[PATCH AUTOSEL 5.15 10/13] HID: Add quirk for Logitech Casa touchpad

[PATCH AUTOSEL 5.15 10/13] HID: Add quirk for Logitech Casa touchpad

[Sasha Levin]

From: Sean O'Brien <seobrien@chromium.org>

[ Upstream commit dd2c345a94cfa3873cc20db87387ee509c345c1b ]

This device sometimes doesn't send touch release signals when moving
from >=4 fingers to <4 fingers. Using MT_QUIRK_NOT_SEEN_MEANS_UP instead
of MT_QUIRK_ALWAYS_VALID makes sure that no touches become stuck.

MT_QUIRK_FORCE_MULTI_INPUT is not necessary for this device, but does no
harm.

Signed-off-by: Sean O'Brien <seobrien@chromium.org>
Signed-off-by: Jiri Kosina <jkosina@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/hid/hid-ids.h        | 1 +
 drivers/hid/hid-multitouch.c | 6 ++++++
 2 files changed, 7 insertions(+)

diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index 7b1fdfde5b405..0504bdd465013 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -777,6 +777,7 @@
 #define USB_DEVICE_ID_LOGITECH_AUDIOHUB 0x0a0e
 #define USB_DEVICE_ID_LOGITECH_T651	0xb00c
 #define USB_DEVICE_ID_LOGITECH_DINOVO_EDGE_KBD	0xb309
+#define USB_DEVICE_ID_LOGITECH_CASA_TOUCHPAD	0xbb00
 #define USB_DEVICE_ID_LOGITECH_C007	0xc007
 #define USB_DEVICE_ID_LOGITECH_C077	0xc077
 #define USB_DEVICE_ID_LOGITECH_RECEIVER	0xc101
diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index 2e14e3071aa69..fea27d66d91c0 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -2082,6 +2082,12 @@ static const struct hid_device_id mt_devices[] = {
 			   USB_VENDOR_ID_LENOVO,
 			   USB_DEVICE_ID_LENOVO_X12_TAB) },
 
+	/* Logitech devices */
+	{ .driver_data = MT_CLS_NSMU,
+		HID_DEVICE(BUS_BLUETOOTH, HID_GROUP_MULTITOUCH_WIN_8,
+			USB_VENDOR_ID_LOGITECH,
+			USB_DEVICE_ID_LOGITECH_CASA_TOUCHPAD) },
+
 	/* MosArt panels */
 	{ .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
 		MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
-- 
2.43.0

[PATCH AUTOSEL 5.15 12/13] HID: bpf: add in-tree HID-BPF fix for the HP Elite Presenter Mouse

[Sasha Levin]

From: Benjamin Tissoires <bentiss@kernel.org>

[ Upstream commit 4e6d2a297dd5be26ad409b7a05b20bd033d1c95e ]

Duplicate of commit 0db117359e47 ("HID: add quirk for 03f0:464a HP Elite
Presenter Mouse"), but in a slightly better way.

This time we actually change the application collection, making clearer
for userspace what the second mouse is.

Note that having both hid-quirks fix and this HID-BPF fix is not a
problem at all.

Link: https://lore.kernel.org/r/20240410-bpf_sources-v1-4-a8bf16033ef8@kernel.org
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Benjamin Tissoires <bentiss@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 .../hid/bpf/progs/HP__Elite-Presenter.bpf.c   | 58 +++++++++++++++++++
 1 file changed, 58 insertions(+)
 create mode 100644 drivers/hid/bpf/progs/HP__Elite-Presenter.bpf.c

diff --git a/drivers/hid/bpf/progs/HP__Elite-Presenter.bpf.c b/drivers/hid/bpf/progs/HP__Elite-Presenter.bpf.c
new file mode 100644
index 0000000000000..3d14bbb6f2762
--- /dev/null
+++ b/drivers/hid/bpf/progs/HP__Elite-Presenter.bpf.c
@@ -0,0 +1,58 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* Copyright (c) 2023 Benjamin Tissoires
+ */
+
+#include "vmlinux.h"
+#include "hid_bpf.h"
+#include "hid_bpf_helpers.h"
+#include <bpf/bpf_tracing.h>
+
+#define VID_HP 0x03F0
+#define PID_ELITE_PRESENTER 0x464A
+
+HID_BPF_CONFIG(
+	HID_DEVICE(BUS_BLUETOOTH, HID_GROUP_GENERIC, VID_HP, PID_ELITE_PRESENTER)
+);
+
+/*
+ * Already fixed as of commit 0db117359e47 ("HID: add quirk for 03f0:464a
+ * HP Elite Presenter Mouse") in the kernel, but this is a slightly better
+ * fix.
+ *
+ * The HP Elite Presenter Mouse HID Record Descriptor shows
+ * two mice (Report ID 0x1 and 0x2), one keypad (Report ID 0x5),
+ * two Consumer Controls (Report IDs 0x6 and 0x3).
+ * Prior to these fixes it registers one mouse, one keypad
+ * and one Consumer Control, and it was usable only as a
+ * digital laser pointer (one of the two mouses).
+ * We replace the second mouse collection with a pointer collection,
+ * allowing to use the device both as a mouse and a digital laser
+ * pointer.
+ */
+
+SEC("fmod_ret/hid_bpf_rdesc_fixup")
+int BPF_PROG(hid_fix_rdesc, struct hid_bpf_ctx *hctx)
+{
+	__u8 *data = hid_bpf_get_data(hctx, 0 /* offset */, 4096 /* size */);
+
+	if (!data)
+		return 0; /* EPERM check */
+
+	/* replace application mouse by application pointer on the second collection */
+	if (data[79] == 0x02)
+		data[79] = 0x01;
+
+	return 0;
+}
+
+SEC("syscall")
+int probe(struct hid_bpf_probe_args *ctx)
+{
+	ctx->retval = ctx->rdesc_size != 264;
+	if (ctx->retval)
+		ctx->retval = -EINVAL;
+
+	return 0;
+}
+
+char _license[] SEC("license") = "GPL";
-- 
2.43.0

Re: [PATCH AUTOSEL 5.15 12/13] HID: bpf: add in-tree HID-BPF fix for the HP Elite Presenter Mouse

[Benjamin Tissoires]

On May 27 2024, Sasha Levin wrote:
> From: Benjamin Tissoires <bentiss@kernel.org>
> 
> [ Upstream commit 4e6d2a297dd5be26ad409b7a05b20bd033d1c95e ]
> 
> Duplicate of commit 0db117359e47 ("HID: add quirk for 03f0:464a HP Elite
> Presenter Mouse"), but in a slightly better way.
> 
> This time we actually change the application collection, making clearer
> for userspace what the second mouse is.
> 
> Note that having both hid-quirks fix and this HID-BPF fix is not a
> problem at all.

Please drop this patch in all backports (and FWIW, any fix in drivers/hid/bpf/progs/).

HID-BPF is only available since kernel v6.3, and the compilation output
of the in-tree file is not used directly, but shipped from udev-hid-bpf.

TL;DR: this just adds noise to those stable kernel trees.

Cheers,
Benjamin


> 
> Link: https://lore.kernel.org/r/20240410-bpf_sources-v1-4-a8bf16033ef8@kernel.org
> Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
> Signed-off-by: Benjamin Tissoires <bentiss@kernel.org>
> Signed-off-by: Sasha Levin <sashal@kernel.org>
> ---
>  .../hid/bpf/progs/HP__Elite-Presenter.bpf.c   | 58 +++++++++++++++++++
>  1 file changed, 58 insertions(+)
>  create mode 100644 drivers/hid/bpf/progs/HP__Elite-Presenter.bpf.c
> 
> diff --git a/drivers/hid/bpf/progs/HP__Elite-Presenter.bpf.c b/drivers/hid/bpf/progs/HP__Elite-Presenter.bpf.c
> new file mode 100644
> index 0000000000000..3d14bbb6f2762
> --- /dev/null
> +++ b/drivers/hid/bpf/progs/HP__Elite-Presenter.bpf.c
> @@ -0,0 +1,58 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/* Copyright (c) 2023 Benjamin Tissoires
> + */
> +
> +#include "vmlinux.h"
> +#include "hid_bpf.h"
> +#include "hid_bpf_helpers.h"
> +#include <bpf/bpf_tracing.h>
> +
> +#define VID_HP 0x03F0
> +#define PID_ELITE_PRESENTER 0x464A
> +
> +HID_BPF_CONFIG(
> +	HID_DEVICE(BUS_BLUETOOTH, HID_GROUP_GENERIC, VID_HP, PID_ELITE_PRESENTER)
> +);
> +
> +/*
> + * Already fixed as of commit 0db117359e47 ("HID: add quirk for 03f0:464a
> + * HP Elite Presenter Mouse") in the kernel, but this is a slightly better
> + * fix.
> + *
> + * The HP Elite Presenter Mouse HID Record Descriptor shows
> + * two mice (Report ID 0x1 and 0x2), one keypad (Report ID 0x5),
> + * two Consumer Controls (Report IDs 0x6 and 0x3).
> + * Prior to these fixes it registers one mouse, one keypad
> + * and one Consumer Control, and it was usable only as a
> + * digital laser pointer (one of the two mouses).
> + * We replace the second mouse collection with a pointer collection,
> + * allowing to use the device both as a mouse and a digital laser
> + * pointer.
> + */
> +
> +SEC("fmod_ret/hid_bpf_rdesc_fixup")
> +int BPF_PROG(hid_fix_rdesc, struct hid_bpf_ctx *hctx)
> +{
> +	__u8 *data = hid_bpf_get_data(hctx, 0 /* offset */, 4096 /* size */);
> +
> +	if (!data)
> +		return 0; /* EPERM check */
> +
> +	/* replace application mouse by application pointer on the second collection */
> +	if (data[79] == 0x02)
> +		data[79] = 0x01;
> +
> +	return 0;
> +}
> +
> +SEC("syscall")
> +int probe(struct hid_bpf_probe_args *ctx)
> +{
> +	ctx->retval = ctx->rdesc_size != 264;
> +	if (ctx->retval)
> +		ctx->retval = -EINVAL;
> +
> +	return 0;
> +}
> +
> +char _license[] SEC("license") = "GPL";
> -- 
> 2.43.0
>