From ad48cf5e9597147bb2bb526a6d379ee88970dec8 Mon Sep 17 00:00:00 2001 From: Karsten Merker Date: Thu, 17 Dec 2015 17:02:53 -0800 Subject: Input: goodix - add axis swapping and axis inversion support Implement support for the following device-tree and ACPI 5.1 DSD properties in the goodix touchscreen driver: - touchscreen-inverted-x: X axis is inverted (boolean) - touchscreen-inverted-y: Y axis is inverted (boolean) - touchscreen-swapped-x-y: X and Y axis are swapped (boolean) These are necessary on tablets which have a display in portrait format while the touchscreen is in landscape format, such as e.g. the MSI Primo 81. Signed-off-by: Karsten Merker Tested-by: Bastien Nocera Tested-by: Irina Tirdea (with ACPI DSD properties) Tested-by: Aleksei Mamlin (with device-tree properties) Acked-by: Rob Herring Signed-off-by: Dmitry Torokhov --- drivers/input/touchscreen/goodix.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) (limited to 'drivers/input') diff --git a/drivers/input/touchscreen/goodix.c b/drivers/input/touchscreen/goodix.c index 0acefe49540d..b5e910a44cdf 100644 --- a/drivers/input/touchscreen/goodix.c +++ b/drivers/input/touchscreen/goodix.c @@ -2,6 +2,7 @@ * Driver for Goodix Touchscreens * * Copyright (c) 2014 Red Hat Inc. + * Copyright (c) 2015 K. Merker * * This code is based on gt9xx.c authored by andrew@goodix.com: * @@ -35,6 +36,9 @@ struct goodix_ts_data { struct input_dev *input_dev; int abs_x_max; int abs_y_max; + bool swapped_x_y; + bool inverted_x; + bool inverted_y; unsigned int max_touch_num; unsigned int int_trigger_type; bool rotated_screen; @@ -235,6 +239,14 @@ static void goodix_ts_report_touch(struct goodix_ts_data *ts, u8 *coor_data) input_y = ts->abs_y_max - input_y; } + /* Inversions have to happen before axis swapping */ + if (ts->inverted_x) + input_x = ts->abs_x_max - input_x; + if (ts->inverted_y) + input_y = ts->abs_y_max - input_y; + if (ts->swapped_x_y) + swap(input_x, input_y); + input_mt_slot(ts->input_dev, id); input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true); input_report_abs(ts->input_dev, ABS_MT_POSITION_X, input_x); @@ -486,6 +498,8 @@ static void goodix_read_config(struct goodix_ts_data *ts) error); ts->abs_x_max = GOODIX_MAX_WIDTH; ts->abs_y_max = GOODIX_MAX_HEIGHT; + if (ts->swapped_x_y) + swap(ts->abs_x_max, ts->abs_y_max); ts->int_trigger_type = GOODIX_INT_TRIGGER; ts->max_touch_num = GOODIX_MAX_CONTACTS; return; @@ -493,6 +507,8 @@ static void goodix_read_config(struct goodix_ts_data *ts) ts->abs_x_max = get_unaligned_le16(&config[RESOLUTION_LOC]); ts->abs_y_max = get_unaligned_le16(&config[RESOLUTION_LOC + 2]); + if (ts->swapped_x_y) + swap(ts->abs_x_max, ts->abs_y_max); ts->int_trigger_type = config[TRIGGER_LOC] & 0x03; ts->max_touch_num = config[MAX_CONTACTS_LOC] & 0x0f; if (!ts->abs_x_max || !ts->abs_y_max || !ts->max_touch_num) { @@ -500,6 +516,8 @@ static void goodix_read_config(struct goodix_ts_data *ts) "Invalid config, using defaults\n"); ts->abs_x_max = GOODIX_MAX_WIDTH; ts->abs_y_max = GOODIX_MAX_HEIGHT; + if (ts->swapped_x_y) + swap(ts->abs_x_max, ts->abs_y_max); ts->max_touch_num = GOODIX_MAX_CONTACTS; } @@ -622,6 +640,13 @@ static int goodix_configure_dev(struct goodix_ts_data *ts) { int error; + ts->swapped_x_y = device_property_read_bool(&ts->client->dev, + "touchscreen-swapped-x-y"); + ts->inverted_x = device_property_read_bool(&ts->client->dev, + "touchscreen-inverted-x"); + ts->inverted_y = device_property_read_bool(&ts->client->dev, + "touchscreen-inverted-y"); + goodix_read_config(ts); error = goodix_request_input_dev(ts); -- cgit 1.4.1