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Message-ID: <20250915-imx8mp-pollux-display-overlays-v1-1-59508d578f0f@phytec.de>
Date: Mon, 15 Sep 2025 13:54:35 +0200
From: Yannic Moog <y.moog@...tec.de>
To: Shawn Guo <shawnguo@...nel.org>, Sascha Hauer <s.hauer@...gutronix.de>,
Pengutronix Kernel Team <kernel@...gutronix.de>, Fabio Estevam
<festevam@...il.com>, Rob Herring <robh@...nel.org>, Krzysztof Kozlowski
<krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>
CC: <imx@...ts.linux.dev>, <linux-arm-kernel@...ts.infradead.org>,
<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<upstream@...ts.phytec.de>, Yannic Moog <y.moog@...tec.de>
Subject: [PATCH 1/3] arm64: dts: imx8mp pollux: add display overlays
imx8mp-phyboard-pollux had a display baked into its board dts file.
However this approach does not truly discribe the hardware and is not
suitable when using different displays.
Move display specific description into an overlay and add the successor
display for the phyboard-pollux as an additional overlay.
Signed-off-by: Yannic Moog <y.moog@...tec.de>
---
arch/arm64/boot/dts/freescale/Makefile | 6 +++
.../imx8mp-phyboard-pollux-etml1010g3dra.dtso | 44 +++++++++++++++++++
.../imx8mp-phyboard-pollux-ph128800t006.dtso | 45 ++++++++++++++++++++
.../dts/freescale/imx8mp-phyboard-pollux-rdk.dts | 49 +++++-----------------
4 files changed, 105 insertions(+), 39 deletions(-)
diff --git a/arch/arm64/boot/dts/freescale/Makefile b/arch/arm64/boot/dts/freescale/Makefile
index 23535ed47631ca8f9db65bec5c07b6a7a7e36525..805ab9e5942bc9e2b9776e92412f56e969b6b39a 100644
--- a/arch/arm64/boot/dts/freescale/Makefile
+++ b/arch/arm64/boot/dts/freescale/Makefile
@@ -218,7 +218,13 @@ dtb-$(CONFIG_ARCH_MXC) += imx8mp-navqp.dtb
dtb-$(CONFIG_ARCH_MXC) += imx8mp-nitrogen-enc-carrier-board.dtb
dtb-$(CONFIG_ARCH_MXC) += imx8mp-nitrogen-smarc-universal-board.dtb
dtb-$(CONFIG_ARCH_MXC) += imx8mp-phyboard-pollux-rdk.dtb
+imx8mp-phyboard-pollux-etml1010g3dra-dtbs += imx8mp-phyboard-pollux-rdk.dtb \
+ imx8mp-phyboard-pollux-etml1010g3dra.dtbo
+imx8mp-phyboard-pollux-ph128800t006-dtbs += imx8mp-phyboard-pollux-rdk.dtb \
+ imx8mp-phyboard-pollux-ph128800t006.dtbo
imx8mp-phyboard-pollux-rdk-no-eth-dtbs += imx8mp-phyboard-pollux-rdk.dtb imx8mp-phycore-no-eth.dtbo
+dtb-$(CONFIG_ARCH_MXC) += imx8mp-phyboard-pollux-etml1010g3dra.dtb
+dtb-$(CONFIG_ARCH_MXC) += imx8mp-phyboard-pollux-ph128800t006.dtb
dtb-$(CONFIG_ARCH_MXC) += imx8mp-phyboard-pollux-rdk-no-eth.dtb
dtb-$(CONFIG_ARCH_MXC) += imx8mp-skov-basic.dtb
dtb-$(CONFIG_ARCH_MXC) += imx8mp-skov-revb-hdmi.dtb
diff --git a/arch/arm64/boot/dts/freescale/imx8mp-phyboard-pollux-etml1010g3dra.dtso b/arch/arm64/boot/dts/freescale/imx8mp-phyboard-pollux-etml1010g3dra.dtso
new file mode 100644
index 0000000000000000000000000000000000000000..713d65b0fb32a57bd566929a5f67098b3fe43963
--- /dev/null
+++ b/arch/arm64/boot/dts/freescale/imx8mp-phyboard-pollux-etml1010g3dra.dtso
@@ -0,0 +1,44 @@
+// SPDX-License-Identifier: (GPL-2.0-or-later OR MIT)
+/*
+ * Copyright (C) 2025 PHYTEC Messtechnik GmbH
+ */
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/clock/imx8mp-clock.h>
+
+/dts-v1/;
+/plugin/;
+
+&backlight_lvds1 {
+ brightness-levels = <0 8 16 32 64 128 255>;
+ default-brightness-level = <8>;
+ enable-gpios = <&gpio2 20 GPIO_ACTIVE_LOW>;
+ num-interpolated-steps = <2>;
+ pwms = <&pwm3 0 50000 0>;
+ status = "okay";
+};
+
+&lcdif2 {
+ status = "okay";
+};
+
+&lvds_bridge {
+ assigned-clocks = <&clk IMX8MP_CLK_MEDIA_LDB>, <&clk IMX8MP_VIDEO_PLL1>;
+ assigned-clock-parents = <&clk IMX8MP_VIDEO_PLL1_OUT>;
+ /*
+ * The LVDS panel uses 72.4 MHz pixel clock, set IMX8MP_VIDEO_PLL1 to
+ * 72.4 * 7 = 506.8 MHz so the LDB serializer and LCDIFv3 scanout
+ * engine can reach accurate pixel clock of exactly 72.4 MHz.
+ */
+ assigned-clock-rates = <0>, <506800000>;
+ status = "okay";
+};
+
+&panel_lvds1 {
+ compatible = "edt,etml1010g3dra";
+ status = "okay";
+};
+
+&pwm3 {
+ status = "okay";
+};
diff --git a/arch/arm64/boot/dts/freescale/imx8mp-phyboard-pollux-ph128800t006.dtso b/arch/arm64/boot/dts/freescale/imx8mp-phyboard-pollux-ph128800t006.dtso
new file mode 100644
index 0000000000000000000000000000000000000000..68975f0f3d84b5c29ee3e4e8815ce0d03ea19860
--- /dev/null
+++ b/arch/arm64/boot/dts/freescale/imx8mp-phyboard-pollux-ph128800t006.dtso
@@ -0,0 +1,45 @@
+// SPDX-License-Identifier: (GPL-2.0-or-later OR MIT)
+/*
+ * Copyright (C) 2025 PHYTEC Messtechnik GmbH
+ */
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/clock/imx8mp-clock.h>
+
+/dts-v1/;
+/plugin/;
+
+&backlight_lvds1 {
+ brightness-levels = <0 8 16 32 64 128 255>;
+ default-brightness-level = <8>;
+ enable-gpios = <&gpio2 20 GPIO_ACTIVE_LOW>;
+ num-interpolated-steps = <2>;
+ pwms = <&pwm3 0 66667 0>;
+ status = "okay";
+};
+
+&lcdif2 {
+ status = "okay";
+};
+
+&lvds_bridge {
+ assigned-clocks = <&clk IMX8MP_CLK_MEDIA_LDB>, <&clk IMX8MP_VIDEO_PLL1>;
+ assigned-clock-parents = <&clk IMX8MP_VIDEO_PLL1_OUT>;
+ /*
+ * The LVDS panel uses 72.4 MHz pixel clock, set IMX8MP_VIDEO_PLL1 to
+ * 66.5 * 7 = 465.5 MHz so the LDB serializer and LCDIFv3 scanout
+ * engine can reach accurate pixel clock of exactly 66.5 MHz.
+ */
+ assigned-clock-rates = <0>, <465500000>;
+ status = "okay";
+};
+
+
+&panel_lvds1 {
+ compatible = "powertip,ph128800t006-zhc01";
+ status = "okay";
+};
+
+&pwm3 {
+ status = "okay";
+};
diff --git a/arch/arm64/boot/dts/freescale/imx8mp-phyboard-pollux-rdk.dts b/arch/arm64/boot/dts/freescale/imx8mp-phyboard-pollux-rdk.dts
index 436152308642270c320e3ae3b21b9e46b923c043..e96b6faa6e0364231b1867b5d282264e4867e755 100644
--- a/arch/arm64/boot/dts/freescale/imx8mp-phyboard-pollux-rdk.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mp-phyboard-pollux-rdk.dts
@@ -8,7 +8,6 @@
#include <dt-bindings/phy/phy-imx8-pcie.h>
#include <dt-bindings/leds/leds-pca9532.h>
-#include <dt-bindings/pwm/pwm.h>
#include <dt-bindings/thermal/thermal.h>
#include "imx8mp-phycore-som.dtsi"
@@ -21,16 +20,12 @@ chosen {
stdout-path = &uart1;
};
- backlight_lvds: backlight {
+ backlight_lvds1: backlight1 {
compatible = "pwm-backlight";
- pinctrl-names = "default";
pinctrl-0 = <&pinctrl_lvds1>;
- brightness-levels = <0 4 8 16 32 64 128 255>;
- default-brightness-level = <11>;
- enable-gpios = <&gpio2 20 GPIO_ACTIVE_LOW>;
- num-interpolated-steps = <2>;
+ pinctrl-names = "default";
power-supply = <®_lvds1_reg_en>;
- pwms = <&pwm3 0 50000 0>;
+ status = "disabled";
};
fan0: fan {
@@ -43,10 +38,11 @@ fan0: fan {
#cooling-cells = <2>;
};
- panel1_lvds: panel-lvds {
- compatible = "edt,etml1010g3dra";
- backlight = <&backlight_lvds>;
+ panel_lvds1: panel-lvds1 {
+ /* compatible panel in overlay */
+ backlight = <&backlight_lvds1>;
power-supply = <®_vcc_3v3_sw>;
+ status = "disabled";
port {
panel1_in: endpoint {
@@ -232,32 +228,8 @@ led-3 {
};
};
-&lcdif2 {
- status = "okay";
-};
-
-&lvds_bridge {
- status = "okay";
-
- ports {
- port@2 {
- ldb_lvds_ch1: endpoint {
- remote-endpoint = <&panel1_in>;
- };
- };
- };
-};
-
-&media_blk_ctrl {
- /*
- * The LVDS panel on this device uses 72.4 MHz pixel clock,
- * set IMX8MP_VIDEO_PLL1 to 72.4 * 7 = 506.8 MHz so the LDB
- * serializer and LCDIFv3 scanout engine can reach accurate
- * pixel clock of exactly 72.4 MHz.
- */
- assigned-clock-rates = <500000000>, <200000000>,
- <0>, <0>, <500000000>,
- <506800000>;
+&ldb_lvds_ch1 {
+ remote-endpoint = <&panel1_in>;
};
&snvs_pwrkey {
@@ -282,9 +254,8 @@ &pcie {
};
&pwm3 {
- status = "okay";
- pinctrl-names = "default";
pinctrl-0 = <&pinctrl_pwm3>;
+ pinctrl-names = "default";
};
&rv3028 {
--
2.43.0
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