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Spreadspectrum for HDMI

Question asked by Sudar KB on Jun 21, 2018
Latest reply on Jun 22, 2018 by igorpadykov

I have some doubts regarding the HDMI clock sources and enabling spreadspectrum for HDMI. I am working on a custom board which has IMX6Quad. I have listed my questions below.

1) Can we enable spreadspectrum for HDMI interface? If yes, How should we enable spreadspectrum for HDMI. Is it the similar process as done for LVDS/LCD interface, where the parent clock is changed to PLL2_PFD2 for the IPU1_DI0 interface and enabling SS in PLL2?

2) I understand that there is VIDEO_27M clock source which is used to generate the TMDS signal from HDMI_PHY and it seems the IPU output is given to HDMI TX controller. How are these two clocks interlinked? will enabling SS in IPU output gets reflected on TMDS signals?

 

Thanks,
Sudar.K.B.

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