linux-kernel - [PATCH v3] arm64: dts: qcom: sc8280xp-x13s: Enable RGB sensor

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Message-Id: <20240806-b4-linux-next-24-07-31-camss-sc8280xp-lenovo-rgb-v2-v3-1-199767fb193d@linaro.org>
Date: Tue, 06 Aug 2024 10:45:43 +0100
From: Bryan O'Donoghue <bryan.odonoghue@...aro.org>
To: Bjorn Andersson <andersson@...nel.org>, 
 Konrad Dybcio <konrad.dybcio@...aro.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>
Cc: linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, 
 Vladimir Zapolskiy <vladimir.zapolskiy@...aro.org>, 
 Bryan O'Donoghue <bryan.odonoghue@...aro.org>
Subject: [PATCH v3] arm64: dts: qcom: sc8280xp-x13s: Enable RGB sensor

Enable the main RGB sensor on the Lenovo x13s a five megapixel 2 lane DPHY
MIPI sensor connected to cisphy0.

With the pm8008 patches recently applied to the x13s dtsi we can now also
enable the RGB sensor. Once done we have all upstream support necessary for
the RGB sensor on x13s.

Reviewed-by: Vladimir Zapolskiy <vladimir.zapolskiy@...aro.org>
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@...aro.org>
---
The Lenovo x13s has a five megapixel ov5675 sensor as well as a one
megpixel ov9734 B+W NOIR sensor for low-light face detection login.

This patch enables the RGB sensor.

A gpio exists in the upstream dts to indicate camera activity which
currently we don't tie to CAMSS activity yet.

Running

- A Linux distro which ships libcamera > 0.3.0
- Firefox nightly
- Setting Firefox about:config:media.webrtc.capture.allow-pipewire = true

It should then be possible to use the on-board MIPI camera for Zoom,
Hangouts etc.

Changes in v2:
- Drops useless assigned-clocks entry 
- Link to v1: https://lore.kernel.org/r/20240801-b4-linux-next-24-07-31-camss-sc8280xp-lenovo-rgb-v2-v1-1-30622c6a0c48@linaro.org

Changes in v3:
- Incorporate Vlad's review
- Add Vlad's RB
- Link to v2: https://lore.kernel.org/r/20240802-b4-linux-next-24-07-31-camss-sc8280xp-lenovo-rgb-v2-v2-1-a80a301dba16@linaro.org
---
 .../dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts     | 67 ++++++++++++++++++++++
 1 file changed, 67 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts b/arch/arm64/boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts
index a7c5a3f5926c7..6a28cab971891 100644
--- a/arch/arm64/boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts
+++ b/arch/arm64/boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts
@@ -592,6 +592,57 @@ vreg_l10d: ldo10 {
 	};
 };
 
+&camss {
+	vdda-phy-supply = <&vreg_l6d>;
+	vdda-pll-supply = <&vreg_l4d>;
+
+	status = "okay";
+
+	ports {
+		port@0 {
+			csiphy0_lanes01_ep: endpoint@0 {
+				reg = <0>;
+				clock-lanes = <7>;
+				data-lanes = <0 1>;
+				remote-endpoint = <&ov5675_ep>;
+			};
+		};
+	};
+};
+
+&cci2 {
+	status = "okay";
+};
+
+&cci2_i2c1 {
+	camera@10 {
+		compatible = "ovti,ov5675";
+		reg = <0x10>;
+
+		reset-gpios = <&tlmm 15 GPIO_ACTIVE_LOW>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&cam_rgb_default>;
+
+		clocks = <&camcc CAMCC_MCLK3_CLK>;
+
+		orientation = <0>;	/* Front facing */
+
+		avdd-supply = <&vreg_l6q>;
+		dvdd-supply = <&vreg_l2q>;
+		dovdd-supply = <&vreg_l7q>;
+
+		port {
+			ov5675_ep: endpoint {
+				clock-lanes = <0>;
+				data-lanes = <1 2>;
+				link-frequencies = /bits/ 64 <450000000>;
+				remote-endpoint = <&csiphy0_lanes01_ep>;
+			};
+		};
+
+	};
+};
+
 &dispcc0 {
 	status = "okay";
 };
@@ -1436,6 +1487,22 @@ cam_indicator_en: cam-indicator-en-state {
 		bias-disable;
 	};
 
+	cam_rgb_default: cam-rgb-default-state {
+		mclk-pins {
+			pins = "gpio17";
+			function = "cam_mclk";
+			drive-strength = <16>;
+			bias-disable;
+		};
+
+		sc-rgb-xshut-n-pins {
+			pins = "gpio15";
+			function = "gpio";
+			drive-strength = <2>;
+			bias-disable;
+		};
+	};
+
 	edp_reg_en: edp-reg-en-state {
 		pins = "gpio25";
 		function = "gpio";

---
base-commit: cd19ac2f903276b820f5d0d89de0c896c27036ed
change-id: 20240731-b4-linux-next-24-07-31-camss-sc8280xp-lenovo-rgb-v2-525b250dfb84

Best regards,
-- 
Bryan O'Donoghue <bryan.odonoghue@...aro.org>