How to stop refresh LCD when sleep for i.MX6ULL

[jimmyli]

Hi,

    For better EMC, we need to stop LCD refreshing when i.MX6ULL goes to sleep.

    Can it be realized ?

    Platform: i.MX6ULL

    System:   Linux

    Thanks very much.

[AldoG · Accepted solution]

Hello,

Yes it is possible to do it, you may disable video PLL in the low power mode you want to have it disable, also remember to add it to the turn on sequence.
https://github.com/nxp-imx/linux-imx/blob/lf-6.6.y/arch/arm/mach-imx/imx6ull_low_power_idle.S

Best regards/Saludos,
Aldo.

[jimmyli]

Hello Aldo,
Thanks for your suggestion.