Thread (5 messages) 5 messages, 2 authors, 2021-10-21

Re: [PATCH v12 2/3] HID: quirks: Invert X/Y values for rM2 Wacom

From: Benjamin Tissoires <hidden>
Date: 2021-10-21 10:05:56
Also in: linux-arm-kernel, linux-devicetree, lkml

On Thu, Oct 21, 2021 at 11:51 AM Alistair Francis
[off-list ref] wrote:
quoted hunk ↗ jump to hunk
Enable the HID_QUIRK_XY_INVERT quirk for the Wacom digitiser used on the
reMarkable 2.

Signed-off-by: Alistair Francis <redacted>
---
 drivers/hid/hid-ids.h    | 2 ++
 drivers/hid/hid-quirks.c | 1 +
 2 files changed, 3 insertions(+)
diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index 29564b370341..9dc17bf3e550 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -1260,8 +1260,10 @@
 #define USB_DEVICE_ID_VTL_MULTITOUCH_FF3F      0xff3f

 #define USB_VENDOR_ID_WACOM            0x056a
+#define USB_VENDOR_ID_WACOM_HID                0x2D1F
 #define USB_DEVICE_ID_WACOM_GRAPHIRE_BLUETOOTH 0x81
 #define USB_DEVICE_ID_WACOM_INTUOS4_BLUETOOTH   0x00BD
+#define I2C_DEVICE_ID_WACOM_REMARKABLE2                0x0095

 #define USB_VENDOR_ID_WALTOP                           0x172f
 #define USB_DEVICE_ID_WALTOP_SLIM_TABLET_5_8_INCH      0x0032
diff --git a/drivers/hid/hid-quirks.c b/drivers/hid/hid-quirks.c
index 2e104682c22b..b081af3329a5 100644
--- a/drivers/hid/hid-quirks.c
+++ b/drivers/hid/hid-quirks.c
@@ -186,6 +186,7 @@ static const struct hid_device_id hid_quirks[] = {
        { HID_USB_DEVICE(USB_VENDOR_ID_TURBOX, USB_DEVICE_ID_TURBOX_KEYBOARD), HID_QUIRK_NOGET },
        { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, USB_DEVICE_ID_UCLOGIC_TABLET_KNA5), HID_QUIRK_MULTI_INPUT },
        { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, USB_DEVICE_ID_UCLOGIC_TABLET_TWA60), HID_QUIRK_MULTI_INPUT },
+       { HID_I2C_DEVICE(USB_VENDOR_ID_WACOM_HID, I2C_DEVICE_ID_WACOM_REMARKABLE2), HID_QUIRK_XY_INVERT },
Well, there is no guarantee that this PID will always be installed in
this particular configuration.

Can you instead set the quirk in i2c_hid?:
- retrieve that information from the DT in
drivers/hid/i2c-hid/i2c-hid-of.c (with the generic touchscreen OF
properties)
- amend the signature of i2c_hid_core_probe() to account for extra quirks
- after having allocated the device, add the provided quirks

Then I still need to figure out how we can add tests for the quirk.

Cheers,
Benjamin
        { HID_USB_DEVICE(USB_VENDOR_ID_WALTOP, USB_DEVICE_ID_WALTOP_MEDIA_TABLET_10_6_INCH), HID_QUIRK_MULTI_INPUT },
        { HID_USB_DEVICE(USB_VENDOR_ID_WALTOP, USB_DEVICE_ID_WALTOP_MEDIA_TABLET_14_1_INCH), HID_QUIRK_MULTI_INPUT },
        { HID_USB_DEVICE(USB_VENDOR_ID_WALTOP, USB_DEVICE_ID_WALTOP_SIRIUS_BATTERY_FREE_TABLET), HID_QUIRK_MULTI_INPUT },
--
2.31.1
  
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