Hello,
According to the i.MX8QM datasheet, there is support for up to 4 independent displays:
Supports single UltraHD 4Kp60 display or up to 4 independent FullHD 1080p60
displays
However, I have been unsuccessful so far in getting four independent 4-lane LVDS channels. The code snippet below is my attempt to get ldb1 to support two independent 10.1" LVDS displays. If I comment out lvds-channel@0 I can get one display to work. If I comment out lvds-channel@1 I can get the other display to work. However with both uncommented neither work.
I have reviewed imx8qm-mek-jdi-wuxga-lvds1-panel.dtsi, but this does not offer any additional insight. How can I achieve 4 independent LVDS channels?
/ {
panel0: panel0 {
status = "okay";
compatible = "panel-lvds";
data-mapping = "vesa-24";
width-mm = <217>;
height-mm = <136>;
panel-timing {
clock-frequency = <72000000>;
hactive = <1280>;
vactive = <800>;
hback-porch = <48>;
hfront-porch = <80>;
vback-porch = <15>;
vfront-porch = <2>;
hsync-len = <32>;
vsync-len = <6>;
};
port {
panel0_input: endpoint {
remote-endpoint = <&lvds0_out>;
};
};
};
panel1: panel1 {
status = "okay";
compatible = "panel-lvds";
data-mapping = "vesa-24";
width-mm = <217>;
height-mm = <136>;
panel-timing {
clock-frequency = <72000000>;
hactive = <1280>;
vactive = <800>;
hback-porch = <48>;
hfront-porch = <80>;
vback-porch = <15>;
vfront-porch = <2>;
hsync-len = <32>;
vsync-len = <6>;
};
port {
panel1_input: endpoint {
remote-endpoint = <&lvds1_out>;
};
};
};
};
&ldb1_phy {
status = "okay";
};
&ldb1 {
status = "okay";
lvds-channel@0 {
reg = <0>;
fsl,data-mapping = "jeida";
fsl,data-width = <24>;
status = "okay";
primary;
port@1 {
reg = <1>;
lvds0_out: endpoint {
remote-endpoint = <&panel0_input>;
};
};
};
lvds-channel@1 {
reg = <1>;
fsl,data-mapping = "jeida";
fsl,data-width = <24>;
status = "okay";
port@1 {
reg = <1>;
lvds1_out: endpoint {
remote-endpoint = <&panel1_input>;
};
};
};
};
