How to reduce video delay in iMX8QM.

[hsaito]

Is there any way to reduce the delay time for LVDS output?

(e.g., shorten the delay time by modifying the video output driver.)

Is it possible to reduce the delay time by modifying software?

The delay time is measured using the following commands in gstreamer.

gst-launch-1.0 v4l2src device=/dev/video0 ! autovideosink

[Dhruvit]

Hi @hsaito,

I hope you are doing well.

->Yes, it is possible to reduce the delay time(Latency) for LVDS output in IMX8QM.
->Please make sure to use a faster clock speed(Pixel Clock), One can Increase the clock speed will reduce the delay time.
->But It may impact the image quality. & it may depend on whether the display one is using is supported or not.

sink_vif_clk = Video Pixel Clock output with the VIF data. -> 24-600Mhz
sink_phy_pixel_clk = Video Pixel Clock coming from the PHY. -> 24-600Mhz

for more details please refer to the section LVDS in the RM.

https://www.nxp.com/webapp/Download?colCode=IMX8QMRM

Thanks & Regards,

Dhruvit Vasavada