The Fimware 8.1 has a bug in which the extra buttons are only sent
when the ExtBit is 1.
This should be fixed in a future FW update which should have a bump
of the minor version.
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@xxxxxxxxxx>
---
v2:
- break out extra buttons reporting in its own function
- use firmware version to remove the spurious releases
drivers/input/mouse/synaptics.c | 33 +++++++++++++++++++++++++--------
1 file changed, 25 insertions(+), 8 deletions(-)
diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c
index 3bd7032..a033fc7 100644
--- a/drivers/input/mouse/synaptics.c
+++ b/drivers/input/mouse/synaptics.c
@@ -815,14 +815,36 @@ static void synaptics_report_semi_mt_data(struct input_dev *dev,
}
}
-static void synaptics_report_buttons(struct psmouse *psmouse,
- const struct synaptics_hw_state *hw)
+static void synaptics_report_ext_buttons(struct psmouse *psmouse,
+ const struct synaptics_hw_state *hw)
{
struct input_dev *dev = psmouse->dev;
struct synaptics_data *priv = psmouse->private;
int ext_bits = (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) + 1) >> 1;
int i;
+ if (!SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap))
+ return;
+
+ /* bug in FW 8.1, buttons are reported only when ExtBit is 1 */
+ if ((SYN_ID_FULL(priv->identity) == 0x801) &&
+ !((psmouse->packet[0] ^ psmouse->packet[3]) & 0x02))
+ return;
+
+ for (i = 0; i < ext_bits; i++) {
+ input_report_key(dev, BTN_0 + 2 * i,
+ hw->ext_buttons & (1 << i));
+ input_report_key(dev, BTN_1 + 2 * i,
+ hw->ext_buttons & (1 << (i + ext_bits)));
+ }
+}
+
+static void synaptics_report_buttons(struct psmouse *psmouse,
+ const struct synaptics_hw_state *hw)
+{
+ struct input_dev *dev = psmouse->dev;
+ struct synaptics_data *priv = psmouse->private;
+
input_report_key(dev, BTN_LEFT, hw->left);
input_report_key(dev, BTN_RIGHT, hw->right);
@@ -834,12 +856,7 @@ static void synaptics_report_buttons(struct psmouse *psmouse,
input_report_key(dev, BTN_BACK, hw->down);
}
- for (i = 0; i < ext_bits; i++) {
- input_report_key(dev, BTN_0 + 2 * i,
- hw->ext_buttons & (1 << i));
- input_report_key(dev, BTN_1 + 2 * i,
- hw->ext_buttons & (1 << (i + ext_bits)));
- }
+ synaptics_report_ext_buttons(psmouse, hw);
}
static void synaptics_report_mt_data(struct psmouse *psmouse,
--
2.1.0
--
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