From b58ba1ba1af9cfbad6f3af4c4fc3575d9aeae542 Mon Sep 17 00:00:00 2001 From: Jason Gerecke Date: Fri, 5 Dec 2014 13:37:32 -0800 Subject: [PATCH] HID: wacom: Initialize MT slots for generic devices at post_parse_hid If a HID descriptor places HID_DG_CONTACTID before HID_DG_X and HID_DG_Y then the ABS_X and ABS_Y will not be automatically initialized by the call to input_mt_init_slots. To ensure that this is not a problem, we relocate that call to occur after HID parsing has been completed and we've initalized all the multitouch axes. Signed-off-by: Jason Gerecke Reviewed-by: Benjamin Tissoires Signed-off-by: Jiri Kosina --- drivers/hid/wacom_sys.c | 18 ++++++++++++++++++ drivers/hid/wacom_wac.c | 3 --- 2 files changed, 18 insertions(+), 3 deletions(-) diff --git a/drivers/hid/wacom_sys.c b/drivers/hid/wacom_sys.c index eb5531657e41..872aa0be2e70 100644 --- a/drivers/hid/wacom_sys.c +++ b/drivers/hid/wacom_sys.c @@ -13,6 +13,7 @@ #include "wacom_wac.h" #include "wacom.h" +#include #define WAC_MSG_RETRIES 5 @@ -236,6 +237,21 @@ static void wacom_usage_mapping(struct hid_device *hdev, wacom_wac_usage_mapping(hdev, field, usage); } +static void wacom_post_parse_hid(struct hid_device *hdev, + struct wacom_features *features) +{ + struct wacom *wacom = hid_get_drvdata(hdev); + struct wacom_wac *wacom_wac = &wacom->wacom_wac; + + if (features->type == HID_GENERIC) { + /* Any last-minute generic device setup */ + if (features->touch_max > 1) { + input_mt_init_slots(wacom_wac->input, wacom_wac->features.touch_max, + INPUT_MT_DIRECT); + } + } +} + static void wacom_parse_hid(struct hid_device *hdev, struct wacom_features *features) { @@ -270,6 +286,8 @@ static void wacom_parse_hid(struct hid_device *hdev, wacom_usage_mapping(hdev, hreport->field[i], hreport->field[i]->usage + j); } + + wacom_post_parse_hid(hdev, features); } static int wacom_hid_set_device_mode(struct hid_device *hdev) diff --git a/drivers/hid/wacom_wac.c b/drivers/hid/wacom_wac.c index 7b7a61a9194d..064fd6cf36c6 100644 --- a/drivers/hid/wacom_wac.c +++ b/drivers/hid/wacom_wac.c @@ -1381,7 +1381,6 @@ static void wacom_wac_finger_usage_mapping(struct hid_device *hdev, { struct wacom *wacom = hid_get_drvdata(hdev); struct wacom_wac *wacom_wac = &wacom->wacom_wac; - struct input_dev *input = wacom_wac->input; unsigned touch_max = wacom_wac->features.touch_max; switch (usage->hid) { @@ -1400,8 +1399,6 @@ static void wacom_wac_finger_usage_mapping(struct hid_device *hdev, ABS_MT_POSITION_Y, 4); break; case HID_DG_CONTACTID: - input_mt_init_slots(input, wacom_wac->features.touch_max, - INPUT_MT_DIRECT); break; case HID_DG_INRANGE: break; -- 2.20.1