imx6qp LVDS color depth problem

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imx6qp LVDS color depth problem

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Contributor I

Hi, I'm using a custom board based on imx6qpsabresd reference board, and I have a color depth problem using LVDS display. 

111.jpg

As you can see all the pure colors are displayed very well, but the parts with gradual color changes on the top are not displayed correctly which I think it should be a color depth problem.

Here is my device tree configurations:

mxcfb1: fb@0 {
compatible = "fsl,mxc_sdc_fb";
disp_dev = "ldb";
interface_pix_fmt = "RGB24";
default_bpp = <16>;
int_clk = <0>;
late_init = <0>;
status = "okay";
};

lcd@0 {
compatible = "fsl,lcd";
ipu_id = <0>;
disp_id = <0>;
default_ifmt = "RGB24";
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_ipu1>;
status = "okay";
};

&ldb {
status = "okay";

lvds-channel@0 {
fsl,data-mapping = "spwg";
fsl,data-width = <18>;
status = "okay";
primary;
display-timings {
native-mode = <&timing0>;
timing0: lztft101c04 {
clock-frequency = <71100000>;
hactive = <1280>;
vactive = <800>;
hback-porch = <130>;
hfront-porch = <20>;
vback-porch = <10>;
vfront-porch = <10>;
hsync-len = <10>;
vsync-len = <3>;
};
};
};
};

and here is the lcd display's timing:

222.jpg

Any help would be greatly appreciate. Thanks.

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NXP TechSupport
NXP TechSupport

Hi Hepei

what bsp used in the case, please try latest nxp official releases from

source.codeaurora.org/external/imx/linux-imx  repository
linux-imx - i.MX Linux kernel 

Documentation: i.MX Software and Development Tools | NXP 

Best regards
igor
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