linux-kernel - [PATCH 09/10] HID: bpf: add the Huion Kamvas 27 Pro

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Message-Id: <20251118-wip-sync-udev-hid-bpf-v1-9-0f8105c54835@kernel.org>
Date: Tue, 18 Nov 2025 18:16:30 +0100
From: Benjamin Tissoires <bentiss@...nel.org>
To: Jiri Kosina <jikos@...nel.org>
Cc: linux-kernel@...r.kernel.org, linux-input@...r.kernel.org, 
 Benjamin Tissoires <bentiss@...nel.org>, 
 Peter Hutterer <peter.hutterer@...-t.net>
Subject: [PATCH 09/10] HID: bpf: add the Huion Kamvas 27 Pro

Same issues with a secondary tip switch instead of secondary barrel
switch as the Kamvas 19.

Copy the stable Kamvas 19 support back into testing and add the vid/pid
for the Kamvas 27.

Signed-off-by: Peter Hutterer <peter.hutterer@...-t.net>
Link: https://gitlab.freedesktop.org/libevdev/udev-hid-bpf/-/merge_requests/189
Signed-off-by: Benjamin Tissoires <bentiss@...nel.org>
---
 drivers/hid/bpf/progs/Huion__Kamvas-Pro-19.bpf.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/hid/bpf/progs/Huion__Kamvas-Pro-19.bpf.c b/drivers/hid/bpf/progs/Huion__Kamvas-Pro-19.bpf.c
index 489cb4fcc2cd2702e4d996ad9435ba0ca454b6d9..5f43e407184854d860eeed4e857acee8bcbd272d 100644
--- a/drivers/hid/bpf/progs/Huion__Kamvas-Pro-19.bpf.c
+++ b/drivers/hid/bpf/progs/Huion__Kamvas-Pro-19.bpf.c
@@ -9,12 +9,15 @@
 
 #define VID_HUION 0x256C
 #define PID_KAMVAS_PRO_19 0x006B
+#define PID_KAMVAS_PRO_27 0x006c
 #define NAME_KAMVAS_PRO_19 "HUION Huion Tablet_GT1902"
+#define NAME_KAMVAS_PRO_27 "HUION Huion Tablet_GT2701"
 
 #define TEST_PREFIX "uhid test "
 
 HID_BPF_CONFIG(
 	HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8, VID_HUION, PID_KAMVAS_PRO_19),
+	HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8, VID_HUION, PID_KAMVAS_PRO_27),
 );
 
 bool prev_was_out_of_range;
@@ -351,7 +354,8 @@ int probe(struct hid_bpf_probe_args *ctx)
 	if (!__builtin_memcmp(name, TEST_PREFIX, sizeof(TEST_PREFIX) - 1))
 		name += sizeof(TEST_PREFIX) - 1;
 
-	if (__builtin_memcmp(name, NAME_KAMVAS_PRO_19, sizeof(NAME_KAMVAS_PRO_19)))
+	if (__builtin_memcmp(name, NAME_KAMVAS_PRO_19, sizeof(NAME_KAMVAS_PRO_19)) &&
+	    __builtin_memcmp(name, NAME_KAMVAS_PRO_27, sizeof(NAME_KAMVAS_PRO_27)))
 		ctx->retval = -EINVAL;
 
 	hid_bpf_release_context(hctx);

-- 
2.51.1