This machine reports number of keyboard backlight led levels, instead of value of the last led level index. Therefore max_brightness properly needs to be subtracted by 1 to match led max_brightness API. Signed-off-by: Pali Rohár <pali.rohar@xxxxxxxxx> Reported-by: Gabriel M. Elder <gabriel@xxxxxxxxxxxxxx> Link: https://bugzilla.kernel.org/show_bug.cgi?id=196913 --- Changes since v1: * Update kbd_info.levels at initialization time based on quirk --- drivers/platform/x86/dell-laptop.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/drivers/platform/x86/dell-laptop.c b/drivers/platform/x86/dell-laptop.c index f42159f..3f9be8a 100644 --- a/drivers/platform/x86/dell-laptop.c +++ b/drivers/platform/x86/dell-laptop.c @@ -49,6 +49,7 @@ struct quirk_entry { u8 touchpad_led; + u8 kbd_led_num_of_levels_instead_of_last_index; int needs_kbd_timeouts; /* @@ -79,6 +80,10 @@ static int __init dmi_matched(const struct dmi_system_id *dmi) .kbd_timeouts = { 0, 5, 15, 60, 5 * 60, 15 * 60, -1 }, }; +static struct quirk_entry quirk_dell_latitude_e6410 = { + .kbd_led_num_of_levels_instead_of_last_index = 1, +}; + static struct platform_driver platform_driver = { .driver = { .name = "dell-laptop", @@ -280,6 +285,15 @@ static int __init dmi_matched(const struct dmi_system_id *dmi) }, .driver_data = &quirk_dell_xps13_9333, }, + { + .callback = dmi_matched, + .ident = "Dell Latitude E6410", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E6410"), + }, + .driver_data = &quirk_dell_latitude_e6410, + }, { } }; @@ -1200,6 +1214,9 @@ static int kbd_get_info(struct kbd_info *info) units = (buffer->output[2] >> 8) & 0xFF; info->levels = (buffer->output[2] >> 16) & 0xFF; + if (quirks && quirks->kbd_led_num_of_levels_instead_of_last_index && info->levels) + info->levels--; + if (units & BIT(0)) info->seconds = (buffer->output[3] >> 0) & 0xFF; if (units & BIT(1)) -- 1.7.9.5
