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=-8.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,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 AABD4C33CB1 for ; Sun, 19 Jan 2020 15:14:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7CB80206D7 for ; Sun, 19 Jan 2020 15:14:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727403AbgASPOU (ORCPT ); Sun, 19 Jan 2020 10:14:20 -0500 Received: from bhuna.collabora.co.uk ([46.235.227.227]:56602 "EHLO bhuna.collabora.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727007AbgASPOT (ORCPT ); Sun, 19 Jan 2020 10:14:19 -0500 Received: from [IPv6:2804:431:e7cc:d244:9e0a:75ab:540f:cbbe] (unknown [IPv6:2804:431:e7cc:d244:9e0a:75ab:540f:cbbe]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: koike) by bhuna.collabora.co.uk (Postfix) with ESMTPSA id 9302C28A0E6; Sun, 19 Jan 2020 15:14:13 +0000 (GMT) Subject: Re: [PATCH] staging: media: rkisp1: make links immutable by default To: =?UTF-8?Q?Niklas_S=c3=b6derlund?= Cc: linux-media@vger.kernel.org, hverkuil-cisco@xs4all.nl, kernel@collabora.com, laurent.pinchart@ideasonboard.com, tfiga@chromium.org, Mauro Carvalho Chehab , devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org, Greg Kroah-Hartman References: <20200117201218.3745311-1-helen.koike@collabora.com> <20200117223634.GJ1074550@oden.dyn.berto.se> From: Helen Koike Autocrypt: addr=helen.koike@collabora.com; keydata= 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bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org On 1/17/20 8:36 PM, Niklas Söderlund wrote: > Hi Helen, > > Thanks for your work. > > On 2020-01-17 17:12:18 -0300, Helen Koike wrote: >> The only places which make sese to allow users to enable or disable >> links are: >> >> * between sensors and isp: >> So users can select which sensor should be used while streaming >> >> * between isp and the resizers: >> | >> v here >> rkisp1_isp:2 -> rkisp1_resizer_mainpath -> rkisp1_mainpath (capture) >> \-> rkisp1_resizer_selfpath -> rkisp1_selfpath (capture) >> ^ here >> | >> >> So users can disable one of the capture paths when unused, to avoid >> worring about matching formats. >> >> Make the following links immutable to simplify userspace: >> >> rkisp1_resizer_mainpath -> rkisp1_mainpath >> rkisp1_resizer_selfpath -> rkisp1_selfpath >> rkisp1_params -> rkisp1_isp >> rkisp1_isp -> rkisp1_stats >> >> Signed-off-by: Helen Koike >> >> --- >> This is the topology graph after disabling all the links with >> media -r >> http://col.la/rkisp1immutable >> >> Dashed links are the only one can can be enabled/disabled, the others >> are immutable. >> >> drivers/staging/media/rkisp1/rkisp1-dev.c | 5 +++-- >> 1 file changed, 3 insertions(+), 2 deletions(-) >> >> diff --git a/drivers/staging/media/rkisp1/rkisp1-dev.c b/drivers/staging/media/rkisp1/rkisp1-dev.c >> index 558126e66465..4030d5e71af1 100644 >> --- a/drivers/staging/media/rkisp1/rkisp1-dev.c >> +++ b/drivers/staging/media/rkisp1/rkisp1-dev.c >> @@ -145,14 +145,15 @@ static int rkisp1_create_links(struct rkisp1_device *rkisp1) >> flags = 0; >> } >> >> - flags = MEDIA_LNK_FL_ENABLED; >> + flags = MEDIA_LNK_FL_ENABLED | MEDIA_LNK_FL_IMMUTABLE; >> >> /* create ISP->RSZ->CAP links */ >> for (i = 0; i < 2; i++) { >> source = &rkisp1->isp.sd.entity; >> sink = &rkisp1->resizer_devs[i].sd.entity; > > nit: To keep with the style of the rest of the function I would set > flags here and once more bellow in the same loop. Do you mean this: http://ix.io/27Pm ? hmm, I don't see why to assign flags inside the loop. the previous loop is a different case, since it sets the link to the first sensor as enabled, but the other sensor links are disabled (in case there are more then one link). > > With or without this fixed, > > Reviewed-by: Niklas Söderlund Thanks, Helen > >> ret = media_create_pad_link(source, RKISP1_ISP_PAD_SOURCE_VIDEO, >> - sink, RKISP1_RSZ_PAD_SINK, flags); >> + sink, RKISP1_RSZ_PAD_SINK, >> + MEDIA_LNK_FL_ENABLED); >> if (ret) >> return ret; >> >> -- >> 2.24.0 >> >