From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964922AbdKPNRT (ORCPT ); Thu, 16 Nov 2017 08:17:19 -0500 Received: from mail.micronovasrl.com ([212.103.203.10]:47947 "EHLO mail.micronovasrl.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934875AbdKPNRK (ORCPT ); Thu, 16 Nov 2017 08:17:10 -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: Hans Verkuil , Maxime Ripard Cc: 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> From: Giulio Benetti Message-ID: Date: Thu, 16 Nov 2017 14:17:08 +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: <6f94505d-69bb-6688-4b13-6a0ed2af8dd4@xs4all.nl> 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 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 Alright? Regards > > Regards, > > Hans > >> >>> >>> Maxime >>> >> >> Thank you >> > -- 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