[PATCH 4/6] HID: plantronics: Expose headset telephony buttons

hid-plantronics uses a custom input mapping, where unhandled usages get
ignored. Although these headsets have telephony buttons (microphone mute
and answer/hangup), they are not handled in plantronics_input_mapping,
hence not exposed to the userspace. This commit fixes it by adding a
case for HID_UP_TELEPHONY to the "basic telephony compliant" devices.

Tested with Plantronics Blackwire 3220 Series (047f:c056).

Signed-off-by: Maxim Mikityanskiy <redacted>
---
 drivers/hid/hid-plantronics.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/hid/hid-plantronics.c b/drivers/hid/hid-plantronics.c
index ea056235a591..19d6cddff86a 100644
--- a/drivers/hid/hid-plantronics.c
+++ b/drivers/hid/hid-plantronics.c

@@ -84,6 +84,8 @@ static int plantronics_input_mapping(struct hid_device *hdev,
 		 (plt_type & HID_USAGE) != PLT_BASIC_EXCEPTION) {
 		if (PLT_ALLOW_CONSUMER)
 			goto defaulted;
+		if ((usage->hid & HID_USAGE_PAGE) == HID_UP_TELEPHONY)
+			goto defaulted;
 	}
 	/* not 'basic telephony' - apply legacy mapping */
 	/* only map if the field is in the device's primary vendor page */

-- 
2.32.0