linux-kernel - [PATCH AUTOSEL 6.1 18/35] ACPI: video: Add backlight=native DMI quirk for Acer Aspire 4810T

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Message-Id: <20230124134131.637036-18-sashal@kernel.org>
Date:   Tue, 24 Jan 2023 08:41:14 -0500
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 6.1 18/35] ACPI: video: Add backlight=native DMI quirk for Acer Aspire 4810T

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

[ Upstream commit 8ba5fc4c154aeb3b4620f05543cce426c62ed2de ]

The Acer Aspire 4810T predates Windows 8, so it defaults to using
acpi_video# for backlight control, but this is non functional on
this model.

Add a DMI quirk to use the native backlight interface which does
work properly.

Signed-off-by: Hans de Goede <hdegoede@...hat.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 1db8e68cd8bc..79fe66c5f14a 100644
--- a/drivers/acpi/video_detect.c
+++ b/drivers/acpi/video_detect.c
@@ -513,6 +513,14 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
 		DMI_MATCH(DMI_PRODUCT_NAME, "Precision 7510"),
 		},
 	},
+	{
+	 .callback = video_detect_force_native,
+	 /* Acer Aspire 4810T */
+	 .matches = {
+		DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
+		DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 4810T"),
+		},
+	},
 	{
 	 .callback = video_detect_force_native,
 	 /* Acer Aspire 5738z */
-- 
2.39.0