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45 lines
1.4 KiB
Diff
45 lines
1.4 KiB
Diff
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From 037324a6b9f331943f246fdf39c4ae58a6e8f287 Mon Sep 17 00:00:00 2001
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From: Dave Stevenson <dave.stevenson@raspberrypi.com>
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Date: Tue, 30 Nov 2021 17:28:50 +0000
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Subject: [PATCH] input: edt-ft5x06: Only look at the number of points
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reported
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Register 0x02 in the FT5x06 is TD_STATUS containing the number
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of valid touch points being reported.
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Iterate over that number of points rather than all that are
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supported on the device.
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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 | 9 ++++++++-
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1 file changed, 8 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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@@ -212,6 +212,7 @@ static irqreturn_t edt_ft5x06_ts_isr(int
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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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+ unsigned int num_points;
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switch (tsdata->version) {
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case EDT_M06:
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@@ -260,9 +261,15 @@ static irqreturn_t edt_ft5x06_ts_isr(int
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if (!edt_ft5x06_ts_check_crc(tsdata, rdbuf, datalen))
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goto out;
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+ num_points = tsdata->max_support_points;
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+ } else {
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+ /* Register 2 is TD_STATUS, containing the number of touch
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+ * points.
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+ */
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+ num_points = min(rdbuf[2] & 0xf, tsdata->max_support_points);
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}
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- for (i = 0; i < tsdata->max_support_points; i++) {
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+ for (i = 0; i < num_points; i++) {
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u8 *buf = &rdbuf[i * tplen + offset];
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type = buf[0] >> 6;
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