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From:   Sasha Levin <sashal@kernel.org>
To:     linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc:     Hans de Goede <hdegoede@redhat.com>,
        Ben Greening <bgreening@gmail.com>,
        "Rafael J . Wysocki" <rafael.j.wysocki@intel.com>,
        Sasha Levin <sashal@kernel.org>, rafael@kernel.org,
        linux-acpi@vger.kernel.org
Subject: [PATCH AUTOSEL 5.19 50/58] ACPI: video: Use native backlight on Dell Inspiron N4010
Date:   Sun,  7 Aug 2022 21:31:08 -0400
Message-Id: <20220808013118.313965-50-sashal@kernel.org>
In-Reply-To: <20220808013118.313965-1-sashal@kernel.org>
References: <20220808013118.313965-1-sashal@kernel.org>
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From: Hans de Goede <hdegoede@redhat.com>

[ Upstream commit 03c440a26cba6cfa540d65924e9db86fcea362b2 ]

The Dell Inspiron N4010 does not have ACPI backlight control,
so acpi_video_get_backlight_type()'s heuristics return vendor as
the type to use.

But the vendor interface is broken, where as the native (intel_backlight)
works well, add a quirk to use native.

Link: https://lore.kernel.org/regressions/CALF=6jEe5G8+r1Wo0vvz4GjNQQhdkLT5p8uCHn6ZXhg4nsOWow@mail.gmail.com/
Reported-and-tested-by: Ben Greening <bgreening@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.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 becc198e4c22..4099140bbd5f 100644
--- a/drivers/acpi/video_detect.c
+++ b/drivers/acpi/video_detect.c
@@ -347,6 +347,14 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
 		DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro12,1"),
 		},
 	},
+	{
+	 .callback = video_detect_force_native,
+	 /* Dell Inspiron N4010 */
+	 .matches = {
+		DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+		DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron N4010"),
+		},
+	},
 	{
 	 .callback = video_detect_force_native,
 	 /* Dell Vostro V131 */
-- 
2.35.1