Patch "ACPI: video: Add backlight=native DMI quirk for Lenovo Ideapad Z470" has been added to the 4.19-stable tree

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This is a note to let you know that I've just added the patch titled

    ACPI: video: Add backlight=native DMI quirk for Lenovo Ideapad Z470

to the 4.19-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     acpi-video-add-backlight-native-dmi-quirk-for-lenovo.patch
and it can be found in the queue-4.19 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 8fa7eefcf4ba97402dff41db1933b4382448ecf6
Author: Jiri Slaby (SUSE) <jirislaby@xxxxxxxxxx>
Date:   Tue Apr 18 08:42:00 2023 +0200

    ACPI: video: Add backlight=native DMI quirk for Lenovo Ideapad Z470
    
    [ Upstream commit 96b709be183c56293933ef45b8b75f8af268c6de ]
    
    The Lenovo Ideapad Z470 predates Windows 8, so it defaults to using
    acpi_video for backlight control. But this is not functional on this
    model.
    
    Add a DMI quirk to use the native backlight interface which works.
    
    Link: https://bugzilla.suse.com/show_bug.cgi?id=1208724
    Signed-off-by: Jiri Slaby (SUSE) <jirislaby@xxxxxxxxxx>
    Reviewed-by: Hans de Goede <hdegoede@xxxxxxxxxx>
    Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c
index b4f16073ef432..866bc20c82397 100644
--- a/drivers/acpi/video_detect.c
+++ b/drivers/acpi/video_detect.c
@@ -294,6 +294,15 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
 		DMI_MATCH(DMI_BOARD_NAME, "Lenovo IdeaPad S405"),
 		},
 	},
+	{
+	 /* https://bugzilla.suse.com/show_bug.cgi?id=1208724 */
+	 .callback = video_detect_force_native,
+	 /* Lenovo Ideapad Z470 */
+	 .matches = {
+		DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+		DMI_MATCH(DMI_PRODUCT_VERSION, "IdeaPad Z470"),
+		},
+	},
 	{
 	 /* https://bugzilla.redhat.com/show_bug.cgi?id=1187004 */
 	 .callback = video_detect_force_native,



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