iMX8QM HDMI RX and MIPI-CSI Media issue

[prashanthkumar]

Hi,

We are working on iMX8QM custom board (B0  CPU) with 4.14.98 Kernel BSP.

Here, both HDMI-RX and MIPI-CSI (OV5640 Camera) are working individually. We used following reference MEK DTS files,

arch/arm64/boot/dts/freescale/fsl-imx8qm-mek-ov5640.dts -------- For MIPI-CSI ov5640 camera

arch/arm64/boot/dts/freescale/fsl-imx8qm-mek-hdmi-in.dts -------- For HDMI RX

While cconfiguring both HDMI-RX and MIPI-CSI nodes in DTS file, the '/dev/videox' nodes are not generating in file system.

The DTS configuration as below,

/* Multimedia: Image Sensing Interface */
&isi_0 {
        status = "okay";
};

&isi_1 {
        status = "okay";
};

/* HDMI: HDMI-RX */
&isi_2 {
        interface = <4 0 2>;  /* <Input MIPI_VCx Output>
                                Input:  0-DC0, 1-DC1, 2-MIPI CSI0, 3-MIPI CSI1, 4-HDMI, 5-MEM
                                VCx:    0-VC0, 1-VC1, 2-VC2, 3-VC3, MIPI CSI only
                                Output: 0-DC0, 1-DC1, 2-MEM */
         status = "okay";
};

&isi_3 {
        /* For HDMI RX 4K chain buf */
        interface = <4 0 2>;
        status = "okay";
};

&isi_4 {
        status = "okay";
};

&isi_5 {
        status = "okay";
};

&isi_6 {
        status = "okay";
};

&isi_7 {
        status = "okay";
};

Is this configuration correct? Is  it possible to configure both HDMI-RX and MIPI-CSI (OV5640 Camera) simultaneously in DTS file?

Best Regards,

Prashanth Kumar K

[jiangyaqiang]

HI  prashanth:

I got the same problem, have you fixed it ?

[AldoG]

Hello,

Please take a look to this app note

AN5125,

and also take a look to this presentation

Device Tree Made Easy

This may be helpful for you

Unfortunately the i.MX8X family is not officially supported yet, please note that i.MX8QM processor is still in pre-production stage, sorry for the inconvenience and the problems this may cause.

Thank you for your understanding,

Best regards,
Aldo.