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// SPDX-License-Identifier: GPL-2.0-or-later
// SPDX-FileCopyrightText: 2024 Kent Gibson <warthog618@gmail.com>
#include <glib.h>
#include <gpiod.h>
#include <poll.h>
#include <gpiod-test.h>
#include <gpiod-test-common.h>
#include <gpiosim-glib.h>
#include "helpers.h"
#define GPIOD_TEST_GROUP "kernel-uapi"
static gpointer falling_and_rising_edge_events(gpointer data)
{
GPIOSimChip *sim = data;
/*
* needs to be as long as several system timer ticks or resulting
* pulse width is unreliable and may get filtered by debounce.
*/
g_usleep(50000);
g_gpiosim_chip_set_pull(sim, 2, G_GPIOSIM_PULL_UP);
g_usleep(50000);
g_gpiosim_chip_set_pull(sim, 2, G_GPIOSIM_PULL_DOWN);
return NULL;
}
GPIOD_TEST_CASE(enable_debounce_then_edge_detection)
{
static const guint offset = 2;
g_autoptr(GPIOSimChip) sim = g_gpiosim_chip_new("num-lines", 8, NULL);
g_autoptr(struct_gpiod_chip) chip = NULL;
g_autoptr(struct_gpiod_line_settings) settings = NULL;
g_autoptr(struct_gpiod_line_config) line_cfg = NULL;
g_autoptr(struct_gpiod_line_request) request = NULL;
g_autoptr(GThread) thread = NULL;
g_autoptr(struct_gpiod_edge_event_buffer) buffer = NULL;
struct gpiod_edge_event *event;
guint64 ts_rising, ts_falling;
gint ret;
chip = gpiod_test_open_chip_or_fail(g_gpiosim_chip_get_dev_path(sim));
settings = gpiod_test_create_line_settings_or_fail();
line_cfg = gpiod_test_create_line_config_or_fail();
buffer = gpiod_test_create_edge_event_buffer_or_fail(64);
gpiod_line_settings_set_direction(settings, GPIOD_LINE_DIRECTION_INPUT);
gpiod_line_settings_set_debounce_period_us(settings, 10);
gpiod_test_line_config_add_line_settings_or_fail(line_cfg, &offset, 1,
settings);
request = gpiod_test_chip_request_lines_or_fail(chip, NULL, line_cfg);
gpiod_line_settings_set_edge_detection(settings, GPIOD_LINE_EDGE_BOTH);
gpiod_test_line_config_add_line_settings_or_fail(line_cfg, &offset, 1,
settings);
gpiod_test_line_request_reconfigure_lines_or_fail(request, line_cfg);
thread = g_thread_new("request-release",
falling_and_rising_edge_events, sim);
g_thread_ref(thread);
/* First event. */
ret = gpiod_line_request_wait_edge_events(request, 1000000000);
g_assert_cmpint(ret, >, 0);
gpiod_test_join_thread_and_return_if_failed(thread);
ret = gpiod_line_request_read_edge_events(request, buffer, 1);
g_assert_cmpint(ret, ==, 1);
gpiod_test_join_thread_and_return_if_failed(thread);
g_assert_cmpuint(gpiod_edge_event_buffer_get_num_events(buffer), ==, 1);
event = gpiod_edge_event_buffer_get_event(buffer, 0);
g_assert_nonnull(event);
gpiod_test_join_thread_and_return_if_failed(thread);
g_assert_cmpint(gpiod_edge_event_get_event_type(event), ==,
GPIOD_EDGE_EVENT_RISING_EDGE);
g_assert_cmpuint(gpiod_edge_event_get_line_offset(event), ==, 2);
ts_rising = gpiod_edge_event_get_timestamp_ns(event);
/* Second event. */
ret = gpiod_line_request_wait_edge_events(request, 1000000000);
g_assert_cmpint(ret, >, 0);
gpiod_test_join_thread_and_return_if_failed(thread);
ret = gpiod_line_request_read_edge_events(request, buffer, 1);
g_assert_cmpint(ret, ==, 1);
gpiod_test_join_thread_and_return_if_failed(thread);
g_assert_cmpuint(gpiod_edge_event_buffer_get_num_events(buffer), ==, 1);
event = gpiod_edge_event_buffer_get_event(buffer, 0);
g_assert_nonnull(event);
gpiod_test_join_thread_and_return_if_failed(thread);
g_assert_cmpint(gpiod_edge_event_get_event_type(event), ==,
GPIOD_EDGE_EVENT_FALLING_EDGE);
g_assert_cmpuint(gpiod_edge_event_get_line_offset(event), ==, 2);
ts_falling = gpiod_edge_event_get_timestamp_ns(event);
g_thread_join(thread);
g_assert_cmpuint(ts_falling, >, ts_rising);
}
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