VisionCB-8M-ADV Selecting display interface
From SomLabs Wiki
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 |
