lkml.org 
[lkml]   [2012]   [Feb]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
SubjectRe: [PATCH v2] Input: ALPS - Fix ALPS touchpad detection
This is definitely a bug which isn't fixed for nine years.
Why this patch isn't applied to the input sub-system (or mainline)?

Seth Forshee wrote:
> On Thu, Feb 16, 2012 at 10:11:55PM +0900, Akio Idehara wrote:
>> ALPS touchpad detection fails if some buttons of ALPS are pressed.
>> The reason is that the "E6" query response byte is different from
>> what is expected.
>> This was tested on a Toshiba Portege R500.
>>
>> Cc: stable<stable@vger.kernel.org>
>> Signed-off-by: Akio Idehara<zbe64533@gmail.com>
>
> This version is working fine for me. Thanks!
>
> Tested-by: Seth Forshee<seth.forshee@canonical.com>

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
ALPS touchpad detection fails if some buttons of ALPS are pressed.
The reason is that the "E6" query response byte is different from
what is expected.
This was tested on a Toshiba Portege R500.

Cc: stable <stable@vger.kernel.org>
Signed-off-by: Akio Idehara <zbe64533@gmail.com>
Tested-by: Seth Forshee<seth.forshee@canonical.com>
---
Documentation/input/alps.txt | 3 ++-
drivers/input/mouse/alps.c | 7 +++++--
2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/Documentation/input/alps.txt b/Documentation/input/alps.txt
index f274c28..2f95308 100644
--- a/Documentation/input/alps.txt
+++ b/Documentation/input/alps.txt
@@ -13,7 +13,8 @@ Detection

All ALPS touchpads should respond to the "E6 report" command sequence:
E8-E6-E6-E6-E9. An ALPS touchpad should respond with either 00-00-0A or
-00-00-64.
+00-00-64 if no buttons are pressed. The bits 0-2 of the first byte will be 1s
+if some buttons are pressed.

If the E6 report is successful, the touchpad model is identified using the "E7
report" sequence: E8-E7-E7-E7-E9. The response is the model signature and is
diff --git a/drivers/input/mouse/alps.c b/drivers/input/mouse/alps.c
index bd87380..4c6a72d 100644
--- a/drivers/input/mouse/alps.c
+++ b/drivers/input/mouse/alps.c
@@ -952,7 +952,9 @@ static const struct alps_model_info *alps_get_model(struct psmouse *psmouse, int

/*
* First try "E6 report".
- * ALPS should return 0,0,10 or 0,0,100
+ * ALPS should return 0,0,10 or 0,0,100 if no buttons are pressed.
+ * The bits 0-2 of the first byte will be 1s if some buttons are
+ * pressed.
*/
param[0] = 0;
if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES) ||
@@ -968,7 +970,8 @@ static const struct alps_model_info *alps_get_model(struct psmouse *psmouse, int
psmouse_dbg(psmouse, "E6 report: %2.2x %2.2x %2.2x",
param[0], param[1], param[2]);

- if (param[0] != 0 || param[1] != 0 || (param[2] != 10 && param[2] != 100))
+ if ((param[0] & 0xf8) != 0 || param[1] != 0 ||
+ (param[2] != 10 && param[2] != 100))
return NULL;

/*
-- 1.7.9

\
 
 \ /
  Last update: 2012-02-23 15:43    [W:0.039 / U:16.088 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site