Hi, On Wed, Fri, 18 Mar 2016 Heiko Stuebner <heiko@xxxxxxxxx> wrote: > > The panels need a bit of time to actually turn on. If this isn't > observed, this results in problems when trying talk to the panels > and thus produces detection errors. 100ms seem to be a safe value > for the time being. > > Signed-off-by: Heiko Stuebner <heiko@xxxxxxxxx> > --- > arch/arm/boot/dts/rk3288-veyron-jaq.dts | 1 + > arch/arm/boot/dts/rk3288-veyron-jerry.dts | 1 + > arch/arm/boot/dts/rk3288-veyron-minnie.dts | 1 + > arch/arm/boot/dts/rk3288-veyron-speedy.dts | 1 + > 4 files changed, 4 insertions(+) I know it was 3 years ago, but any idea how to reproduce the problems you were seeing without this patch? I believe the downstream kernel never had any delay like this and I'm not aware of any issues. I wonder if the need for this extra 100 ms delay is no longer there now that we have: 3157694d8c7f pwm-backlight: Add support for PWM delays proprieties. 5fb5caee92ba pwm-backlight: Enable/disable the PWM before/after LCD enable toggle. 6d5922dd0d60 ARM: dts: rockchip: set PWM delay backlight settings for Veyron _______________________________________________ Linux-rockchip mailing list Linux-rockchip@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/linux-rockchip
