linux-kernel - [PATCH for-5.19/uclogic 3/5] HID: uclogic: Pass keyboard reports as is

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Date:   Thu, 21 Apr 2022 19:50:50 +0200
From:   José Expósito <jose.exposito89@...il.com>
To:     jikos@...nel.org
Cc:     benjamin.tissoires@...hat.com, spbnick@...il.com,
        linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
        José Expósito <jose.exposito89@...il.com>
Subject: [PATCH for-5.19/uclogic 3/5] HID: uclogic: Pass keyboard reports as is

From: Nikolai Kondrashov <spbnick@...il.com>

Allow keyboard reports from interface #1 of Huion tablets to pass
unmodified, and stop the Wacom X.org driver from handling them.

The method for the latter is rather crude and also take the Dial reports
from the Wacom driver, but it's expected that libinput will be able to
handle them (still to be tested).

This enables Huion HS611 media and desktop keys.

Signed-off-by: Nikolai Kondrashov <spbnick@...il.com>
Signed-off-by: José Expósito <jose.exposito89@...il.com>
---
 drivers/hid/hid-uclogic-params.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/hid/hid-uclogic-params.c b/drivers/hid/hid-uclogic-params.c
index 09c332c6a412..b85585ac3372 100644
--- a/drivers/hid/hid-uclogic-params.c
+++ b/drivers/hid/hid-uclogic-params.c
@@ -711,8 +711,12 @@ static int uclogic_params_huion_init(struct uclogic_params *params,
 	iface = to_usb_interface(hdev->dev.parent);
 	bInterfaceNumber = iface->cur_altsetting->desc.bInterfaceNumber;
 
-	/* If it's not a pen interface */
-	if (bInterfaceNumber != 0) {
+	/* If it's a custom keyboard interface */
+	if (bInterfaceNumber == 1) {
+		/* Keep everything intact */
+		goto output;
+	/* Else, if it's not a pen interface */
+	} else if (bInterfaceNumber != 0) {
 		uclogic_params_init_invalid(&p);
 		goto output;
 	}
-- 
2.25.1