how to output video to LCD port from progressive to interlaced IMX6ULL

[hoanganh]

Hi,

I need create cvbs ouput from imx6ull to cvbs through LCD interface by adv7343, resolution from my imx6ull is 720x576p

But adv7343 only accept 720x576i (interlaced  support) for this resolution.

How to chage output from 720x576p to 720x576i.

I saw https://community.nxp.com/t5/i-MX-Processors-Knowledge-Base/Patch-to-Support-BT656-and-BT1120-Output...

but that patch not support imx6ull, it haven't ipu. I can't apply it.

Please give me any solution?

Thanks.

[igorpadykov]

Hi Vũ

one can try to follow sect.34.4.1.1 Bus Master Operation in Write/Display Modes

i.MX 6ULL Applications Processor Reference Manual

"eLCDIF also provides the capability of interlacing a progressive frame by fetching odd
lines in the first field and then fetching even lines in the second field. This feature can be
used in the DVI mode and can be turned on by setting the INTERLACE_FIELDS bit in
the LCDIF_CTRL1 register."

Best regards
igor

[hoanganh]

Hi igor,

I saw only Dotclock is supported on mxsfb.c at: driver/video/fbdev/mxsfb.c

So, how to switch from Dotclock to DVI on imx6ull.

[igorpadykov · Accepted solution]

Hi Vũ

seems currently mxsfb.c does not support it so you should add such support himself.

In general NXP has special service for driver customization :  https://contact.nxp.com/new-prof-svcs-sw-tech

Best regards
igor