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authorHans de Goede <hdegoede@redhat.com>2019-01-07 17:08:21 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-04-05 22:29:15 +0200
commitbaf50485819036fdea6b2e7d21a46d9214484bfb (patch)
tree2e749db16c24adaca16cd9cb1bad96dd6e0f465a
parentf139c2558462c04202084c2188bfd81b35b775e3 (diff)
ACPI / video: Extend chassis-type detection with a "Lunch Box" check
[ Upstream commit d693c008e3ca04db5916ff72e68ce661888a913b ] Commit 53fa1f6e8a59 ("ACPI / video: Only default only_lcd to true on Win8-ready _desktops_") introduced chassis type detection, limiting the lcd_only check for the backlight to devices where the chassis-type indicates their is no builtin LCD panel. The purpose of the lcd_only check is to avoid advertising a backlight interface on desktops, since skylake and newer machines seem to always have a backlight interface even if there is no LCD panel. The limiting of this check to desktops only was done to avoid breaking backlight support on some laptops which do not have the lcd flag set. The Fujitsu ESPRIMO Q910 which is a compact (NUC like) desktop machine has a chassis type of 0x10 aka "Lunch Box". Without the lcd_only check we end up falsely advertising backlight/brightness control on this device. This commit extend the dmi_is_desktop check to return true for type 0x10 to fix this. Fixes: 53fa1f6e8a59 ("ACPI / video: Only default only_lcd to true ...") 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>
-rw-r--r--drivers/acpi/acpi_video.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/acpi/acpi_video.c b/drivers/acpi/acpi_video.c
index d79e38abd6d9..ea0573176894 100644
--- a/drivers/acpi/acpi_video.c
+++ b/drivers/acpi/acpi_video.c
@@ -2088,6 +2088,7 @@ static bool dmi_is_desktop(void)
case 0x05: /* Pizza Box */
case 0x06: /* Mini Tower */
case 0x07: /* Tower */
+ case 0x10: /* Lunch Box */
case 0x11: /* Main Server Chassis */
return true;
}