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VisionCB-8M-ADV Selecting display interface

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Revision as of 14:07, 12 May 2025 by KrzysztofChojnowski (talk | contribs) (Created page with "{{PageHeader|VisionCB-8M-ADV Selecting display interface}} During boot, the default u-boot configuration selects one of the three display interfaces available on the board: * DSI * HDMI (through LT8912 converter) * LVDS (through LT8912 converter) The selection is based on the DISP MUX jumper and I2C3_SDA (GPIO5_IO19) pins according to the following table. The DSI display selection is based on the presence of the touchscreen device on I2C1 interface. {| class="wikitabl...")
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VisionCB-8M-ADV Selecting display interface

During boot, the default u-boot configuration selects one of the three display interfaces available on the board:

  • DSI
  • HDMI (through LT8912 converter)
  • LVDS (through LT8912 converter)

The selection is based on the DISP MUX jumper and I2C3_SDA (GPIO5_IO19) pins according to the following table. The DSI display selection is based on the presence of the touchscreen device on I2C1 interface.

DISP MUX I2C3_SDA (GPIO5_IO19) I2C1 device present Selected interface Loaded device tree
DSI N/A 0x41 DSI visionsom-8mm-cb-adv-mipi7-rvt70hsmnwc00.dtb
DSI N/A 0x38 DSI visionsom-8mm-cb-adv-mipi7-ph720128t003.dtb
DSI N/A None or other than 0x41 and 0x38 None visionsom-8mm-cb-adv.dtb
HDMI LOW N/A LVDS visionsom-8mm-cb-adv-lvds-rvt70hslnwc00-b.dtb
HDMI HIGH N/A HDMI visionsom-8mm-cb-adv-hdmi.dtb
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