https://community.nxp.com/t5/i-MX-Processors/IMX8-Plus/m-p/1688164#M209283 <P>Hi,</P><P>When we make a custom design by using IMX8 Plus SOM, Must we add i2c to the GPIO&nbsp; expander(PCA9555)? is that a reason for not working LVSD and MIPI displays? Here is the commands</P><P>"pca953x pca9555@20: Error reading output register<BR />fail to probe panel device ili9881c_panel<BR />fail to get display timings<BR />pca953x pca9555@20: Error reading output register<BR />fail to probe panel device ili9881c_panel<BR />fail to get display timings"</P><P>&nbsp;</P><P>Please help me!&nbsp;</P><P>&nbsp;</P><P>&nbsp;</P> Fri, 14 Jul 2023 06:51:45 GMT SureshPrasad 2023-07-14T06:51:45Z https://community.nxp.com/t5/i-MX-Processors/IMX8-Plus/m-p/1688164#M209283 <P>Hi,</P><P>When we make a custom design by using IMX8 Plus SOM, Must we add i2c to the GPIO&nbsp; expander(PCA9555)? is that a reason for not working LVSD and MIPI displays? Here is the commands</P><P>"pca953x pca9555@20: Error reading output register<BR />fail to probe panel device ili9881c_panel<BR />fail to get display timings<BR />pca953x pca9555@20: Error reading output register<BR />fail to probe panel device ili9881c_panel<BR />fail to get display timings"</P><P>&nbsp;</P><P>Please help me!&nbsp;</P><P>&nbsp;</P><P>&nbsp;</P> Fri, 14 Jul 2023 06:51:45 GMT https://community.nxp.com/t5/i-MX-Processors/IMX8-Plus/m-p/1688164#M209283 SureshPrasad 2023-07-14T06:51:45Z https://community.nxp.com/t5/i-MX-Processors/IMX8-Plus/m-p/1688858#M209361 <P>The display part doesn't need pca9555, you can remove this device node in dts and driver.</P> Thu, 20 Jul 2023 05:01:52 GMT https://community.nxp.com/t5/i-MX-Processors/IMX8-Plus/m-p/1688858#M209361 Zhiming_Liu 2023-07-20T05:01:52Z