HDMI interface forced output based on IMX8MQ chip

[ximenbingmeng]

I am currently using the IMX8MQ chip and using the kernel 5.10.72 provided by the supplier. But we originally used kernel 4.14.98, and all of our research was based on kernel 4.14.98, including the HDMI interface mandatory output of the IMX8MQ chip. Originally, we referred to the attached document below.
But there is no HPD folder and drivers/gpu/drm/imx/hdp/imx HPD. c file in kernel 5.10.72. So, how should we modify it under the DRM framework in the new version (kernel 5.10.72), and do we have a reference manual?
Looking forward to your reply, thank you very much!

[Alejandro_Salas]

Hello @ximenbingmeng 

Please refer to IMX Reference Manual (chapter 6.4.6 High-Definition Multimedia Interface (HDMI) and Display Port (DP) Overview) to get more details about how to works HDP core API:

I hope this can helps to you.

Best regards,

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Salas.