From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S935020AbdKPNmh (ORCPT ); Thu, 16 Nov 2017 08:42:37 -0500 Received: from mail.micronovasrl.com ([212.103.203.10]:49197 "EHLO mail.micronovasrl.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932599AbdKPNm0 (ORCPT ); Thu, 16 Nov 2017 08:42:26 -0500 Authentication-Results: mail.micronovasrl.com (amavisd-new); dkim=pass reason="pass (just generated, assumed good)" header.d=micronovasrl.com Subject: Re: [linux-sunxi] Cedrus driver To: Maxime Ripard Cc: Hans Verkuil , Andreas Baierl , linux-sunxi , linux@armlinux.org.uk, wens@csie.org, linux-kernel@vger.kernel.org, thomas@vitsch.nl, linux-media@vger.kernel.org References: <1510059543-7064-1-git-send-email-giulio.benetti@micronovasrl.com> <1b12fa21-bfe6-9ba7-ae1d-8131ac6f4668@micronovasrl.com> <6fcdc0d9-d0f8-785a-bb00-b1b41c684e59@imkreisrum.de> <693e8786-af83-9d77-0fd4-50fa1f6a135f@micronovasrl.com> <20171116110204.poakahqjz4sj7pmu@flea> <5fcf64db-c654-37d0-5863-20379c04f99c@micronovasrl.com> <20171116125310.yavjs7352nw2sm7r@flea> <6f94505d-69bb-6688-4b13-6a0ed2af8dd4@xs4all.nl> <20171116133906.xsrpkdflgf34kkoy@flea> From: Giulio Benetti Message-ID: Date: Thu, 16 Nov 2017 14:42:23 +0100 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.4.0 MIME-Version: 1.0 In-Reply-To: <20171116133906.xsrpkdflgf34kkoy@flea> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Language: it Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, Il 16/11/2017 14:39, Maxime Ripard ha scritto: > On Thu, Nov 16, 2017 at 02:17:08PM +0100, Giulio Benetti wrote: >> Hi Hans, >> >> Il 16/11/2017 14:12, Hans Verkuil ha scritto: >>> On 16/11/17 13:57, Giulio Benetti wrote: >>>> Il 16/11/2017 13:53, Maxime Ripard ha scritto: >>>>> On Thu, Nov 16, 2017 at 01:30:52PM +0100, Giulio Benetti wrote: >>>>>>> On Thu, Nov 16, 2017 at 11:37:30AM +0100, Giulio Benetti wrote: >>>>>>>> Il 16/11/2017 11:31, Andreas Baierl ha scritto: >>>>>>>>> Am 16.11.2017 um 11:13 schrieb Giulio Benetti: >>>>>>>>>> Hello, >>>>>>>>>> >>>>>>>>> Hello, >>>>>>>>>> I'm wondering why cedrus >>>>>>>>>> https://github.com/FlorentRevest/linux-sunxi-cedrus has never been >>>>>>>>>> merged with linux-sunxi sunxi-next. >>>>>>>>>> >>>>>>>>> Because it is not ready to be merged. It depends on the v4l2 request >>>>>>>>> API, which was not merged and which is re-worked atm. >>>>>>>>> Also, sunxi-cedrus itself is not in a finished state and is not as >>>>>>>>> feature-complete to be merged. Anyway it might be something for >>>>>>>>> staging... Has there been a [RFC] on the mailing list at all? >>>>>>>> >>>>>>>> Where can I find a list of TODOs to get it ready to be merged? >>>>>>> >>>>>>> Assuming that the request API is in, we'd need to: >>>>>>> - Finish the MPEG4 support >>>>>>> - Work on more useful codecs (H264 comes to my mind) >>>>>>> - Implement the DRM planes support for the custom frame format >>>>>>> - Implement the DRM planes support for scaling >>>>>>> - Test it on more SoCs >>>>>>> >>>>>>> Or something along those lines. >>>>>> >>>>>> Lot of work to do >>>>> >>>>> Well... If it was fast and easy it would have been done already :) >>>> >>>> :)) >>>> >>>>> >>>>>>>>>> I see it seems to be dead, no commit in 1 year. >>>>>>>>> >>>>>>>>> Yes, because the author did this during an internship, which ended ... >>>>>>>>> Afaik nobody picked up his work yet. >>>>>>> >>>>>>> That's not entirely true. Some work has been done by Thomas (in CC), >>>>>>> especially on the display engine side, but last time we talked his >>>>>>> work was not really upstreamable. >>>>>>> >>>>>>> We will also resume that effort starting next march. >>>>>> >>>>>> Is it possible a preview on a separate Reporitory to start working on now? >>>>>> Expecially to start porting everything done by FlorentRevest to mainline, >>>>>> admitted you've not already done. >>>>> >>>>> I'm not sure what you're asking for. Florent's work *was* on mainline. >>>> >>>> and then they took it off because it was unmantained? >>>> You've spoken about Thomas(in CC) not ready, >>>> maybe I could help on that if it's public to accelerate. >>>> If I'm able to of course, this is my primary concern. >>>> >>>> Otherwise, in which way can I help improving it to make it accept to linux-sunxi? >>>> Starting from Florent's work and porting it to sunxi-next to begin? >>>> And after that adding all features you've listed? >>>> Tell me what I can do(I repeat, if I'm able to). >>> >>> The bottleneck is that the Request API is not mainlined. We restarted work >>> on it after a meeting a few weeks back where we all agreed on the roadmap >>> so hopefully it will go into mainline Q1 or Q2 next year. >>> >>> That said, you can use Florent's patch series for further development. >>> It should be relatively easy to convert it to the final version of the >>> Request API. Just note that the public API of the final Request API will >>> be somewhat different from the old version Florent's patch series is using. >> >> So I'm going to try soon to : >> 1) adapt that patchset to sunxi-next >> 2) add A20 support >> 3) add A33 support >> 4) after mainlined APIs, merge > > That sounds good. Thomas already has the support for the A20, and as I > was saying, there is someone that is going to work full time on this > in a couple monthes on our side. > > I'll set up a git repo on github so that we can collaborate until the > request API is ready. Great! Write me when you've got news. Thank you very much! > > Maxime > -- Giulio Benetti R&D Manager & Advanced Research MICRONOVA SRL Sede: Via A. Niedda 3 - 35010 Vigonza (PD) Tel. 049/8931563 - Fax 049/8931346 Cod.Fiscale - P.IVA 02663420285 Capitale Sociale € 26.000 i.v. Iscritta al Reg. Imprese di Padova N. 02663420285 Numero R.E.A. 258642