After reading a lot of different pages and posts i was unable to find the final answer for my question. Could someone help me please with any advice or useful info (what is wrong)?
We are using custom imx8mp board with lcd panel auo t215hvn01 directly connected to the lvds outputs of the imx chip. After we started using linux kernel lf-6.6.y we got shifted image on the lvds output. If we use previous kernel lf-5.15-y with the same images - the images are shown correctly. The device trees are the same.The changes in panel or display timings have no effect.
What is wrong/missing/should be added/patched/additionally configured into/with the 6.6 kernel?
We use image from yocto bsp 6.6.3, MACHINE is imx8mp-lp4ddr-evk DISTRO is fsl-imx-xwayland.
The wayland desktop image shifted also, so it is not looks like fthe ramebuffer issue, something wrong or unconfigured with lcdif or lvds settings. If we tried to get image from framebuffer (with disabled weston, with fb2png utility) the image looks properly alignet. What we should tune more?
Device tree parts for panel are:
panel-lvds0 {
compatible = "auo,t215hvn01";
backlight = <&lvds_backlight>;
power-supply = <®_lvds>;
enable-gpios = <&gpio3 19 GPIO_ACTIVE_HIGH>;
width-mm = <476>;
height-mm = <268>;
data-mapping = "vesa-24";
panel-timing {
clock-frequency = <144000000>;
hactive = <1920>;
vactive = <1080>;
hfront-porch = <40>;
hback-porch = <40>;
hsync-len = <10>;
vback-porch = <20>;
vfront-porch = <20>;
vsync-len = <10>;
}; port {
panel_in_lvds0: endpoint {
remote-endpoint = <&lvds0_out>;
};
};
};
&ldb {
fsl,dual-channel;
status = "okay";
lvds0: lvds-channel@0 {
fsl,data-mapping = "spwg";
fsl,data-width = <24>;
status = "okay";
display-timings {
native-mode = <&timing0>;
timing0: timing0 {
clock-frequency = <144000000>;
hactive = <1920>;
vactive = <1080>;
hfront-porch = <40>;
hback-porch = <40>;
hsync-len = <10>;
vback-porch = <20>;
vfront-porch = <20>;
vsync-len = <10>;
};
};
port@1 {
reg = <1>;
lvds0_out: endpoint {
remote-endpoint = <&panel_in_lvds0>;
};
};
};
};
