From: "phoenix" <phoenix@emc.com.tw>
To: <linux-kernel@vger.kernel.org>, <linux-input@vger.kernel.org>,
<dmitry.torokhov@gmail.com>
Cc: <jingle.wu@emc.com.tw>, <josh.chen@emc.com.tw>, <dave.wang@emc.com.tw>
Subject: RE: [PATCH] Input: elantench - Fix the firmware misreport coordinates for trackpoint occasionally.
Date: Mon, 30 Aug 2021 20:19:48 +0800 [thread overview]
Message-ID: <000001d79d99$53762dd0$fa628970$@emc.com.tw> (raw)
In-Reply-To: <20210729010940.5752-1-phoenix@emc.com.tw>
Hi Dmitry,
Would you review this patch, thanks
Best regards,
Phoenix Huang
-----Original Message-----
From: Phoenix Huang [mailto:phoenix@emc.com.tw]
Sent: Thursday, July 29, 2021 9:10 AM
To: linux-kernel@vger.kernel.org; linux-input@vger.kernel.org;
dmitry.torokhov@gmail.com
Cc: jingle.wu@emc.com.tw; josh.chen@emc.com.tw; dave.wang@emc.com.tw;
Phoenix Huang <phoenix@emc.com.tw>
Subject: [PATCH] Input: elantench - Fix the firmware misreport coordinates
for trackpoint occasionally.
Signed-off-by: Phoenix Huang <phoenix@emc.com.tw>
---
drivers/input/mouse/elantech.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/input/mouse/elantech.c b/drivers/input/mouse/elantech.c
index 2d0bc029619f..07e1098f2d31 100644
--- a/drivers/input/mouse/elantech.c
+++ b/drivers/input/mouse/elantech.c
@@ -517,6 +517,17 @@ static void elantech_report_trackpoint(struct psmouse
*psmouse,
case 0x16008020U:
case 0x26800010U:
case 0x36808000U:
+
+ /* This firmware misreport coordinates for trackpoint
occasionally.
+ * So we discard these packets by pattern to prevent cursor
jumps.
+ */
+ if (packet[4] == 0x80 || packet[5] == 0x80 ||
+ packet[1] >> 7 == packet[4] >> 7 ||
+ packet[2] >> 7 == packet[5] >> 7) {
+ elantech_debug("discarding packet [%6ph]\n",
packet);
+ break;
+
+ }
x = packet[4] - (int)((packet[1]^0x80) << 1);
y = (int)((packet[2]^0x80) << 1) - packet[5];
--
2.25.1
next prev parent reply other threads:[~2021-08-30 12:21 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-29 1:09 [PATCH] Input: elantench - Fix the firmware misreport coordinates for trackpoint occasionally Phoenix Huang
2021-08-30 12:19 ` phoenix [this message]
2021-08-30 20:23 ` Dmitry Torokhov
2021-09-10 2:18 ` phoenix
2021-11-07 20:02 ` Yufei Du
2021-11-08 6:06 ` Dmitry Torokhov
2021-11-08 6:14 ` Yufei Du
2021-11-10 6:24 ` Dmitry Torokhov
-- strict thread matches above, loose matches on Subject: below --
2021-07-29 1:03 Phoenix Huang
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to='000001d79d99$53762dd0$fa628970$@emc.com.tw' \
--to=phoenix@emc.com.tw \
--cc=dave.wang@emc.com.tw \
--cc=dmitry.torokhov@gmail.com \
--cc=jingle.wu@emc.com.tw \
--cc=josh.chen@emc.com.tw \
--cc=linux-input@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).