From nobody Thu Sep 11 21:24:42 2025 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4FA23C00528 for ; Mon, 7 Aug 2023 15:33:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230342AbjHGPdt (ORCPT ); Mon, 7 Aug 2023 11:33:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54980 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230326AbjHGPdq (ORCPT ); Mon, 7 Aug 2023 11:33:46 -0400 Received: from fllv0016.ext.ti.com (fllv0016.ext.ti.com [198.47.19.142]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 42643C4; Mon, 7 Aug 2023 08:33:31 -0700 (PDT) Received: from fllv0035.itg.ti.com ([10.64.41.0]) by fllv0016.ext.ti.com (8.15.2/8.15.2) with ESMTP id 377FXAeC051004; Mon, 7 Aug 2023 10:33:10 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1691422390; bh=pOpkWv1WY4LUxgbOsW3PA6qxRpIS7KNs/e9MLKHvQHY=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=Pdwu+abF6288Q/mCiUzs9Sp8x/jhnQuDVZ+nI7JuTI7fIn63LXyovRCGkwlx1BH7G IxpH/+PcFRERWcCeUGWMrGdxd6r9MHj5+e/4JpcvDbU/MdTGyVOE5Jg5g5PJGg4EHM z5qxLjYGdubeHJJZoywWDU6iN7Fl6tj9HMatyoWU= Received: from DFLE111.ent.ti.com (dfle111.ent.ti.com [10.64.6.32]) by fllv0035.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 377FXArL119824 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Mon, 7 Aug 2023 10:33:10 -0500 Received: from DFLE101.ent.ti.com (10.64.6.22) by DFLE111.ent.ti.com (10.64.6.32) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.23; Mon, 7 Aug 2023 10:33:10 -0500 Received: from lelv0326.itg.ti.com (10.180.67.84) by DFLE101.ent.ti.com (10.64.6.22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.23 via Frontend Transport; Mon, 7 Aug 2023 10:33:10 -0500 Received: from localhost (ileaxei01-snat2.itg.ti.com [10.180.69.6]) by lelv0326.itg.ti.com (8.15.2/8.15.2) with ESMTP id 377FX9Z6025435; Mon, 7 Aug 2023 10:33:10 -0500 From: Aradhya Bhatia To: Nishanth Menon , Vignesh Raghavendra , Tero Kristo , Rob Herring , Krzysztof Kozlowski , Catalin Marinas , Conor Dooley , Will Deacon , Francesco Dolcini CC: Devicetree List , Linux Kernel List , Linux ARM Kernel List , Tomi Valkeinen , Rahul T R , Devarsh Thakkar , Jai Luthra , Jayesh Choudhary , Aradhya Bhatia Subject: [PATCH v4 1/6] arm64: dts: ti: k3-am62x-sk-common: Update main-i2c1 frequency Date: Mon, 7 Aug 2023 21:03:02 +0530 Message-ID: <20230807153307.22174-2-a-bhatia1@ti.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230807153307.22174-1-a-bhatia1@ti.com> References: <20230807153307.22174-1-a-bhatia1@ti.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" The Display Data Channel (DDC) transactions between an HDMI transmitter (SIL9022A in this case) and an HDMI monitor, occur at a maximum of 100KHz. That's the maximum supported frequency within DDC standards. While the SIL9022A can transact with the core at 400KHz, it needs to drop the frequency to 100KHz when communicating with the monitor, otherwise, the i2c controller times out and shows warning like this. [ 985.773431] omap_i2c 20010000.i2c: controller timed out That feature, however, has not been enabled in the SIL9022 driver. Since, dropping the frequency doesn't affect any other devices on the bus, drop the main-i2c1 frequency from 400KHz to 100KHz. Fixes: a841581451af ("arm64: dts: ti: Refractor AM625 SK dts") Signed-off-by: Aradhya Bhatia --- arch/arm64/boot/dts/ti/k3-am62x-sk-common.dtsi | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/boot/dts/ti/k3-am62x-sk-common.dtsi b/arch/arm64/bo= ot/dts/ti/k3-am62x-sk-common.dtsi index 34c8ffc553ec..540ed8a0d7fb 100644 --- a/arch/arm64/boot/dts/ti/k3-am62x-sk-common.dtsi +++ b/arch/arm64/boot/dts/ti/k3-am62x-sk-common.dtsi @@ -300,7 +300,7 @@ &main_i2c1 { status =3D "okay"; pinctrl-names =3D "default"; pinctrl-0 =3D <&main_i2c1_pins_default>; - clock-frequency =3D <400000>; + clock-frequency =3D <100000>; =20 tlv320aic3106: audio-codec@1b { #sound-dai-cells =3D <0>; --=20 2.40.1