8MPLUSLPD4-EVK - Yocto Linux 6.6 LVDS

[SanthoshRajavel]

Hi,

I am using the i.MX8M Plus LPDDR4 EVK (8MPLUSLPD4-EVK) and trying to enable an LVDS display using the Innolux G070Y2-L01 panel. I have attached the DTS file I am using. With this configuration, the LVDS interface is enabled successfully, and the clock modes in DRM appear to be correct, but I am not getting any response on the display.

I am using a separate module for backlight control, so I am using the default backlight configuration. However, when I use the imx8mp-evk-jdi-wuxga-lvds-panel.dtb file, the display works and shows the test pattern. Kindly help me identify and fix the issue.

My DTS file.

// SPDX-License-Identifier: GPL-2.0+

/*

 * Copyright 2020 NXP

 */

#include "imx8mp-evk.dts"

/{

panel_lvds: panel-lvds1 {

        compatible  = "panel-lvds";

        backlight = <&lvds_backlight>;

        width-mm = <165>;

        height-mm = <104>;

        data-mapping = "vesa-18";

        status = "okay";

        panel-timing {

              clock-frequency = <29760000>;   /* 29.76 MHz */

              /* Horizontal */

              hactive = <800>;

              hfront-porch = <24>;

              hsync-len = <72>;

              hback-porch = <96>;

              /* Vertical */

              vactive = <480>;

              vfront-porch = <3>;

              vsync-len = <7>;

              vback-porch = <10>;

              /* Polarities */

              #hsync-active = <0>;

              #vsync-active = <0>;

              de-active = <1>;

              #pixelclk-active = <0>;

        };

        port {

            panel1_in: endpoint {

                remote-endpoint = <&lvds1_out>;

            };

        };

    };

};

&hdmi {

    status = "disabled";

};

&lcdif2 {

  status = "okay";

};

/* LVDS1 */

&ldb {

    status = "okay";

    lvds-channel@1 {

        #address-cells = <1>;

#size-cells = <0>;        

        status = "okay";

        primary;

        port@1 {

            reg = <1>;

            lvds1_out: endpoint {

                remote-endpoint = <&panel1_in>;

            };

        };

    };

};

&ldb_phy {

    status = "okay";

};

[Zhiming_Liu · Accepted solution]

Hi @SanthoshRajavel 

The imx8mp-evk-jdi-wuxga-lvds-panel is using lvds-channel@0 , you can try to use this channel.

Best Regards,
Zhiming