Messages in this thread | | | Date | Sat, 20 Aug 2022 19:45:42 -0400 | Subject | Re: PROBLEM: Regression likely in hid_uclogic driver breaks Huion Inspiroy H640 drawing tablet | From | Stefan Hansson <> |
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> FWIW, I found the issue: the hid-uclogic driver is emitting input data > behind hid-input, and the state between the 2 is desynchronized. > > The following patch seems to be working (with the Huion v1 protocol I > have here that I have tweaked to resemble a v2): > --- > From aeedd318e6cb4dbee551f67616302cc7c4308c58 Mon Sep 17 00:00:00 2001 > From: Benjamin Tissoires <benjamin.tissoires@redhat.com> > Date: Thu, 18 Aug 2022 15:09:25 +0200 > Subject: [PATCH] Fix uclogic > > --- > drivers/hid/hid-input.c | 5 ++++- > 1 file changed, 4 insertions(+), 1 deletion(-) > > diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c > index c6b27aab9041..a3e2397bb3a7 100644 > --- a/drivers/hid/hid-input.c > +++ b/drivers/hid/hid-input.c > @@ -1530,7 +1530,10 @@ void hidinput_hid_event(struct hid_device *hid, > struct hid_field *field, struct > * assume ours > */ > if (!report->tool) > - hid_report_set_tool(report, input, usage->code); > + report->tool = usage->code; > + > + /* drivers may have changed the value behind our back, > resend it */ > + hid_report_set_tool(report, input, report->tool); > } else { > hid_report_release_tool(report, input, usage->code); > }
What branch should this be applied on top of?
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