Dual Channel 1920x1080 LVDS Support on i.MX6

cwatkin — Sat, 17 Nov 2018 00:11:13 GMT

I am trying to add a 1920 x 1080 LVDS display, using both LVDS channels, on a i.MX6 SOM. I have been unable to find a guide or reference that explains how to use the parameters in the display data sheet in order to set up the timing parameters for dual channel LVDS. The display is at 960 x 1080 resolution right now.

Display model: AUO-P320HVN03 (Data sheet attached)

My device tree is set up as follows:

&mxcfb1 {
interface_pix_fmt = "RGB24";
compatible = "fsl,mxc_sdc_fb";
};

&ldb {
status = "okay";
split-mode;
lvds-channel@0 {
fsl,data-mapping = "spwg";
fsl,data-width = <24>;
primary;
status = "okay";
display-timings {
timing01: AUO-P320HVN03 {
clock-frequency = <74250000>;
hactive = <960>;
hsync-len = <140>;
hback-porch = <0>;
hfront-porch = <0>;
vactive = <1080>;
vsync-len = <45>;
vback-porch = <0>;
vfront-porch = <0>;
}; }; };
lvds-channel@1 {
fsl,data-mapping = "spwg";
fsl,data-width = <24>;
primary;
status = "okay";
display-timings {
timing02: AUO-P320HVN03 {
clock-frequency = <74250000>;
hactive = <960>;
hsync-len = <140>;
hback-porch = <0>;
hfront-porch = <0>;
vactive = <1080>;
vsync-len = <45>;
vback-porch = <0>;
vfront-porch = <0>;
}; }; };

};

Re: Dual Channel 1920x1080 LVDS Support on i.MX6

igorpadykov — Wed, 21 Nov 2018 10:42:02 GMT

Hi Chris

dts example with "split-mode" can be found on

linux-imx6/imx6qdl-eo.dtsi at boundary-imx_4.9.x_2.0.0_ga · boundarydevices/linux-imx6 · GitHub

960 x 1080 resolution right now seems due to record "hactive = <960>".

For understanding how it works may be useful to check

https://community.nxp.com/thread/320994

Best regards
igor
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Dual Channel 1920x1080 LVDS Support on i.MX6

Re: Dual Channel 1920x1080 LVDS Support on i.MX6