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Input: elantech - detect middle button based on firmware version 

Looks like the new generation of Lenovo machine also need to
be added to the PnPID whitelist. This is definitively not going
to scale, as there is nothing that tells us currently if a
touchpad supports a true physical middle button.

Consider that all new touchpads that are not clickpads
(so matching ETP_NEW_IC_SMBUS_HOST_NOTIFY) are handling 3 physical
buttons.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Benjamin Tissoires 2019-05-27 18:33:33 -07:00 committed by Dmitry Torokhov
parent 88463497dd
commit fd1cf11f71
2 changed files with 7 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
drivers/input/mouse/elantech.c
View File

@ -1107,16 +1107,6 @@ static const struct dmi_system_id elantech_dmi_has_middle_button[] = {
{ }
};
static const char * const middle_button_pnp_ids[] = {
"LEN2131", /* ThinkPad P52 w/ NFC */
"LEN2132", /* ThinkPad P52 */
"LEN2133", /* ThinkPad P72 w/ NFC */
"LEN2134", /* ThinkPad P72 */
"LEN0407",
"LEN0408",
NULL
};
/*
* Set the appropriate event bits for the input subsystem
*/
@ -1135,8 +1125,7 @@ static int elantech_set_input_params(struct psmouse *psmouse)
__clear_bit(EV_REL, dev->evbit);
__set_bit(BTN_LEFT, dev->keybit);
if (dmi_check_system(elantech_dmi_has_middle_button) ||
psmouse_matches_pnp_id(psmouse, middle_button_pnp_ids))
if (info->has_middle_button)
__set_bit(BTN_MIDDLE, dev->keybit);
__set_bit(BTN_RIGHT, dev->keybit);
@ -1750,6 +1739,11 @@ static int elantech_query_info(struct psmouse *psmouse,
break;
}
/* check for the middle button: DMI matching or new v4 firmwares */
info->has_middle_button = dmi_check_system(elantech_dmi_has_middle_button) ||
(ETP_NEW_IC_SMBUS_HOST_NOTIFY(info->fw_version) &&
!elantech_is_buttonpad(info));
return 0;
}

1
drivers/input/mouse/elantech.h
View File

@ -158,6 +158,7 @@ struct elantech_device_info {
bool crc_enabled;
bool set_hw_resolution;
bool has_trackpoint;
bool has_middle_button;
int (*send_cmd)(struct psmouse *psmouse, unsigned char c,
unsigned char *param);
};