Return-path: Received: from smtp.codeaurora.org ([198.145.29.96]:39382 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753155AbeCBFOb (ORCPT ); Fri, 2 Mar 2018 00:14:31 -0500 From: Kalle Valo To: Arend van Spriel Cc: Tamizh chelvam , johannes@sipsolutions.net, linux-wireless@vger.kernel.org Subject: Re: [PATCH 1/2] cfg80211: Add support to enable or disable btcoex References: <1519927170-11920-1-git-send-email-tamizhr@codeaurora.org> <5A9856CE.8000005@broadcom.com> Date: Fri, 02 Mar 2018 07:14:27 +0200 In-Reply-To: <5A9856CE.8000005@broadcom.com> (Arend van Spriel's message of "Thu, 1 Mar 2018 20:38:54 +0100") Message-ID: <87po4ndpos.fsf@purkki.adurom.net> (sfid-20180302_061436_117442_F00B6098) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-wireless-owner@vger.kernel.org List-ID: Arend van Spriel writes: > On 3/1/2018 6:59 PM, Tamizh chelvam wrote: >> From: Tamizh chelvam >> >> This patch introduces NL80211_CMD_SET_BTCOEX command and >> NL80211_ATTR_BTCOEX_OP attribute to enable or disable btcoex. > > What kind of btcoex are we talking about here? Is it signalling > between wlan and bt to get access to the shared RF. Yes, at least that's how I understand this. > Why would it require user-space interaction? Are there no options for > wlan to detect bt is in use, ie. bt hci is setup, and vice versa. Can > it be indicated in platform data or device tree. Trying to understand > the use-case here. One use case is being able to disable btcoex in case of problems or to test if it's btcoex related. I think during the last five years the need for this interface has come every once in a while. -- Kalle Valo