Hello everybody, I’m using a 24bit single channel LVDS display @ 1920x720 resolution with a Toradex TK1.
I configured timings and other parameter in the device tree and the display shows the desktop after startup. Resolution seems fine but it has a strange issue with colors. I’m not sure if it is a display timings problem or a software configuration. This is what I see:
The image is not crisp and the bottom bar seems mixed or low color. The mouse arrow is fine in the entire dislpay so I assume that is not a timing problem but I’m ready to change idea.
Another strange thing is that before LXDE starts there is the touch calibration screen and that seems to be clear and crisp.
Here is a detail with the mouse over the menu bar:
This is an extract of the device tree:
lvds:lvds {
status = "okay";
display {
status = "okay";
lvds-drive-strength = <0x40 0x40 0x40 0x40 0x40>;
disp-default-out {
status = "okay";
nvidia,out-type = <TEGRA_DC_OUT_LVDS>;
nvidia,out-flags = <TEGRA_DC_OUT_CONTINUOUS_MODE>;
nvidia,out-parent-clk = "pll_d_out0";
nvidia,out-max-pixclk = <3367>; /* KHZ2PICOS(297000) */
nvidia,out-align = <TEGRA_DC_ALIGN_MSB>;
nvidia,out-order = <TEGRA_DC_ORDER_RED_BLUE>;
nvidia,out-depth = <24>;
nvidia,out-lvds-mode = <TEGRA_DC_LVDS_24_0>;
nvidia,out-xres = <1920>;
nvidia,out-yres = <720>;
};
display-timings {
timing_1920_720: 1920x720 {
clock-frequency = <85000000>;
nvidia,h-ref-to-sync = <1>;
nvidia,v-ref-to-sync = <1>;
hsync-len = <32>;
vsync-len = <10>;
hback-porch = <64>;
vback-porch = <20>;
hactive = <1920>;
vactive = <720>;
hfront-porch = <32>;
vfront-porch = <10>;
};
};
dc@54200000 {
status = "okay";
nvidia,dc-connection = <&lvds>;
nvidia,dc-flags = <TEGRA_DC_FLAG_ENABLED>;
nvidia,emc-clk-rate = <300000000>;
nvidia,fb-bpp = <32>; /* bits per pixel */
nvidia,fb-flags = <TEGRA_FB_FLIP_ON_PROBE>;
avdd-supply = <&as3722_ldo4>;
};
Any suggestion?
Thanks