AnsweredAssumed Answered

display issues with 3.14 kernel on imx53 boards

Question asked by belgianwaffle on Apr 7, 2015
Latest reply on Apr 14, 2015 by alejandrolozano

We are having some issues with the display settings in the device tree not being set. I am seeing the same issue on our imx53 based board and on the imx53-qsb eval board (formally LOCO).


Basically when I check settings with fbset, they are not what's in the dts.


For example here is the eval board dts...

display@di0 {

    compatible = "fsl,imx-parallel-display";

    crtcs = <&ipu 0>;

    interface-pix-fmt = "rgb565";

    pinctrl-names = "default";

    pinctrl-0 = <&pinctrl_ipu_disp0_1>;

    status = "disabled";

    display-timings {

        claawvga {


            clock-frequency = <27000000>;

            hactive = <800>;

            vactive = <480>;

            hback-porch = <40>;

            hfront-porch = <60>;

            vback-porch = <10>;

            vfront-porch = <10>;

            hsync-len = <20>;

            vsync-len = <10>;

            hsync-active = <0>;

            vsync-active = <0>;

            de-active = <1>;

            pixelclk-active = <0>;




And here is fbset output...

root@freescale ~$ fbset

mode "1024x768"

    geometry 1024 768 1024 768 16

    timings 0 0 0 0 0 0 0

    accel true

    rgba 5/11,6/5,5/0,0/0


As you can see the setting are not correct and the timings are all zero's.


Here's the relevant sys.log excerpt...

imx-drm imx-drm: No connectors reported connected with modes

[drm] Cannot find any crtc or sizes - going 1024x768

Console: switching to colour frame buffer device 128x48

imx-drm imx-drm: fb0:  frame buffer device

imx-drm imx-drm: registered panic notifier

Our custom board behaves about the same way with similar sys.log messages.


The eval board display has a bunch of lines. Our board seems a bit better with just the colors being off. Presumably because the timings are all zero's. I'm also seeing the same issue on our mx51 based system.


I was really hoping the eval board was going to work with the latest kernel since we are in the middle of upgrading also.  Am I missing something? Any help would be greatly appreciated as to why the dts display settings are not being set.