How to Enable the LVDS-HDMI Driver in Yocto Build

[subbuemdtest]

Hi @nxp Team,

A few days ago, I completed a Yocto build with the following configuration:

Build Configuration:

BB_VERSION = "2.8.0"

BUILD_SYS = "x86_64-linux"

NATIVELSBSTRING = "universal"

TARGET_SYS = "aarch64-poky-linux"

MACHINE = "imx8qxpc0mek"

DISTRO = "fsl-imx-xwayland"

DISTRO_VERSION = "6.6-scarlettsnap"

TUNE_FEATURES = "aarch64 armv8a crc crypto"

I used the following command to build the image:

bitbake imx-image-full

I would like your support in achieving the following tasks in my Yocto image:

1. How to enable the LVDS-HDMI drivers.

2. How to add Qt6 tools.

3. How to include FFmpeg.

Could you kindly guide me on how to achieve these?

Thanks and regards,

Subbu

[Zhiming_Liu]

Hello,

The default MEK dtb has supported LVDS-HDMI driver. The imx-image-full also support QT6.

i.MX board doesn't provide hardware acceleration for ffmpeg

Best Regards,
Zhiming

[subbuemdtest]

Hi @Zhiming,
1. Do I need to modify the local.conf file in my build environment to add the Qt application tools to the image?


2. While We are using default MEK dtb files we getting below error please provide your support to reslove this.


[ 3.251394] it6263 17-004c: Probe failed. Remote port 'lvds-channel@0' disabled
[ 3.354223] it6263 18-004c: Probe failed. Remote port 'lvds-channel@0' disabled
[ 3.518664] debugfs: Directory 'lvds1' with parent 'pm_genpd' already present!

Thanks,
subbu

[Zhiming_Liu]

Hello,

Please check your hardware connection, you need use the second LVDS interface.

Best Regards,
Zhiming

[subbuemdtest]

Hi @Zhiming_Liu,

To enable the LVDS-HDMI channel, do we need to modify any kernel device tree file? If yes, could you please let me know which files need to be changed to enable LVDS-HDMI in the Yocto image?

I would appreciate your support on this.

Best regards,
subbu.

[Zhiming_Liu]

Hello,

You don't need to modify code as the default dts connect the second lvds interface to IT6263 LVDS-HDMI bridge.

&ldb2 {
	status = "okay";

	lvds-channel@0 {
		fsl,data-mapping = "jeida";
		fsl,data-width = <24>;
		status = "okay";

		port@1 {
			reg = <1>;

			lvds1_out: endpoint {
				remote-endpoint = <&it6263_1_in>;
			};
		};
	};
};

Best Regards,
Zhiming

[subbuemdtest]

Hi @Zhiming_Liu ,

We have done a custom Yocto build using this guide: (https://www.nxp.com/docs/en/user-guide/IMX_YOCTO_PROJECT_USERS_GUIDE.pdf).

We are trying to enable the "i.MX 8QuadXPlus Multisensory Enablement Kit (MEK)" (https://www.nxp.com/design/design-center/development-boards-and-designs/i-mx-evaluation-and-developm...)

using the Yocto custom image (linux-imx), and we are trying to interface an LVDS to HDMI converter from NXP (https://www.nxp.com/part/IMX-LVDS-HDMI).

We are unable to view the HDMI port in the Linux device tree. How do we enable it?

Provide the exact steps to be done clearly.

kindly provide your support.

[Zhiming_Liu]

Hello,

The default dts has enabled this module, please refer the previous reply.

Best Regards,
Zhiming

[subbuemdtest]

Hi @Zhiming_Liu,
Kindly provide support for the above.

Thanks,
Subbu

[subbuemdtest]

Hi @Zhiming,

We are waiting for your reply please provide the solution to resolve above issue.

Thanks.
Subbu

[subbuemdtest]

Hi @nxp team,

Waiting for your Support. Kindly provide ur support regarding above.

Thanks,
Subbu