On Sun, Sep 22, 2019 at 02:43:19PM -0400, Sasha Levin wrote:
From: Katsuhiro Suzuki <katsuhiro@xxxxxxxxxxxxx>
[ Upstream commit ebe02a5b9ef05e3b812af3d628cdf6206d9ba610 ]
This patch supports some type of machine drivers that set 0 to mclk
when sound device goes to idle state. After applied this patch,
sysclk == 0 means there is no constraint of sound rate and other
values will set constraints which is derived by sysclk setting.
This is a new feature and clearly out of scope for stable.