From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754453Ab1G0Kf4 (ORCPT ); Wed, 27 Jul 2011 06:35:56 -0400 Received: from mga09.intel.com ([134.134.136.24]:60450 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753743Ab1G0Kfy (ORCPT ); Wed, 27 Jul 2011 06:35:54 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.67,275,1309762800"; d="scan'208";a="32559264" Date: Wed, 27 Jul 2011 13:36:09 +0300 From: Mika Westerberg To: "Koul, Vinod" Cc: Jaswinder Singh , "Williams, Dan J" , Linus Walleij , linux-kernel@vger.kernel.org, rmk+kernel@arm.linux.org.uk, linus.walleij@stericsson.com, per.friden@stericsson.com, wei.zhang@freescale.com, ebony.zhu@freescale.com, iws@ovro.caltech.edu, s.hauer@pengutronix.de, maciej.sosnowski@intel.com, saeed@marvell.com, shawn.guo@freescale.com, yur@emcraft.com, agust@denx.de, iwamatsu.nobuhiro@renesas.com, per.forlin@stericsson.com, jonas.aberg@stericsson.com, anemo@mba.ocn.ne.jp Subject: Re: [PATCHv2] DMAEngine: Let dmac drivers to set chan_id Message-ID: <20110727103609.GC16623@intel.com> References: <1311740499.1536.56.camel@vkoul-udesk3> <1311757347.1536.103.camel@vkoul-udesk3> <20110727095909.GB16623@intel.com> <1311759264.1536.113.camel@vkoul-udesk3> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1311759264.1536.113.camel@vkoul-udesk3> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jul 27, 2011 at 03:04:24PM +0530, Koul, Vinod wrote: > Is this a dma controller limitation or due to the fact even channels get > assigned h/w interface corresponding to TX and so on. I think the later but not sure how it is implemented in hw. The documentation only states that even channels are for TX and odd for RX. There is no way of changing the direction as far I can tell.