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authorHans de Goede <hdegoede@redhat.com>2019-12-17 20:08:11 +0100
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2019-12-19 23:01:52 +0100
commitd21a91629f4b8e794fc4c0e0c17c85cedf1d806c (patch)
tree4d6e360a1fb58c3e9dd6219efbc692539a263bbd /drivers/acpi/video_detect.c
parent53870cf03faefa1f0d77fbc366db87d5beda203c (diff)
downloadlinux-d21a91629f4b8e794fc4c0e0c17c85cedf1d806c.tar.bz2
ACPI: video: Do not export a non working backlight interface on MSI MS-7721 boards
Despite our heuristics to not wrongly export a non working ACPI backlight interface on desktop machines, we still end up exporting one on desktops using a motherboard from the MSI MS-7721 series. I've looked at improving the heuristics, but in this case a quirk seems to be the only way to solve this. While at it also add a comment to separate the video_detect_force_none entries in the video_detect_dmi_table from other type of entries, as we already do for the other entry types. Cc: All applicable <stable@vger.kernel.org> BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1783786 Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi/video_detect.c')
-rw-r--r--drivers/acpi/video_detect.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c
index 13ce1bb9facf..419f814d596a 100644
--- a/drivers/acpi/video_detect.c
+++ b/drivers/acpi/video_detect.c
@@ -352,6 +352,11 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
DMI_MATCH(DMI_PRODUCT_NAME, "Precision 7510"),
},
},
+
+ /*
+ * Desktops which falsely report a backlight and which our heuristics
+ * for this do not catch.
+ */
{
.callback = video_detect_force_none,
.ident = "Dell OptiPlex 9020M",
@@ -360,6 +365,14 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 9020M"),
},
},
+ {
+ .callback = video_detect_force_none,
+ .ident = "MSI MS-7721",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "MSI"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "MS-7721"),
+ },
+ },
{ },
};