From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Hemanth V" Subject: Re: omap3evm: touchscreen delays on pm branch Date: Fri, 27 Nov 2009 11:35:23 +0530 Message-ID: <01cd01ca6f27$9c13a020$LocalHost@wipultra793> References: Mime-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit Return-path: Received: from arroyo.ext.ti.com ([192.94.94.40]:43186 "EHLO arroyo.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751798AbZK0GFW (ORCPT ); Fri, 27 Nov 2009 01:05:22 -0500 Received: from dbdp31.itg.ti.com ([172.24.170.98]) by arroyo.ext.ti.com (8.13.7/8.13.7) with ESMTP id nAR65PVu009636 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Fri, 27 Nov 2009 00:05:28 -0600 Sender: linux-omap-owner@vger.kernel.org List-Id: linux-omap@vger.kernel.org To: "Premi, Sanjeev" , linux-omap@vger.kernel.org ----- Original Message ----- From: "Premi, Sanjeev" To: Sent: Thursday, November 26, 2009 10:32 PM Subject: omap3evm: touchscreen delays on pm branch > Hi, > > I am finding the response of touchscreen on the omap3evm very slow. > > Here is my test: > On console, I run : watch -n2 "cat /proc/interrupts" > Then, I tap the touchscreen approximately once per second. However, > (usually) no interrupts are registered. As I increase the frequency > of 'taps' more and more interrupts are registered. But still not > matching exact taps. > > However, when I keep the cpu busy with "cat /dev/zero > /dev/null &" > each tap is recognized. > > EVM uses GPIO175 for touchscreen. I notice that Zoom2 uses GPIO102. > Both are not on BANK0. > > Is the behavior same on ZOOM2 as well? I dont see this problem on Zoom2/Zoom3, I am able to see interrupts being incremented for every touch. > > Best regards, > Sanjeev > -- > To unsubscribe from this list: send the line "unsubscribe linux-omap" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html >