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MIPI-DSI panel and IMX8MQ-EVK

Question asked by Oliver James on May 9, 2019
Latest reply on May 10, 2019 by Oliver James

Hi,

 

I'm currently trying to interface a MIPI display panel to our EVK development board.

 

I've copied the 'dcss-rm67191' device tree contents into our own device tree and  set the various power/reset GPIO pins and removed i2c references etc.

 

There are 2 sets of 'clock-rates' specified in the 'dcss-rm67191' device tree example, I assume one set is for the internal DSI bridge and the other is for the panel? Will these need to be modified? I've not handled custom display devices before.

 

I get this error on boot:

 

[0.966622] imx-drm display-subsystem: bound imx-dcss-crtc.0 (ops dcss_crtc_ops)
[0.974113] nwl_dsi-imx mipi_dsi@30A00000: Using DCSS as input source
[0.980807] imx-drm display-subsystem: failed to bind mipi_dsi@30A00000 (ops imx_nwl_dsi_component_ops): -19
[0.990730] imx-drm display-subsystem: master bind failed: -19

 

Any pointers as to where I'm going wrong would be amazing.

 

Kind regards,
Oli

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