On Wed, 24 May 2023, Johan Hovold wrote:
> On Mon, May 15, 2023 at 09:26:04AM -0700, Bjorn Andersson wrote:
> > The introduction of high resolution PWM support changed the order of the
> > operations in the calculation of min and max period. The result in both
> > divisions is in most cases a truncation to 0, which limits the period to
> > the range of [0, 0].
> >
> > Both numerators (and denominators) are within 64 bits, so the whole
> > expression can be put directly into the div64_u64, instead of doing it
> > partially.
> >
> > Fixes: b00d2ed37617 ("leds: rgb: leds-qcom-lpg: Add support for high resolution PWM")
> > Reviewed-by: Caleb Connolly <caleb.connolly@xxxxxxxxxx>
> > Tested-by: Steev Klimaszewski <steev@xxxxxxxx>
> > Signed-off-by: Bjorn Andersson <quic_bjorande@xxxxxxxxxxx>
>
> Tested-by: Johan Hovold <johan+linaro@xxxxxxxxxx>
>
> Pavel or Lee, could you pick this one up for 6.4 as it fixes a
> regression (e.g. broken backlight on a number of laptops like the X13s)?
I don't presently have any plans for a -fixes submission.
If anyone else would like to submit it, please be my guest:
Acked-by: Lee Jones <lee@xxxxxxxxxx>
--
Lee Jones [李琼斯]
