How to set HDMI TX PLL tunes

[cotway]

when i custom hdmi pixel clk ,i dont know how to set VCO configs.the Thirteenth table is my target(VCO_FRE=2929500)，but how to config coar and cod（NDAC PMOS PTAT div-T P-Gain Coa V2I CAL）?

  pls help me. tks.

[igorpadykov]

Hi Cot

may be useful to look at below link

https://community.nxp.com/t5/i-MX-Processors/HDMI-DRM-custom-resolution-and-clock-frequency/m-p/1029...

Best regards
igor

[cotway]

@igorpadykov

However, there is still a problem with this, and the output is unstable。I only see the output for a moment。

Are you  sure modify only this structure?My problem is the red marked structure in the screenshot。

[igorpadykov]

yes only linux structure should be updated, no need to set pll values directly.

Best regards
igor

[cotway]

@igorpadykov 

Kernel version I use is 5.4.3 and only this version can be used。i get structure's parameter by HDMI - pixel clock calculation.xlsx .but these different from the code,can you update the xlsx. 

For example 148.5Mhz and vco 5940Mhz：

 code:

xlsx：

[cotway]

@igorpadykov 

Do you mean that the PLL configuration must be one of these twelve?