Bug 198823 - "backlight: pwm_bl Check the PWM state" patch switch off and disable Backlight on A13 tablet
Summary: "backlight: pwm_bl Check the PWM state" patch switch off and disable Backlig...
Status: NEW
Alias: None
Product: Drivers
Classification: Unclassified
Component: Video(Other) (show other bugs)
Hardware: ARM Linux
: P1 normal
Assignee: drivers_video-other
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2018-02-19 13:40 UTC by silviop
Modified: 2018-02-22 13:27 UTC (History)
2 users (show)

See Also:
Kernel Version: 4.14.19
Subsystem:
Regression: Yes
Bisected commit-id:

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Description silviop 2018-02-19 13:40:36 UTC 
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/commit/drivers/video/backlight/pwm_bl.c?h=v4.14.20&id=d1b81294575098d989be1f2f6bb628091ceaa87b

The check in patch at link stop back-light working on A13 Allwinner tablet in kernel 4.14 with mainstream dts.

With kernel 4.9 on same hardware  (and main stream dts) all is ok and working.
Comment 1 silviop 2018-02-22 13:27:51 UTC 
If i remove that patch all is working on kernel 4.14.19 too!
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