Commit 91a70492c030 for kernel

commit 91a70492c03040d51b36f595530d6491d5d6c541
Author: Zixing Liu <liushuyu@aosc.io>
Date:   Fri Jul 24 16:33:14 2026 +0800

    platform/loongarch: laptop: Explicitly reset bl_powered state when suspend

    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: stable@vger.kernel.org
    Fixes: 53c762b47f72 ("platform/loongarch: laptop: Add backlight power control support")
    Tested-by: Yao Zi <me@ziyao.cc>
    Tested-by: Xi Ruoyao <xry111@xry111.site>
    Signed-off-by: Zixing Liu <liushuyu@aosc.io>
    Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

diff --git a/drivers/platform/loongarch/loongson-laptop.c b/drivers/platform/loongarch/loongson-laptop.c
index f2dcc6d78051..4ec56621db24 100644
--- a/drivers/platform/loongarch/loongson-laptop.c
+++ b/drivers/platform/loongarch/loongson-laptop.c
@@ -186,6 +186,7 @@ static int __init setup_acpi_notify(struct generic_sub_driver *sub_driver)

 static int loongson_hotkey_suspend(struct device *dev)
 {
+	bl_powered = false;
 	return 0;
 }