From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 695E6919 for ; Mon, 1 Aug 2016 13:12:59 +0000 (UTC) Received: from galahad.ideasonboard.com (galahad.ideasonboard.com [185.26.127.97]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id 0CD5529A for ; Mon, 1 Aug 2016 13:12:59 +0000 (UTC) From: Laurent Pinchart To: Steven Rostedt Date: Mon, 01 Aug 2016 16:12:58 +0300 Message-ID: <28278780.EQdhaNUfNW@avalon> In-Reply-To: <20160729215906.3b7a0983@grimm.local.home> References: <20160728114624.GE4094@quack2.suse.cz> <20160729215906.3b7a0983@grimm.local.home> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" Cc: ksummit-discuss@lists.linuxfoundation.org, Mauro Carvalho Chehab , "vegard.nossum@gmail.com" , "rafael.j.wysocki" , Marek Szyprowski , Valentin Rothberg Subject: Re: [Ksummit-discuss] [TECH TOPIC] Addressing complex dependencies and semantics (v2) List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Friday 29 Jul 2016 21:59:06 Steven Rostedt wrote: > On Thu, 28 Jul 2016 13:46:24 +0200 Jan Kara wrote: > > So I'm complete outsider to media drivers so maybe my question is stupid > > but I cannot resist: So how is the device bringup supposed to work for > > devices where you have these cycles in the dependency graph? Do you just > > bring up the controller and then the sensor and it works because the > > controller doesn't need the clock from the sensor for startup? > > Thanks for asking. I was wondering the exact same thing. If this doesn't get addressed during a tech session, I'd be glad to explain this for both V4L2 and DRM in the hallway track to anyone interested. If the crowd gets large then a room with a white board or a projector could help though. -- Regards, Laurent Pinchart