linux-kernel - [PATCH AUTOSEL 6.6 023/139] ACPI: video: Add force_vendor quirk for Panasonic Toughbook CF-18

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Message-ID: <20240925121137.1307574-23-sashal@kernel.org>
Date: Wed, 25 Sep 2024 08:07:23 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Hans de Goede <hdegoede@...hat.com>,
	"Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
	Sasha Levin <sashal@...nel.org>,
	rafael@...nel.org,
	linux-acpi@...r.kernel.org
Subject: [PATCH AUTOSEL 6.6 023/139] ACPI: video: Add force_vendor quirk for Panasonic Toughbook CF-18

From: Hans de Goede <hdegoede@...hat.com>

[ Upstream commit eb7b0f12e13ba99e64e3a690c2166895ed63b437 ]

The Panasonic Toughbook CF-18 advertises both native and vendor backlight
control interfaces. But only the vendor one actually works.

acpi_video_get_backlight_type() will pick the non working native backlight
by default, add a quirk to select the working vendor backlight instead.

Signed-off-by: Hans de Goede <hdegoede@...hat.com>
Link: https://patch.msgid.link/20240907124419.21195-1-hdegoede@redhat.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/acpi/video_detect.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c
index 16ab2d9ef67f3..e96afb1622f95 100644
--- a/drivers/acpi/video_detect.c
+++ b/drivers/acpi/video_detect.c
@@ -260,6 +260,14 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
 		DMI_MATCH(DMI_PRODUCT_NAME, "PCG-FRV35"),
 		},
 	},
+	{
+	 .callback = video_detect_force_vendor,
+	 /* Panasonic Toughbook CF-18 */
+	 .matches = {
+		DMI_MATCH(DMI_SYS_VENDOR, "Matsushita Electric Industrial"),
+		DMI_MATCH(DMI_PRODUCT_NAME, "CF-18"),
+		},
+	},
 
 	/*
 	 * Toshiba models with Transflective display, these need to use
-- 
2.43.0