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| author | Éric Piel <E.A.B.Piel@tudelft.nl> | 2010-08-05 23:51:49 -0700 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2010-08-05 23:52:29 -0700 |
| commit | 7f29f17b57255b6395046805a98bc663ded63fb8 (patch) | |
| tree | 0ec8e1a2164f6e2c458d47ce631ff1fdc8ed5a75 /drivers/input/mouse | |
| parent | 7be3c13425ddeed8427cfaad65c9123c2c8ca331 (diff) | |
| download | kernel-common-7f29f17b57255b6395046805a98bc663ded63fb8.tar.gz kernel-common-7f29f17b57255b6395046805a98bc663ded63fb8.tar.bz2 kernel-common-7f29f17b57255b6395046805a98bc663ded63fb8.zip | |
Input: elantech - discard the first 2 positions on some firmwares
According to the Dell/Ubuntu driver, what was previously observed as
"jumpy cursor" corresponds to the hardware sending incorrect data for
the first two reports of a one touch finger. So let's use the same
workaround as in the other driver. Also, detect another firmware
version with the same behaviour, as in the other driver.
Signed-off-by: Éric Piel <eric.piel@tremplin-utc.net>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Diffstat (limited to 'drivers/input/mouse')
| -rw-r--r-- | drivers/input/mouse/elantech.c | 21 | ||||
| -rw-r--r-- | drivers/input/mouse/elantech.h | 7 |
2 files changed, 14 insertions, 14 deletions
diff --git a/drivers/input/mouse/elantech.c b/drivers/input/mouse/elantech.c index b18862b2a70e..bd5b91da169e 100644 --- a/drivers/input/mouse/elantech.c +++ b/drivers/input/mouse/elantech.c @@ -185,7 +185,6 @@ static void elantech_report_absolute_v1(struct psmouse *psmouse) struct elantech_data *etd = psmouse->private; unsigned char *packet = psmouse->packet; int fingers; - static int old_fingers; if (etd->fw_version < 0x020000) { /* @@ -203,10 +202,13 @@ static void elantech_report_absolute_v1(struct psmouse *psmouse) } if (etd->jumpy_cursor) { - /* Discard packets that are likely to have bogus coordinates */ - if (fingers > old_fingers) { + if (fingers != 1) { + etd->single_finger_reports = 0; + } else if (etd->single_finger_reports < 2) { + /* Discard first 2 reports of one finger, bogus */ + etd->single_finger_reports++; elantech_debug("discarding packet\n"); - goto discard_packet_v1; + return; } } @@ -238,9 +240,6 @@ static void elantech_report_absolute_v1(struct psmouse *psmouse) } input_sync(dev); - - discard_packet_v1: - old_fingers = fingers; } /* @@ -733,13 +732,13 @@ int elantech_init(struct psmouse *psmouse) etd->capabilities = param[0]; /* - * This firmware seems to suffer from misreporting coordinates when + * This firmware suffers from misreporting coordinates when * a touch action starts causing the mouse cursor or scrolled page * to jump. Enable a workaround. */ - if (etd->fw_version == 0x020022) { - pr_info("firmware version 2.0.34 detected, enabling jumpy cursor workaround\n"); - etd->jumpy_cursor = 1; + if (etd->fw_version == 0x020022 || etd->fw_version == 0x020600) { + pr_info("firmware version 2.0.34/2.6.0 detected, enabling jumpy cursor workaround\n"); + etd->jumpy_cursor = true; } if (elantech_set_absolute_mode(psmouse)) { diff --git a/drivers/input/mouse/elantech.h b/drivers/input/mouse/elantech.h index ac57bde1bb9f..aa4aac5d2198 100644 --- a/drivers/input/mouse/elantech.h +++ b/drivers/input/mouse/elantech.h @@ -100,10 +100,11 @@ struct elantech_data { unsigned char reg_26; unsigned char debug; unsigned char capabilities; - unsigned char paritycheck; - unsigned char jumpy_cursor; + bool paritycheck; + bool jumpy_cursor; unsigned char hw_version; - unsigned int fw_version; + unsigned int fw_version; + unsigned int single_finger_reports; unsigned char parity[256]; }; |