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=-5.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no 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 79361C432BE for ; Fri, 23 Jul 2021 11:57:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5D70B60ED4 for ; Fri, 23 Jul 2021 11:57:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234784AbhGWLQl (ORCPT ); Fri, 23 Jul 2021 07:16:41 -0400 Received: from ni.piap.pl ([195.187.100.5]:35942 "EHLO ni.piap.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234451AbhGWLQg (ORCPT ); Fri, 23 Jul 2021 07:16:36 -0400 Received: from t19.piap.pl (OSB1819.piap.pl [10.0.9.19]) by ni.piap.pl (Postfix) with ESMTPSA id 7AE0CC369544; Fri, 23 Jul 2021 13:57:06 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 ni.piap.pl 7AE0CC369544 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=piap.pl; s=mail; t=1627041426; bh=vuAgIbn22S6VoWGus1J/IkA7Gg1Mflh/eOqFu0Jq2jw=; h=From:To:Cc:Subject:References:Date:In-Reply-To:From; b=FRTLrB5o3jmt0cVDDTY9OmYIAsp/mc8oi/aLBlithBkkpDvhk2pkdxwWM+BHMk8hl bYq1i3NNxMb1TCNFDxY9eoCKDAHv5qIMVOoSMvZ0BnFDm1Ki5c04fnq7gVzP/wLF4q Ck600txfPGD7w1QLUrEDoqaep/iMNwTglE7FCwuw= From: =?utf-8?Q?Krzysztof_Ha=C5=82asa?= To: Hans Verkuil Cc: Tim Harvey , Mauro Carvalho Chehab , linux-media@vger.kernel.org, lkml Subject: Re: [PATCH REPOST] TDA1997x: replace video detection routine References: <68bd6e41-4c32-240f-aa83-fd2b96929d45@xs4all.nl> <798b2128-24a6-1a62-f98c-f228134e8d5c@xs4all.nl> Sender: khalasa@piap.pl Date: Fri, 23 Jul 2021 13:57:06 +0200 In-Reply-To: <798b2128-24a6-1a62-f98c-f228134e8d5c@xs4all.nl> (Hans Verkuil's message of "Fri, 23 Jul 2021 10:49:01 +0200") Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-KLMS-Rule-ID: 1 X-KLMS-Message-Action: clean X-KLMS-AntiSpam-Lua-Profiles: 165191 [Jul 23 2021] X-KLMS-AntiSpam-Version: 5.9.20.0 X-KLMS-AntiSpam-Envelope-From: khalasa@piap.pl X-KLMS-AntiSpam-Rate: 0 X-KLMS-AntiSpam-Status: not_detected X-KLMS-AntiSpam-Method: none X-KLMS-AntiSpam-Auth: dkim=pass header.d=piap.pl X-KLMS-AntiSpam-Info: LuaCore: 449 449 5db59deca4a4f5e6ea34a93b13bc730e229092f4, {Tracking_Text_ENG_RU_Has_Extended_Latin_Letters, eng}, {Tracking_marketers, three}, {Tracking_from_domain_doesnt_match_to}, t19.piap.pl:7.1.1;127.0.0.199:7.1.2;piap.pl:7.1.1;d41d8cd98f00b204e9800998ecf8427e.com:7.1.1 X-MS-Exchange-Organization-SCL: -1 X-KLMS-AntiSpam-Interceptor-Info: scan successful X-KLMS-AntiPhishing: Clean, bases: 2021/07/23 10:01:00 X-KLMS-AntiVirus: Kaspersky Security for Linux Mail Server, version 8.0.3.30, bases: 2021/07/23 07:07:00 #16947255 X-KLMS-AntiVirus-Status: Clean, skipped Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Hans, Hans Verkuil writes: > The tda1997x doesn't have any method of obtaining the sync polarities? > > HSync and VSync are, as you say, using in-band signaling, but the 'polari= ty' > still matters when it comes to detecting timings. All HDMI receivers I ha= ve > ever seen have a register that reports the polarities. I find it *very* h= ard > to imagine that this device doesn't support that. I didn't know that HDMI serializers send the logical levels of those lines, I thought some frame/field/line start/end codes are sent instead. I will have to have a closer look at this chip, then. > Do you have a datasheet for this device? No, there is only the current driver and also the old one (in Gateworks' Freescale/NXP kernel). Tim may have something perhaps under NDA, maaybe. I will see if I can find these bits in the registers. Thanks. --=20 Krzysztof "Chris" Ha=C5=82asa Sie=C4=87 Badawcza =C5=81ukasiewicz Przemys=C5=82owy Instytut Automatyki i Pomiar=C3=B3w PIAP Al. Jerozolimskie 202, 02-486 Warszawa