diff options
| author | KT Liao <kt.liao@emc.com.tw> | 2016-12-12 11:03:42 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-04-13 19:47:55 +0200 |
| commit | e0709814a17f0eeed84fa593f7a3057aa38cba56 (patch) | |
| tree | 49d8b9ec9a0883087e1ad1c80818b8f7e55e6787 /drivers/input/mouse/elantech.c | |
| parent | 97e885c7d1c806ec9d602644cb9c6eee094b25a1 (diff) | |
Input: elantech - force relative mode on a certain module
[ Upstream commit d899520b0431e70279bfb5066ecb6dc91d0b7072 ]
One of Elan modules with sample version is 0x74 and hw_version is 0x03 has
a bug in absolute mode implementation, so let it run in default PS/2
relative mode.
Signed-off-by: KT Liao <kt.liao@emc.com.tw>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/input/mouse/elantech.c')
| -rw-r--r-- | drivers/input/mouse/elantech.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/input/mouse/elantech.c b/drivers/input/mouse/elantech.c index 59603a5728f7..c519c0b09568 100644 --- a/drivers/input/mouse/elantech.c +++ b/drivers/input/mouse/elantech.c @@ -1711,6 +1711,17 @@ int elantech_init(struct psmouse *psmouse) etd->samples[0], etd->samples[1], etd->samples[2]); } + if (etd->samples[1] == 0x74 && etd->hw_version == 0x03) { + /* + * This module has a bug which makes absolute mode + * unusable, so let's abort so we'll be using standard + * PS/2 protocol. + */ + psmouse_info(psmouse, + "absolute mode broken, forcing standard PS/2 protocol\n"); + goto init_fail; + } + if (elantech_set_absolute_mode(psmouse)) { psmouse_err(psmouse, "failed to put touchpad into absolute mode.\n"); |