This is a note to let you know that I've just added the patch titled HID: wacom: Don't register pad_input for touch switch to the 5.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: hid-wacom-don-t-register-pad_input-for-touch-switch.patch and it can be found in the queue-5.15 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From d6b675687a4ab4dba684716d97c8c6f81bf10905 Mon Sep 17 00:00:00 2001 From: Ping Cheng <pinglinux@xxxxxxxxx> Date: Fri, 13 May 2022 14:52:37 -0700 Subject: HID: wacom: Don't register pad_input for touch switch From: Ping Cheng <pinglinux@xxxxxxxxx> commit d6b675687a4ab4dba684716d97c8c6f81bf10905 upstream. Touch switch state is received through WACOM_PAD_FIELD. However, it is reported by touch_input. Don't register pad_input if no other pad events require the interface. Cc: stable@xxxxxxxxxxxxxxx Signed-off-by: Ping Cheng <ping.cheng@xxxxxxxxx> Reviewed-by: Jason Gerecke <jason.gerecke@xxxxxxxxx> Signed-off-by: Jiri Kosina <jkosina@xxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/hid/wacom_sys.c | 2 +- drivers/hid/wacom_wac.c | 43 +++++++++++++++++++++++++------------------ 2 files changed, 26 insertions(+), 19 deletions(-) --- a/drivers/hid/wacom_sys.c +++ b/drivers/hid/wacom_sys.c @@ -2124,7 +2124,7 @@ static int wacom_register_inputs(struct error = wacom_setup_pad_input_capabilities(pad_input_dev, wacom_wac); if (error) { - /* no pad in use on this interface */ + /* no pad events using this interface */ input_free_device(pad_input_dev); wacom_wac->pad_input = NULL; pad_input_dev = NULL; --- a/drivers/hid/wacom_wac.c +++ b/drivers/hid/wacom_wac.c @@ -2017,7 +2017,6 @@ static void wacom_wac_pad_usage_mapping( wacom_wac->has_mute_touch_switch = true; usage->type = EV_SW; usage->code = SW_MUTE_DEVICE; - features->device_type |= WACOM_DEVICETYPE_PAD; break; case WACOM_HID_WD_TOUCHSTRIP: wacom_map_usage(input, usage, field, EV_ABS, ABS_RX, 0); @@ -2097,6 +2096,30 @@ static void wacom_wac_pad_event(struct h wacom_wac->hid_data.inrange_state |= value; } + /* Process touch switch state first since it is reported through touch interface, + * which is indepentent of pad interface. In the case when there are no other pad + * events, the pad interface will not even be created. + */ + if ((equivalent_usage == WACOM_HID_WD_MUTE_DEVICE) || + (equivalent_usage == WACOM_HID_WD_TOUCHONOFF)) { + if (wacom_wac->shared->touch_input) { + bool *is_touch_on = &wacom_wac->shared->is_touch_on; + + if (equivalent_usage == WACOM_HID_WD_MUTE_DEVICE && value) + *is_touch_on = !(*is_touch_on); + else if (equivalent_usage == WACOM_HID_WD_TOUCHONOFF) + *is_touch_on = value; + + input_report_switch(wacom_wac->shared->touch_input, + SW_MUTE_DEVICE, !(*is_touch_on)); + input_sync(wacom_wac->shared->touch_input); + } + return; + } + + if (!input) + return; + switch (equivalent_usage) { case WACOM_HID_WD_TOUCHRING: /* @@ -2132,22 +2155,6 @@ static void wacom_wac_pad_event(struct h input_event(input, usage->type, usage->code, 0); break; - case WACOM_HID_WD_MUTE_DEVICE: - case WACOM_HID_WD_TOUCHONOFF: - if (wacom_wac->shared->touch_input) { - bool *is_touch_on = &wacom_wac->shared->is_touch_on; - - if (equivalent_usage == WACOM_HID_WD_MUTE_DEVICE && value) - *is_touch_on = !(*is_touch_on); - else if (equivalent_usage == WACOM_HID_WD_TOUCHONOFF) - *is_touch_on = value; - - input_report_switch(wacom_wac->shared->touch_input, - SW_MUTE_DEVICE, !(*is_touch_on)); - input_sync(wacom_wac->shared->touch_input); - } - break; - case WACOM_HID_WD_MODE_CHANGE: if (wacom_wac->is_direct_mode != value) { wacom_wac->is_direct_mode = value; @@ -2808,7 +2815,7 @@ void wacom_wac_event(struct hid_device * /* usage tests must precede field tests */ if (WACOM_BATTERY_USAGE(usage)) wacom_wac_battery_event(hdev, field, usage, value); - else if (WACOM_PAD_FIELD(field) && wacom->wacom_wac.pad_input) + else if (WACOM_PAD_FIELD(field)) wacom_wac_pad_event(hdev, field, usage, value); else if (WACOM_PEN_FIELD(field) && wacom->wacom_wac.pen_input) wacom_wac_pen_event(hdev, field, usage, value); Patches currently in stable-queue which might be from pinglinux@xxxxxxxxx are queue-5.15/hid-wacom-don-t-register-pad_input-for-touch-switch.patch queue-5.15/hid-wacom-only-report-rotation-for-art-pen.patch