From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from smtp-vbr4.xs4all.nl ([194.109.24.24]:4378 "EHLO smtp-vbr4.xs4all.nl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751884Ab3JUTkR (ORCPT ); Mon, 21 Oct 2013 15:40:17 -0400 Message-ID: <52658303.5050900@xs4all.nl> Date: Mon, 21 Oct 2013 19:39:47 +0000 From: Hans Verkuil MIME-Version: 1.0 To: Ricardo Ribalda Delgado CC: linux-pwm@vger.kernel.org, Milo Kim , Paul Walmsley , Andy Walls , Linux LED Subsystem , Sakari Ailus , Oliver Schinagl , Hans Verkuil , linux-media , Richard Purdie , media-workshop@linuxtv.org, Laurent Pinchart , Bryan Wu , Bryan Wu , Sylwester Nawrocki , Thierry Reding Subject: Re: [media-workshop] V2: Agenda for the Edinburgh mini-summit References: <201309101134.32883.hansverk@cisco.com> <3335821.8epFKWiJXY@avalon> <2523390.YEHU3IBNqR@avalon> <525DF0C7.9090407@ti.com> <525F2311.8000509@ti.com> <1381968755.1905.25.camel@palomino.walls.org> <526577FA.7070602@xs4all.nl> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-media-owner@vger.kernel.org List-ID: On 10/21/2013 07:29 PM, Ricardo Ribalda Delgado wrote: > I thought that i was second... You are right, I was looking at an older version. The LED topic is third, around 9:50. Sorry for the confusion. btw could i borrow somebodys notebook for presenting the slides? Sure. Put them on a USB stick or make them available on the web for download and I can present them for you. I've saved the slides you mailed me earlier to my laptop. Regards, Hans > > Thanks > > On 21 Oct 2013 19:53, "Hans Verkuil" > wrote: > > On 10/21/2013 06:40 PM, Bryan Wu wrote: > > On Sat, Oct 19, 2013 at 1:25 PM, Ricardo Ribalda Delgado > > > wrote: > >> Please find the multi selection api proposal attached. > >> > >> See you in Edinburgh. > >> > >> > >> Thanks > >> > >> On Sat, Oct 19, 2013 at 2:17 AM, Bryan Wu > wrote: > >>> On Wed, Oct 16, 2013 at 5:12 PM, Andy Walls > wrote: > >>>> On Thu, 2013-10-17 at 08:36 +0900, Milo Kim wrote: > >>>> > >>>>>> That's current solution, we plan to unify this two API since those > >>>>>> chip are basically LED. > >>>>>> > >>>>>>> On the other hands, LM3642 has an indicator mode with flash/torch. > >>>>>>> Then, it will consist of 3 parts - MFD core, LED(indicator) and > >>>>>>> V4L2(flash/torch). > >>>>>>> > >>>>>> > >>>>>> So if one LED device driver can support that, we don't need these 3 parts. > >>>>> > >>>>> Let me clarify our discussion briefly. > >>>>> > >>>>> For the flash and torch, there are scattered user-space APIs. > >>>>> We need to unify them. > >>>> > >>>> Sorry for the late input. > >>>> > >>>> There are also subject matter illuminators (is that the same as torch?). > >>>> They may be LED or halogen incadescent bulbs that are integral to a > >>>> device such as the QX5 microscope: > >>>> > >>>> http://git.linuxtv.org/media_tree.git/blob/HEAD:/drivers/media/usb/cpia2/cpia2_v4l.c#l1152 > >>>> > >>>> The V4L2 user controls ioctl()'s are used to control those two lamps > >>>> currently. Their activation seemed like a switch the user would want to > >>>> turn easily, via a GUI that contained other V4L2 device controls. > >>>> > >>>> Do these fit in anywhere into the unification? Not that I'm advocating > >>>> that. I just thought cases like this shouldn't be overlooked in deciding > >>>> what to do. > >>>> > >>>> Regards, > >>>> Andy > >>>> > >>>>> We are considering supporting V4L2 structures in the LED camera trigger. > >>>>> Then, camera application controls the flash/torch via not the LED sysfs > >>>>> but the V4L2 ioctl interface. > >>>>> So, changing point is the ledtrig-camera.c. No chip driver changes at all. > >>>>> > >>>>> Is it correct? > >>>>> > >>>>> Best regards, > >>>>> Milo > >>>> > >>>> > >>> > >>> Please find my proposal attached and probably my colleague Paul > >>> Walmsley will show up for this media mini summit if he is available. > >>> > >>> Thanks, > >>> -Bryan > >> > >> > > > > Is the time and location of media mini-summit fixed? My colleague > > might show up if it's not conflicted with ARM mini-summit. > > It's in the Glamis room on Wednesday. We start at 9 am and the LED topic > is currently scheduled as the second topic so I expect that it will be > discussed between 9 and 10 am. > > Regards, > > Hans >