From: Hans de Goede hdegoede@redhat.com
[ Upstream commit eb7b0f12e13ba99e64e3a690c2166895ed63b437 ]
The Panasonic Toughbook CF-18 advertises both native and vendor backlight control interfaces. But only the vendor one actually works.
acpi_video_get_backlight_type() will pick the non working native backlight by default, add a quirk to select the working vendor backlight instead.
Signed-off-by: Hans de Goede hdegoede@redhat.com Link: https://patch.msgid.link/20240907124419.21195-1-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 674b9db7a1ef8..c35e96c6c1901 100644 --- a/drivers/acpi/video_detect.c +++ b/drivers/acpi/video_detect.c @@ -254,6 +254,14 @@ static const struct dmi_system_id video_detect_dmi_table[] = { DMI_MATCH(DMI_PRODUCT_NAME, "PCG-FRV35"), }, }, + { + .callback = video_detect_force_vendor, + /* Panasonic Toughbook CF-18 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Matsushita Electric Industrial"), + DMI_MATCH(DMI_PRODUCT_NAME, "CF-18"), + }, + },
/* * Toshiba models with Transflective display, these need to use