Hi David, On Mon, Aug 10, 2026 at 12:24:58PM +0200, David Heidelberg wrote: > On 10/08/2026 11:38, Sakari Ailus wrote: > > Hi David, > > > > On Mon, Aug 03, 2026 at 11:50:25AM +0200, David Heidelberg via B4 Relay > > wrote: > > > From: David Heidelberg <[email protected]> > > > > > > DW9714A is successor of DW9714 and DW9714V is successor of the DW9714A. > > > > > > All actuators are backward compatible, but they do introduce new features, > > > such as Smart Actuator Control (SAC) mode which can minimize the > > > mechanical vibration and achieve very fast mechanical settling time. > > > Support for SAC can be implemented in the future. > > > > What kind of configuration does SAC require? Such things generally aren't > > configured from the userspace, compare e.g. with the dw9719 bindings > > discussion. > > I don't have extra deep insight (except basic how the sensor works). > > By default all dw9714* sensors starts in the default "legacy" mode. > > The clanker after looking at datasheets and kernel struct produced, if it > make sense: > > the mode and the vibration period (SAC_CFG/PRESC/SACT) have to match > the mechanical tVIB of the actuator and lens assembly of the given camera > module, the same way dongwoon,aac-mode/aac-timing/clock-presc do for > dongwoon,dw9768 and dongwoon,sac-mode/vcm-prescale for dongwoon,dw9719. > Those properties are left out until there is driver support and measured > values; note the DW9714V mode set differs from DW9719's, so its enum cannot > be reused as is.
I guess this is fine, but without the configuration there's not much benefit knowing the VCM is actually a bit more sophisticated one. -- Regards, Sakari Ailus
