From bef7e200065086e2ceef091f6853f3b053ad2ba9 Mon Sep 17 00:00:00 2001 From: Jason Gerecke Date: Fri, 22 Apr 2016 14:30:53 -0700 Subject: [PATCH] HID: wacom: Add fuzz factor to distance and tilt axes The fuzz present on the distance and tilt axes is noticable when a puck is present, and userspace (specifically libinput) would like the ability to filter out the noise. To facilitate this, we assign a fuzz value of '1' for the distance and tilt axes. This is large enough to cover most of the natural variation in distance value as the puck is moved around, and enough to cover the jitter in rotation (reported through tilt axes) when the puck is left alone. Signed-off-by: Jason Gerecke Signed-off-by: Jiri Kosina --- drivers/hid/wacom_sys.c | 3 ++- drivers/hid/wacom_wac.c | 13 +++++++------ drivers/hid/wacom_wac.h | 1 + 3 files changed, 10 insertions(+), 7 deletions(-) diff --git a/drivers/hid/wacom_sys.c b/drivers/hid/wacom_sys.c index ccf1883318c3..499cc8213cfe 100644 --- a/drivers/hid/wacom_sys.c +++ b/drivers/hid/wacom_sys.c @@ -493,7 +493,8 @@ static void wacom_retrieve_hid_descriptor(struct hid_device *hdev, features->x_fuzz = 4; features->y_fuzz = 4; features->pressure_fuzz = 0; - features->distance_fuzz = 0; + features->distance_fuzz = 1; + features->tilt_fuzz = 1; /* * The wireless device HID is basic and layout conflicts with diff --git a/drivers/hid/wacom_wac.c b/drivers/hid/wacom_wac.c index 02c4efea241c..ea949cb2ec1e 100644 --- a/drivers/hid/wacom_wac.c +++ b/drivers/hid/wacom_wac.c @@ -2343,12 +2343,13 @@ static void wacom_setup_basic_pro_pen(struct wacom_wac *wacom_wac) __set_bit(BTN_STYLUS2, input_dev->keybit); input_set_abs_params(input_dev, ABS_DISTANCE, - 0, wacom_wac->features.distance_max, 0, 0); + 0, wacom_wac->features.distance_max, wacom_wac->features.distance_fuzz, 0); } static void wacom_setup_cintiq(struct wacom_wac *wacom_wac) { struct input_dev *input_dev = wacom_wac->pen_input; + struct wacom_features *features = &wacom_wac->features; wacom_setup_basic_pro_pen(wacom_wac); @@ -2358,9 +2359,9 @@ static void wacom_setup_cintiq(struct wacom_wac *wacom_wac) __set_bit(BTN_TOOL_AIRBRUSH, input_dev->keybit); input_set_abs_params(input_dev, ABS_WHEEL, 0, 1023, 0, 0); - input_set_abs_params(input_dev, ABS_TILT_X, -64, 63, 0, 0); + input_set_abs_params(input_dev, ABS_TILT_X, -64, 63, features->tilt_fuzz, 0); input_abs_set_res(input_dev, ABS_TILT_X, 57); - input_set_abs_params(input_dev, ABS_TILT_Y, -64, 63, 0, 0); + input_set_abs_params(input_dev, ABS_TILT_Y, -64, 63, features->tilt_fuzz, 0); input_abs_set_res(input_dev, ABS_TILT_Y, 57); } @@ -2506,7 +2507,7 @@ int wacom_setup_pen_input_capabilities(struct input_dev *input_dev, case WACOM_G4: input_set_abs_params(input_dev, ABS_DISTANCE, 0, features->distance_max, - 0, 0); + features->distance_fuzz, 0); /* fall through */ case GRAPHIRE: @@ -2568,7 +2569,7 @@ int wacom_setup_pen_input_capabilities(struct input_dev *input_dev, input_set_abs_params(input_dev, ABS_DISTANCE, 0, features->distance_max, - 0, 0); + features->distance_fuzz, 0); input_set_abs_params(input_dev, ABS_Z, -900, 899, 0, 0); input_abs_set_res(input_dev, ABS_Z, 287); @@ -2627,7 +2628,7 @@ int wacom_setup_pen_input_capabilities(struct input_dev *input_dev, __set_bit(BTN_STYLUS2, input_dev->keybit); input_set_abs_params(input_dev, ABS_DISTANCE, 0, features->distance_max, - 0, 0); + features->distance_fuzz, 0); } break; case BAMBOO_PAD: diff --git a/drivers/hid/wacom_wac.h b/drivers/hid/wacom_wac.h index e2084d914c14..53d16537fd2a 100644 --- a/drivers/hid/wacom_wac.h +++ b/drivers/hid/wacom_wac.h @@ -177,6 +177,7 @@ struct wacom_features { int y_fuzz; int pressure_fuzz; int distance_fuzz; + int tilt_fuzz; unsigned quirks; unsigned touch_max; int oVid; -- 2.20.1