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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 160F7C25B77 for ; Thu, 16 May 2024 12:07:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=4eTJPWNXtObsCZvkp6ijRT3cE7JkQluRfOGG4BXsinQ=; b=2jMFRkXXgTTONw C8MdN1T/unA3673NBqqHR2Ml8gQdeG67sVhW7OXwjILmf6wtJlmm33FARHRramiZHMZ8pZNnDmM5g DhlxAet835u0l/rCdWFWSTGMdpiCQm1Qjekldv5YKM3kNbjr6DcK3AHYB6Dwlc1hOq9uXCQKynAWp qsnAAkYlYySQdSvLRmAOgTU4bnvye9CUkRcLLECHkWx8PZFsU0fCLENOrrBgYTI7D1Wq5U7eIIqvv FVdzy1hkjWyb2xyMCXFwgjMk3+TOPddsvAaEvkaHnoy4j72liw+yC9pdA0YYPCUhx5DVchFrWq7Jf D1tkUjgG7cdGWQ/HJHBA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1s7Ztc-00000004iO9-0F7B; Thu, 16 May 2024 12:07:40 +0000 Received: from mx1.tq-group.com ([93.104.207.81]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1s7ZtY-00000004iMj-2oJx for linux-arm-kernel@lists.infradead.org; Thu, 16 May 2024 12:07:38 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=tq-group.com; i=@tq-group.com; q=dns/txt; s=key1; t=1715861256; x=1747397256; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=vcdsIGqZ5qz1syFN4U6rshX8LYDZBqv5t9KYXC8SXXE=; b=jd2zs77JzOHloogy1V1ye5XS1tcth9ydy8HDZj1SgRtYRhdWNq7GONhD 86s1QC6lJjWVOTi4+p9CXCHXO1qbTNpMd4Oi54mPUEEjosJFqq9EYcDaC M2y3vW59fC/ZZLY3GXxrRRiJ+Byl4V8GdsMveGoYlRNqcUdxmDDjKLVDF 8sWte5wUdDqDihL3ZYC1mnC7CFEfQ2QZw9Ocq60tQKlwU3qVjRbayF9cT /tAZsJQmtKThZnoYmr5WJMVWib7QyhA+u6S/aSErzGk9QZxvTfr81xz7F RlB/aB8Fh3KucLtYa/aeSOWfjAxEghkYN0FIWuiz9n0dC2HhlP4kW8TMJ g==; X-CSE-ConnectionGUID: RksVlVebSziJVsdXvJdhKg== X-CSE-MsgGUID: tlJ8O3lfQa60hJSqAFcjvg== X-IronPort-AV: E=Sophos;i="6.08,164,1712613600"; d="scan'208";a="36937146" Received: from vmailcow01.tq-net.de ([10.150.86.48]) by mx1.tq-group.com with ESMTP; 16 May 2024 14:07:34 +0200 Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id 23DB6174204; Thu, 16 May 2024 14:07:29 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ew.tq-group.com; s=dkim; t=1715861250; h=from:subject:date:message-id:to:cc:mime-version:content-type: content-transfer-encoding:in-reply-to:references; bh=vcdsIGqZ5qz1syFN4U6rshX8LYDZBqv5t9KYXC8SXXE=; b=NwdinzhA0JeGGqgMmGZt/8JCtKF1X2eXOUGriZ8xtAglud6v3UTZWqQ8nz3R/y1Cw84O0/ U4AYI1vUo8hItVABU9FgsRWutlaKB1BUaGlmIa8/tNLu1QkzFNsg/zrg/Q8vn7H8rzM1Ux 1czmd7PK1P2/3MC4JvPrYFlmQQkmPknYAlF2fYkaaR41LZd7yHXpNBJ7Eb5Iybqo90jzKv 2K17rWErAszcPe/4kSGnP4KvdiZjQ+b9A7eq7qF/NTwAJPdIslPYmPxO3xgXloZc9MSB7j Ms7+cYsk+KncudPPRocDPTasNeoBkmM+AavZOKM8V2OfnqXP6he/PKkW80BAAg== From: Alexander Stein To: Marek Vasut , Francesco Dolcini , linux-arm-kernel@lists.infradead.org Cc: Rob Herring , Conor Dooley , devicetree@vger.kernel.org, Shawn Guo , Sascha Hauer , linux-kernel@vger.kernel.org, imx@lists.linux.dev, kernel@dh-electronics.com, Pengutronix Kernel Team , Krzysztof Kozlowski , Fabio Estevam , linux-arm-kernel@lists.infradead.org, Ahmad Fatoum Subject: Re: [PATCH] arm64: dts: imx8mp: Enable HDMI on i.MX8MP DHCOM PDK2 and PDK3 Date: Thu, 16 May 2024 14:07:34 +0200 Message-ID: <5724851.tdWV9SEqCh@steina-w> Organization: TQ-Systems GmbH In-Reply-To: <69c3517c-0fa4-4e0d-9515-21adfb6730a8@pengutronix.de> References: <20240514010706.245874-1-marex@denx.de> <69c3517c-0fa4-4e0d-9515-21adfb6730a8@pengutronix.de> MIME-Version: 1.0 X-Last-TLS-Session-Version: TLSv1.3 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240516_050737_189945_BFAC4D1D X-CRM114-Status: GOOD ( 20.16 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi everyone, Am Donnerstag, 16. Mai 2024, 13:46:33 CEST schrieb Ahmad Fatoum: > On 16.05.24 13:44, Marek Vasut wrote: > > On 5/16/24 1:36 PM, Ahmad Fatoum wrote: > >> Hello Marek, > > = > > Hi, > > = > >> On 16.05.24 13:14, Marek Vasut wrote: > >>> On 5/16/24 10:00 AM, Francesco Dolcini wrote: > >>>> Hello Marek, > >>> > >>> Hi, > >>> > >>>> On Tue, May 14, 2024 at 03:06:42AM +0200, Marek Vasut wrote: > >>>>> Enable HDMI output on i.MX8MP DHCOM PDK2 and PDK3. The I2C5 on PDK2= and > >>>>> I2C mux port 1 on PDK3 respectively are used in regular I2C mode in= stead > >>>>> of HDMI DDC mode to permit connection of other I2C devices on those= buses. > >>>> > >>>> Are you able to read the HDMI EDID with such configuration? I have t= he > >>>> patch ready for verdin imx8mp, I just did not have time to figure out > >>>> this last details. > >>> > >>> Yes with ddc-i2c-bus in hdmi_tx{} node, no with ddc-i2c-bus in connec= tor node. Maybe that's what you're running into ? The DW HDMI core needs th= e ddc-i2c-bus property in hdmi_tx{} node if you use non-native I2C bus for = the DDC channel. > >> > >> What benefit does the hdmi-connector provide over just omitting it? > >> Just for documentation purposes? > > = > > I was under the impression describing the hardware in DT in full was th= e best practice (TM), hence it is in full here. > = > Sure, I am just wondering what effect, if any, it has in how Linux interp= rets > the device tree. I have an i.MX8MP board with HDMI as well, but without > connector (yet). AFAICT having a hdmi-connector has no effect at all. Linux drivers are not using it. Best regards, Alexander -- = TQ-Systems GmbH | M=FChlstra=DFe 2, Gut Delling | 82229 Seefeld, Germany Amtsgericht M=FCnchen, HRB 105018 Gesch=E4ftsf=FChrer: Detlef Schneider, R=FCdiger Stahl, Stefan Schneider http://www.tq-group.com/ _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel