there is no DT parameter for selecting the REFCLK Provider..
Does anyone have any experience using REFCLK? How is it defined in the overlay? Given that there is a known issue using the DSI as the source of the clock (CM5 and with higher resolutions), I'd rather avoid any future complications by using the REFCLK.
The acceptable range for REFCLK is pretty wide (25-154 MHz), any good rules of thumb for choosing? I know my display can handle an LVDS clock of 66.3-78.9MHz. Would it be good to set REFCLK to 75MHz (or some factor like 25MHz)?
..
by default IT IS derived from DSI CLK
https://github.com/raspberrypi/linux/bl ... #L395-L402
1. add the parameter and send your changes upstream
2. use a custom driver with all the related additional efforts
Statistics: Posted by aBUGSworstnightmare — Mon Oct 20, 2025 5:25 am