Re: [PATCH v4 4/4] arm64: dts: freescale: Add dual-channel LVDS overlay for TQMa8MPxS

[Alexander Stein]

Hi Frank,

Am Freitag, 5. Juni 2026, 18:47:07 CEST schrieb Frank Li:
> On Wed, Jun 03, 2026 at 11:36:09AM +0200, Alexander Stein wrote:
> > This adds an overlay for the supported LVDS display AUO G133HAN01.
> > Configure the video PLL frequency to exactly match typical pixel clock of
> > 141.200 MHz.
> >
> > Signed-off-by: Alexander Stein <alexander.stein@xxxxxxxxxxxxxxx>
> > ---
> 
> Can you fix W=1 dtb build warnings?

That would require to duplicate the setting from imx8mp.dtsi. Is this really
intended?

imx8mp-tqma8mpqs-mb-smarc-2-lvds-g133han01.dtso:51.10-55.5: Warning (unit_address_vs_reg): /fragment@3/__overlay__/ports/port@1: node has a unit name, but no reg or ranges property
imx8mp-tqma8mpqs-mb-smarc-2-lvds-g133han01.dtso:57.10-61.5: Warning (unit_address_vs_reg): /fragment@3/__overlay__/ports/port@2: node has a unit name, but no reg or ranges property

IMHO this warning is not suitable for .dtbo, while it is for .dtb
(with applied overlays). The .dtbo doesn't have all the information.

Best reagrds
Alexander

> Frank
> 
> > Changes in v4:
> > * New to series v4
> >
> >  arch/arm64/boot/dts/freescale/Makefile        |  2 +
> >  ...p-tqma8mpqs-mb-smarc-2-lvds-g133han01.dtso | 74 +++++++++++++++++++
> >  2 files changed, 76 insertions(+)
> >  create mode 100644 arch/arm64/boot/dts/freescale/imx8mp-tqma8mpqs-mb-smarc-2-lvds-g133han01.dtso
> >
> > diff --git a/arch/arm64/boot/dts/freescale/Makefile b/arch/arm64/boot/dts/freescale/Makefile
> > index dee2bea156740..3f466f102dc1d 100644
> > --- a/arch/arm64/boot/dts/freescale/Makefile
> > +++ b/arch/arm64/boot/dts/freescale/Makefile
> > @@ -385,8 +385,10 @@ dtb-$(CONFIG_ARCH_MXC) += imx8mp-tqma8mpql-mba8mp-ras314-imx219.dtbo
> >  dtb-$(CONFIG_ARCH_MXC) += imx8mp-tqma8mpql-mba8mp-ras314-lvds-tm070jvhg33.dtb
> >  dtb-$(CONFIG_ARCH_MXC) += imx8mp-tqma8mpql-mba8mp-ras314-lvds-tm070jvhg33-imx219.dtb
> >
> > +imx8mp-tqma8mpqs-mb-smarc-2-lvds-g133han01-dtbs += imx8mp-tqma8mpqs-mb-smarc-2.dtb imx8mp-tqma8mpqs-mb-smarc-2-lvds-g133han01.dtbo
> >  imx8mp-tqma8mpqs-mb-smarc-2-lvds0-tm070jvhg33-dtbs += imx8mp-tqma8mpqs-mb-smarc-2.dtb imx8mp-tqma8mpqs-mb-smarc-2-lvds0-tm070jvhg33.dtbo
> >  imx8mp-tqma8mpqs-mb-smarc-2-lvds1-tm070jvhg33-dtbs += imx8mp-tqma8mpqs-mb-smarc-2.dtb imx8mp-tqma8mpqs-mb-smarc-2-lvds1-tm070jvhg33.dtbo
> > +dtb-$(CONFIG_ARCH_MXC) += imx8mp-tqma8mpqs-mb-smarc-2-lvds-g133han01.dtb
> >  dtb-$(CONFIG_ARCH_MXC) += imx8mp-tqma8mpqs-mb-smarc-2-lvds0-tm070jvhg33.dtb
> >  dtb-$(CONFIG_ARCH_MXC) += imx8mp-tqma8mpqs-mb-smarc-2-lvds1-tm070jvhg33.dtb
> >
> > diff --git a/arch/arm64/boot/dts/freescale/imx8mp-tqma8mpqs-mb-smarc-2-lvds-g133han01.dtso b/arch/arm64/boot/dts/freescale/imx8mp-tqma8mpqs-mb-smarc-2-lvds-g133han01.dtso
> > new file mode 100644
> > index 0000000000000..9595cf4d43cd0
> > --- /dev/null
> > +++ b/arch/arm64/boot/dts/freescale/imx8mp-tqma8mpqs-mb-smarc-2-lvds-g133han01.dtso
> > @@ -0,0 +1,74 @@
> > +// SPDX-License-Identifier: (GPL-2.0-or-later OR MIT)
> > +/*
> > + * Copyright (c) 2025-2026 TQ-Systems GmbH <linux@xxxxxxxxxxxxxxx>,
> > + * D-82229 Seefeld, Germany.
> > + * Author: Martin Schmiedel
> > + */
> > +
> > +/dts-v1/;
> > +/plugin/;
> > +
> > +&backlight_lvds0 {
> > +	status = "okay";
> > +};
> > +
> > +&panel_lvds0 {
> > +	compatible = "auo,g133han01";
> > +	status = "okay";
> > +
> > +	ports {
> > +		#address-cells = <1>;
> > +		#size-cells = <0>;
> > +
> > +		port@0 {
> > +			reg = <0>;
> > +			dual-lvds-odd-pixels;
> > +
> > +			panel_in_lvds0: endpoint {
> > +				remote-endpoint = <&ldb_lvds_ch0>;
> > +			};
> > +		};
> > +
> > +		port@1 {
> > +			reg = <1>;
> > +			dual-lvds-even-pixels;
> > +
> > +			panel_in_lvds1: endpoint {
> > +				remote-endpoint = <&ldb_lvds_ch1>;
> > +			};
> > +		};
> > +	};
> > +};
> > +
> > +&lcdif2 {
> > +	status = "okay";
> > +};
> > +
> > +&lvds_bridge {
> > +	status = "okay";
> > +
> > +	ports {
> > +		port@1 {
> > +			ldb_lvds_ch0: endpoint {
> > +				remote-endpoint = <&panel_in_lvds0>;
> > +			};
> > +		};
> > +
> > +		port@2 {
> > +			ldb_lvds_ch1: endpoint {
> > +				remote-endpoint = <&panel_in_lvds1>;
> > +			};
> > +		};
> > +	};
> > +};
> > +
> > +// Update VIDEO_PLL1 frequency
> > +&media_blk_ctrl {
> > +	assigned-clock-rates = <500000000>, <200000000>,
> > +			       <0>, <0>, <500000000>,
> > +			       <988400000>;
> > +};
> > +
> > +&pwm3 {
> > +	status = "okay";
> > +};
> > --
> > 2.54.0
> >
> 


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