From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 85F2311710 for ; Mon, 11 Sep 2023 14:07:34 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 05917C433C8; Mon, 11 Sep 2023 14:07:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1694441254; bh=Vjat6pwbQ3VmY8kOMSe/J9x7nyo3HUkYfulJpjjKjpY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=b59R8O+KK0DwyF4zsWAad6jYf5zVwFIidt9JpzqVGkxOJ1Var5XQNZcScOlmJYS9A KsFo+XJvgB5xWhK2lyPmZ9INpEOhrgM0SmBIpT4jR9DdXF6pcNstOVBLUCH7hOkt2V wkWEYp9KSCuGzw/RPimWqVvVV3J+RcGRYjqxLG5Q= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Aradhya Bhatia , Nishanth Menon , Sasha Levin Subject: [PATCH 6.5 341/739] arm64: dts: ti: k3-am62x-sk-common: Update main-i2c1 frequency Date: Mon, 11 Sep 2023 15:42:20 +0200 Message-ID: <20230911134700.631529859@linuxfoundation.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20230911134650.921299741@linuxfoundation.org> References: <20230911134650.921299741@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.5-stable review patch. If anyone has any objections, please let me know. ------------------ From: Aradhya Bhatia [ Upstream commit 73387da70f9c26b6fba4f62371d013cce14663d9 ] 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 Link: https://lore.kernel.org/r/20230809084559.17322-2-a-bhatia1@ti.com Signed-off-by: Nishanth Menon Signed-off-by: Sasha Levin --- 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/boot/dts/ti/k3-am62x-sk-common.dtsi index 34c8ffc553ec3..540ed8a0d7fb6 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 = "okay"; pinctrl-names = "default"; pinctrl-0 = <&main_i2c1_pins_default>; - clock-frequency = <400000>; + clock-frequency = <100000>; tlv320aic3106: audio-codec@1b { #sound-dai-cells = <0>; -- 2.40.1