linux-kernel - [PATCH] acpi/video: Add quirk for the Colorful X15 AT 23 Laptop

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Date:   Sun, 26 Nov 2023 21:59:13 +0800
From:   Yuluo Qiu <qyl27@...look.com>
To:     "Rafael J. Wysocki" <rafael@...nel.org>,
        Len Brown <lenb@...nel.org>
Cc:     linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
        Yuluo Qiu <qyl27@...look.com>,
        Celeste Liu <CoelacanthusHex@...il.com>
Subject: [PATCH] acpi/video: Add quirk for the Colorful X15 AT 23 Laptop

The Colorful X15 AT 23 ACIP video-bus device report spurious
ACPI_VIDEO_NOTIFY_CYCLE events resulting in spurious KEY_SWITCHVIDEOMODE
events being reported to userspace (and causing trouble there) when
an external screen plugged in.

Add a quirk setting the report_key_events mask to
REPORT_BRIGHTNESS_KEY_EVENTS so that the ACPI_VIDEO_NOTIFY_CYCLE
events will be ignored, while still reporting brightness up/down
hotkey-presses to userspace normally.

Signed-off-by: Yuluo Qiu <qyl27@...look.com>
Co-developed-by: Celeste Liu <CoelacanthusHex@...il.com>
Signed-off-by: Celeste Liu <CoelacanthusHex@...il.com>
---
 drivers/acpi/acpi_video.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/acpi/acpi_video.c b/drivers/acpi/acpi_video.c
index d321ca7160d9..c54a364ffff3 100644
--- a/drivers/acpi/acpi_video.c
+++ b/drivers/acpi/acpi_video.c
@@ -503,6 +503,15 @@ static const struct dmi_system_id video_dmi_table[] = {
 		DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3350"),
 		},
 	},
+	{
+	 .callback = video_set_report_key_events,
+	 .driver_data = (void *)((uintptr_t)REPORT_BRIGHTNESS_KEY_EVENTS),
+	 .ident = "COLORFUL X15 AT 23",
+	 .matches = {
+		DMI_MATCH(DMI_SYS_VENDOR, "COLORFUL"),
+		DMI_MATCH(DMI_PRODUCT_NAME, "X15 AT 23"),
+		},
+	},
 	/*
 	 * Some machines change the brightness themselves when a brightness
 	 * hotkey gets pressed, despite us telling them not to. In this case
-- 
2.43.0