Re: [PATCH v3] rtl8xxxu: add bluetooth co-existence support for single antenna

From: Kalle Valo
Date: Wed Oct 09 2019 - 04:26:24 EST

Chris Chiu <chiu@xxxxxxxxxxxx> wrote:

> The RTL8723BU suffers the wifi disconnection problem while bluetooth
> device connected. While wifi is doing tx/rx, the bluetooth will scan
> without results. This is due to the wifi and bluetooth share the same
> single antenna for RF communication and they need to have a mechanism
> to collaborate.
> BT information is provided via the packet sent from co-processor to
> host (C2H). It contains the status of BT but the rtl8723bu_handle_c2h
> dose not really handle it. And there's no bluetooth coexistence
> mechanism to deal with it.
> This commit adds a workqueue to set the tdma configurations and
> coefficient table per the parsed bluetooth link status and given
> wifi connection state. The tdma/coef table comes from the vendor
> driver code of the RTL8192EU and RTL8723BU. However, this commit is
> only for single antenna scenario which RTL8192EU is default dual
> antenna. The rtl8xxxu_parse_rxdesc24 which invokes the handle_c2h
> is only for 8723b and 8192e so the mechanism is expected to work
> on both chips with single antenna. Note RTL8192EU dual antenna is
> not supported.
> Signed-off-by: Chris Chiu <chiu@xxxxxxxxxxxx>
> Signed-off-by: Jes Sorensen <Jes.Sorensen@xxxxxxxxx>

Patch applied to wireless-drivers-next.git, thanks.

e542e66b7c2e rtl8xxxu: add bluetooth co-existence support for single antenna