Messages in this thread | | | From | Guillermo Rodriguez Garcia <> | Date | Tue, 30 Aug 2016 10:58:16 +0200 | Subject | Backlight off at boot |
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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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