Re: [PATCH] HID: multitouch: add support for Type Cover Pro 3

On Jun 17 2016 or thereabouts, Jiri Kosina wrote:

On Fri, 17 Jun 2016, Dennis Chen wrote:

quoted

Include Microsoft Type Cover 3 support into hid-multitouch.c
Allow touchpad device to have multitouch functionality.

Signed-off-by: Dennis Chen <redacted>
---
 drivers/hid/Kconfig          |  1 +
 drivers/hid/hid-multitouch.c | 14 ++++++++++++++
 2 files changed, 15 insertions(+)

diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
index 5646ca4..5af0603 100644
--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig

@@ -530,6 +530,7 @@ config HID_MULTITOUCH

 	  - IrTouch Infrared USB panels
 	  - LG Display panels (Dell ST2220Tc)
 	  - Lumio CrystalTouch panels
+	  - Microsoft Type Cover 3 touchpad
 	  - MosArt dual-touch panels
 	  - Panasonic multitouch panels
 	  - PenMount dual touch panels

diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index c741f5e..f052ed2 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c

@@ -1377,6 +1377,20 @@ static const struct hid_device_id mt_devices[] = {

 		MT_USB_DEVICE(USB_VENDOR_ID_ILITEK,
 			USB_DEVICE_ID_ILITEK_MULTITOUCH) },
 
+	/* Microsoft Type Cover 3 touchpad */
+	{ .driver_data = MT_CLS_EXPORT_ALL_INPUTS,
+		MT_USB_DEVICE(USB_VENDOR_ID_MICROSOFT,
+			USB_DEVICE_ID_MS_TYPE_COVER_PRO_3) },
+	{ .driver_data = MT_CLS_EXPORT_ALL_INPUTS,
+		MT_USB_DEVICE(USB_VENDOR_ID_MICROSOFT,
+			USB_DEVICE_ID_MS_TYPE_COVER_PRO_3_2) },
+	{ .driver_data = MT_CLS_EXPORT_ALL_INPUTS,
+		MT_USB_DEVICE(USB_VENDOR_ID_MICROSOFT,
+			USB_DEVICE_ID_MS_TYPE_COVER_PRO_3_JP) },
+	{ .driver_data = MT_CLS_EXPORT_ALL_INPUTS,
+		MT_USB_DEVICE(USB_VENDOR_ID_MICROSOFT,
+			USB_DEVICE_ID_MS_TYPE_COVER_3) },
+
 	/* MosArt panels */
 	{ .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,

This would mean that both hid-multitouch and hid-microsoft would claim 
support for this device, which isn't really going to provide consistent 
user experience. Is MT_CLS_EXPORT_ALL_INPUTS sufficient to provide 
complete functionality by hid-multitouch? If so, the support from 
hid-microsoft should be dropped.

Also, please see if the series with the 2 following patches is not
sufficient enough:
http://www.spinics.net/lists/linux-input/msg44576.html
http://www.spinics.net/lists/linux-input/msg44577.html

If you just adapt the second patch to add your ids, it should hopefully
be working (though the surface book is not for some unknown reasons
yet).

Cheers,
Benjamin

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