[PATCH 1/3] ACPI / video: add description for brightness_switch_enabled

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Add description for video module's parameter brightness_switch_enabled
into kernel-parameters.txt.

Signed-off-by: Aaron Lu <aaron.lu@xxxxxxxxx>
---
 Documentation/kernel-parameters.txt | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 2fe6e76..7f64e0f 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -3229,6 +3229,15 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
 	video=		[FB] Frame buffer configuration
 			See Documentation/fb/modedb.txt.
 
+	video.brightness_switch_enabled= [0,1]
+			If set to 1, on receiving an ACPI notify event
+			generated by hotkey, video driver will adjust brightness
+			level and then send out the event to user space through
+			the allocated input device; If set to 0, video driver
+			will only send out the event without touching backlight
+			brightness level.
+			default: 1
+
 	virtio_mmio.device=
 			[VMMIO] Memory mapped virtio (platform) device.
 
-- 
1.8.3.3.gfada522

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