Commit b73dad80 authored by Jaroslav Kysela's avatar Jaroslav Kysela Committed by Takashi Iwai
Browse files

kselftest: alsa: Use private alsa-lib configuration in mixer test 



As mentined by Takashi Sakamoto, the system-wide alsa-lib configuration
may override the standard device declarations. This patch use the private
alsa-lib configuration to set the predictable environment.

Signed-off-by: default avatarJaroslav Kysela <perex@perex.cz>
Link: https://lore.kernel.org/r/20211208095209.1772296-1-perex@perex.cz


[Restructure version test to keep the preprocessor happy -- broonie]
Reviewed-by: default avatarShuah Khan <skhan@linuxfoundation.org>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20211210185410.740009-4-broonie@kernel.org


Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 7cc994f2

tools/testing/selftests/alsa/mixer-test.c

+55 −1
Original line number Diff line number Diff line
@@ -46,22 +46,74 @@ struct ctl_data { 
	struct ctl_data *next;

};



static const char *alsa_config =

"ctl.hw {\n"

"	@args [ CARD ]\n"

"	@args.CARD.type string\n"

"	type hw\n"

"	card $CARD\n"

"}\n"

;



int num_cards = 0;

int num_controls = 0;

struct card_data *card_list = NULL;

struct ctl_data *ctl_list = NULL;



#ifdef SND_LIB_VER

#if SND_LIB_VERSION >= SND_LIB_VER(1, 2, 6)

#define LIB_HAS_LOAD_STRING

#endif

#endif



#ifndef LIB_HAS_LOAD_STRING

int snd_config_load_string(snd_config_t **config, const char *s, size_t size)

{

	snd_input_t *input;

	snd_config_t *dst;

	int err;



	assert(config && s);

	if (size == 0)

		size = strlen(s);

	err = snd_input_buffer_open(&input, s, size);

	if (err < 0)

		return err;

	err = snd_config_top(&dst);

	if (err < 0) {

		snd_input_close(input);

		return err;

	}

	err = snd_config_load(dst, input);

	snd_input_close(input);

	if (err < 0) {

		snd_config_delete(dst);

		return err;

	}

	*config = dst;

	return 0;

}

#endif



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;



	err = snd_config_load_string(&config, alsa_config, strlen(alsa_config));

	if (err < 0) {

		ksft_print_msg("Unable to parse custom alsa-lib configuration: %s\n",

			       snd_strerror(err));

		ksft_exit_fail();

	}



	while (card >= 0) {

		sprintf(name, "hw:%d", card);
@@ -69,7 +121,7 @@ void find_controls(void) 
		if (!card_data)

			ksft_exit_fail_msg("Out of memory\n");



		err = snd_ctl_open(&card_data->handle, name, 0);

		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));
@@ -137,6 +189,8 @@ void find_controls(void) 
			break;

		}

	}



	snd_config_delete(config);

}



/*