[PATCH 3.4 104/172] Input: synaptics - query min dimensions for fw v8.1

lizf
2015-06-16T09:13:45Z

From: Daniel Martin <consume.noise@gmail.com>

3.4.108-rc1 review patch. If anyone has any objections, please let me know.

------------------

commit ac097930f0730a9b777737de2b51e0fc49d2be7a upstream.

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

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>
Signed-off-by: Zefan Li <lizefan@huawei.com>
---
drivers/input/mouse/synaptics.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c
index 97e5f6f..11c732e 100644
--- a/drivers/input/mouse/synaptics.c
+++ b/drivers/input/mouse/synaptics.c
@@ -274,8 +274,14 @@ 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");
--
1.9.1