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Based on the context provided, here are the key points regarding the validation of the vdd, vccio, and backlight entries in the JD9365DA panel DTS file:
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Power Supply Configuration:
- Both
vdd-supplyandvccio-supplyare set to<&buck5_reg>. This is a common configuration, but it is crucial to ensure that thebuck5_regregulator can supply the necessary voltages for both functions. If the regulator is not functioning correctly, it could lead to the panel being blank and failing to attach to the MIPI DSI bus.
- Both
-
Backlight Configuration:
- The backlight entry is currently commented out in the DTS file. Uncommenting the backlight entry is necessary to ensure that the backlight is activated. Without the backlight, the panel will not illuminate, leading to a blank display.
-
Boot Log Errors:
- The boot log indicates errors related to the MIPI DSI bridge attachment, specifically stating ‘ERROR failed to attach bridge’. This suggests potential issues with the panel’s configuration or compatibility with the MIPI DSI interface, which could be related to the power supply entries or the backlight configuration.
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Recommendations:
- Enable Backlight: Uncomment the backlight entry in the DTS file to ensure that the backlight is activated.
- Verify Power Supply: Check the voltage levels provided by the
buck5_regregulator to ensure they meet the requirements of the JD9365DA panel. - Review DTS Configuration: Ensure that all entries in the DTS file are correctly configured and that the panel is compatible with the MIPI DSI interface settings.
In conclusion, the current configuration of the JD9365DA panel’s DTS file requires validation of the VDD and VCCIO entries, as well as enabling the backlight to resolve the blank display issue. Addressing these points should facilitate proper initialization and functionality of the panel.
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