From: Francesco Dolcini <francesco@dolcini.it>
To: Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>, Frank Li <Frank.Li@nxp.com>,
Sascha Hauer <s.hauer@pengutronix.de>,
Pengutronix Kernel Team <kernel@pengutronix.de>,
Fabio Estevam <festevam@gmail.com>
Cc: Francesco Dolcini <francesco.dolcini@toradex.com>,
devicetree@vger.kernel.org, imx@lists.linux.dev,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: [PATCH v1] ARM: dts: imx7d-colibri-emmc: Add VGA overlay
Date: Tue, 1 Sep 2026 14:49:20 +0200 [thread overview]
Message-ID: <20260901124921.78635-1-francesco@dolcini.it> (raw)
From: Francesco Dolcini <francesco.dolcini@toradex.com>
Add a device tree overlay for the VGA output on the Colibri iMX7 parallel
RGB LCD interface. The VGA output is driven through a non-programmable
video DAC without VESA DDC I2C signals to a DVI connector.
The overlay is also combined with the Aster, Evaluation Board v3, Iris
and Iris v2 carrier board device trees to provide ready-to-use DTBs.
Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
---
this patch is on top of https://lore.kernel.org/all/20260723105225.194366-1-francesco@dolcini.it/
---
arch/arm/boot/dts/nxp/imx/Makefile | 21 +++++++
.../dts/nxp/imx/imx7d-colibri-emmc-vga.dtso | 59 +++++++++++++++++++
2 files changed, 80 insertions(+)
create mode 100644 arch/arm/boot/dts/nxp/imx/imx7d-colibri-emmc-vga.dtso
diff --git a/arch/arm/boot/dts/nxp/imx/Makefile b/arch/arm/boot/dts/nxp/imx/Makefile
index e9f95c3b8353..d1272104ef27 100644
--- a/arch/arm/boot/dts/nxp/imx/Makefile
+++ b/arch/arm/boot/dts/nxp/imx/Makefile
@@ -436,18 +436,39 @@ imx7d-colibri-emmc-eval-v3-panel-res-touch-7inch-parallel-dtbs := \
imx7d-colibri-emmc-eval-v3.dtb \
imx7d-colibri-emmc-panel-res-touch-7inch-parallel.dtbo
+imx7d-colibri-emmc-aster-vga-dtbs := \
+ imx7d-colibri-emmc-aster.dtb \
+ imx7d-colibri-emmc-vga.dtbo
+
+imx7d-colibri-emmc-eval-v3-vga-dtbs := \
+ imx7d-colibri-emmc-eval-v3.dtb \
+ imx7d-colibri-emmc-vga.dtbo
+
+imx7d-colibri-emmc-iris-vga-dtbs := \
+ imx7d-colibri-emmc-iris.dtb \
+ imx7d-colibri-emmc-vga.dtbo
+
+imx7d-colibri-emmc-iris-v2-vga-dtbs := \
+ imx7d-colibri-emmc-iris-v2.dtb \
+ imx7d-colibri-emmc-vga.dtbo
+
dtb-$(CONFIG_SOC_IMX7D) += \
imx7d-cl-som-imx7.dtb \
imx7d-colibri-aster.dtb \
imx7d-colibri-emmc-aster.dtb \
imx7d-colibri-emmc-aster-panel-cap-touch-7inch-parallel.dtb \
+ imx7d-colibri-emmc-aster-vga.dtb \
imx7d-colibri-emmc-iris.dtb \
+ imx7d-colibri-emmc-iris-vga.dtb \
imx7d-colibri-emmc-iris-v2.dtb \
imx7d-colibri-emmc-iris-v2-panel-cap-touch-7inch-parallel.dtb \
+ imx7d-colibri-emmc-iris-v2-vga.dtb \
imx7d-colibri-emmc-eval-v3.dtb \
imx7d-colibri-emmc-eval-v3-panel-cap-touch-7inch-parallel-touch-adapter.dtb \
imx7d-colibri-emmc-eval-v3-panel-res-touch-7inch-parallel.dtb \
+ imx7d-colibri-emmc-eval-v3-vga.dtb \
imx7d-colibri-emmc-panel-cap-touch-7inch-parallel.dtbo \
+ imx7d-colibri-emmc-vga.dtbo \
imx7d-colibri-eval-v3.dtb \
imx7d-colibri-iris.dtb \
imx7d-colibri-iris-v2.dtb \
diff --git a/arch/arm/boot/dts/nxp/imx/imx7d-colibri-emmc-vga.dtso b/arch/arm/boot/dts/nxp/imx/imx7d-colibri-emmc-vga.dtso
new file mode 100644
index 000000000000..cda214c13876
--- /dev/null
+++ b/arch/arm/boot/dts/nxp/imx/imx7d-colibri-emmc-vga.dtso
@@ -0,0 +1,59 @@
+// SPDX-License-Identifier: GPL-2.0-only OR MIT
+/*
+ * Copyright (c) Toradex
+ *
+ * VGA output connected to the Colibri parallel RGB LCD interface through a
+ * non-programmable video DAC with a DVI connector.
+ *
+ * The VGA output is available on multiple carrier boards (including Iris,
+ * Eval, Aster) without VESA DDC I2C signals.
+ */
+
+/dts-v1/;
+/plugin/;
+
+&{/} {
+ vga-encoder {
+ compatible = "dumb-vga-dac";
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port@0 {
+ reg = <0>;
+
+ vga_enc_in: endpoint {
+ remote-endpoint = <&lcdif_out>;
+ };
+ };
+
+ port@1 {
+ reg = <1>;
+
+ vga_enc_out: endpoint {
+ remote-endpoint = <&dvi_connector_in>;
+ };
+ };
+ };
+ };
+
+ dvi-connector {
+ compatible = "dvi-connector";
+ analog;
+
+ port {
+ dvi_connector_in: endpoint {
+ remote-endpoint = <&vga_enc_out>;
+ };
+ };
+ };
+};
+
+&lcdif {
+ status = "okay";
+};
+
+&lcdif_out {
+ remote-endpoint = <&vga_enc_in>;
+};
--
2.47.3
next reply other threads:[~2026-09-01 12:49 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-01 12:49 Francesco Dolcini [this message]
2026-09-01 16:22 ` [PATCH v1] ARM: dts: imx7d-colibri-emmc: Add VGA overlay Frank Li
2026-09-11 19:03 ` Frank.Li
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