Re: [PATCH v3 1/4] ASoC: qcom: common: Add qcom_snd_tdm_hw_params function

[Jianhua Lu]

On Thu, Dec 14, 2023 at 03:56:52PM +0000, Mark Brown wrote:
> On Thu, Dec 14, 2023 at 11:51:50PM +0800, Jianhua Lu wrote:
> > On Thu, Dec 14, 2023 at 11:11:06AM +0000, Mark Brown wrote:
> 
> > > The expectation is that TDM is set up by the machine driver, not from
> > > hw_params - if the TDM setup can be changed from within hw_params then
> > > it's hard to see how it's going to interact well with other TDM users on
> > > the bus.  More usually hw_params() would be influenced by the setup done
> > > in set_tdm_slot().
> 
> > Currently, qcom TDM setup need to read hw_params, if we want to move it
> > to machine driver, we must hardcode some params, but it will reduce reduce
> > readability.
> 
> What makes you say that TDM setup needs to read hw_params?

qcom_snd_tdm_hw_params function read PCM_FORMAT to set slot_width value, read
channels to set rx_mask value.