Re: [PATCH] Input: psmouse - add small delay for IBM trackpoint pass-through mode
From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Date: 2015-08-26 20:13:25
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On Sat, Aug 15, 2015 at 04:40:18PM +0200, Stefan Assmann wrote:
There are trackpoint devices that fail to respond to the PS2 command PSMOUSE_CMD_GETID if immediately queried after the parent device is deactivated. Add a small delay for the hardware to get in a sane state before sending any PS2 commands. One example of such a system is: Lenovo ThinkPad X120e, model 30515QG synaptics: Touchpad model: 1, fw: 8.0, id: 0x1e2b1, caps: 0xd001a3/0x940300/0x121c00, board id: 1811, fw id: 797391 Signed-off-by: Stefan Assmann <redacted>
Applied, thank you.
quoted hunk ↗ jump to hunk
--- drivers/input/mouse/psmouse-base.c | 4 ++++ 1 file changed, 4 insertions(+)diff --git a/drivers/input/mouse/psmouse-base.c b/drivers/input/mouse/psmouse-base.c index ec347703..ad18dab 100644 --- a/drivers/input/mouse/psmouse-base.c +++ b/drivers/input/mouse/psmouse-base.c@@ -1540,6 +1540,10 @@ static int psmouse_connect(struct serio *serio, struct serio_driver *drv) if (error) goto err_clear_drvdata; + /* give PT device some time to settle down before probing */ + if (serio->id.type == SERIO_PS_PSTHRU) + usleep_range(10000, 15000); + if (psmouse_probe(psmouse) < 0) { error = -ENODEV; goto err_close_serio;-- 2.4.3
-- Dmitry