From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.4 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E858FC4332B for ; Mon, 23 Mar 2020 12:24:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B034C2076A for ; Mon, 23 Mar 2020 12:24:53 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b="IDFdIFAv" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727534AbgCWMYx (ORCPT ); Mon, 23 Mar 2020 08:24:53 -0400 Received: from perceval.ideasonboard.com ([213.167.242.64]:47360 "EHLO perceval.ideasonboard.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727508AbgCWMYx (ORCPT ); Mon, 23 Mar 2020 08:24:53 -0400 Received: from pendragon.ideasonboard.com (81-175-216-236.bb.dnainternet.fi [81.175.216.236]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 2938B308; Mon, 23 Mar 2020 13:24:51 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1584966291; bh=fYrO17nHPKqzL8PPnuGfhX7S38RVaT63tXdVPjmw3M8=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=IDFdIFAv6tNA8yjOP0kRnDkW28ltV8QsrqKuuMecxBL4+75Gjl0SJB8bGhvT9cTs3 ux1+pldFEE//IZLIsJzQPvvfQp4TamjdDyIItYkV/KnTdaAZDMGXE3FaeYwe+IyXrW HOS92xzx09hLODH8InBv/9/FeRaYhJGF3o8HdMAY= Date: Mon, 23 Mar 2020 14:24:42 +0200 From: Laurent Pinchart To: Pavel Machek Cc: sean@mess.org, hverkuil-cisco@xs4all.nl, mchehab+samsung@kernel.org, mchehab@kernel.org, sakari.ailus@linux.intel.com, linux-media@vger.kernel.org Subject: Re: [PATCH] Minimal libv4l2 support for complex cameras Message-ID: <20200323122442.GD12103@pendragon.ideasonboard.com> References: <20200323114727.GA31063@amd> <20200323115753.GC12103@pendragon.ideasonboard.com> <20200323122216.GA18697@duo.ucw.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20200323122216.GA18697@duo.ucw.cz> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Hi Pavel, On Mon, Mar 23, 2020 at 01:22:17PM +0100, Pavel Machek wrote: > > On Mon, Mar 23, 2020 at 12:47:27PM +0100, Pavel Machek wrote: > >> Hi! > >> > >> We now have easy-to-install support for complex camera in form of > >> Maemo Leste on N900.... Unfortunately we don't have anything in > >> userspace that can be used to work with the camera. > >> > >> This attempts to be minimal solution to get libv4l2 to work. > > > > libv4l2 is mostly deprecated. How about contributing an OMAP3 ISP > > pipeline handler to libcamera instead ? :-) > > Why should it be instead? > > I need something for kernel testing, and there is ton of apps using > it. Let me do this. libcamera might be future, but... Sure, if it's useful for you, I won't prevent you from developing any code you want :-) But there's very little chance of getting it merged, and it would be useful to more people to have a support for that platform in libcamera. It's really your decision, and I'm not blaming you. > >> It enables passing camera pipeline description to libv4l2, so that > >> controls are mapped to appopriate devices, and libv4l2 can be used > >> with complex camera. > >> > >> It is useful for testing kernel parts of N900 subsystem, and it will > >> serve as a basis for autofocus work and autogain improvements. > >> > >> Signed-off-by: Pavel Machek -- Regards, Laurent Pinchart