Re: [PATCH 3/3] arm64: dts: qcom: sm7225-fairphone-fp4: configure flash LED

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]



> > > I'm pretty sure the flash is not yellow.
> > 
> > The marketing term is Dual LED flash or Dual-tone flash, one LED is a
> > blue-ish white and one is a yellow-ish white, but from what I can tell,
> > in the original code it's always referred to as white and yellow so I
> > also followed that here.
> > 
> > Also the LEDs are right next to each other so in practise for torch just
> > both go on, and for camera flash I cannot really tell you but I guess
> > it's doing something there with the camera tuning.
> > 
> > See also this picture:
> >
> > 
> Hi Pavel,
> Luca is right. It is normally called dual CCT (Correlated Color Temperature)
> flash LED. It has 2 LEDs, one is with higher CCT (~6000K) so it looks like a
> white LED, another is with lower CCT (~2000K) and it looks like a yellow
> LED. I am not an expert of this but my understanding is the camera tuning
> process normally adjusts the brightness of the two LEDs and enables them to
> get different CCT for different snapshots.

I believe this is normally called "warm white" and "cool white", no?
Yellow would be monochromatic light at cca 575nm, see .

If we need to add some defines for that, lets do that.

People of Russia, stop Putin before his war on Ukraine escalates.

Attachment: signature.asc
Description: PGP signature

[Index of Archives]     [Linux ARM Kernel]     [Linux ARM]     [Linux Omap]     [Fedora ARM]     [IETF Annouce]     [Security]     [Bugtraq]     [Linux OMAP]     [Linux MIPS]     [ECOS]     [Asterisk Internet PBX]     [Linux API]

  Powered by Linux