* [PATCH v1] ARM: dts: imx7d-colibri-emmc: Add VGA overlay
@ 2026-09-01 12:49 Francesco Dolcini
2026-09-01 16:22 ` Frank Li
0 siblings, 1 reply; 2+ messages in thread
From: Francesco Dolcini @ 2026-09-01 12:49 UTC (permalink / raw)
To: Rob Herring, Krzysztof Kozlowski, Conor Dooley, Frank Li,
Sascha Hauer, Pengutronix Kernel Team, Fabio Estevam
Cc: Francesco Dolcini, devicetree, imx, linux-arm-kernel,
linux-kernel
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
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH v1] ARM: dts: imx7d-colibri-emmc: Add VGA overlay
2026-09-01 12:49 [PATCH v1] ARM: dts: imx7d-colibri-emmc: Add VGA overlay Francesco Dolcini
@ 2026-09-01 16:22 ` Frank Li
0 siblings, 0 replies; 2+ messages in thread
From: Frank Li @ 2026-09-01 16:22 UTC (permalink / raw)
To: Francesco Dolcini
Cc: Rob Herring, Krzysztof Kozlowski, Conor Dooley, Frank Li,
Sascha Hauer, Pengutronix Kernel Team, Fabio Estevam,
Francesco Dolcini, devicetree, imx, linux-arm-kernel,
linux-kernel
On Tue, Sep 01, 2026 at 02:49:20PM +0200, Francesco Dolcini wrote:
> 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
> +
Thanks for reuse overlay file.
Frank
> 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
>
>
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