Re: [PATCH] arm64: dts: qcom: sc8280xp: use refgen regulator for DSI

[Dmitry Baryshkov]

On Sat, Feb 28, 2026 at 09:38:43PM +0800, Pengyu Luo wrote:
> On Sat, Feb 28, 2026 at 9:13 PM Dmitry Baryshkov
> <dmitry.baryshkov@xxxxxxxxxxxxxxxx> wrote:
> >
> > On Sat, Feb 28, 2026 at 08:54:30PM +0800, Pengyu Luo wrote:
> > > Use it for the DSI controllers, since DSI nodes have been added.
> > >
> > > Signed-off-by: Pengyu Luo <mitltlatltl@xxxxxxxxx>
> > > ---
> > > This patch depends on the below series:
> > > https://lore.kernel.org/linux-arm-msm/20260228101907.18043-1-mitltlatltl@xxxxxxxxx/
> >
> > Why was it not squashed into that series? I'd assume that DSI nodes are
> > incomplete and are working "by luck" without the refgen supplies.
> >
> 
> I had completely forgotten about it until I found the patch when I was
> sorting these old day unverified patches. At that time, I just sent
> DSI patches. I will put it into DSI patches.
> 
> Many platforms should work without refgen. Bootloder may have
> initialized it and be untouched later? Once there was no refgen
> regulator, my sdm845 phone worked.

If there is no refgen driver, then the bootloader setup will continue to
work since nobody touches it. If there is a refgen driver, then the
kernel will shut it off during the bootup procedure.

-- 
With best wishes
Dmitry