From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751734AbcFXNse (ORCPT ); Fri, 24 Jun 2016 09:48:34 -0400 Received: from zencphosting06.zen.co.uk ([82.71.204.9]:52568 "EHLO zencphosting06.zen.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751415AbcFXNsc (ORCPT ); Fri, 24 Jun 2016 09:48:32 -0400 Subject: Re: [PATCH v5 1/9] [media] v4l2-core: Add support for touch devices To: Dmitry Torokhov , Hans Verkuil References: <1466633313-15339-1-git-send-email-nick.dyer@itdev.co.uk> <1466633313-15339-2-git-send-email-nick.dyer@itdev.co.uk> Cc: linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, Benjamin Tissoires , Benson Leung , Alan Bowens , Javier Martinez Canillas , Chris Healy , Henrik Rydberg , Andrew Duggan , James Chen , Dudley Du , Andrew de los Reyes , sheckylin@chromium.org, Peter Hutterer , Florian Echtler , mchehab@osg.samsung.com From: Nick Dyer Message-ID: <1c9fda7b-441b-0110-bd10-b1b654e016de@itdev.co.uk> Date: Fri, 24 Jun 2016 14:48:14 +0100 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.1.1 MIME-Version: 1.0 In-Reply-To: <1466633313-15339-2-git-send-email-nick.dyer@itdev.co.uk> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit X-OutGoing-Spam-Status: No, score=-1.5 X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - zencphosting06.zen.co.uk X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - itdev.co.uk X-Get-Message-Sender-Via: zencphosting06.zen.co.uk: authenticated_id: nick.dyer@itdev.co.uk X-Authenticated-Sender: zencphosting06.zen.co.uk: nick.dyer@itdev.co.uk Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 22/06/2016 23:08, Nick Dyer wrote: > Some touch controllers send out touch data in a similar way to a > greyscale frame grabber. > > Use a new device prefix v4l-touch for these devices, to stop generic > capture software from treating them as webcams. > > Add formats: > - V4L2_TCH_FMT_DELTA_TD16 for signed 16-bit touch deltas > - V4L2_TCH_FMT_DELTA_TD08 for signed 16-bit touch deltas > - V4L2_TCH_FMT_TU16 for unsigned 16-bit touch data > - V4L2_TCH_FMT_TU08 for unsigned 8-bit touch data > > This support will be used by: > * Atmel maXTouch (atmel_mxt_ts) > * Synaptics RMI4. > * sur40 > > Signed-off-by: Nick Dyer > --- [...] > diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h > index 8f95191..7e19782 100644 > --- a/include/uapi/linux/videodev2.h > +++ b/include/uapi/linux/videodev2.h > @@ -143,6 +143,7 @@ enum v4l2_buf_type { > V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE = 10, > V4L2_BUF_TYPE_SDR_CAPTURE = 11, > V4L2_BUF_TYPE_SDR_OUTPUT = 12, > + V4L2_BUF_TYPE_TOUCH_CAPTURE = 13, > /* Deprecated, do not use */ > V4L2_BUF_TYPE_PRIVATE = 0x80, > }; > @@ -440,6 +441,8 @@ struct v4l2_capability { > #define V4L2_CAP_ASYNCIO 0x02000000 /* async I/O */ > #define V4L2_CAP_STREAMING 0x04000000 /* streaming I/O ioctls */ > > +#define V4L2_CAP_TOUCH 0x00100000 /* Is a touch device */ Apologies, this should have been #define V4L2_CAP_TOUCH 0x10000000 You will find my changes to v4l2-compliance to support these changes here: https://github.com/ndyer/v4l-utils I've tested the atmel_mxt_ts version of this with v4l2-compliance on Pixel 2.