RE: rtw89: RTL8852BE P2P-device iftype and STA+P2P interface combination

[Ping-Ke Shih <pkshih@realtek.com>]

Doug Brewer <brewer.doug@gmail.com> wrote:
> Hi,
> 
> I'm experimenting with Wi-Fi Display (Miracast sink) concurrent with an
> STA connection on an RTL8852BE (PCIe) using the mainline rtw89 driver
> (kernel 6.18.37).
> 
> iw phy reports:
> Supported interface modes:
>    * managed, AP, P2P-client, P2P-GO
>    (no P2P-device)
> interface combinations are not supported
> 
> In practice this blocks the standard P2P flow: there is no P2P-device
> iftype for a dedicated discovery context, and no advertised interface
> combination for managed + P2P-client coexistence.
> 
> My questions:
> 1. is P2P-device iftype support planned for rtw89 on RTL885x? Is there a
>     known technical blocker, or is it simply not yet implemented?

We are planning to add P2P-device iftype. It needs to consider the cases of 
channel context, conditions of power save, and etc. It will take some time. 

I think it would be okay that you use STA interface to do P2P negotiation,
and then create P2P-client or P2P-GO iftype then.

> 2. would advertising a managed + P2P-client interface combination
>     (single channel) be feasible on the current rtw89?

This is a SCC which is supported.

> 3. is MCC (#channels > 1) on the roadmap, or considered out of scope?

Current support MCC as well. However, we are cooking new firmware to support
hw_scan with two operation channels -- which doesn't matter if you don't need
to do scan when MCC is operating.

Ping-Ke