On Thu, Apr 02, 2009 at 10:39:12AM +0300, Jarkko Nikula wrote:
Hrm, does the chip support asymmetric configurations for playback and capture?
My two cents: It supports different sampling rates for ADC and DAC but I don't believe there is practical use or HW doing this. In this setup there is separate word clock signal on GPIO1 for ADC.
Hrm, that's fairly common for hardware - even with shared LRCLK many devices will be able to support asymmetric rates providing there are enough BCLKs to drive the data. Presumably the only limit in the codec itself is going to be that whatever the PLL is set for will be the maximum.
Being a bit stricter than is required probaly won't hurt; someone can always relax things later on if required.
Unfortunately I'm bit off from the actual issue here but I remember some TI codec had requirement to keep DAC/ADC off while changing the configuration...
Yes, that's the issue that Daniel is fixing here - it's not possible to change the clocking (or at least the PLL) while a DAC or ADC is active.