Re: [PATCH] HID: microsoft: Add Surface Pro 4 type cover support

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On Dec 05 2016 or thereabouts, Zhang Rui wrote:
> On Mon, 2016-12-05 at 09:18 +0100, Benjamin Tissoires wrote:
> > Hi,
> > 
> > On Dec 05 2016 or thereabouts, Zhang Rui wrote:
> > > 
> > > On Thu, 2016-12-01 at 13:53 +0100, Benjamin Tissoires wrote:
> > > > 
> > > > On Dec 01 2016 or thereabouts, Zhang Rui wrote:
> > > > > 
> > > > > 
> > > > > From edb2fc779c3e9c118686a3c177cfa304e95e0220 Mon Sep 17
> > > > > 00:00:00
> > > > > 2001
> > > > > From: Zhang Rui <rui.zhang@xxxxxxxxx>
> > > > > Date: Wed, 30 Nov 2016 20:09:11 +0800
> > > > > Subject: [PATCH] HID: microsoft: Add Surface Pro 4 type cover
> > > > > support
> > > > > 
> > > > > Adding support for the Microsoft Surface Pro 4 Type Cover.
> > > > > 
> > > > > This patch has been tested on my surface pro 4,
> > > > > keyboard starts working, while the touchpad does not.
> > > > > 
> > > > > I don't know which type of surface pro 4 I have, but the lsusb
> > > > > output
> > > > > shows it's ID is 07e8, and I use
> > > > > USB_DEVICE_ID_MS_TYPE_COVER_4_1 as
> > > > > the name, following the patch at
> > > > > https://bugzilla.kernel.org/show_bug.cgi?id=135561#c0
> > > > > 
> > > > > At the same time, this patch also fixes a long suspend/resume
> > > > > delay
> > > > > problem when type cover is attached.
> > > > Hi,
> > > > 
> > > > would you mind testing the for-next branch of the HID tree
> > > > without
> > > > your
> > > > patch?
> > > > https://git.kernel.org/cgit/linux/kernel/git/jikos/hid.git/log/dr
> > > > iver
> > > > s/hid?h=for-next
> > > > 
> > > yes, I did.
> > > 
> > > > 
> > > > This branch makes the Surface 3 typeCover working out of the box
> > > > without
> > > > the need for specific quirks. I would hope that this way, you
> > > > don't
> > > > need
> > > > the quirks for the Surface Pro 4 as well and forget about these
> > > > cover
> > > > :)
> > > yes, the keyboard works as expected.
> > > But unfortunately, I experienced a system hang, in like an hour,
> > > with
> > > both your next tree, and upstream kernel plus my original type
> > > cover
> > > patch... At the same time, I also noticed that, when I type
> > > something,
> > > occasionally, the character keeps on popping up just like the key
> > > is
> > > not released.
> > > Now I switch back to a clean upstream 4.9-rc6 kernel, and use it
> > > for
> > > half a day, no system hang so far.
> > I am not so sure I followed  your tests. Could you confirm and
> > complete that:
> > - upstream + your patch: keyboard works, 2 finger scroll doesn't but
> > it
> >   hangs after an hour or so, and keys are repeated from time to time
> yes.
> > - hid for-next branch: keyboard works, 2 finger scroll too, but it
> > hangs
> >   after an hour or so, and keys are repeated from time to time
> yes.
> > - vanilla kernel 4.9-rc6: no hangs, but what is the status of the
> >   keyboard/touchpad?
> > 
> No hangs, keyboard does not work at all.

Ok, thanks for the confirmation.

> 
> > I have the impression that when the keyboard is disabled (plain
> > v4.9-rc6) you don't experience hangs. So if that is the case, then
> > maybe
> > the keyboard is somewhat messing up the system. I don't know if that
> > would be counted as a regression :/
> 
> Right, that's also my concern.
> would you like to catch something for hid for-next branch? say, when
> the key repeats, I usually press some other key to stop the storm,
> would you like me to get some information after that?

Well, I would believe that we are missing the key release event. Given
the way keys are sent from the keyboard, it seems normal that if you
press one other key and release it, the kernel will release all of them.
The keys are sent as an array, so if you send a new key event, the
previous key will be cleared as it won't be part of the events.

One interesting bit could be to monitor the dmesg during these issues
and see if any warning happens.

One other interesting bit could be to check whether disabling runtime
suspend has an effect on the hangs.

Cheers,
Benjamin

> 
> I can switch back to hid for-next to confirm the symptom if needed.
> > 
> > Unless the keyboard is already working with a plain v4.9-rc6 but just
> > doesn't after suspend/resume...
> > 
> No, keyboard does not work with upstream kernel.
> 
> thanks,
> rui
> > Cheers,
> > Benjamin
> > 
> > > 
> > > 
> > > thanks,
> > > rui
> > > > 
> > > > 
> > > > Cheers,
> > > > Benjamin
> > > > 
> > > > > 
> > > > > 
> > > > > 
> > > > > Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=135561
> > > > > Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=186181
> > > > > Signed-off-by: Zhang Rui <rui.zhang@xxxxxxxxx>
> > > > > ---
> > > > >  drivers/hid/hid-core.c          | 2 ++
> > > > >  drivers/hid/hid-ids.h           | 1 +
> > > > >  drivers/hid/hid-microsoft.c     | 2 ++
> > > > >  drivers/hid/usbhid/hid-quirks.c | 1 +
> > > > >  4 files changed, 6 insertions(+)
> > > > > 
> > > > > diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
> > > > > index 2b89c70..3c4085d 100644
> > > > > --- a/drivers/hid/hid-core.c
> > > > > +++ b/drivers/hid/hid-core.c
> > > > > @@ -728,6 +728,7 @@ static void hid_scan_collection(struct
> > > > > hid_parser *parser, unsigned type)
> > > > >  	     hid->product ==
> > > > > USB_DEVICE_ID_MS_TYPE_COVER_PRO_3_2
> > > > > > 
> > > > > > > 
> > > > > > > 
> > > > >  	     hid->product ==
> > > > > USB_DEVICE_ID_MS_TYPE_COVER_PRO_3_JP
> > > > > > 
> > > > > > > 
> > > > > > > 
> > > > >  	     hid->product ==
> > > > > USB_DEVICE_ID_MS_TYPE_COVER_PRO_4_JP
> > > > > > 
> > > > > > > 
> > > > > > > 
> > > > > +	     hid->product ==
> > > > > USB_DEVICE_ID_MS_TYPE_COVER_PRO_4_1
> > > > > > 
> > > > > > > 
> > > > > > > 
> > > > >  	     hid->product == USB_DEVICE_ID_MS_TYPE_COVER_3 ||
> > > > >  	     hid->product == USB_DEVICE_ID_MS_POWER_COVER) &&
> > > > >  	    hid->group == HID_GROUP_MULTITOUCH)
> > > > > @@ -1984,6 +1985,7 @@ static const struct hid_device_id
> > > > > hid_have_special_driver[] = {
> > > > >  	{ HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT,
> > > > > USB_DEVICE_ID_MS_TYPE_COVER_PRO_3_2) },
> > > > >  	{ HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT,
> > > > > USB_DEVICE_ID_MS_TYPE_COVER_PRO_3_JP) },
> > > > >  	{ HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT,
> > > > > USB_DEVICE_ID_MS_TYPE_COVER_PRO_4_JP) },
> > > > > +	{ HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT,
> > > > > USB_DEVICE_ID_MS_TYPE_COVER_PRO_4_1) },
> > > > >  	{ HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT,
> > > > > USB_DEVICE_ID_MS_TYPE_COVER_3) },
> > > > >  	{ HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT,
> > > > > USB_DEVICE_ID_MS_DIGITAL_MEDIA_7K) },
> > > > >  	{ HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT,
> > > > > USB_DEVICE_ID_MS_DIGITAL_MEDIA_600) },
> > > > > diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
> > > > > index 575aa65..fe19866 100644
> > > > > --- a/drivers/hid/hid-ids.h
> > > > > +++ b/drivers/hid/hid-ids.h
> > > > > @@ -719,6 +719,7 @@
> > > > >  #define USB_DEVICE_ID_MS_TYPE_COVER_PRO_3_2  0x07e2
> > > > >  #define USB_DEVICE_ID_MS_TYPE_COVER_PRO_3_JP 0x07dd
> > > > >  #define USB_DEVICE_ID_MS_TYPE_COVER_PRO_4_JP 0x07e9
> > > > > +#define USB_DEVICE_ID_MS_TYPE_COVER_PRO_4_1 0x07e8
> > > > >  #define USB_DEVICE_ID_MS_TYPE_COVER_3    0x07de
> > > > >  #define USB_DEVICE_ID_MS_POWER_COVER     0x07da
> > > > >  
> > > > > diff --git a/drivers/hid/hid-microsoft.c b/drivers/hid/hid-
> > > > > microsoft.c
> > > > > index c6cd392..df06e6c 100644
> > > > > --- a/drivers/hid/hid-microsoft.c
> > > > > +++ b/drivers/hid/hid-microsoft.c
> > > > > @@ -282,6 +282,8 @@ static const struct hid_device_id
> > > > > ms_devices[]
> > > > > = {
> > > > >  		.driver_data = MS_HIDINPUT },
> > > > >  	{ HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT,
> > > > > USB_DEVICE_ID_MS_TYPE_COVER_PRO_4_JP),
> > > > >  		.driver_data = MS_HIDINPUT },
> > > > > +	{ HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT,
> > > > > USB_DEVICE_ID_MS_TYPE_COVER_PRO_4_1),
> > > > > +		.driver_data = MS_HIDINPUT },
> > > > >  	{ HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT,
> > > > > USB_DEVICE_ID_MS_TYPE_COVER_3),
> > > > >  		.driver_data = MS_HIDINPUT },
> > > > >  	{ HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT,
> > > > > USB_DEVICE_ID_MS_POWER_COVER),
> > > > > diff --git a/drivers/hid/usbhid/hid-quirks.c
> > > > > b/drivers/hid/usbhid/hid-quirks.c
> > > > > index e6cfd32..48d0ce8 100644
> > > > > --- a/drivers/hid/usbhid/hid-quirks.c
> > > > > +++ b/drivers/hid/usbhid/hid-quirks.c
> > > > > @@ -102,6 +102,7 @@ static const struct hid_blacklist {
> > > > >  	{ USB_VENDOR_ID_MICROSOFT,
> > > > > USB_DEVICE_ID_MS_TYPE_COVER_PRO_3_2, HID_QUIRK_NO_INIT_REPORTS
> > > > > },
> > > > >  	{ USB_VENDOR_ID_MICROSOFT,
> > > > > USB_DEVICE_ID_MS_TYPE_COVER_PRO_3_JP, HID_QUIRK_NO_INIT_REPORTS
> > > > > },
> > > > >  	{ USB_VENDOR_ID_MICROSOFT,
> > > > > USB_DEVICE_ID_MS_TYPE_COVER_PRO_4_JP, HID_QUIRK_NO_INIT_REPORTS
> > > > > },
> > > > > +	{ USB_VENDOR_ID_MICROSOFT,
> > > > > USB_DEVICE_ID_MS_TYPE_COVER_PRO_4_1, HID_QUIRK_NO_INIT_REPORTS
> > > > > },
> > > > >  	{ USB_VENDOR_ID_MICROSOFT,
> > > > > USB_DEVICE_ID_MS_TYPE_COVER_3,
> > > > > HID_QUIRK_NO_INIT_REPORTS },
> > > > >  	{ USB_VENDOR_ID_MICROSOFT,
> > > > > USB_DEVICE_ID_MS_POWER_COVER,
> > > > > HID_QUIRK_NO_INIT_REPORTS },
> > > > >  	{ USB_VENDOR_ID_MSI,
> > > > > USB_DEVICE_ID_MSI_GT683R_LED_PANEL,
> > > > > HID_QUIRK_NO_INIT_REPORTS },
> > > > > -- 
> > > > > 2.7.4
> > > > > 
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