn clocks
> >
> > See, this is why I /hate/ the implicit clock management. This is
> > another case where we're getting bitten by it.

I troubled about this ALL bit too,
then, it become current style.

One reason was that
this driver is supporting Gen1 sound too.
But, this SRC(ALL) didn't exist on Gen1..


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