Commit 7d0b18cd authored by Emanuele Ghidoli's avatar Emanuele Ghidoli Committed by Dmitry Torokhov
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Input: ilitek_ts_i2c - avoid wrong input subsystem sync 



For different reasons i2c transaction may fail or report id in the
message may be wrong. Avoid closing the frame in this case as it will
result in all contacts being dropped, indicating that nothing is
touching the screen anymore, while usually it is not the case.

Fixes: 42370681 ("Input: Add support for ILITEK Lego Series")
Signed-off-by: default avatarEmanuele Ghidoli <emanuele.ghidoli@toradex.com>
Signed-off-by: default avatarFrancesco Dolcini <francesco.dolcini@toradex.com>
Link: https://lore.kernel.org/r/20240805085511.43955-2-francesco@dolcini.it


Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
parent 14d650fc

drivers/input/touchscreen/ilitek_ts_i2c.c

+5 −6
Original line number Diff line number Diff line
@@ -160,15 +160,14 @@ static int ilitek_process_and_report_v6(struct ilitek_ts_data *ts) 
	error = ilitek_i2c_write_and_read(ts, NULL, 0, 0, buf, 64);

	if (error) {

		dev_err(dev, "get touch info failed, err:%d\n", error);

		goto err_sync_frame;

		return error;

	}



	report_max_point = buf[REPORT_COUNT_ADDRESS];

	if (report_max_point > ts->max_tp) {

		dev_err(dev, "FW report max point:%d > panel info. max:%d\n",

			report_max_point, ts->max_tp);

		error = -EINVAL;

		goto err_sync_frame;

		return -EINVAL;

	}



	count = DIV_ROUND_UP(report_max_point, packet_max_point);
@@ -178,7 +177,7 @@ static int ilitek_process_and_report_v6(struct ilitek_ts_data *ts) 
		if (error) {

			dev_err(dev, "get touch info. failed, cnt:%d, err:%d\n",

				count, error);

			goto err_sync_frame;

			return error;

		}

	}
@@ -203,10 +202,10 @@ static int ilitek_process_and_report_v6(struct ilitek_ts_data *ts) 
		ilitek_touch_down(ts, id, x, y);

	}



err_sync_frame:

	input_mt_sync_frame(input);

	input_sync(input);

	return error;



	return 0;

}



/* APIs of cmds for ILITEK Touch IC */