topic Re: LCD display 4 small images when Starting kernel in i.MX Processors

LCD display 4 small images when Starting kernel

ganboshi — Mon, 04 Jun 2018 02:05:44 GMT

I am in trouble,

the RGB LCD display logo is normal in uboot and kernel, but the LCD flash 4 small images when from uboot to kernel about 300ms when starting kernel. the port of LVDS0_DATA0,LVDS0_DATA1,LVDS0_DATA2 have abnormal signal, but the port of LVDS0_CLK is normal through the Oscilloscope.

I use I.MX6DL over LVDS port connect to TM035KBH02 transform RGB signal to 320x240 LCD.

My Linux environment is 4.1.15

I don't know what config is incorrect when start kernel, so i need some help, thanks a lot.

LVDS0_DATA0 waveform:

Re: LCD display 4 small images when Starting kernel

igorpadykov — Mon, 04 Jun 2018 22:59:53 GMT

Hi Ganbo

please try patches from

Patch to support uboot logo keep from uboot to kernel for NXP Linux and Android BSP (HDMI, LCD and LVDS)

and nxp linux

linux-imx - i.MX Linux kernel

Best regards
igor
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Re: LCD display 4 small images when Starting kernel

ganboshi — Tue, 05 Jun 2018 09:58:19 GMT

Hi igor

Thanks for your support, I have fix my problem after use the 4.1.15 patch.