ARM: dts: rockchip: Remove 0 point from brightness-levels on rk3288-veyron
The extra 0 only adds one point in the userspace visible range,
so this change is almost a noop with the current driver behavior.
We don't need the 0% point, userspace seems to handle this just fine
because it uses the bl_power property to turn off the display.
Furthermore after adding "backlight: pwm_bl: Fix interpolation" patch,
the backlight interpolation will work a little differently. So we need
to preemptively remove the 0-3 segment since otherwise we would have a
252 long interpolation that would slowly go between 0 and 3, looking
really bad in userspace. So it's almost a noop/cleanup now, but it will
be required in the future.
Signed-off-by: Alexandru Stan <amstan@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Acked-by: Daniel Thompson <daniel.thompson@linaro.org>
Link: https://lore.kernel.org/r/20201021220404.v3.1.I96b8d872ec51171f19274e43e96cadc092881271@changeid
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
diff --git a/arch/arm/boot/dts/rk3288-veyron-tiger.dts b/arch/arm/boot/dts/rk3288-veyron-tiger.dts
index 069f0c2c..52a84cb 100644
--- a/arch/arm/boot/dts/rk3288-veyron-tiger.dts
+++ b/arch/arm/boot/dts/rk3288-veyron-tiger.dts
@@ -23,7 +23,7 @@ / {
&backlight {
/* Tiger panel PWM must be >= 1%, so start non-zero brightness at 3 */
- brightness-levels = <0 3 255>;
+ brightness-levels = <3 255>;
num-interpolated-steps = <252>;
};