Thread (11 messages) 11 messages, 6 authors, 2018-03-28

Re: [PATCH v6 1/5] pwm-backlight: enable/disable the PWM before/after LCD enable toggle.

From: Pavel Machek <hidden>
Date: 2018-03-26 10:42:10
Also in: linux-devicetree, linux-leds, linux-pwm, linux-rockchip, lkml

On Mon 2018-03-26 11:52:09, Enric Balletbo i Serra wrote:
Before this patch the enable signal was set before the PWM signal and
vice-versa on power off. This sequence is wrong, at least, it is on
the different panels datasheets that I checked, so I inverted the sequence
to follow the specs.

For reference the following panels have the mentioned sequence:
  - N133HSE-EA1 (Innolux)
  - N116BGE (Innolux)
  - N156BGE-L21 (Innolux)
  - B101EAN0 (Auo)
  - B101AW03 (Auo)
  - LTN101NT05 (Samsung)
  - CLAA101WA01A (Chunghwa)
Ok, but this changes behaviour for other panels, too. Are you sure you
are not breaking one of those?
								Pavel
								
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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