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64 lines
2.0 KiB
Diff
64 lines
2.0 KiB
Diff
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From 7b658b57d05317656fec750eca1094049de41c76 Mon Sep 17 00:00:00 2001
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From: Dave Stevenson <dave.stevenson@raspberrypi.com>
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Date: Fri, 26 Nov 2021 14:37:40 +0000
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Subject: [PATCH] input: edt-ft5x06: Handle unreliable TOUCH_UP events
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The ft5x06 is unreliable in sending touch up events, so some
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touch IDs can become stuck in the detected state.
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Ensure that IDs that are unreported by the controller are
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released.
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Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
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---
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drivers/input/touchscreen/edt-ft5x06.c | 21 ++++++++++++++++++++-
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1 file changed, 20 insertions(+), 1 deletion(-)
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--- a/drivers/input/touchscreen/edt-ft5x06.c
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+++ b/drivers/input/touchscreen/edt-ft5x06.c
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@@ -127,6 +127,7 @@ struct edt_ft5x06_ts_data {
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int offset_y;
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int report_rate;
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int max_support_points;
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+ unsigned int known_ids;
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char name[EDT_NAME_LEN];
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@@ -201,6 +202,9 @@ static irqreturn_t edt_ft5x06_ts_isr(int
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int i, type, x, y, id;
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int offset, tplen, datalen, crclen;
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int error;
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+ unsigned int active_ids = 0, known_ids = tsdata->known_ids;
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+ long released_ids;
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+ int b = 0;
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switch (tsdata->version) {
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case EDT_M06:
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@@ -272,10 +276,25 @@ static irqreturn_t edt_ft5x06_ts_isr(int
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input_mt_slot(tsdata->input, id);
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if (input_mt_report_slot_state(tsdata->input, MT_TOOL_FINGER,
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- type != TOUCH_EVENT_UP))
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+ type != TOUCH_EVENT_UP)) {
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touchscreen_report_pos(tsdata->input, &tsdata->prop,
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x, y, true);
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+ active_ids |= BIT(id);
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+ } else {
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+ known_ids &= ~BIT(id);
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+ }
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+ }
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+
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+ /* One issue with the device is the TOUCH_UP message is not always
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+ * returned. Instead track which ids we know about and report when they
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+ * are no longer updated
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+ */
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+ released_ids = known_ids & ~active_ids;
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+ for_each_set_bit_from(b, &released_ids, tsdata->max_support_points) {
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+ input_mt_slot(tsdata->input, b);
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+ input_mt_report_slot_inactive(tsdata->input);
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}
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+ tsdata->known_ids = active_ids;
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input_mt_report_pointer_emulation(tsdata->input, true);
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input_sync(tsdata->input);
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