From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joonyoung Shim Subject: Re: A question about touchscreen absmax value Date: Tue, 17 Nov 2009 12:00:08 +0900 Message-ID: <4B0211B8.4020508@samsung.com> References: <4B00B08E.2030905@samsung.com> <20091116171202.GC24026@core.coreip.homeip.net> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7BIT Return-path: Received: from mailout5.samsung.com ([203.254.224.35]:50575 "EHLO mailout5.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752530AbZKQDAD (ORCPT ); Mon, 16 Nov 2009 22:00:03 -0500 Received: from epmmp2 (mailout5.samsung.com [203.254.224.35]) by mailout1.samsung.com (iPlanet Messaging Server 5.2 Patch 2 (built Jul 14 2004)) with ESMTP id <0KT800EZYGC7AE@mailout1.samsung.com> for linux-input@vger.kernel.org; Tue, 17 Nov 2009 12:00:08 +0900 (KST) Received: from TNRNDGASPAPP1.tn.corp.samsungelectronics.net ([165.213.149.150]) by mmp2.samsung.com (iPlanet Messaging Server 5.2 Patch 2 (built Jul 14 2004)) with ESMTPA id <0KT80057TGC7MV@mmp2.samsung.com> for linux-input@vger.kernel.org; Tue, 17 Nov 2009 12:00:07 +0900 (KST) In-reply-to: <20091116171202.GC24026@core.coreip.homeip.net> Sender: linux-input-owner@vger.kernel.org List-Id: linux-input@vger.kernel.org To: Dmitry Torokhov Cc: linux-input@vger.kernel.org On 11/17/2009 2:12 AM, Dmitry Torokhov wrote: > Hi Joonyoung, > > On Mon, Nov 16, 2009 at 10:53:18AM +0900, Joonyoung Shim wrote: >> Hi, all. >> >> I have a question about touchscreen resolution. My touchscreen device >> can report the position from 0 to 1023 of x and y coordinates, so i >> setted the absmax of input device to 1023. BTW, i only can get from 0 to >> 479 x position and to 799 y position because the LCD resolution of the >> target is 480 x 800. I wonder which value is setted to the absmax - 479 >> and 799 or 1023. > > I believe driver should, by default, set absmin and absmax to match the > limits of the hardware/protocol. In your case it would be 1023. The > driver may choose to accept additional infromation from platform data, if > present, you can also adjust absmin/absmax etc via ioctl durng the > bootup sequence. Hmm, i get the resolution information from platform data, so i can set absmax values from platform data. Is it ok? Thanks for reply.