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SubjectRe: [EXTERNAL] Re: [PATCH v3 4/4] ASoc: dt-bindings: PCM6240: Add initial DT binding
On Wed, Feb 07, 2024 at 10:53:28AM +0100, Krzysztof Kozlowski wrote:
> On 07/02/2024 10:47, Ding, Shenghao wrote:

> > dix4192 is not traditional ADC or DAC, but an Integrated Digital Audio Interface
> > Receiver and Transmitter, like an audio bridge to connect different digital audio
> > protocol, compatible with the AES3, S/PDIF, IEC 60958, and EIAJ CP-1201
> > interface standards, Left-Justified, Right-Justified, and Philips I2S™ Data Formats.
> > So keep it alone for professional purpose.

> Hm, it is a bit surprising to see some PCM6240-compatible devices 100%
> different from other PCM6240-compatible. PCM6240 is ADC. DIX4192 is not
> ADC, not even DAC. How can it be compatible with PCM6240 in such case?

I don't know about this specific example but many modern CODECs have a
substantial digital component which can usefully be used separately to
the analog components in some system designs, sometimes that's still got
the digital parts of the ADCs/DACs as PDM inputs and outputs are used
but not always even that. We have some devices that are just pure
S/PDIF bridges in tree already, and the WM8996 is an example of a CODEC
with only PDM.
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