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Subject[PATCH 4.14 55/94] HID: sensor-hub: Restore fixup for Lenovo ThinkPad Helix 2 sensor hub report
Date
4.14-stable review patch.  If anyone has any objections, please let me know.

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

From: Hans de Goede <hdegoede@redhat.com>

[ Upstream commit ade573eb1e03d1ee5abcb3359b1259469ab6e8ed ]

Commit b0f847e16c1e ("HID: hid-sensor-hub: Force logical minimum to 1 for
power and report state") not only replaced the descriptor fixup done for
devices with the HID_SENSOR_HUB_ENUM_QUIRK with a generic fix, but also
accidentally removed the unrelated descriptor fixup for the Lenovo ThinkPad
Helix 2 sensor hub. This commit restores this fixup.

Restoring this fixup not only fixes the Lenovo ThinkPad Helix 2's sensors,
but also the Lenovo ThinkPad 8's sensors.

Fixes: b0f847e16c1e ("HID: hid-sensor-hub: Force logical minimum ...")
Cc: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Cc: Fernando D S Lima <fernandodsl@gmail.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/hid/hid-sensor-hub.c | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)

--- a/drivers/hid/hid-sensor-hub.c
+++ b/drivers/hid/hid-sensor-hub.c
@@ -579,6 +579,28 @@ void sensor_hub_device_close(struct hid_
}
EXPORT_SYMBOL_GPL(sensor_hub_device_close);

+static __u8 *sensor_hub_report_fixup(struct hid_device *hdev, __u8 *rdesc,
+ unsigned int *rsize)
+{
+ /*
+ * Checks if the report descriptor of Thinkpad Helix 2 has a logical
+ * minimum for magnetic flux axis greater than the maximum.
+ */
+ if (hdev->product == USB_DEVICE_ID_TEXAS_INSTRUMENTS_LENOVO_YOGA &&
+ *rsize == 2558 && rdesc[913] == 0x17 && rdesc[914] == 0x40 &&
+ rdesc[915] == 0x81 && rdesc[916] == 0x08 &&
+ rdesc[917] == 0x00 && rdesc[918] == 0x27 &&
+ rdesc[921] == 0x07 && rdesc[922] == 0x00) {
+ /* Sets negative logical minimum for mag x, y and z */
+ rdesc[914] = rdesc[935] = rdesc[956] = 0xc0;
+ rdesc[915] = rdesc[936] = rdesc[957] = 0x7e;
+ rdesc[916] = rdesc[937] = rdesc[958] = 0xf7;
+ rdesc[917] = rdesc[938] = rdesc[959] = 0xff;
+ }
+
+ return rdesc;
+}
+
static int sensor_hub_probe(struct hid_device *hdev,
const struct hid_device_id *id)
{
@@ -742,6 +764,7 @@ static struct hid_driver sensor_hub_driv
.probe = sensor_hub_probe,
.remove = sensor_hub_remove,
.raw_event = sensor_hub_raw_event,
+ .report_fixup = sensor_hub_report_fixup,
#ifdef CONFIG_PM
.suspend = sensor_hub_suspend,
.resume = sensor_hub_resume,

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