How to switch the mode of HDMI TX in i.MX8M

[ko-hey]

Hi all

I have a question about HDMI TX in i.MX8M.

According to the chapter 13.4 of following document, the HD Display Transmitter Controller (HDMI TX) IP supports some protocols and it seems that it can switch by register or software configuration.

https://www.nxp.com/docs/en/reference-manual/IMX8MDQLQRM.pdf

How can use switch the protocols ?

If it can switch by a register, please specify it.

On the other hand, if it can switch the protocol by only software, please provide me a sample source.

Ko-hey

[Yuri · Accepted solution]

Hello,

  For a HD Display TX controller supporting multi-protocols, switching

between the two modes (HDMI and DisplayPort) requires reloading the

appropriate FW.

Have a great day,
Yuri

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[ko-hey]

Hi Yuri Muhin

Does it need reset after reloading the FW ?

Ko-hey

[Yuri]

Hello,

  HDMI FW, required for HDMI controller should be loaded at i.MX8M boot

stage, without following system reset.

Regards,

Yuri.