Input: synaptics - query min dimensions for fw v8.1

Query the min dimensions even if the check
SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 7 fails, but we know that the
firmware version 8.1 is safe.

With that we don't need quirks for post-2013 models anymore as they expose
correct min and max dimensions.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=91541

Cc: stable@vger.kernel.org
Signed-off-by: Daniel Martin <consume.noise@gmail.com>
  re-order the tests to check SYN_CAP_MIN_DIMENSIONS even on FW 8.1
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c
index 47c5dca20a60e63e4f5f369b2e651fea341528c4..87c37f745b929639e1d2b4841ebcb4efb023fcbc 100644 (file)
--- a/drivers/input/mouse/synaptics.c
+++ b/drivers/input/mouse/synaptics.c
@@ -368,8 +368,14 @@ static int synaptics_resolution(struct psmouse *psmouse)
                }
        }
 
-       if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 7 &&
-           SYN_CAP_MIN_DIMENSIONS(priv->ext_cap_0c)) {
+       if (SYN_CAP_MIN_DIMENSIONS(priv->ext_cap_0c) &&
+           (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 7 ||
+            /*
+             * Firmware v8.1 does not report proper number of extended
+             * capabilities, but has been proven to report correct min
+             * coordinates.
+             */
+            SYN_ID_FULL(priv->identity) == 0x801)) {
                if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MIN_COORDS, resp)) {
                        psmouse_warn(psmouse,
                                     "device claims to have min coordinates query, but I'm not able to read it.\n");