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platform/x86: dell-laptop: Fix keyboard max lighting for Dell Latitude E6410 

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@gmail.com>
Reported-by: Gabriel M. Elder <gabriel@tekgnowsys.com>
Link: https://bugzilla.kernel.org/show_bug.cgi?id=196913
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>
This commit is contained in:
Pali Rohár 2017-11-02 21:25:24 +01:00 committed by Darren Hart (VMware)
parent 4fbd8d194f
commit 68a213d325
1 changed files with 17 additions and 0 deletions
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17
drivers/platform/x86/dell-laptop.c
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@ -37,6 +37,7 @@
struct quirk_entry {
u8 touchpad_led;
u8 kbd_led_levels_off_1;
int needs_kbd_timeouts;
/*
@ -67,6 +68,10 @@ static struct quirk_entry quirk_dell_xps13_9333 = {
.kbd_timeouts = { 0, 5, 15, 60, 5 * 60, 15 * 60, -1 },
};
static struct quirk_entry quirk_dell_latitude_e6410 = {
.kbd_led_levels_off_1 = 1,
};
static struct platform_driver platform_driver = {
.driver = {
.name = "dell-laptop",
@ -269,6 +274,15 @@ static const struct dmi_system_id dell_quirks[] __initconst = {
},
.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,
},
{ }
};
@ -1149,6 +1163,9 @@ 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_levels_off_1 && info->levels)
info->levels--;
if (units & BIT(0))
info->seconds = (buffer->output[3] >> 0) & 0xFF;
if (units & BIT(1))