diff options
| author | Hans de Goede <hdegoede@redhat.com> | 2014-06-07 23:07:13 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-07-06 18:57:26 -0700 |
| commit | 946eed3789c6947f8eda506679837c24be579a3c (patch) | |
| tree | 7f224a36d572d9936167b3070f1425cd10b1abc8 /drivers/input | |
| parent | a75a3c00c3cb77541bf83e4f7c09fd630093976f (diff) | |
Input: elantech - don't set bit 1 of reg_10 when the no_hw_res quirk is set
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@gmail.com>
Tested-by: Philipp Wolfer <ph.wolfer@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/input')
| -rw-r--r-- | drivers/input/mouse/elantech.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/input/mouse/elantech.c b/drivers/input/mouse/elantech.c index 360e46b200de..233516aff595 100644 --- a/drivers/input/mouse/elantech.c +++ b/drivers/input/mouse/elantech.c @@ -849,7 +849,7 @@ static int elantech_set_absolute_mode(struct psmouse *psmouse) 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 psmouse *psmouse) } /* - * 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) |