failed to attach bridge dsi_host to encoder DSI-89: -517

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failed to attach bridge dsi_host to encoder DSI-89: -517

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sean33996
Contributor I

[drm:drm_bridge_attach] *ERROR* failed to attach bridge /bus@56220000/dsi_host@56228000 to encoder DSI-89: -517

i used imx8qxp ,mipi output and a bridge chip sn65dsi86 convert to edp ,get this error

the test mode of sn65dsi86 colorbar IS succeed。but mipi signal not work, i check the log find the error Up. 

How to solve this problem ,Or how to conduct further investigation,Many thanks

DTS is:

&mipi0_dphy {
status = "okay";
};
 
&mipi0_dsi_host {
status = "okay";
 
ports {
/delete-node/ port@1;
 
port@1 {
reg = <1>;
mipi0_dsi_out: endpoint {
remote-endpoint = <&edp_bridge_in>;
};
};
};
 
};
 
&i2c0_mipi_lvds0 {
#address-cells = <1>;
#size-cells = <0>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_touch>;
clock-frequency = <100000>;
status = "okay";
 
 
edp_bridge: bridge@2c {
compatible = "ti,sn65dsi86";
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_edp_bridge>;
reg = <0x2c>;
enable-gpios = <&lsio_gpio3 16U GPIO_ACTIVE_HIGH>;
oe-gpios = <&lsio_gpio1 13U GPIO_ACTIVE_HIGH>;
reset-gpios = <&lsio_gpio1 27U GPIO_ACTIVE_HIGH>;
/*
vccio-supply = <&reg_main_1v8>;
vpll-supply = <&reg_main_1v8>;
vcca-supply = <&reg_main_1v2>;
vcc-supply = <&reg_main_1v2>;*/
 
clocks = <&sn65dsi86_refclk>;
clock-names = "refclk";
 
no-hpd;
 
ports {
#address-cells = <1>;
#size-cells = <0>;
 
port@0 {
reg = <0>;
 
edp_bridge_in: endpoint {
remote-endpoint = <&mipi0_dsi_out>;
};
};
 
port@1 {
reg = <1>;
 
edp_bridge_out: endpoint {
data-lanes = 2 1 0>;
              lane-polarities = <1 1 1 1>;
remote-endpoint = <&panel_in>;
};
};
};
};
 
/delete-node/ lvds-to-hdmi-bridge@4c;
};

 

 

panel {
compatible = "truly,local-dimming";
no-hpd;
 
port {
panel_in: endpoint {
remote-endpoint = <&edp_bridge_out>;
};
};
};
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642 Views
Zhiming_Liu
NXP TechSupport
NXP TechSupport

Hi @sean33996 

Have you tried to modify the sn65dsi86 driver?Try to  move xxx_mipi_dsi_host_attach to xxxx_bridge_attach.

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635 Views
sean33996
Contributor I

i get the DSI signal by oscilloscope

and the sn65dsi86 color bar is succes on the screen

but the dsi signal can not on the screen

Could you give me some advice

[图片][图片][图片][图片][图片]

8aa33b56f5bffb03bec9d1ea87ecf72.jpg

 [图片][图片]

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630 Views
Zhiming_Liu
NXP TechSupport
NXP TechSupport

1.Check dts setting with your hardware design again

2.You can use i2ctool to dump sn65dsi86 registers and check if there is any error flags.

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599 Views
sean33996
Contributor I

thank you very much , it works

sean33996_0-1717738831032.png

 

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331 Views
jongjin
Contributor I

Could you tell me more details, where you modified?

 

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