arm64: dts: imx8mm-kontron: Add support for display bridges on BL i.MX8MM

The Kontron Electronics BL i.MX8MM has oboard disply bridges for
DSI->HDMI and DSI->LVDS conversion. The DSI interface is muxed by
a GPIO-controlled switch to one of these two bridges.

By default the HDMI bridge is enabled. The LVDS bridge can be
selected by loading an additional (panel-specific) overlay.

Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

diff --git a/arch/arm64/boot/dts/freescale/imx8mm-kontron-bl.dts b/arch/arm64/boot/dts/freescale/imx8mm-kontron-bl.dts
index aab8e24216501e154ea521abf83a2b2fbd8d9219..a8ef4fba16a9e185776da2fcc961bca45f3f9e53 100644 (file)
--- a/arch/arm64/boot/dts/freescale/imx8mm-kontron-bl.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mm-kontron-bl.dts
@@ -25,6 +25,17 @@
                clock-output-names = "osc-can";
        };
 
+       hdmi-out {
+               compatible = "hdmi-connector";
+               type = "a";
+
+               port {
+                       hdmi_in_conn: endpoint {
+                               remote-endpoint = <&bridge_out_conn>;
+                       };
+               };
+       };
+
        leds {
                compatible = "gpio-leds";
                pinctrl-names = "default";
@@ -132,6 +143,86 @@
        };
 };
 
+&gpio4 {
+       pinctrl-names = "default";
+       pinctrl-0 = <&pinctrl_gpio4>;
+
+       dsi_mux_sel_hdmi: dsi-mux-sel-hdmi-hog {
+               gpio-hog;
+               gpios = <14 GPIO_ACTIVE_HIGH>;
+               output-high;
+               line-name = "dsi-mux-sel";
+       };
+
+       dsi_mux_sel_lvds: dsi-mux-sel-lvds-hog {
+               gpio-hog;
+               gpios = <14 GPIO_ACTIVE_HIGH>;
+               output-low;
+               line-name = "dsi-mux-sel";
+               status = "disabled";
+       };
+
+       dsi-mux-oe-hog {
+               gpio-hog;
+               gpios = <15 GPIO_ACTIVE_LOW>;
+               output-high;
+               line-name = "dsi-mux-oe";
+       };
+};
+
+&i2c3 {
+       clock-frequency = <400000>;
+       pinctrl-names = "default";
+       pinctrl-0 = <&pinctrl_i2c3>;
+       status = "okay";
+
+       lvds: bridge@2c {
+               compatible = "ti,sn65dsi84";
+               reg = <0x2c>;
+               enable-gpios = <&gpio4 26 GPIO_ACTIVE_HIGH>;
+               pinctrl-names = "default";
+               pinctrl-0 = <&pinctrl_sn65dsi84>;
+               status = "disabled";
+       };
+
+       hdmi: hdmi@39 {
+               compatible = "adi,adv7535";
+               reg = <0x39>;
+               pinctrl-names = "default";
+               pinctrl-0 = <&pinctrl_adv7535>;
+               adi,dsi-lanes = <4>;
+               interrupt-parent = <&gpio4>;
+               interrupts = <16 IRQ_TYPE_LEVEL_LOW>;
+               a2vdd-supply = <&reg_vdd_1v8>;
+               avdd-supply = <&reg_vdd_1v8>;
+               dvdd-supply = <&reg_vdd_1v8>;
+               pvdd-supply = <&reg_vdd_1v8>;
+               v1p2-supply = <&reg_vdd_1v8>;
+               v3p3-supply = <&reg_vdd_3v3>;
+
+               ports {
+                       #address-cells = <1>;
+                       #size-cells = <0>;
+
+                       port@0 {
+                               reg = <0>;
+
+                               bridge_in_dsi_hdmi: endpoint {
+                                       remote-endpoint = <&mipi_dsi_out>;
+                               };
+                       };
+
+                       port@1 {
+                               reg = <1>;
+
+                               bridge_out_conn: endpoint {
+                                       remote-endpoint = <&hdmi_in_conn>;
+                               };
+                       };
+               };
+       };
+};
+
 &i2c4 {
        clock-frequency = <100000>;
        pinctrl-names = "default";
@@ -144,6 +235,19 @@
        };
 };
 
+&lcdif {
+       status = "okay";
+};
+
+&mipi_dsi {
+       samsung,esc-clock-frequency = <54000000>;
+       status = "okay";
+};
+
+&mipi_dsi_out {
+       remote-endpoint = <&bridge_in_dsi_hdmi>;
+};
+
 &pwm2 {
        pinctrl-names = "default";
        pinctrl-0 = <&pinctrl_pwm2>;
@@ -207,6 +311,12 @@
        pinctrl-names = "default";
        pinctrl-0 = <&pinctrl_gpio>;
 
+       pinctrl_adv7535: adv7535grp {
+               fsl,pins = <
+                       MX8MM_IOMUXC_SAI1_TXD4_GPIO4_IO16               0x19
+               >;
+       };
+
        pinctrl_can: cangrp {
                fsl,pins = <
                        MX8MM_IOMUXC_SAI3_RXFS_GPIO4_IO28               0x19
@@ -277,6 +387,20 @@
                >;
        };
 
+       pinctrl_gpio4: gpio4grp {
+               fsl,pins = <
+                       MX8MM_IOMUXC_SAI1_TXD2_GPIO4_IO14               0x19
+                       MX8MM_IOMUXC_SAI1_TXD3_GPIO4_IO15               0x19
+               >;
+       };
+
+       pinctrl_i2c3: i2c3grp {
+               fsl,pins = <
+                       MX8MM_IOMUXC_I2C3_SCL_I2C3_SCL                  0x40000083
+                       MX8MM_IOMUXC_I2C3_SDA_I2C3_SDA                  0x40000083
+               >;
+       };
+
        pinctrl_i2c4: i2c4grp {
                fsl,pins = <
                        MX8MM_IOMUXC_I2C4_SCL_I2C4_SCL                  0x40000083
@@ -290,6 +414,13 @@
                >;
        };
 
+       pinctrl_sn65dsi84: sn65dsi84grp {
+               fsl,pins = <
+                       MX8MM_IOMUXC_SAI2_TXD0_GPIO4_IO26               0x19
+                       MX8MM_IOMUXC_SD2_WP_GPIO2_IO20                  0x19
+               >;
+       };
+
        pinctrl_uart1: uart1grp {
                fsl,pins = <
                        MX8MM_IOMUXC_SAI2_RXC_UART1_DCE_RX              0x0