diff options
Diffstat (limited to 'drivers/hid/bpf/progs/Huion__Inspiroy-2-S.bpf.c')
| -rw-r--r-- | drivers/hid/bpf/progs/Huion__Inspiroy-2-S.bpf.c | 29 |
1 files changed, 27 insertions, 2 deletions
diff --git a/drivers/hid/bpf/progs/Huion__Inspiroy-2-S.bpf.c b/drivers/hid/bpf/progs/Huion__Inspiroy-2-S.bpf.c index 13f64fb49800..79453362bf97 100644 --- a/drivers/hid/bpf/progs/Huion__Inspiroy-2-S.bpf.c +++ b/drivers/hid/bpf/progs/Huion__Inspiroy-2-S.bpf.c @@ -163,6 +163,9 @@ char EXPECTED_FIRMWARE_ID[] = "HUION_T21j_"; __u8 last_button_state; +__u8 last_tip_state; +__u8 last_sec_barrel_state; +__u8 force_tip_down_count; static const __u8 fixed_rdesc_pad[] = { UsagePage_GenericDesktop @@ -522,9 +525,31 @@ int BPF_PROG(inspiroy_2_fix_events, struct hid_bpf_ctx *hctx) pad_report->wheel = wheel; return sizeof(struct pad_report); - } + } else if (data[1] & 0x80) { /* Pen reports with InRange 1 */ + __u8 tip_state = data[1] & 0x1; + __u8 sec_barrel_state = data[1] & 0x4; + + if (force_tip_down_count > 0) { + data[1] |= 0x1; + --force_tip_down_count; + if (tip_state) + force_tip_down_count = 0; + } - /* Pen reports need nothing done */ + /* Tip was down and we just pressed or released the + * secondary barrel switch (the physical eraser + * button). The device will send up to 4 + * reports with Tip Switch 0 and sometimes + * this report has Tip Switch 0. + */ + if (last_tip_state && + last_sec_barrel_state != sec_barrel_state) { + force_tip_down_count = 4; + data[1] |= 0x1; + } + last_tip_state = tip_state; + last_sec_barrel_state = sec_barrel_state; + } } return 0; |