New Acer laptops (Aspire A315-31 and several others) have an EC which
expects the PS/2 reset command to happen during boot.
On Linux, that means that currently the touchpad is unresponsive until
suspend/resume, when psmouse_reconnect() resets the device.
We observe that Windows sends a PS/2 reset command during boot.
Make Linux do the same here, making the touchpad usable on these
new products.
Signed-off-by: Daniel Drake <drake@xxxxxxxxxxxx>
---
drivers/input/mouse/psmouse-base.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/input/mouse/psmouse-base.c b/drivers/input/mouse/psmouse-base.c
index f73b47b8c578..8f3c903db7b9 100644
--- a/drivers/input/mouse/psmouse-base.c
+++ b/drivers/input/mouse/psmouse-base.c
@@ -1591,6 +1591,12 @@ static int psmouse_connect(struct serio *serio, struct serio_driver *drv)
psmouse->resync_time = parent ? 0 : psmouse_resync_time;
psmouse->smartscroll = psmouse_smartscroll;
+ /* Reset the device, even though we would ordinarily expect it to
+ * already be in the reset state. This matches Windows behaviour,
+ * which some ECs require.
+ */
+ psmouse_reset(psmouse);
+
psmouse_switch_protocol(psmouse, NULL);
if (!psmouse->protocol->smbus_companion) {
--
2.11.0
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