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KAlab.1
Visitor II
August 16, 2020
Question

How do I interface mipi dsi 2-lane with 4-lane displays?

  • August 16, 2020
  • 2 replies
  • 4298 views

I cannot find compatible displays for this processor.

This topic has been closed for replies.

2 replies

AntonioST
ST Employee
August 16, 2020

Usually display panels can be configured for the amount of DSI lanes that would be used.

The number of lanes should be specified as one of the properties in the devicetree.

But check carefully while selecting the display. For example, this one only accepts 3 or 4 as value for the property 'dsi-lanes'

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/devicetree/bindings/display/panel/raydium,rm67191.yaml#n25

Tesla DeLorean
Guru
August 16, 2020

Two lanes a bit design limiting in a world expecting FHD and UHD displays..

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AntonioST
ST Employee
August 16, 2020

The datasheet reports:

> LCD-TFT controller, up to 24-bit // RGB888

> – up to WXGA (1366 × 768) @60 fps

Tesla DeLorean
Guru
August 16, 2020

Configure the display controller..

Two lanes will limit the total resolution, colour depth and refresh rate.

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