From mboxrd@z Thu Jan 1 00:00:00 1970 From: Timur Tabi Subject: Re: [PATCH 2/3] ASoC: fsl_ssi: Add dual fifo mode support Date: Tue, 29 Oct 2013 07:42:41 -0500 Message-ID: <526FAD41.2000805@tabi.org> References: <02f8867363ed3038a0a70703856e4b642fef4339.1383047327.git.b42378@freescale.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <02f8867363ed3038a0a70703856e4b642fef4339.1383047327.git.b42378@freescale.com> Sender: linux-doc-owner@vger.kernel.org To: Nicolin Chen , shawn.guo@linaro.org, broonie@kernel.org Cc: linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, dmaengine@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, alsa-devel@alsa-project.org, rob.herring@calxeda.com, mark.rutland@arm.com, swarren@wwwdotorg.org, pawel.moll@arm.com, ijc+devicetree@hellion.org.uk, s.hauer@pengutronix.de, b32955@freescale.com List-Id: devicetree@vger.kernel.org Nicolin Chen wrote: > By enabling dual fifo mode, it would allow SSI enter a better performance > to transimit/receive data without occasional hardware underrun/overrun. Have you measured any real performance gain with this patch? I considered adding dual-FIFO support when I originally wrote this driver, but it didn't appear to have any real benefit, but it used twice as many DMA channels. I'm concerned that this is another patch that just enables a useless feature.