On Mon 2017-07-17 23:28:11, Enric Balletbo i Serra wrote: > The minnie devices comes with an AUO B101EAN01 panel which is different > from default veyron devices, thus the power on/off timing sequence is > slightly different. The datasheet specifies a pwm delay of 200 ms, so > update the PMW delay proprieties accordingly. Wait a wait a moment! > --- a/arch/arm/boot/dts/rk3288-veyron-minnie.dts > +++ b/arch/arm/boot/dts/rk3288-veyron-minnie.dts > @@ -123,6 +123,8 @@ > 240 241 242 243 244 245 246 247 > 248 249 250 251 252 253 254 255>; > power-supply = <&backlight_regulator>; > + post-pwm-on-delay-us = <20000>; -us = <20 000>; This is not 200 msec. Plus, it is quite anti-social to do udelay(200 000). Plus, it is very anti-socifal to use udelay_range(200msec, 400msec). Whoever told you udelay_range is good thing to use -- it is not, and it is certainly not worth making user wait 200msec more! Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 181 bytes Desc: Digital signature URL: <http://lists.infradead.org/pipermail/linux-rockchip/attachments/20170720/e61cfac2/attachment.sig>
