On Tue, Jan 14, 2014 at 08:34:10PM +0100, Daniel Matuschek wrote:
WM8804 can run with PLL frequencies of 256xfs and 128xfs for most sample rates. At 192kHz only 128xfs is supported. The existing driver selects 128xfs automatically for some lower samples rates. By using an additional mclk_div divider, it is now possible to control the behaviour. This allows using 256xfs PLL frequency on all sample rates up to 96kHz. It should allow lower jitter and better signal quality. The behavior has to be controlled by the sound card driver, because some sample frequency share the same setting. e.g. 192kHz and 96kHz use 24.576MHz master clock. The only difference is the MCLK divider.
Signed-off-by: Daniel Matuschek daniel@matuschek.net
Acked-by: Charles Keepax ckeepax@opensource.wolfsonmicro.com
Sorry about the slight delay travelling with limited internet at the mo.
Thanks, Charles