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Diffstat (limited to 'sound/usb/pcm.c')
-rw-r--r--sound/usb/pcm.c148
1 files changed, 113 insertions, 35 deletions
diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c
index 78933b6571d0..6d1f5277cd90 100644
--- a/sound/usb/pcm.c
+++ b/sound/usb/pcm.c
@@ -81,30 +81,33 @@ static snd_pcm_uframes_t snd_usb_pcm_pointer(struct snd_pcm_substream *substream
/*
* find a matching audio format
*/
-static struct audioformat *find_format(struct snd_usb_substream *subs)
+static struct audioformat *find_format(struct list_head *fmt_list_head,
+ snd_pcm_format_t format,
+ unsigned int rate,
+ unsigned int channels,
+ struct snd_usb_substream *subs)
{
struct audioformat *fp;
struct audioformat *found = NULL;
int cur_attr = 0, attr;
- list_for_each_entry(fp, &subs->fmt_list, list) {
- if (!(fp->formats & pcm_format_to_bits(subs->pcm_format)))
+ list_for_each_entry(fp, fmt_list_head, list) {
+ if (!(fp->formats & pcm_format_to_bits(format)))
continue;
- if (fp->channels != subs->channels)
+ if (fp->channels != channels)
continue;
- if (subs->cur_rate < fp->rate_min ||
- subs->cur_rate > fp->rate_max)
+ if (rate < fp->rate_min || rate > fp->rate_max)
continue;
- if (! (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)) {
+ if (!(fp->rates & SNDRV_PCM_RATE_CONTINUOUS)) {
unsigned int i;
for (i = 0; i < fp->nr_rates; i++)
- if (fp->rate_table[i] == subs->cur_rate)
+ if (fp->rate_table[i] == rate)
break;
if (i >= fp->nr_rates)
continue;
}
attr = fp->ep_attr & USB_ENDPOINT_SYNCTYPE;
- if (! found) {
+ if (!found) {
found = fp;
cur_attr = attr;
continue;
@@ -114,7 +117,7 @@ static struct audioformat *find_format(struct snd_usb_substream *subs)
* this is a workaround for the case like
* M-audio audiophile USB.
*/
- if (attr != cur_attr) {
+ if (subs && attr != cur_attr) {
if ((attr == USB_ENDPOINT_SYNC_ASYNC &&
subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
(attr == USB_ENDPOINT_SYNC_ADAPTIVE &&
@@ -138,6 +141,12 @@ static struct audioformat *find_format(struct snd_usb_substream *subs)
return found;
}
+static struct audioformat *find_substream_format(struct snd_usb_substream *subs)
+{
+ return find_format(&subs->fmt_list, subs->pcm_format, subs->cur_rate,
+ subs->channels, subs);
+}
+
static int init_pitch_v1(struct snd_usb_audio *chip, int iface,
struct usb_host_interface *alts,
struct audioformat *fmt)
@@ -744,7 +753,6 @@ static int match_endpoint_audioformats(struct snd_usb_substream *subs,
*/
static int configure_sync_endpoint(struct snd_usb_substream *subs)
{
- int ret;
struct audioformat *fp;
struct audioformat *sync_fp = NULL;
int cur_score = 0;
@@ -752,16 +760,16 @@ static int configure_sync_endpoint(struct snd_usb_substream *subs)
struct snd_usb_substream *sync_subs =
&subs->stream->substream[subs->direction ^ 1];
- if (subs->sync_endpoint->type != SND_USB_ENDPOINT_TYPE_DATA ||
- !subs->stream)
- return snd_usb_endpoint_set_params(subs->sync_endpoint,
- subs->pcm_format,
- subs->channels,
- subs->period_bytes,
- 0, 0,
- subs->cur_rate,
- subs->cur_audiofmt,
- NULL);
+ if (subs->fixed_hw ||
+ !subs->sync_endpoint->is_implicit_feedback) {
+ sync_fp = subs->cur_audiofmt;
+ goto configure;
+ }
+
+ sync_fp = find_format(&sync_subs->fmt_list, subs->pcm_format,
+ subs->cur_rate, subs->channels, NULL);
+ if (sync_fp)
+ goto configure;
/* Try to find the best matching audioformat. */
list_for_each_entry(fp, &sync_subs->fmt_list, list) {
@@ -794,16 +802,16 @@ static int configure_sync_endpoint(struct snd_usb_substream *subs)
__func__, subs->period_bytes, sync_period_bytes);
}
- ret = snd_usb_endpoint_set_params(subs->sync_endpoint,
- subs->pcm_format,
- sync_fp->channels,
- sync_period_bytes,
- 0, 0,
- subs->cur_rate,
- sync_fp,
- NULL);
-
- return ret;
+ configure:
+ return snd_usb_endpoint_set_params(subs->sync_endpoint,
+ subs->pcm_format,
+ sync_fp->channels,
+ sync_period_bytes,
+ subs->period_frames,
+ subs->buffer_periods,
+ subs->cur_rate,
+ sync_fp,
+ NULL);
}
/*
@@ -912,7 +920,7 @@ static int snd_usb_hw_params(struct snd_pcm_substream *substream,
subs->channels = params_channels(hw_params);
subs->cur_rate = params_rate(hw_params);
- fmt = find_format(subs);
+ fmt = find_substream_format(subs);
if (!fmt) {
dev_dbg(&subs->dev->dev,
"cannot set format: format = %#x, rate = %d, channels = %d\n",
@@ -956,12 +964,13 @@ static int snd_usb_hw_params(struct snd_pcm_substream *substream,
static int snd_usb_hw_free(struct snd_pcm_substream *substream)
{
struct snd_usb_substream *subs = substream->runtime->private_data;
+ struct snd_usb_audio *chip = subs->stream->chip;
snd_media_stop_pipeline(subs);
subs->cur_audiofmt = NULL;
subs->cur_rate = 0;
subs->period_bytes = 0;
- if (!snd_usb_lock_shutdown(subs->stream->chip)) {
+ if (!snd_usb_lock_shutdown(chip)) {
stop_endpoints(subs);
sync_pending_stops(subs);
snd_usb_endpoint_deactivate(subs->sync_endpoint);
@@ -971,7 +980,7 @@ static int snd_usb_hw_free(struct snd_pcm_substream *substream)
subs->data_endpoint = NULL;
}
subs->sync_endpoint = NULL;
- snd_usb_unlock_shutdown(subs->stream->chip);
+ snd_usb_unlock_shutdown(chip);
}
return 0;
@@ -1288,6 +1297,64 @@ static int hw_rule_period_time(struct snd_pcm_hw_params *params,
return changed;
}
+/* apply PCM hw constraints from the concurrent sync EP */
+static int apply_hw_constraint_from_sync(struct snd_pcm_runtime *runtime,
+ struct snd_usb_substream *subs)
+{
+ struct snd_usb_audio *chip = subs->stream->chip;
+ struct snd_usb_endpoint *ep;
+ struct audioformat *fp;
+ int err;
+
+ subs->fixed_hw = 0;
+ list_for_each_entry(fp, &subs->fmt_list, list) {
+ ep = snd_usb_get_endpoint(chip, fp->endpoint, fp->iface,
+ fp->altsetting);
+ if (ep && ep->cur_rate)
+ goto found;
+ if (!fp->implicit_fb)
+ continue;
+ /* for the implicit fb, check the sync ep as well */
+ ep = snd_usb_get_endpoint(chip, fp->sync_ep, fp->sync_iface,
+ fp->sync_altsetting);
+ if (ep && ep->cur_rate)
+ goto found;
+ }
+ return 0;
+
+ found:
+ if (!find_format(&subs->fmt_list, ep->cur_format, ep->cur_rate,
+ ep->cur_channels, NULL)) {
+ usb_audio_dbg(chip, "EP 0x%x being used, but not applicable\n",
+ ep->ep_num);
+ return 0;
+ }
+
+ usb_audio_dbg(chip, "EP 0x%x being used, using fixed params:\n",
+ ep->ep_num);
+ usb_audio_dbg(chip, "rate=%d, format=%s, channels=%d, period_size=%d, periods=%d\n",
+ ep->cur_rate, snd_pcm_format_name(ep->cur_format),
+ ep->cur_channels, ep->cur_period_frames,
+ ep->cur_buffer_periods);
+
+ runtime->hw.formats = pcm_format_to_bits(ep->cur_format);
+ runtime->hw.rate_min = runtime->hw.rate_max = ep->cur_rate;
+ runtime->hw.channels_min = runtime->hw.channels_max =
+ ep->cur_channels;
+ runtime->hw.rates = SNDRV_PCM_RATE_KNOT;
+ runtime->hw.periods_min = runtime->hw.periods_max =
+ ep->cur_buffer_periods;
+ subs->fixed_hw = 1;
+
+ err = snd_pcm_hw_constraint_minmax(runtime,
+ SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
+ ep->cur_period_frames,
+ ep->cur_period_frames);
+ if (err < 0)
+ return err;
+
+ return 1; /* notify the finding */
+}
/*
* set up the runtime hardware information.
@@ -1295,11 +1362,20 @@ static int hw_rule_period_time(struct snd_pcm_hw_params *params,
static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substream *subs)
{
+ struct snd_usb_audio *chip = subs->stream->chip;
struct audioformat *fp;
unsigned int pt, ptmin;
- int param_period_time_if_needed;
+ int param_period_time_if_needed = -1;
int err;
+ mutex_lock(&chip->mutex);
+ err = apply_hw_constraint_from_sync(runtime, subs);
+ mutex_unlock(&chip->mutex);
+ if (err < 0)
+ return err;
+ if (err > 0) /* found the matching? */
+ goto add_extra_rules;
+
runtime->hw.formats = subs->formats;
runtime->hw.rate_min = 0x7fffffff;
@@ -1350,6 +1426,8 @@ static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substre
-1);
if (err < 0)
return err;
+
+add_extra_rules:
err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
hw_rule_channels, subs,
SNDRV_PCM_HW_PARAM_FORMAT,
generated by cgit v1.2.3 (git 2.39.0) at 2024-08-19 07:42:11 +0300