Patch "platform/x86: dell-laptop: Fix keyboard max lighting for Dell Latitude E6410" has been added to the 4.9-stable tree

Patch "platform/x86: dell-laptop: Fix keyboard max lighting for Dell Latitude E6410" has been added to the 4.9-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

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

to the 4.9-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     platform-x86-dell-laptop-fix-keyboard-max-lighting-for-dell-latitude-e6410.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Fri Feb 23 11:48:40 CET 2018
From: "Pali Roh�r" <pali.rohar@gmail.com>
Date: Thu, 2 Nov 2017 21:25:24 +0100
Subject: platform/x86: dell-laptop: Fix keyboard max lighting for Dell Latitude E6410

From: "Pali Roh�r" <pali.rohar@gmail.com>


[ Upstream commit 68a213d325c23d39f109f4c7c824b906a7d209de ]

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>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/platform/x86/dell-laptop.c |   17 +++++++++++++++++
 1 file changed, 17 insertions(+)

--- a/drivers/platform/x86/dell-laptop.c
+++ b/drivers/platform/x86/dell-laptop.c
@@ -45,6 +45,7 @@
 
 struct quirk_entry {
 	u8 touchpad_led;
+	u8 kbd_led_levels_off_1;
 
 	int needs_kbd_timeouts;
 	/*
@@ -75,6 +76,10 @@ static struct quirk_entry quirk_dell_xps
 	.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",
@@ -270,6 +275,15 @@ static const struct dmi_system_id dell_q
 		},
 		.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,
+	},
 	{ }
 };
 
@@ -1170,6 +1184,9 @@ static int kbd_get_info(struct kbd_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))


Patches currently in stable-queue which might be from pali.rohar@gmail.com are

queue-4.9/platform-x86-dell-laptop-fix-keyboard-max-lighting-for-dell-latitude-e6410.patch