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drivers: input: vs1838b: Add noise filter for IR signals

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Adds logic to shift out the first edge if the initial three edges do not
match a leading burst, improving noise resilience
in the IR input signal processing.

Signed-off-by: Atakan Demirtaş <atakan_demirtas@outlook.com>
This commit is contained in:
Atakan Demirtaş
2025-11-14 20:32:54 +03:00
committed by Johan Hedberg
parent 5f72e95b60
commit 20337689a1
1 changed files with 9 additions and 0 deletions
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9
drivers/input/input_vs1838b.c
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@@ -315,6 +315,15 @@ static void vs1838b_input_callback(struct device const *dev, struct gpio_callbac
data->edges_ticks[data->edges_count++] = tick;
}
/* If the first 3 edges do not match a leading burst,
* shift left the edges_ticks to get rid of leading noises.
*/
if ((data->edges_count == 3) && !detect_leading_burst(data->edges_ticks)) {
data->edges_ticks[0] = data->edges_ticks[1];
data->edges_ticks[1] = data->edges_ticks[2];
data->edges_count = 2;
}
if (data->edges_count == NEC_SINGLE_COMMAND_EDGES_COUNT) {
/* There's a candidate!
* If nothing gets in during the grace period