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linux/tools/testing/selftests/alsa/mixer-test.c
Jaroslav Kysela b310092e3e selftests: alsa - move shared library configuration code to conf.c 
The minimal alsa-lib configuration code is similar in both mixer
and pcm tests. Move this code to the shared conf.c source file.

Also, fix the build rules inspired by rseq tests. Build libatest.so
which is linked to the both test utilities dynamically.

Also, set the TEST_FILES variable for lib.mk.

Cc: linux-kselftest@vger.kernel.org
Cc: Shuah Khan <shuah@kernel.org>
Reported-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Tested-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20221129085306.2345763-1-perex@perex.cz
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2022-11-29 15:05:18 +01:00

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// SPDX-License-Identifier: GPL-2.0
//
// kselftest for the ALSA mixer API
//
// Original author: Mark Brown <broonie@kernel.org>
// Copyright (c) 2021-2 Arm Limited
// This test will iterate over all cards detected in the system, exercising
// every mixer control it can find. This may conflict with other system
// software if there is audio activity so is best run on a system with a
// minimal active userspace.
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <limits.h>
#include <string.h>
#include <getopt.h>
#include <stdarg.h>
#include <ctype.h>
#include <math.h>
#include <errno.h>
#include <assert.h>
#include <alsa/asoundlib.h>
#include <poll.h>
#include <stdint.h>
#include "../kselftest.h"
#include "alsa-local.h"
#define TESTS_PER_CONTROL 7
struct card_data {
snd_ctl_t *handle;
int card;
struct pollfd pollfd;
int num_ctls;
snd_ctl_elem_list_t *ctls;
struct card_data *next;
};
struct ctl_data {
const char *name;
snd_ctl_elem_id_t *id;
snd_ctl_elem_info_t *info;
snd_ctl_elem_value_t *def_val;
int elem;
int event_missing;
int event_spurious;
struct card_data *card;
struct ctl_data *next;
};
int num_cards = 0;
int num_controls = 0;
struct card_data *card_list = NULL;
struct ctl_data *ctl_list = NULL;
static void find_controls(void)
{
char name[32];
int card, ctl, err;
struct card_data *card_data;
struct ctl_data *ctl_data;
snd_config_t *config;
card = -1;
if (snd_card_next(&card) < 0 || card < 0)
return;
config = get_alsalib_config();
while (card >= 0) {
sprintf(name, "hw:%d", card);
card_data = malloc(sizeof(*card_data));
if (!card_data)
ksft_exit_fail_msg("Out of memory\n");
err = snd_ctl_open_lconf(&card_data->handle, name, 0, config);
if (err < 0) {
ksft_print_msg("Failed to get hctl for card %d: %s\n",
card, snd_strerror(err));
goto next_card;
}
/* Count controls */
snd_ctl_elem_list_malloc(&card_data->ctls);
snd_ctl_elem_list(card_data->handle, card_data->ctls);
card_data->num_ctls = snd_ctl_elem_list_get_count(card_data->ctls);
/* Enumerate control information */
snd_ctl_elem_list_alloc_space(card_data->ctls, card_data->num_ctls);
snd_ctl_elem_list(card_data->handle, card_data->ctls);
card_data->card = num_cards++;
card_data->next = card_list;
card_list = card_data;
num_controls += card_data->num_ctls;
for (ctl = 0; ctl < card_data->num_ctls; ctl++) {
ctl_data = malloc(sizeof(*ctl_data));
if (!ctl_data)
ksft_exit_fail_msg("Out of memory\n");
memset(ctl_data, 0, sizeof(*ctl_data));
ctl_data->card = card_data;
ctl_data->elem = ctl;
ctl_data->name = snd_ctl_elem_list_get_name(card_data->ctls,
ctl);
err = snd_ctl_elem_id_malloc(&ctl_data->id);
if (err < 0)
ksft_exit_fail_msg("Out of memory\n");
err = snd_ctl_elem_info_malloc(&ctl_data->info);
if (err < 0)
ksft_exit_fail_msg("Out of memory\n");
err = snd_ctl_elem_value_malloc(&ctl_data->def_val);
if (err < 0)
ksft_exit_fail_msg("Out of memory\n");
snd_ctl_elem_list_get_id(card_data->ctls, ctl,
ctl_data->id);
snd_ctl_elem_info_set_id(ctl_data->info, ctl_data->id);
err = snd_ctl_elem_info(card_data->handle,
ctl_data->info);
if (err < 0) {
ksft_print_msg("%s getting info for %d\n",
snd_strerror(err),
ctl_data->name);
}
snd_ctl_elem_value_set_id(ctl_data->def_val,
ctl_data->id);
ctl_data->next = ctl_list;
ctl_list = ctl_data;
}
/* Set up for events */
err = snd_ctl_subscribe_events(card_data->handle, true);
if (err < 0) {
ksft_exit_fail_msg("snd_ctl_subscribe_events() failed for card %d: %d\n",
card, err);
}
err = snd_ctl_poll_descriptors_count(card_data->handle);
if (err != 1) {
ksft_exit_fail_msg("Unexpected descriptor count %d for card %d\n",
err, card);
}
err = snd_ctl_poll_descriptors(card_data->handle,
&card_data->pollfd, 1);
if (err != 1) {
ksft_exit_fail_msg("snd_ctl_poll_descriptors() failed for %d\n",
card, err);
}
next_card:
if (snd_card_next(&card) < 0) {
ksft_print_msg("snd_card_next");
break;
}
}
snd_config_delete(config);
}
/*
* Block for up to timeout ms for an event, returns a negative value
* on error, 0 for no event and 1 for an event.
*/
static int wait_for_event(struct ctl_data *ctl, int timeout)
{
unsigned short revents;
snd_ctl_event_t *event;
int count, err;
unsigned int mask = 0;
unsigned int ev_id;
snd_ctl_event_alloca(&event);
do {
err = poll(&(ctl->card->pollfd), 1, timeout);
if (err < 0) {
ksft_print_msg("poll() failed for %s: %s (%d)\n",
ctl->name, strerror(errno), errno);
return -1;
}
/* Timeout */
if (err == 0)
return 0;
err = snd_ctl_poll_descriptors_revents(ctl->card->handle,
&(ctl->card->pollfd),
1, &revents);
if (err < 0) {
ksft_print_msg("snd_ctl_poll_descriptors_revents() failed for %s: %d\n",
ctl->name, err);
return err;
}
if (revents & POLLERR) {
ksft_print_msg("snd_ctl_poll_descriptors_revents() reported POLLERR for %s\n",
ctl->name);
return -1;
}
/* No read events */
if (!(revents & POLLIN)) {
ksft_print_msg("No POLLIN\n");
continue;
}
err = snd_ctl_read(ctl->card->handle, event);
if (err < 0) {
ksft_print_msg("snd_ctl_read() failed for %s: %d\n",
ctl->name, err);
return err;
}
if (snd_ctl_event_get_type(event) != SND_CTL_EVENT_ELEM)
continue;
/* The ID returned from the event is 1 less than numid */
mask = snd_ctl_event_elem_get_mask(event);
ev_id = snd_ctl_event_elem_get_numid(event);
if (ev_id != snd_ctl_elem_info_get_numid(ctl->info)) {
ksft_print_msg("Event for unexpected ctl %s\n",
snd_ctl_event_elem_get_name(event));
continue;
}
if ((mask & SND_CTL_EVENT_MASK_REMOVE) == SND_CTL_EVENT_MASK_REMOVE) {
ksft_print_msg("Removal event for %s\n",
ctl->name);
return -1;
}
} while ((mask & SND_CTL_EVENT_MASK_VALUE) != SND_CTL_EVENT_MASK_VALUE);
return 1;
}
static bool ctl_value_index_valid(struct ctl_data *ctl,
snd_ctl_elem_value_t *val,
int index)
{
long int_val;
long long int64_val;
switch (snd_ctl_elem_info_get_type(ctl->info)) {
case SND_CTL_ELEM_TYPE_NONE:
ksft_print_msg("%s.%d Invalid control type NONE\n",
ctl->name, index);
return false;
case SND_CTL_ELEM_TYPE_BOOLEAN:
int_val = snd_ctl_elem_value_get_boolean(val, index);
switch (int_val) {
case 0:
case 1:
break;
default:
ksft_print_msg("%s.%d Invalid boolean value %ld\n",
ctl->name, index, int_val);
return false;
}
break;
case SND_CTL_ELEM_TYPE_INTEGER:
int_val = snd_ctl_elem_value_get_integer(val, index);
if (int_val < snd_ctl_elem_info_get_min(ctl->info)) {
ksft_print_msg("%s.%d value %ld less than minimum %ld\n",
ctl->name, index, int_val,
snd_ctl_elem_info_get_min(ctl->info));
return false;
}
if (int_val > snd_ctl_elem_info_get_max(ctl->info)) {
ksft_print_msg("%s.%d value %ld more than maximum %ld\n",
ctl->name, index, int_val,
snd_ctl_elem_info_get_max(ctl->info));
return false;
}
/* Only check step size if there is one and we're in bounds */
if (snd_ctl_elem_info_get_step(ctl->info) &&
(int_val - snd_ctl_elem_info_get_min(ctl->info) %
snd_ctl_elem_info_get_step(ctl->info))) {
ksft_print_msg("%s.%d value %ld invalid for step %ld minimum %ld\n",
ctl->name, index, int_val,
snd_ctl_elem_info_get_step(ctl->info),
snd_ctl_elem_info_get_min(ctl->info));
return false;
}
break;
case SND_CTL_ELEM_TYPE_INTEGER64:
int64_val = snd_ctl_elem_value_get_integer64(val, index);
if (int64_val < snd_ctl_elem_info_get_min64(ctl->info)) {
ksft_print_msg("%s.%d value %lld less than minimum %lld\n",
ctl->name, index, int64_val,
snd_ctl_elem_info_get_min64(ctl->info));
return false;
}
if (int64_val > snd_ctl_elem_info_get_max64(ctl->info)) {
ksft_print_msg("%s.%d value %lld more than maximum %lld\n",
ctl->name, index, int64_val,
snd_ctl_elem_info_get_max(ctl->info));
return false;
}
/* Only check step size if there is one and we're in bounds */
if (snd_ctl_elem_info_get_step64(ctl->info) &&
(int64_val - snd_ctl_elem_info_get_min64(ctl->info)) %
snd_ctl_elem_info_get_step64(ctl->info)) {
ksft_print_msg("%s.%d value %lld invalid for step %lld minimum %lld\n",
ctl->name, index, int64_val,
snd_ctl_elem_info_get_step64(ctl->info),
snd_ctl_elem_info_get_min64(ctl->info));
return false;
}
break;
case SND_CTL_ELEM_TYPE_ENUMERATED:
int_val = snd_ctl_elem_value_get_enumerated(val, index);
if (int_val < 0) {
ksft_print_msg("%s.%d negative value %ld for enumeration\n",
ctl->name, index, int_val);
return false;
}
if (int_val >= snd_ctl_elem_info_get_items(ctl->info)) {
ksft_print_msg("%s.%d value %ld more than item count %ld\n",
ctl->name, index, int_val,
snd_ctl_elem_info_get_items(ctl->info));
return false;
}
break;
default:
/* No tests for other types */
break;
}
return true;
}
/*
* Check that the provided value meets the constraints for the
* provided control.
*/
static bool ctl_value_valid(struct ctl_data *ctl, snd_ctl_elem_value_t *val)
{
int i;
bool valid = true;
for (i = 0; i < snd_ctl_elem_info_get_count(ctl->info); i++)
if (!ctl_value_index_valid(ctl, val, i))
valid = false;
return valid;
}
/*
* Check that we can read the default value and it is valid. Write
* tests use the read value to restore the default.
*/
static void test_ctl_get_value(struct ctl_data *ctl)
{
int err;
/* If the control is turned off let's be polite */
if (snd_ctl_elem_info_is_inactive(ctl->info)) {
ksft_print_msg("%s is inactive\n", ctl->name);
ksft_test_result_skip("get_value.%d.%d\n",
ctl->card->card, ctl->elem);
return;
}
/* Can't test reading on an unreadable control */
if (!snd_ctl_elem_info_is_readable(ctl->info)) {
ksft_print_msg("%s is not readable\n", ctl->name);
ksft_test_result_skip("get_value.%d.%d\n",
ctl->card->card, ctl->elem);
return;
}
err = snd_ctl_elem_read(ctl->card->handle, ctl->def_val);
if (err < 0) {
ksft_print_msg("snd_ctl_elem_read() failed: %s\n",
snd_strerror(err));
goto out;
}
if (!ctl_value_valid(ctl, ctl->def_val))
err = -EINVAL;
out:
ksft_test_result(err >= 0, "get_value.%d.%d\n",
ctl->card->card, ctl->elem);
}
static bool strend(const char *haystack, const char *needle)
{
size_t haystack_len = strlen(haystack);
size_t needle_len = strlen(needle);
if (needle_len > haystack_len)
return false;
return strcmp(haystack + haystack_len - needle_len, needle) == 0;
}
static void test_ctl_name(struct ctl_data *ctl)
{
bool name_ok = true;
bool check;
/* Only boolean controls should end in Switch */
if (strend(ctl->name, " Switch")) {
if (snd_ctl_elem_info_get_type(ctl->info) != SND_CTL_ELEM_TYPE_BOOLEAN) {
ksft_print_msg("%d.%d %s ends in Switch but is not boolean\n",
ctl->card->card, ctl->elem, ctl->name);
name_ok = false;
}
}
/* Writeable boolean controls should end in Switch */
if (snd_ctl_elem_info_get_type(ctl->info) == SND_CTL_ELEM_TYPE_BOOLEAN &&
snd_ctl_elem_info_is_writable(ctl->info)) {
if (!strend(ctl->name, " Switch")) {
ksft_print_msg("%d.%d %s is a writeable boolean but not a Switch\n",
ctl->card->card, ctl->elem, ctl->name);
name_ok = false;
}
}
ksft_test_result(name_ok, "name.%d.%d\n",
ctl->card->card, ctl->elem);
}
static bool show_mismatch(struct ctl_data *ctl, int index,
snd_ctl_elem_value_t *read_val,
snd_ctl_elem_value_t *expected_val)
{
long long expected_int, read_int;
/*
* We factor out the code to compare values representable as
* integers, ensure that check doesn't log otherwise.
*/
expected_int = 0;
read_int = 0;
switch (snd_ctl_elem_info_get_type(ctl->info)) {
case SND_CTL_ELEM_TYPE_BOOLEAN:
expected_int = snd_ctl_elem_value_get_boolean(expected_val,
index);
read_int = snd_ctl_elem_value_get_boolean(read_val, index);
break;
case SND_CTL_ELEM_TYPE_INTEGER:
expected_int = snd_ctl_elem_value_get_integer(expected_val,
index);
read_int = snd_ctl_elem_value_get_integer(read_val, index);
break;
case SND_CTL_ELEM_TYPE_INTEGER64:
expected_int = snd_ctl_elem_value_get_integer64(expected_val,
index);
read_int = snd_ctl_elem_value_get_integer64(read_val,
index);
break;
case SND_CTL_ELEM_TYPE_ENUMERATED:
expected_int = snd_ctl_elem_value_get_enumerated(expected_val,
index);
read_int = snd_ctl_elem_value_get_enumerated(read_val,
index);
break;
default:
break;
}
if (expected_int != read_int) {
/*
* NOTE: The volatile attribute means that the hardware
* can voluntarily change the state of control element
* independent of any operation by software.
*/
bool is_volatile = snd_ctl_elem_info_is_volatile(ctl->info);
ksft_print_msg("%s.%d expected %lld but read %lld, is_volatile %d\n",
ctl->name, index, expected_int, read_int, is_volatile);
return !is_volatile;
} else {
return false;
}
}
/*
* Write a value then if possible verify that we get the expected
* result. An optional expected value can be provided if we expect
* the write to fail, for verifying that invalid writes don't corrupt
* anything.
*/
static int write_and_verify(struct ctl_data *ctl,
snd_ctl_elem_value_t *write_val,
snd_ctl_elem_value_t *expected_val)
{
int err, i;
bool error_expected, mismatch_shown;
snd_ctl_elem_value_t *initial_val, *read_val, *w_val;
snd_ctl_elem_value_alloca(&initial_val);
snd_ctl_elem_value_alloca(&read_val);
snd_ctl_elem_value_alloca(&w_val);
/*
* We need to copy the write value since writing can modify
* the value which causes surprises, and allocate an expected
* value if we expect to read back what we wrote.
*/
snd_ctl_elem_value_copy(w_val, write_val);
if (expected_val) {
error_expected = true;
} else {
error_expected = false;
snd_ctl_elem_value_alloca(&expected_val);
snd_ctl_elem_value_copy(expected_val, write_val);
}
/* Store the value before we write */
if (snd_ctl_elem_info_is_readable(ctl->info)) {
snd_ctl_elem_value_set_id(initial_val, ctl->id);
err = snd_ctl_elem_read(ctl->card->handle, initial_val);
if (err < 0) {
ksft_print_msg("snd_ctl_elem_read() failed: %s\n",
snd_strerror(err));
return err;
}
}
/*
* Do the write, if we have an expected value ignore the error
* and carry on to validate the expected value.
*/
err = snd_ctl_elem_write(ctl->card->handle, w_val);
if (err < 0 && !error_expected) {
ksft_print_msg("snd_ctl_elem_write() failed: %s\n",
snd_strerror(err));
return err;
}
/* Can we do the verification part? */
if (!snd_ctl_elem_info_is_readable(ctl->info))
return err;
snd_ctl_elem_value_set_id(read_val, ctl->id);
err = snd_ctl_elem_read(ctl->card->handle, read_val);
if (err < 0) {
ksft_print_msg("snd_ctl_elem_read() failed: %s\n",
snd_strerror(err));
return err;
}
/*
* Check for an event if the value changed, or confirm that
* there was none if it didn't. We rely on the kernel
* generating the notification before it returns from the
* write, this is currently true, should that ever change this
* will most likely break and need updating.
*/
if (!snd_ctl_elem_info_is_volatile(ctl->info)) {
err = wait_for_event(ctl, 0);
if (snd_ctl_elem_value_compare(initial_val, read_val)) {
if (err < 1) {
ksft_print_msg("No event generated for %s\n",
ctl->name);
ctl->event_missing++;
}
} else {
if (err != 0) {
ksft_print_msg("Spurious event generated for %s\n",
ctl->name);
ctl->event_spurious++;
}
}
}
/*
* Use the libray to compare values, if there's a mismatch
* carry on and try to provide a more useful diagnostic than
* just "mismatch".
*/
if (!snd_ctl_elem_value_compare(expected_val, read_val))
return 0;
mismatch_shown = false;
for (i = 0; i < snd_ctl_elem_info_get_count(ctl->info); i++)
if (show_mismatch(ctl, i, read_val, expected_val))
mismatch_shown = true;
if (!mismatch_shown)
ksft_print_msg("%s read and written values differ\n",
ctl->name);
return -1;
}
/*
* Make sure we can write the default value back to the control, this
* should validate that at least some write works.
*/
static void test_ctl_write_default(struct ctl_data *ctl)
{
int err;
/* If the control is turned off let's be polite */
if (snd_ctl_elem_info_is_inactive(ctl->info)) {
ksft_print_msg("%s is inactive\n", ctl->name);
ksft_test_result_skip("write_default.%d.%d\n",
ctl->card->card, ctl->elem);
return;
}
if (!snd_ctl_elem_info_is_writable(ctl->info)) {
ksft_print_msg("%s is not writeable\n", ctl->name);
ksft_test_result_skip("write_default.%d.%d\n",
ctl->card->card, ctl->elem);
return;
}
/* No idea what the default was for unreadable controls */
if (!snd_ctl_elem_info_is_readable(ctl->info)) {
ksft_print_msg("%s couldn't read default\n", ctl->name);
ksft_test_result_skip("write_default.%d.%d\n",
ctl->card->card, ctl->elem);
return;
}
err = write_and_verify(ctl, ctl->def_val, NULL);
ksft_test_result(err >= 0, "write_default.%d.%d\n",
ctl->card->card, ctl->elem);
}
static bool test_ctl_write_valid_boolean(struct ctl_data *ctl)
{
int err, i, j;
bool fail = false;
snd_ctl_elem_value_t *val;
snd_ctl_elem_value_alloca(&val);
snd_ctl_elem_value_set_id(val, ctl->id);
for (i = 0; i < snd_ctl_elem_info_get_count(ctl->info); i++) {
for (j = 0; j < 2; j++) {
snd_ctl_elem_value_set_boolean(val, i, j);
err = write_and_verify(ctl, val, NULL);
if (err != 0)
fail = true;
}
}
return !fail;
}
static bool test_ctl_write_valid_integer(struct ctl_data *ctl)
{
int err;
int i;
long j, step;
bool fail = false;
snd_ctl_elem_value_t *val;
snd_ctl_elem_value_alloca(&val);
snd_ctl_elem_value_set_id(val, ctl->id);
step = snd_ctl_elem_info_get_step(ctl->info);
if (!step)
step = 1;
for (i = 0; i < snd_ctl_elem_info_get_count(ctl->info); i++) {
for (j = snd_ctl_elem_info_get_min(ctl->info);
j <= snd_ctl_elem_info_get_max(ctl->info); j += step) {
snd_ctl_elem_value_set_integer(val, i, j);
err = write_and_verify(ctl, val, NULL);
if (err != 0)
fail = true;
}
}
return !fail;
}
static bool test_ctl_write_valid_integer64(struct ctl_data *ctl)
{
int err, i;
long long j, step;
bool fail = false;
snd_ctl_elem_value_t *val;
snd_ctl_elem_value_alloca(&val);
snd_ctl_elem_value_set_id(val, ctl->id);
step = snd_ctl_elem_info_get_step64(ctl->info);
if (!step)
step = 1;
for (i = 0; i < snd_ctl_elem_info_get_count(ctl->info); i++) {
for (j = snd_ctl_elem_info_get_min64(ctl->info);
j <= snd_ctl_elem_info_get_max64(ctl->info); j += step) {
snd_ctl_elem_value_set_integer64(val, i, j);
err = write_and_verify(ctl, val, NULL);
if (err != 0)
fail = true;
}
}
return !fail;
}
static bool test_ctl_write_valid_enumerated(struct ctl_data *ctl)
{
int err, i, j;
bool fail = false;
snd_ctl_elem_value_t *val;
snd_ctl_elem_value_alloca(&val);
snd_ctl_elem_value_set_id(val, ctl->id);
for (i = 0; i < snd_ctl_elem_info_get_count(ctl->info); i++) {
for (j = 0; j < snd_ctl_elem_info_get_items(ctl->info); j++) {
snd_ctl_elem_value_set_enumerated(val, i, j);
err = write_and_verify(ctl, val, NULL);
if (err != 0)
fail = true;
}
}
return !fail;
}
static void test_ctl_write_valid(struct ctl_data *ctl)
{
bool pass;
int err;
/* If the control is turned off let's be polite */
if (snd_ctl_elem_info_is_inactive(ctl->info)) {
ksft_print_msg("%s is inactive\n", ctl->name);
ksft_test_result_skip("write_valid.%d.%d\n",
ctl->card->card, ctl->elem);
return;
}
if (!snd_ctl_elem_info_is_writable(ctl->info)) {
ksft_print_msg("%s is not writeable\n", ctl->name);
ksft_test_result_skip("write_valid.%d.%d\n",
ctl->card->card, ctl->elem);
return;
}
switch (snd_ctl_elem_info_get_type(ctl->info)) {
case SND_CTL_ELEM_TYPE_BOOLEAN:
pass = test_ctl_write_valid_boolean(ctl);
break;
case SND_CTL_ELEM_TYPE_INTEGER:
pass = test_ctl_write_valid_integer(ctl);
break;
case SND_CTL_ELEM_TYPE_INTEGER64:
pass = test_ctl_write_valid_integer64(ctl);
break;
case SND_CTL_ELEM_TYPE_ENUMERATED:
pass = test_ctl_write_valid_enumerated(ctl);
break;
default:
/* No tests for this yet */
ksft_test_result_skip("write_valid.%d.%d\n",
ctl->card->card, ctl->elem);
return;
}
/* Restore the default value to minimise disruption */
err = write_and_verify(ctl, ctl->def_val, NULL);
if (err < 0)
pass = false;
ksft_test_result(pass, "write_valid.%d.%d\n",
ctl->card->card, ctl->elem);
}
static bool test_ctl_write_invalid_value(struct ctl_data *ctl,
snd_ctl_elem_value_t *val)
{
int err;
long val_read;
/* Ideally this will fail... */
err = snd_ctl_elem_write(ctl->card->handle, val);
if (err < 0)
return false;
/* ...but some devices will clamp to an in range value */
err = snd_ctl_elem_read(ctl->card->handle, val);
if (err < 0) {
ksft_print_msg("%s failed to read: %s\n",
ctl->name, snd_strerror(err));
return true;
}
return !ctl_value_valid(ctl, val);
}
static bool test_ctl_write_invalid_boolean(struct ctl_data *ctl)
{
int err, i;
long val_read;
bool fail = false;
snd_ctl_elem_value_t *val;
snd_ctl_elem_value_alloca(&val);
for (i = 0; i < snd_ctl_elem_info_get_count(ctl->info); i++) {
snd_ctl_elem_value_copy(val, ctl->def_val);
snd_ctl_elem_value_set_boolean(val, i, 2);
if (test_ctl_write_invalid_value(ctl, val))
fail = true;
}
return !fail;
}
static bool test_ctl_write_invalid_integer(struct ctl_data *ctl)
{
int i;
bool fail = false;
snd_ctl_elem_value_t *val;
snd_ctl_elem_value_alloca(&val);
for (i = 0; i < snd_ctl_elem_info_get_count(ctl->info); i++) {
if (snd_ctl_elem_info_get_min(ctl->info) != LONG_MIN) {
/* Just under range */
snd_ctl_elem_value_copy(val, ctl->def_val);
snd_ctl_elem_value_set_integer(val, i,
snd_ctl_elem_info_get_min(ctl->info) - 1);
if (test_ctl_write_invalid_value(ctl, val))
fail = true;
/* Minimum representable value */
snd_ctl_elem_value_copy(val, ctl->def_val);
snd_ctl_elem_value_set_integer(val, i, LONG_MIN);
if (test_ctl_write_invalid_value(ctl, val))
fail = true;
}
if (snd_ctl_elem_info_get_max(ctl->info) != LONG_MAX) {
/* Just over range */
snd_ctl_elem_value_copy(val, ctl->def_val);
snd_ctl_elem_value_set_integer(val, i,
snd_ctl_elem_info_get_max(ctl->info) + 1);
if (test_ctl_write_invalid_value(ctl, val))
fail = true;
/* Maximum representable value */
snd_ctl_elem_value_copy(val, ctl->def_val);
snd_ctl_elem_value_set_integer(val, i, LONG_MAX);
if (test_ctl_write_invalid_value(ctl, val))
fail = true;
}
}
return !fail;
}
static bool test_ctl_write_invalid_integer64(struct ctl_data *ctl)
{
int i;
bool fail = false;
snd_ctl_elem_value_t *val;
snd_ctl_elem_value_alloca(&val);
for (i = 0; i < snd_ctl_elem_info_get_count(ctl->info); i++) {
if (snd_ctl_elem_info_get_min64(ctl->info) != LLONG_MIN) {
/* Just under range */
snd_ctl_elem_value_copy(val, ctl->def_val);
snd_ctl_elem_value_set_integer64(val, i,
snd_ctl_elem_info_get_min64(ctl->info) - 1);
if (test_ctl_write_invalid_value(ctl, val))
fail = true;
/* Minimum representable value */
snd_ctl_elem_value_copy(val, ctl->def_val);
snd_ctl_elem_value_set_integer64(val, i, LLONG_MIN);
if (test_ctl_write_invalid_value(ctl, val))
fail = true;
}
if (snd_ctl_elem_info_get_max64(ctl->info) != LLONG_MAX) {
/* Just over range */
snd_ctl_elem_value_copy(val, ctl->def_val);
snd_ctl_elem_value_set_integer64(val, i,
snd_ctl_elem_info_get_max64(ctl->info) + 1);
if (test_ctl_write_invalid_value(ctl, val))
fail = true;
/* Maximum representable value */
snd_ctl_elem_value_copy(val, ctl->def_val);
snd_ctl_elem_value_set_integer64(val, i, LLONG_MAX);
if (test_ctl_write_invalid_value(ctl, val))
fail = true;
}
}
return !fail;
}
static bool test_ctl_write_invalid_enumerated(struct ctl_data *ctl)
{
int err, i;
unsigned int val_read;
bool fail = false;
snd_ctl_elem_value_t *val;
snd_ctl_elem_value_alloca(&val);
snd_ctl_elem_value_set_id(val, ctl->id);
for (i = 0; i < snd_ctl_elem_info_get_count(ctl->info); i++) {
/* One beyond maximum */
snd_ctl_elem_value_copy(val, ctl->def_val);
snd_ctl_elem_value_set_enumerated(val, i,
snd_ctl_elem_info_get_items(ctl->info));
if (test_ctl_write_invalid_value(ctl, val))
fail = true;
/* Maximum representable value */
snd_ctl_elem_value_copy(val, ctl->def_val);
snd_ctl_elem_value_set_enumerated(val, i, UINT_MAX);
if (test_ctl_write_invalid_value(ctl, val))
fail = true;
}
return !fail;
}
static void test_ctl_write_invalid(struct ctl_data *ctl)
{
bool pass;
int err;
/* If the control is turned off let's be polite */
if (snd_ctl_elem_info_is_inactive(ctl->info)) {
ksft_print_msg("%s is inactive\n", ctl->name);
ksft_test_result_skip("write_invalid.%d.%d\n",
ctl->card->card, ctl->elem);
return;
}
if (!snd_ctl_elem_info_is_writable(ctl->info)) {
ksft_print_msg("%s is not writeable\n", ctl->name);
ksft_test_result_skip("write_invalid.%d.%d\n",
ctl->card->card, ctl->elem);
return;
}
switch (snd_ctl_elem_info_get_type(ctl->info)) {
case SND_CTL_ELEM_TYPE_BOOLEAN:
pass = test_ctl_write_invalid_boolean(ctl);
break;
case SND_CTL_ELEM_TYPE_INTEGER:
pass = test_ctl_write_invalid_integer(ctl);
break;
case SND_CTL_ELEM_TYPE_INTEGER64:
pass = test_ctl_write_invalid_integer64(ctl);
break;
case SND_CTL_ELEM_TYPE_ENUMERATED:
pass = test_ctl_write_invalid_enumerated(ctl);
break;
default:
/* No tests for this yet */
ksft_test_result_skip("write_invalid.%d.%d\n",
ctl->card->card, ctl->elem);
return;
}
/* Restore the default value to minimise disruption */
err = write_and_verify(ctl, ctl->def_val, NULL);
if (err < 0)
pass = false;
ksft_test_result(pass, "write_invalid.%d.%d\n",
ctl->card->card, ctl->elem);
}
static void test_ctl_event_missing(struct ctl_data *ctl)
{
ksft_test_result(!ctl->event_missing, "event_missing.%d.%d\n",
ctl->card->card, ctl->elem);
}
static void test_ctl_event_spurious(struct ctl_data *ctl)
{
ksft_test_result(!ctl->event_spurious, "event_spurious.%d.%d\n",
ctl->card->card, ctl->elem);
}
int main(void)
{
struct ctl_data *ctl;
ksft_print_header();
find_controls();
ksft_set_plan(num_controls * TESTS_PER_CONTROL);
for (ctl = ctl_list; ctl != NULL; ctl = ctl->next) {
/*
* Must test get_value() before we write anything, the
* test stores the default value for later cleanup.
*/
test_ctl_get_value(ctl);
test_ctl_name(ctl);
test_ctl_write_default(ctl);
test_ctl_write_valid(ctl);
test_ctl_write_invalid(ctl);
test_ctl_event_missing(ctl);
test_ctl_event_spurious(ctl);
}
ksft_exit_pass();
return 0;
}
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