[PATCH AUTOSEL 6.4 05/13] ACPI: video: Add backlight=native DMI quirk for Lenovo Ideapad Z470

Sasha Levin
2023-09-08T18:02:04Z

From: "Jiri Slaby (SUSE)" <jirislaby@kernel.org>

[ 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@kernel.org>
Reviewed-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 | 9 +++++++++
1 file changed, 9 insertions(+)

diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c
index e7d04ab864a16..922a31857397c 100644
--- a/drivers/acpi/video_detect.c
+++ b/drivers/acpi/video_detect.c
@@ -445,6 +445,15 @@ 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,
--
2.40.1