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Yocto / buildroot 1280x480 lvds display flicker

Question asked by Harshit Godha on Dec 14, 2016
Latest reply on Dec 30, 2016 by Gary Bisson

I am trying to use an iMX6 Sabrelite with 1280x480 lvds display.

its a Sharp Display LQ123K1LG03 with Frequency   1/Tc 40 53.172 56 MHz

The board boots up fine.

I have tried with both latest buildroot and Yocto (kernel 4.1.15) but no matter what clock /frequency I set in file imx6qdl-sabrelite.dtsi, there is a flicker on the screen.

 

Here is a snapshot

 

lvds-channel@0 {
          crtc = "ipu1-di1";
          fsl,data-mapping = "jeida";
          fsl,data-width = <24>;
          status = "okay";
          primary;

          display-timings {
               t_lvds: t_lvds_default {
                    /* lg1280x800 values may be changed in bootscript */
                    clock-frequency = <53172000>;
                    hactive = <1280>;
                    vactive = <480>;
                    hback-porch = <0>;
                    hfront-porch = <398>;
                    vback-porch = <0>;
                    vfront-porch = <35>;
                    hsync-len = <10>;
                    vsync-len = <10>;
               };

 

Any Idea what could be the issue?

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