mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git
synced 2026-10-28 12:53:14 +01:00
Zixing Liu
91a70492c0
On EAECIS NL60R with EC firmware version 1.11, resuming from S3 has a
very high chance (>90%) of causing the EC to lose the previous backlight
power state. When this happens, the laptop resumes normally from S3, but
the backlight remains off (when shining on the screen with a flash light,
we can see the screen contents are updating normally).
Since there is no generic way to query the EC's backlight state on
Loongson laptop platforms, assume the worst-case scenario and restart
the backlight power inside the kernel each time the system resumes.
Cc: [email protected]
Fixes: 53c762b47f ("platform/loongarch: laptop: Add backlight power control support")
Tested-by: Yao Zi <[email protected]>
Tested-by: Xi Ruoyao <[email protected]>
Signed-off-by: Zixing Liu <[email protected]>
Signed-off-by: Huacai Chen <[email protected]>