* Backlight off at boot
@ 2016-08-30 8:58 Guillermo Rodriguez Garcia
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From: Guillermo Rodriguez Garcia @ 2016-08-30 8:58 UTC (permalink / raw)
To: Thierry Reding, linux-kernel
Hello all,
I have been experiencing an issue with a SAMA5D3 Xplained board where
the attached LCD panel would boot up completely white until an
application that uses DRM is actually started.
After some investigation I found that this happens because by default,
backlight devices are immediately enabled when registered.
A solution involving a new "backlight-boot-off" DT property was
discussed some time ago [1], but was never merged. I think this would
be useful in general; see for example [2]. I know there is a concern
that configuration should not be part of the device tree, but this is
not much different from the "default-brightness-level" property, and
no other solutions have been proposed.
Are there any plans to implement something like this?
[1]: https://lkml.org/lkml/2014/7/31/259
[2]: https://groups.google.com/a/chromium.org/forum/#!topic/chromium-os-reviews/NaicvV6KQUs
--
Guillermo Rodriguez Garcia
guille.rodriguez@gmail.com
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