IMX8M MINI EVK LVDS CONFIGURATION

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IMX8M MINI EVK LVDS CONFIGURATION

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VinithNama
Contributor III

Hi ,

   I am currently working on IMX8M MINI EVK on linux environment, I need to connect the MIPI-HDMI to MIPI-LVDS for that i have disabled the MIPI-HDMI in imx8mm-evk.dts file and added the MIPI-LVDS structure in the same dts file. I am communication to the LVDS using SN65DSI83 chip for converting the MIPI data into LVDS. I have modified the device tree as 

&i2c3 {
clock-frequency = <100000>;
pinctrl-names = "default", "gpio";
pinctrl-0 = <&pinctrl_i2c3>;
pinctrl-1 = <&pinctrl_i2c3_gpio>;
scl-gpios = <&gpio5 18 GPIO_ACTIVE_HIGH>;
sda-gpios = <&gpio5 19 GPIO_ACTIVE_HIGH>;
status = "okay";

dsi_lvds_bridge: sn65dsi84@2c {
compatible = "ti,sn65dsi83";
reg = <0x2c>;
ti,dsi-lanes = <4>;
ti,lvds-format = <1>;
ti,lvds-bpp = <24>;
ti,width-mm = <217>;
ti,height-mm = <136>;
enable-gpios = <&gpio3 0 GPIO_ACTIVE_HIGH>;
interrupt-parent = <&gpio3>;
interrupts = <6 IRQ_TYPE_LEVEL_HIGH>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_lvds>;
status = "disabled";

display-timings {
native-mode = <&lvds0_g101evn010>;

/* AUO G101EVN01.0 */
lvds0_g101evn010: timing@0 {
clock-frequency = <69000000>;
hactive = <1280>;
vactive = <800>;
hfront-porch = <120>;
hback-porch = <1>;
hsync-len = <8>;
vback-porch = <10>;
vfront-porch = <1>;
vsync-len = <6>;
hsync-active = <1>;
vsync-active = <1>;
de-active = <1>;
pixelclk-active = <0>;
};

/* Fusion 10" F10A-0102 */
lvds0_hsd101pfw2: timing@1 {
clock-frequency = <45000000>;
hactive = <1024>;
vactive = <600>;
hfront-porch = <120>;
hback-porch = <1>;
hsync-len = <8>;
vback-porch = <10>;
vfront-porch = <1>;
vsync-len = <6>;
hsync-active = <1>;
vsync-active = <1>;
de-active = <1>;
pixelclk-active = <0>;
};
};

port {
dsi_lvds_bridge_in: endpoint {
remote-endpoint = <&mipi_dsi_lvds_out>;
};
};
};

 

&mipi_dsi {
status = "okay";

...

port@2 {
mipi_dsi_lvds_out: endpoint {
remote-endpoint = <&dsi_lvds_bridge_in>;
};
};
};

 and in iomuxc 

pinctrl_lvds: lvdsgrp {
fsl,pins = <
/* SN65DSI83 enable */
MX8MN_IOMUXC_NAND_ALE_GPIO3_IO0 0x19
/* SN65DSI83 interrupt */
MX8MN_IOMUXC_NAND_DATA00_GPIO3_IO6 0x19
>;
};

when i added like this I'm getting the u-boot log as

wait_for_sr_state: failed sr=81 cr=a0 state=2020
i2c_init_transfer: failed for chip 0x52 retry=0
wait_for_sr_state: failed sr=81 cr=a0 state=2020
i2c_init_transfer: failed for chip 0x52 retry=1
wait_for_sr_state: failed sr=81 cr=a0 state=2020
i2c_init_transfer: failed for chip 0x52 retry=2
i2c_init_transfer: give up i2c_regs=0x30a30000
tcpc_init: Can't find device id=0x52
setup_typec: tcpc port2 init failed, err=-19
wait_for_sr_state: failed sr=81 cr=a0 state=2020
i2c_init_transfer: failed for chip 0x50 retry=0
wait_for_sr_state: failed sr=81 cr=a0 state=2020
i2c_init_transfer: failed for chip 0x50 retry=1
wait_for_sr_state: failed sr=81 cr=a0 state=2020
i2c_init_transfer: failed for chip 0x50 retry=2
i2c_init_transfer: give up i2c_regs=0x30a30000
tcpc_init: Can't find device id=0x50

 

can you please help me where I'm making mistake.

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