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ACPI / video: Add quirks for the Dell Vostro V131

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The Dell Vostro V131 has an especially broken acpi-video implementation.

The backlight control bits work, but when the brightness is changed via
the acpi-video interface the backlight flickers annoyingly before settling
at the new brightness, switching to using the native interface fixes the
flickering so add a quirk for this (the vendor interface has the same
problem).

Brightness keypresses reported through the acpi-video-bus are also broken,
they get reported one event delayed, so if you press the brightness-up
hotkey on the keyboard nothing happens, then if you press brightness-down,
the previous brightness-up event gets reported. Since the keypresses are
also reported via wmi (if active) and via atkbd (when wmi is not active)
add a quirk to simply filter out the delayed (broken) events.

Reported-and-tested-by: Michał Kępień <kernel@kempniu.pl>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Hans de Goede 2015-12-22 19:09:52 +01:00 committed by Rafael J. Wysocki
parent 05bc59a079
commit 4b4b3b20e8
2 changed files with 33 additions and 0 deletions
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25
drivers/acpi/acpi_video.c
View File

@ -419,6 +419,13 @@ static int video_enable_only_lcd(const struct dmi_system_id *d)
return 0;
}
static int video_set_report_key_events(const struct dmi_system_id *id)
{
if (report_key_events == -1)
report_key_events = (uintptr_t)id->driver_data;
return 0;
}
static struct dmi_system_id video_dmi_table[] = {
/*
* Broken _BQC workaround http://bugzilla.kernel.org/show_bug.cgi?id=13121
@ -507,6 +514,24 @@ static struct dmi_system_id video_dmi_table[] = {
DMI_MATCH(DMI_PRODUCT_NAME, "ESPRIMO Mobile M9410"),
},
},
/*
* Some machines report wrong key events on the acpi-bus, suppress
* key event reporting on these. Note this is only intended to work
* around events which are plain wrong. In some cases we get double
* events, in this case acpi-video is considered the canonical source
* and the events from the other source should be filtered. E.g.
* by calling acpi_video_handles_brightness_key_presses() from the
* vendor acpi/wmi driver or by using /lib/udev/hwdb.d/60-keyboard.hwdb
*/
{
.callback = video_set_report_key_events,
.driver_data = (void *)((uintptr_t)REPORT_OUTPUT_KEY_EVENTS),
.ident = "Dell Vostro V131",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V131"),
},
},
{}
};

8
drivers/acpi/video_detect.c
View File

@ -279,6 +279,14 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro12,1"),
},
},
{
.callback = video_detect_force_native,
.ident = "Dell Vostro V131",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V131"),
},
},
{ },
};