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This causes both issues with fetching of EDID and with updating of the bridge's firmware. While we are debugging the issue, switch corresponding I2C bus to use i2c-gpio driver. While using i2c-gpio no communication issues are observed. This patch is asusmed to be a temporary fix, so it is implemented in a non-intrusive manner to simply reverting it later. Fixes: 616eda24edd4 ("arm64: dts: qcom: qrb2210-rb1: Set up HDMI") Cc: stable@vger.kernel.org Signed-off-by: Dmitry Baryshkov --- arch/arm64/boot/dts/qcom/qrb2210-rb1.dts | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/arch/arm64/boot/dts/qcom/qrb2210-rb1.dts b/arch/arm64/boot/dts/qcom/qrb2210-rb1.dts index bb5191422660..7ab55337cdfd 100644 --- a/arch/arm64/boot/dts/qcom/qrb2210-rb1.dts +++ b/arch/arm64/boot/dts/qcom/qrb2210-rb1.dts @@ -59,6 +59,17 @@ hdmi_con: endpoint { }; }; + i2c2_gpio: i2c2-gpio { + compatible = "i2c-gpio"; + + sda-gpios = <&tlmm 6 GPIO_ACTIVE_HIGH>; + scl-gpios = <&tlmm 7 GPIO_ACTIVE_HIGH>; + #address-cells = <1>; + #size-cells = <0>; + + status = "disabled"; + }; + leds { compatible = "gpio-leds"; @@ -199,7 +210,7 @@ &gpi_dma0 { status = "okay"; }; -&i2c2 { +&i2c2_gpio { clock-frequency = <400000>; status = "okay"; From patchwork Tue Jun 4 10:14:59 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Baryshkov X-Patchwork-Id: 13685011 Received: from mail-lj1-f169.google.com (mail-lj1-f169.google.com [209.85.208.169]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8BD1E144D1C for ; 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Tue, 04 Jun 2024 03:15:01 -0700 (PDT) Received: from umbar.lan ([192.130.178.91]) by smtp.gmail.com with ESMTPSA id 38308e7fff4ca-2ea91cf0bcdsm14715451fa.120.2024.06.04.03.15.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 04 Jun 2024 03:15:01 -0700 (PDT) From: Dmitry Baryshkov Date: Tue, 04 Jun 2024 13:14:59 +0300 Subject: [PATCH 2/2] arm64: dts: qcom: qrb4210-rb2: switch I2C2 to i2c-gpio Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240604-rb12-i2c2g-pio-v1-2-f323907179d9@linaro.org> References: <20240604-rb12-i2c2g-pio-v1-0-f323907179d9@linaro.org> In-Reply-To: <20240604-rb12-i2c2g-pio-v1-0-f323907179d9@linaro.org> To: Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: Caleb Connolly , Alexey Klimov , linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Dmitry Baryshkov , stable@vger.kernel.org X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; 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This causes both issues with fetching of EDID and with updating of the bridge's firmware. While we are debugging the issue, switch corresponding I2C bus to use i2c-gpio driver. While using i2c-gpio no communication issues are observed. This patch is asusmed to be a temporary fix, so it is implemented in a non-intrusive manner to simply reverting it later. Fixes: f7b01e07e89c ("arm64: dts: qcom: qrb4210-rb2: Enable display out") Cc: stable@vger.kernel.org Signed-off-by: Dmitry Baryshkov --- arch/arm64/boot/dts/qcom/qrb4210-rb2.dts | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/arch/arm64/boot/dts/qcom/qrb4210-rb2.dts b/arch/arm64/boot/dts/qcom/qrb4210-rb2.dts index 2c39bb1b97db..5bfbd81db032 100644 --- a/arch/arm64/boot/dts/qcom/qrb4210-rb2.dts +++ b/arch/arm64/boot/dts/qcom/qrb4210-rb2.dts @@ -60,6 +60,17 @@ hdmi_con: endpoint { }; }; + i2c2_gpio: i2c2-gpio { + compatible = "i2c-gpio"; + + sda-gpios = <&tlmm 6 GPIO_ACTIVE_HIGH>; + scl-gpios = <&tlmm 7 GPIO_ACTIVE_HIGH>; + #address-cells = <1>; + #size-cells = <0>; + + status = "disabled"; + }; + leds { compatible = "gpio-leds"; @@ -190,7 +201,7 @@ zap-shader { }; }; -&i2c2 { +&i2c2_gpio { clock-frequency = <400000>; status = "okay";