imx6ul-evk lcd could not working

[fresxc]

Hi,all

   I'm using the imx6ul-evk board, The lcd could not work. The log is following:

21c8000.lcdif supply lcd not found, using dummy regulator

mxsfb 21c8000.lcdif: failed to find mxc display driver

mxsfb 21c8000.lcdif: initialized

my DT:

&lcdif {
   pinctrl-names = "default";
   pinctrl-0 = <&pinctrl_lcdif_dat
                     &pinctrl_lcdif_ctrl>;
   display = <&display0>;
   status = "okay";

   display0: display {
      bits-per-pixel = <32>;
      bus-width = <24>;

      display-timings {
         native-mode = <&timing0>;
         timing0: timing0 {
            clock-frequency = <65000000>;
            hactive = <1024>;
            vactive = <768>;
            hback-porch = <220>;
            hfront-porch = <40>;
            hsync-len = <48>;
            vback-porch = <21>;
            vfront-porch = <7>;
            vsync-len = <60>;

            hsync-active = <0>;
            vsync-active = <0>;
            de-active = <0>; // 1: DE mode
            pixelclk-active = <0>;
         };
      };

   };

};

Could any one help me to solve this issue?

Thanks

Fresxc

[liangmu]

Hi Fresxc,

How do you solve the problem that uboot can be used and kernel does not display?

Leon

[igorpadykov]

Hi Fresxc

what bsp used in the case, could you try with L4.1.15

http://git.freescale.com/git/cgit.cgi/imx/linux-2.6-imx.git/?h=imx_4.1.15_1.0.0_ga

http://www.nxp.com/webapp/Download?colCode=L4.1.15_1.1.0_LINUX_DOCS&Parent_nodeId=133769948107170617... 

Is it working in uboot, enabled in include/configs/mx6ul_14x14_evk.h   

with #define CONFIG_VIDEO 

Best regards
igor
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[fresxc]

Hi,Igor

Yes, i'm using L4.1.15_1.2.0. How can i fix the following error?

mxsfb 21c8000.lcdif: failed to find mxc display driver

Thanks

Fresxc

[igorpadykov · Accepted solution]

Hi Fresxc

this specific error one can debug in driver probe function using Chapter 12
ELCDIF Frame Buffer Driver attached Linux Manual.

However easier way to check if it is working ok in uboot.

uboot-imx.git - Freescale i.MX u-boot Tree 

Best regards
igor

[fresxc]

Hi Igor

The LCD is working well on iMX6Q-SABRESD and the same kernel. 

I do not know how can i check it in uboot, do you have any way?

Thanks

Fresxc

[igorpadykov]

for test in uboot please change lcd_panel_info_t with custom lcd parameters in
http://git.freescale.com/git/cgit.cgi/imx/uboot-imx.git/tree/board/freescale/mx6ul_14x14_evk/mx6ul_1...
and rebuild uboot using attached document Chapter 1 Porting U-Boot

Best regards
igor

[fresxc]

Hi Igor

It is working well in uboot and kernel now. Although the error is there. I will debug the error message later.

Thanks for your help!

Fresxc