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From: Hans de Goede <hdegoede@redhat.com>
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Date: Tue, 3 Mar 2015 08:31:24 +0100
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Subject: [PATCH] acpi: video: Add force native backlight quirk for Lenovo
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Ideapad Z570
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The Lenovo Ideapad Z570 (which is an Acer in disguise like some other Ideapads)
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has a broken acpi_video interface, this was fixed in commmit a11d342fb8
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("ACPI / video: force vendor backlight on Lenovo Ideapad Z570").
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Which stops acpi_video from registering a backlight interface, but this is
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only a partial fix, because for people who have the ideapad-laptop module
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installed that module will now register a backlight interface, which also
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does not work, so we need to use the native intel_backlight interface.
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The Lenovo Ideapad 570 is a pre-win8 laptop / too old for the acpi-video code
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to automatically prefer the native backlight interface, so add a quirk for it.
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This commit also removes the previous incomplete fix.
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BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1187004
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Cc: Stepan Bujnak <stepanbujnak@fastmail.fm>
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Signed-off-by: Hans de Goede <hdegoede@redhat.com>
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---
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drivers/acpi/video.c | 17 +++++++++++++++++
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drivers/acpi/video_detect.c | 8 --------
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2 files changed, 17 insertions(+), 8 deletions(-)
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diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
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index 2f1f16df460c..16d744e4552f 100644
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--- a/drivers/acpi/video.c
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+++ b/drivers/acpi/video.c
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@@ -425,6 +425,12 @@ static int __init video_disable_native_backlight(const struct dmi_system_id *d)
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return 0;
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}
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+static int __init video_enable_native_backlight(const struct dmi_system_id *d)
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+{
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+ use_native_backlight_dmi = NATIVE_BACKLIGHT_ON;
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+ return 0;
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+}
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+
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static struct dmi_system_id video_dmi_table[] __initdata = {
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/*
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* Broken _BQC workaround http://bugzilla.kernel.org/show_bug.cgi?id=13121
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@@ -556,6 +562,17 @@ static struct dmi_system_id video_dmi_table[] __initdata = {
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DMI_MATCH(DMI_PRODUCT_NAME, "XPS L521X"),
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},
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},
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+
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+ /* Non win8 machines which need native backlight nevertheless */
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+ {
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+ /* https://bugzilla.redhat.com/show_bug.cgi?id=1187004 */
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+ .callback = video_enable_native_backlight,
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+ .ident = "Lenovo Ideapad Z570",
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+ .matches = {
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+ DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
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+ DMI_MATCH(DMI_PRODUCT_NAME, "102434U"),
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+ },
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+ },
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{}
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};
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diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c
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index 27c43499977a..c42feb2bacd0 100644
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--- a/drivers/acpi/video_detect.c
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+++ b/drivers/acpi/video_detect.c
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@@ -174,14 +174,6 @@ static struct dmi_system_id video_detect_dmi_table[] = {
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DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5737"),
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},
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},
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- {
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- .callback = video_detect_force_vendor,
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- .ident = "Lenovo IdeaPad Z570",
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- .matches = {
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- DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
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- DMI_MATCH(DMI_PRODUCT_VERSION, "Ideapad Z570"),
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- },
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- },
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{ },
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};
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--
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2.1.0
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