i.MX ProcessorsのトピックRe: display flickers during startup

display flickers during startup

celiley — Sun, 09 Aug 2020 10:59:25 GMT

Hello,

I am using iMX6QuadPlus processor with TFT display. The designed board for display meets all electrical and timing requirements on the datasheet. The display flickers at start-up and reset time for 1-2 seconds then works fine. Below is the oscilloscope image including data enable, clock and data signals. The area between cursors belongs time of flickering state. Is there any way to deactive data enable signal? I guess it's about to modules before Display Interface block of IPU but I couldn’t find what can cause this problem.

Glad if you help me

Regards,

Celile

Re: display flickers during startup

igorpadykov — Mon, 10 Aug 2020 23:03:00 GMT

Hi Celile

>Is there any way to deactive data enable signal?

one can try to set necessary level in plugin :

plugin.S\mx6sabresd\freescale\board - uboot-imx - i.MX U-Boot

Also may be recommended to check display power up sequence

defined in its datasheet. One can consider below patches;

https://community.nxp.com/docs/DOC-98109

Best regards
igor
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Re: display flickers during startup

celiley — Fri, 21 Aug 2020 06:52:43 GMT

Hi,

Sorry for the late reply. The problem has solved when display pin configurations moved from BSP to DI module in system load. Thank you for your help