Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753414AbaJQQdT (ORCPT ); Fri, 17 Oct 2014 12:33:19 -0400 Received: from saturn.retrosnub.co.uk ([178.18.118.26]:45215 "EHLO saturn.retrosnub.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752472AbaJQQdS (ORCPT ); Fri, 17 Oct 2014 12:33:18 -0400 User-Agent: K-9 Mail for Android In-Reply-To: <5440F282.8040306@itdev.co.uk> References: <5440F282.8040306@itdev.co.uk> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Subject: Re: Touch processing on host CPU From: Jonathan Cameron Date: Fri, 17 Oct 2014 17:33:01 +0100 To: Nick Dyer , Dmitry Torokhov , Greg KH CC: "linux-input@vger.kernel.org" , "linux-kernel@vger.kernel.org" Message-ID: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On October 17, 2014 11:42:10 AM GMT+01:00, Nick Dyer wrote: >Hi- > >I'm trying to find out which subsystem maintainer I should be talking >to - >apologies if I'm addressing the wrong people. > >There is a model for doing touch processing where the touch controller >becomes a much simpler device which sends out raw acquisitions (over >SPI >at up to 1Mbps + protocol overheads). All touch processing is then done >in >user space by the host CPU. An example of this is NVIDIA DirectTouch - >see: >http://blogs.nvidia.com/blog/2012/02/24/industry-adopts-nvidia-directtouch/ > >In the spirit of "upstream first", I'm trying to figure out how to get >a >driver accepted. Obviously it's not an input device in the normal >sense. Is >it acceptable just to send the raw touch data out via a char device? Is >there another subsystem which is a good match (eg IIO)? Possibly... > Does the >protocol >(there is ancillary/control data as well) need to be documented? Do you know of a suitable ADC frontend? Preferably with docs. Interesting bit is the data format and these ancillary parts. > >cheers -- Sent from my Android phone with K-9 Mail. Please excuse my brevity. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/