From nobody Thu Sep 11 21:22:25 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 101B6C04FE0 for ; Wed, 9 Aug 2023 08:46:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231979AbjHIIqb (ORCPT ); Wed, 9 Aug 2023 04:46:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60320 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231126AbjHIIqZ (ORCPT ); Wed, 9 Aug 2023 04:46:25 -0400 Received: from lelv0143.ext.ti.com (lelv0143.ext.ti.com [198.47.23.248]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C1AB01BD9; Wed, 9 Aug 2023 01:46:23 -0700 (PDT) Received: from lelv0266.itg.ti.com ([10.180.67.225]) by lelv0143.ext.ti.com (8.15.2/8.15.2) with ESMTP id 3798k2xU127458; Wed, 9 Aug 2023 03:46:02 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1691570762; bh=pOpkWv1WY4LUxgbOsW3PA6qxRpIS7KNs/e9MLKHvQHY=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=p5myMuz+dJxsChosWagRW7OFUH3cZgFXT2R9y7rSFh3mS08EU433vrgG6JXeMO0hb FJZMAXBYS19+odqE452Zqibj/y6lmPAn5cy3Z3ROKcMGLc1XOydGx1o8YJdwIFGreb t58wTTYE+LvthhGAj18BGjqQWA/r0DDEE3ocCy8U= Received: from DLEE101.ent.ti.com (dlee101.ent.ti.com [157.170.170.31]) by lelv0266.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 3798k2iJ023626 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 9 Aug 2023 03:46:02 -0500 Received: from DLEE106.ent.ti.com (157.170.170.36) by DLEE101.ent.ti.com (157.170.170.31) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.23; Wed, 9 Aug 2023 03:46:02 -0500 Received: from fllv0039.itg.ti.com (10.64.41.19) by DLEE106.ent.ti.com (157.170.170.36) 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; Wed, 9 Aug 2023 03:46:02 -0500 Received: from localhost (ileaxei01-snat.itg.ti.com [10.180.69.5]) by fllv0039.itg.ti.com (8.15.2/8.15.2) with ESMTP id 3798k1Ms120239; Wed, 9 Aug 2023 03:46:01 -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 v5 1/6] arm64: dts: ti: k3-am62x-sk-common: Update main-i2c1 frequency Date: Wed, 9 Aug 2023 14:15:54 +0530 Message-ID: <20230809084559.17322-2-a-bhatia1@ti.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230809084559.17322-1-a-bhatia1@ti.com> References: <20230809084559.17322-1-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