LCD flickering when switching form u-boot to kernel

Hi,

Which Linux version are you using? You will need to skip the kernel re-initialization of the LCD controller.

Hi,

Which version of the TI SDK are you using? You need to NOT reinitialize the LCD at kernel start. I think this happens inside <linux>/arch/arm/mach-omap2/omap_hwmod_33xx_data.c. I believe you need to pass HWMOD_INIT_NO_RESET to the am33xx_lcdc_hwmod structure .flags member.

HWMOD_INIT_NO_RESET: don't reset this module at boot

Best regards,
Miroslav

Hi Biser,

         Linux version is 3.2

Regards,

Yashavadan Dalsaniya

Hi Miroslav,

Thank you for showing interest in my query.......

I have passed HWMOD_INIT_NO_RESET  flag into am33xx_lcdc_hwmod structure, but still the behaviour is same.

White line is coming in LOGO while switching from U-boot to kernel.

I am using kernel 3.2.0 and SDK 04.06.00.10.

Hi all,

We have displayed boot logo from u-boot as well as kernel. From both (u-boot and kernel) logo is displaying, but while switching from u-boot to kernel it shows white line on display(horizontal line) for small duration(while lcd is initializing from kernel).

I am using kernel 3.2.0 SDK version 04.06.00.10. my board having AM3352 processor.

It looks bad and i want to remove white line, please help me out from this problem.

I have tried HWMOD_INIT_NO_RESET  flag into am33xx_lcdc_hwmod structure, but issue is not resolved.

Regards,

Yashavadan dalsaniya