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platform/x86: dell-laptop: disable kbd backlight on Inspiron 10xx 

This patch adds a quirk disabling keyboard backlight support for the
Dell Inspiron 1012 and 1018.

Those models wrongly report supporting keyboard backlight control
features (through SMBIOS tokens) even though they're not equipped with
a backlit keyboard. This led to broken controls being exposed
through sysfs by this driver which froze the system when used.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=107651
Signed-off-by: Pacien TRAN-GIRARD <pacien.trangirard@pacien.net>
Reviewed-by: Mario Limonciello <mario.limonciello@dell.com>
Reviewed-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
This commit is contained in:
Pacien TRAN-GIRARD 2019-09-27 23:19:03 +02:00 committed by Andy Shevchenko
parent 94930d0133
commit 10b65e2915
1 changed files with 26 additions and 0 deletions
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26
drivers/platform/x86/dell-laptop.c
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@ -33,6 +33,7 @@
struct quirk_entry { struct quirk_entry {
bool touchpad_led; bool touchpad_led;
bool kbd_led_not_present;
bool kbd_led_levels_off_1; bool kbd_led_levels_off_1;
bool kbd_missing_ac_tag; bool kbd_missing_ac_tag;
@ -73,6 +74,10 @@ static struct quirk_entry quirk_dell_latitude_e6410 = {
.kbd_led_levels_off_1 = true, .kbd_led_levels_off_1 = true,
}; };
static struct quirk_entry quirk_dell_inspiron_1012 = {
.kbd_led_not_present = true,
};
static struct platform_driver platform_driver = { static struct platform_driver platform_driver = {
.driver = { .driver = {
.name = "dell-laptop", .name = "dell-laptop",
@ -310,6 +315,24 @@ static const struct dmi_system_id dell_quirks[] __initconst = {
}, },
.driver_data = &quirk_dell_latitude_e6410, .driver_data = &quirk_dell_latitude_e6410,
}, },
{
.callback = dmi_matched,
.ident = "Dell Inspiron 1012",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1012"),
},
.driver_data = &quirk_dell_inspiron_1012,
},
{
.callback = dmi_matched,
.ident = "Dell Inspiron 1018",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1018"),
},
.driver_data = &quirk_dell_inspiron_1012,
},
{ } { }
}; };
@ -1493,6 +1516,9 @@ static void kbd_init(void)
{ {
int ret; int ret;
if (quirks && quirks->kbd_led_not_present)
return;
ret = kbd_init_info(); ret = kbd_init_info();
kbd_init_tokens(); kbd_init_tokens();