Linux Kernel 4.6.2 LVDS Display

Technical Support
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3

So, I have created the script: /usr/bin/lvds-single-channel.sh

#!/bin/sh
#enable the parallel RGB to LVDS controller in single channel mode

echo 216 > /sys/class/gpio/export
echo 219 > /sys/class/gpio/export
echo 222 > /sys/class/gpio/export
echo 223 > /sys/class/gpio/export
echo 226 > /sys/class/gpio/export
echo 225 > /sys/class/gpio/export
echo 221 > /sys/class/gpio/export
echo 220 > /sys/class/gpio/export

echo high  > /sys/class/gpio/gpio216/direction
echo high  > /sys/class/gpio/gpio219/direction
echo high  > /sys/class/gpio/gpio222/direction
echo high  > /sys/class/gpio/gpio223/direction
echo high  > /sys/class/gpio/gpio226/direction
echo high  > /sys/class/gpio/gpio225/direction
echo high  > /sys/class/gpio/gpio221/direction
echo high  > /sys/class/gpio/gpio220/direction

added it to the init.d directiory, and set to run during system start:

#!/bin/sh
/usr/bin/lvds-single-channel.sh

edited and deployed device tree as bellow:

panel: panel {
                /*
                 * edt,et057090dhu: EDT 5.7" LCD TFT
                 * edt,et070080dh6: EDT 7.0" LCD TFT
                 */
                compatible = "innolux,g121x1-l03", "simple-panel";

                backlight = <&backlight>;
        };

where, my panel is already defined in panel-simple.c as bellow:

static const struct drm_display_mode innolux_g121x1_l03_mode = {
        .clock = 65000,
        .hdisplay = 1024,
        .hsync_start = 1024 + 0,
        .hsync_end = 1024 + 1,
        .htotal = 1024 + 0 + 1 + 320,
        .vdisplay = 768,
        .vsync_start = 768 + 38,
        .vsync_end = 768 + 38 + 1,
        .vtotal = 768 + 38 + 1 + 0,
        .vrefresh = 60,
        .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
};

static const struct panel_desc innolux_g121x1_l03 = {
        .modes = &innolux_g121x1_l03_mode,
        .num_modes = 1,
        .bpc = 6,
        .size = {
                .width = 246,
                .height = 185,
        },
        .delay = {
                .enable = 200,
                .unprepare = 200,
                .disable = 400,
        },
};

Additionally I set boot vidargs to null, but still cannot see proper image on lvds display. I can only see random color during system start. On toradex custom kernel display works fine. How can I debug this problem? I am using apalis T30 on custom extension board. In attachment you can find xorg log link text