From: Svyatoslav Ryhel <clamor95@gmail.com>
Date: Mon, 11 May 2026 07:48:55 +0000 (+0300)
Subject: ARM: tegra: transformer: Add support for front camera
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=34d89435081d07b052dd522a57054132dada5400;p=thirdparty%2Fkernel%2Flinux.git

ARM: tegra: transformer: Add support for front camera

Add front camera video path. Aptina MI1040 camera is used on all supported
ASUS Transformers, but only TF201 and TF700T will work since on
TF300T/TG/TL front camera is linked through an additional ISP.

Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
---

diff --git a/arch/arm/boot/dts/nvidia/tegra30-asus-transformer-common.dtsi b/arch/arm/boot/dts/nvidia/tegra30-asus-transformer-common.dtsi
index ead95306840f7..e6d079647f772 100644
--- a/arch/arm/boot/dts/nvidia/tegra30-asus-transformer-common.dtsi
+++ b/arch/arm/boot/dts/nvidia/tegra30-asus-transformer-common.dtsi
@@ -2,6 +2,7 @@
 
 #include <dt-bindings/input/gpio-keys.h>
 #include <dt-bindings/input/input.h>
+#include <dt-bindings/media/video-interfaces.h>
 #include <dt-bindings/thermal/thermal.h>
 
 #include "tegra30.dtsi"
@@ -73,6 +74,91 @@
 	};
 
 	host1x@50000000 {
+		vi@54080000 {
+			status = "okay";
+
+			csi@800 {
+				status = "okay";
+
+				avdd-dsi-csi-supply = <&avdd_dsi_csi>;
+
+				/* CSI-A */
+				channel@0 {
+					reg = <0>;
+
+					nvidia,mipi-calibrate = <&csi 0>; /* CSIA pad */
+
+					#address-cells = <1>;
+					#size-cells = <0>;
+
+					port@0 {
+						reg = <0>;
+
+						csia_input: endpoint {
+							data-lanes = <1 2>;
+							/* Add rear camera */
+						};
+					};
+
+					port@1 {
+						reg = <1>;
+
+						csia_output: endpoint {
+							remote-endpoint = <&vi_ppa_input>;
+						};
+					};
+				};
+
+				/* CSI-B */
+				channel@1 {
+					reg = <1>;
+
+					nvidia,mipi-calibrate = <&csi 1>; /* CSIB pad */
+
+					#address-cells = <1>;
+					#size-cells = <0>;
+
+					port@0 {
+						reg = <0>;
+
+						csib_input: endpoint {
+							data-lanes = <3>;
+							remote-endpoint = <&front_camera_output>;
+						};
+					};
+
+					port@1 {
+						reg = <1>;
+
+						csib_output: endpoint {
+							remote-endpoint = <&vi_ppb_input>;
+						};
+					};
+				};
+			};
+
+			ports {
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				port@0 {
+					reg = <0>;
+
+					vi_ppa_input: endpoint {
+						remote-endpoint = <&csia_output>;
+					};
+				};
+
+				port@1 {
+					reg = <1>;
+
+					vi_ppb_input: endpoint {
+						remote-endpoint = <&csib_output>;
+					};
+				};
+			};
+		};
+
 		hdmi: hdmi@54280000 {
 			status = "okay";
 
@@ -1160,6 +1246,36 @@
 			vdd-supply = <&vdd_3v3_sys>;
 		};
 
+		/* Aptina 1/6" HD SOC (MI1040) */
+		front-camera@48 {
+			compatible = "aptina,mi1040";
+			reg = <0x48>;
+
+			clocks = <&tegra_car TEGRA30_CLK_CSUS>;
+
+			reset-gpios = <&gpio TEGRA_GPIO(O, 0) GPIO_ACTIVE_LOW>;
+
+			vddio-supply = <&vdd_1v8_cam>;
+			vdd-supply = <&vdd_1v8_cam>;
+			vaa-supply = <&avdd_2v85_fcam>;
+
+			orientation = <0>; /* Front camera */
+
+			assigned-clocks = <&tegra_car TEGRA30_CLK_VI_SENSOR>,
+					  <&tegra_car TEGRA30_CLK_CSUS>;
+			assigned-clock-rates = <24000000>;
+			assigned-clock-parents = <&tegra_car TEGRA30_CLK_PLL_P>,
+						 <&tegra_car TEGRA30_CLK_VI_SENSOR>;
+
+			port {
+				front_camera_output: endpoint {
+					bus-type = <MEDIA_BUS_TYPE_CSI2_DPHY>;
+					link-frequencies = /bits/ 64 <384000000>;
+					remote-endpoint = <&csib_input>;
+				};
+			};
+		};
+
 		gyroscope@68 {
 			compatible = "invensense,mpu3050";
 			reg = <0x68>;
@@ -1297,7 +1413,7 @@
 
 				/* LDO5 is not used by Transformers */
 
-				ldo6 {
+				avdd_dsi_csi: ldo6 {
 					regulator-name = "avdd_dsi_csi,pwrdet_mipi";
 					regulator-min-microvolt = <1200000>;
 					regulator-max-microvolt = <1200000>;
@@ -1672,6 +1788,26 @@
 		vin-supply = <&vdd_5v0_sys>;
 	};
 
+	vdd_1v8_cam: regulator-viocam {
+		compatible = "regulator-fixed";
+		regulator-name = "vdd_1v8_cam";
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <1800000>;
+		gpio = <&gpio TEGRA_GPIO(BB, 4) GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+		vin-supply = <&vdd_1v8_vio>;
+	};
+
+	avdd_2v85_fcam: regulator-avcam-front {
+		compatible = "regulator-fixed";
+		regulator-name = "vdd_2v85_fcam";
+		regulator-min-microvolt = <2850000>;
+		regulator-max-microvolt = <2850000>;
+		gpio = <&gpio TEGRA_GPIO(S, 0) GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+		vin-supply = <&vdd_3v3_sys>;
+	};
+
 	sound {
 		nvidia,i2s-controller = <&tegra_i2s1>;