Patch "Input: elantech - don't set bit 1 of reg_10 when the no_hw_res quirk is set" has been added to the 3.14-stable tree

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

    Input: elantech - don't set bit 1 of reg_10 when the no_hw_res quirk is set

to the 3.14-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:
     input-elantech-don-t-set-bit-1-of-reg_10-when-the-no_hw_res-quirk-is-set.patch
and it can be found in the queue-3.14 subdirectory.

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


>From fb4f8f568a9def02240ef9bf7aabd246dc63a081 Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@xxxxxxxxxx>
Date: Sat, 7 Jun 2014 23:07:13 -0700
Subject: Input: elantech - don't set bit 1 of reg_10 when the no_hw_res quirk is set

From: Hans de Goede <hdegoede@xxxxxxxxxx>

commit fb4f8f568a9def02240ef9bf7aabd246dc63a081 upstream.

The touchpad on the GIGABYTE U2442 not only stops communicating when we try
to set bit 3 (enable real hardware resolution) of reg_10, but on some BIOS
versions also when we set bit 1 (enable two finger mode auto correct).

I've asked the original reporter of:
https://bugzilla.kernel.org/show_bug.cgi?id=61151

To check that not setting bit 1 does not lead to any adverse effects on his
model / BIOS revision, and it does not, so this commit fixes the touchpad
not working on these versions by simply never setting bit 1 for laptop
models with the no_hw_res quirk.

Reported-and-tested-by: James Lademann <jwlademann@xxxxxxxxx>
Tested-by: Philipp Wolfer <ph.wolfer@xxxxxxxxx>
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/input/mouse/elantech.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

--- a/drivers/input/mouse/elantech.c
+++ b/drivers/input/mouse/elantech.c
@@ -849,7 +849,7 @@ static int elantech_set_absolute_mode(st
 		if (etd->set_hw_resolution)
 			etd->reg_10 = 0x0b;
 		else
-			etd->reg_10 = 0x03;
+			etd->reg_10 = 0x01;
 
 		if (elantech_write_reg(psmouse, 0x10, etd->reg_10))
 			rc = -1;
@@ -1350,7 +1350,8 @@ static int elantech_reconnect(struct psm
 }
 
 /*
- * Some hw_version 3 models go into error state when we try to set bit 3 of r10
+ * Some hw_version 3 models go into error state when we try to set
+ * bit 3 and/or bit 1 of r10.
  */
 static const struct dmi_system_id no_hw_res_dmi_table[] = {
 #if defined(CONFIG_DMI) && defined(CONFIG_X86)


Patches currently in stable-queue which might be from hdegoede@xxxxxxxxxx are

queue-3.14/input-elantech-don-t-set-bit-1-of-reg_10-when-the-no_hw_res-quirk-is-set.patch
queue-3.14/input-elantech-deal-with-clickpads-reporting-right-button-events.patch
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