Hi,
On Thu, Jun 20, 2019 at 11:21 AM Douglas Anderson <dianders@xxxxxxxxxxxx> wrote:
>
> This reverts commit 1f45e8c6d0161f044d679f242fe7514e2625af4a.
>
> This 100 ms mystery delay is not on downstream kernels and no longer
> seems needed on upstream kernels either [1]. Presumably something in the
> meantime has made things better. A few possibilities for patches that
> have landed in the meantime that could have made this better are
> commit 3157694d8c7f ("pwm-backlight: Add support for PWM delays
> proprieties."), commit 5fb5caee92ba ("pwm-backlight: Enable/disable
> the PWM before/after LCD enable toggle."), and commit 6d5922dd0d60
> ("ARM: dts: rockchip: set PWM delay backlight settings for Veyron")
>
> Let's revert and get our 100 ms back.
>
> [1] https://lkml.kernel.org/r/2226970.BAPq4liE1j@diego
>
> Signed-off-by: Douglas Anderson <dianders@xxxxxxxxxxxx>
> ---
>
> 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 deletions(-)
Maybe wait before applying. I've been running reboot tests now with
this patch applied (among others) and with enough reboots I managed to
see:
[ 5.682418] rockchip-dp ff970000.dp: eDP link training failed (-5)
I'll see if I can confirm that it's this patch and why things are
different compared to downstream.
-Doug
