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-rw-r--r--sound/drivers/dummy.c75
1 files changed, 39 insertions, 36 deletions
diff --git a/sound/drivers/dummy.c b/sound/drivers/dummy.c
index 02ac3f4e0c02..9c17b49a2ae1 100644
--- a/sound/drivers/dummy.c
+++ b/sound/drivers/dummy.c
@@ -25,7 +25,6 @@
MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
MODULE_DESCRIPTION("Dummy soundcard (/dev/null)");
MODULE_LICENSE("GPL");
-MODULE_SUPPORTED_DEVICE("{{ALSA,Dummy soundcard}}");
#define MAX_PCM_DEVICES 4
#define MAX_PCM_SUBSTREAMS 128
@@ -43,6 +42,8 @@ MODULE_SUPPORTED_DEVICE("{{ALSA,Dummy soundcard}}");
#define USE_CHANNELS_MAX 2
#define USE_PERIODS_MIN 1
#define USE_PERIODS_MAX 1024
+#define USE_MIXER_VOLUME_LEVEL_MIN -50
+#define USE_MIXER_VOLUME_LEVEL_MAX 100
static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
@@ -51,6 +52,8 @@ static char *model[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = NULL};
static int pcm_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1};
static int pcm_substreams[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 8};
//static int midi_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 2};
+static int mixer_volume_level_min = USE_MIXER_VOLUME_LEVEL_MIN;
+static int mixer_volume_level_max = USE_MIXER_VOLUME_LEVEL_MAX;
#ifdef CONFIG_HIGH_RES_TIMERS
static bool hrtimer = 1;
#endif
@@ -70,6 +73,10 @@ module_param_array(pcm_substreams, int, NULL, 0444);
MODULE_PARM_DESC(pcm_substreams, "PCM substreams # (1-128) for dummy driver.");
//module_param_array(midi_devs, int, NULL, 0444);
//MODULE_PARM_DESC(midi_devs, "MIDI devices # (0-2) for dummy driver.");
+module_param(mixer_volume_level_min, int, 0444);
+MODULE_PARM_DESC(mixer_volume_level_min, "Minimum mixer volume level for dummy driver. Default: -50");
+module_param(mixer_volume_level_max, int, 0444);
+MODULE_PARM_DESC(mixer_volume_level_max, "Maximum mixer volume level for dummy driver. Default: 100");
module_param(fake_buffer, bool, 0444);
MODULE_PARM_DESC(fake_buffer, "Fake buffer allocations.");
#ifdef CONFIG_HIGH_RES_TIMERS
@@ -236,7 +243,7 @@ struct dummy_systimer_pcm {
static void dummy_systimer_rearm(struct dummy_systimer_pcm *dpcm)
{
mod_timer(&dpcm->timer, jiffies +
- (dpcm->frac_period_rest + dpcm->rate - 1) / dpcm->rate);
+ DIV_ROUND_UP(dpcm->frac_period_rest, dpcm->rate));
}
static void dummy_systimer_update(struct dummy_systimer_pcm *dpcm)
@@ -297,7 +304,7 @@ static void dummy_systimer_callback(struct timer_list *t)
struct dummy_systimer_pcm *dpcm = from_timer(dpcm, t, timer);
unsigned long flags;
int elapsed = 0;
-
+
spin_lock_irqsave(&dpcm->lock, flags);
dummy_systimer_update(dpcm);
dummy_systimer_rearm(dpcm);
@@ -714,11 +721,11 @@ static int snd_dummy_volume_info(struct snd_kcontrol *kcontrol,
{
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
uinfo->count = 2;
- uinfo->value.integer.min = -50;
- uinfo->value.integer.max = 100;
+ uinfo->value.integer.min = mixer_volume_level_min;
+ uinfo->value.integer.max = mixer_volume_level_max;
return 0;
}
-
+
static int snd_dummy_volume_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
@@ -740,15 +747,15 @@ static int snd_dummy_volume_put(struct snd_kcontrol *kcontrol,
int left, right;
left = ucontrol->value.integer.value[0];
- if (left < -50)
- left = -50;
- if (left > 100)
- left = 100;
+ if (left < mixer_volume_level_min)
+ left = mixer_volume_level_min;
+ if (left > mixer_volume_level_max)
+ left = mixer_volume_level_max;
right = ucontrol->value.integer.value[1];
- if (right < -50)
- right = -50;
- if (right > 100)
- right = 100;
+ if (right < mixer_volume_level_min)
+ right = mixer_volume_level_min;
+ if (right > mixer_volume_level_max)
+ right = mixer_volume_level_max;
spin_lock_irq(&dummy->mixer_lock);
change = dummy->mixer_volume[addr][0] != left ||
dummy->mixer_volume[addr][1] != right;
@@ -767,7 +774,7 @@ static const DECLARE_TLV_DB_SCALE(db_scale_dummy, -4500, 30, 0);
.private_value = addr }
#define snd_dummy_capsrc_info snd_ctl_boolean_stereo_info
-
+
static int snd_dummy_capsrc_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
@@ -901,10 +908,10 @@ static int snd_card_dummy_new_mixer(struct snd_dummy *dummy)
static void print_formats(struct snd_dummy *dummy,
struct snd_info_buffer *buffer)
{
- int i;
+ snd_pcm_format_t i;
- for (i = 0; i <= SNDRV_PCM_FORMAT_LAST; i++) {
- if (dummy->pcm_hw.formats & (1ULL << i))
+ pcm_for_each_format(i) {
+ if (dummy->pcm_hw.formats & pcm_format_to_bits(i))
snd_iprintf(buffer, " %s", snd_pcm_format_name(i));
}
}
@@ -1026,8 +1033,8 @@ static int snd_dummy_probe(struct platform_device *devptr)
int idx, err;
int dev = devptr->id;
- err = snd_card_new(&devptr->dev, index[dev], id[dev], THIS_MODULE,
- sizeof(struct snd_dummy), &card);
+ err = snd_devm_card_new(&devptr->dev, index[dev], id[dev], THIS_MODULE,
+ sizeof(struct snd_dummy), &card);
if (err < 0)
return err;
dummy = card->private_data;
@@ -1048,7 +1055,7 @@ static int snd_dummy_probe(struct platform_device *devptr)
pcm_substreams[dev] = MAX_PCM_SUBSTREAMS;
err = snd_card_dummy_pcm(dummy, idx, pcm_substreams[dev]);
if (err < 0)
- goto __nodev;
+ return err;
}
dummy->pcm_hw = dummy_pcm_hardware;
@@ -1077,9 +1084,15 @@ static int snd_dummy_probe(struct platform_device *devptr)
dummy->pcm_hw.channels_max = m->channels_max;
}
+ if (mixer_volume_level_min > mixer_volume_level_max) {
+ pr_warn("snd-dummy: Invalid mixer volume level: min=%d, max=%d. Fall back to default value.\n",
+ mixer_volume_level_min, mixer_volume_level_max);
+ mixer_volume_level_min = USE_MIXER_VOLUME_LEVEL_MIN;
+ mixer_volume_level_max = USE_MIXER_VOLUME_LEVEL_MAX;
+ }
err = snd_card_dummy_new_mixer(dummy);
if (err < 0)
- goto __nodev;
+ return err;
strcpy(card->driver, "Dummy");
strcpy(card->shortname, "Dummy");
sprintf(card->longname, "Dummy %i", dev + 1);
@@ -1087,18 +1100,9 @@ static int snd_dummy_probe(struct platform_device *devptr)
dummy_proc_init(dummy);
err = snd_card_register(card);
- if (err == 0) {
- platform_set_drvdata(devptr, card);
- return 0;
- }
- __nodev:
- snd_card_free(card);
- return err;
-}
-
-static int snd_dummy_remove(struct platform_device *devptr)
-{
- snd_card_free(platform_get_drvdata(devptr));
+ if (err < 0)
+ return err;
+ platform_set_drvdata(devptr, card);
return 0;
}
@@ -1110,7 +1114,7 @@ static int snd_dummy_suspend(struct device *pdev)
snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
return 0;
}
-
+
static int snd_dummy_resume(struct device *pdev)
{
struct snd_card *card = dev_get_drvdata(pdev);
@@ -1129,7 +1133,6 @@ static SIMPLE_DEV_PM_OPS(snd_dummy_pm, snd_dummy_suspend, snd_dummy_resume);
static struct platform_driver snd_dummy_driver = {
.probe = snd_dummy_probe,
- .remove = snd_dummy_remove,
.driver = {
.name = SND_DUMMY_DRIVER,
.pm = SND_DUMMY_PM_OPS,
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.