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Date:   Sun, 22 Apr 2018 15:50:57 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Hans de Goede <hdegoede@...hat.com>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>
Subject: [PATCH 4.16 037/196] ACPI / video: Add quirk to force acpi-video backlight on Samsung 670Z5E

4.16-stable review patch.  If anyone has any objections, please let me know.

------------------

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

commit bbf038618a24d72e2efc19146ef421bb1e1eda1a upstream.

Just like many other Samsung models, the 670Z5E needs to use the acpi-video
backlight interface rather then the native one for backlight control to
work, add a quirk for this.

Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=1557060
Cc: All applicable <stable@...r.kernel.org>
Signed-off-by: Hans de Goede <hdegoede@...hat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/acpi/video_detect.c |    9 +++++++++
 1 file changed, 9 insertions(+)

--- a/drivers/acpi/video_detect.c
+++ b/drivers/acpi/video_detect.c
@@ -220,6 +220,15 @@ static const struct dmi_system_id video_
 		},
 	},
 	{
+	 /* https://bugzilla.redhat.com/show_bug.cgi?id=1557060 */
+	 .callback = video_detect_force_video,
+	 .ident = "SAMSUNG 670Z5E",
+	 .matches = {
+		DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
+		DMI_MATCH(DMI_PRODUCT_NAME, "670Z5E"),
+		},
+	},
+	{
 	 /* https://bugzilla.redhat.com/show_bug.cgi?id=1094948 */
 	 .callback = video_detect_force_video,
 	 .ident = "SAMSUNG 730U3E/740U3E",


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