Return-path: Received: from mail-wi0-f175.google.com ([209.85.212.175]:38409 "EHLO mail-wi0-f175.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750978AbbCZGbB convert rfc822-to-8bit (ORCPT ); Thu, 26 Mar 2015 02:31:01 -0400 Received: by wibgn9 with SMTP id gn9so70921164wib.1 for ; Wed, 25 Mar 2015 23:31:00 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: <5512D58B.6030204@aoifes.com> References: <55128DF0.6010109@aoifes.com> <5512D58B.6030204@aoifes.com> Date: Thu, 26 Mar 2015 07:30:59 +0100 Message-ID: (sfid-20150326_073106_561490_1FD54987) Subject: Re: Dynamic channel Access From: Michal Kazior To: Jose Antonio Delgado Alfonso Cc: Kalle Valo , linux-wireless , "ath10k@lists.infradead.org" Content-Type: text/plain; charset=UTF-8 Sender: linux-wireless-owner@vger.kernel.org List-ID: On 25 March 2015 at 16:34, Jose Antonio Delgado Alfonso wrote: > Hi all, > > I would like to ask Qualcomm's collaborators about this topic. > > We are trying to certify a AP product which uses QCA988x radio module. > We are using the ath10k driver (kernel v3.17.8) and firmware from Ben > Greear. We are trying to pass the Dynamic Channel test, which consists > in setting the radio at 80MHz and, at the same time, setting other > signal in the secondary channel. So far, the radio module does not > reduce the bandwidth and remains transmitting at 80MHz. > > Please, Does someone know if Dynamic Channel Access is really supported > by ath10k driver in newest kernel versions? You haven't really defined what kind of "other signal" you set up. ath10k sets/enables dynamic_bw wmi parameter in ath10k_start(). From what I know dynamic_bw does enable fw/hw to downgrade traffic from 80MHz to 40MHz in case there's other 802.11 traffic on the subband happening at least on 10.1.467 - not sure about non-802.11 traffic. I suppose newer firmware revisions do that too. I'm not sure about 999.999.0.636 though. Michał