On Fri, Feb 26, 2021 at 01:58:12PM +0800, Shengjiu Wang wrote:
On Tue, Feb 23, 2021 at 9:58 PM Mark Brown broonie@kernel.org wrote:
I'm not sure having two DAIs is an issue if you have them running the smae format - does it cause any practical problems or is it just that it doesn't seem elegant to you? There were quite a few devices that pretty much just had two unidirectional DAIs, in those cases it seems like a sensible representation for the hardware. If you can set unrelated formats on transmit and receive then it's not clear that it's actually the same DAI in anything except logical labelling.
When an i2s device, Sometimes it is connected as async mode, there is different clock for tx and rx then there should be two DAIs, Sometimes it is connected as sync mode, then there should be one DAI.
So we need to register different DAIs according to the async or sync mode when the driver probes. right?
You should just be able to connect the same device twice for the other end of the link, once for Tx and once for Rx.