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Diffstat (limited to 'sound/usb/pcm.c')
-rw-r--r--sound/usb/pcm.c171
1 files changed, 108 insertions, 63 deletions
diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c
index 56079901769f..f71965bf815f 100644
--- a/sound/usb/pcm.c
+++ b/sound/usb/pcm.c
@@ -663,7 +663,7 @@ static int hw_check_valid_format(struct snd_usb_substream *subs,
check_fmts.bits[1] = (u32)(fp->formats >> 32);
snd_mask_intersect(&check_fmts, fmts);
if (snd_mask_empty(&check_fmts)) {
- hwc_debug(" > check: no supported format %d\n", fp->format);
+ hwc_debug(" > check: no supported format 0x%llx\n", fp->formats);
return 0;
}
/* check the channels */
@@ -775,24 +775,11 @@ static int hw_rule_channels(struct snd_pcm_hw_params *params,
return apply_hw_params_minmax(it, rmin, rmax);
}
-static int hw_rule_format(struct snd_pcm_hw_params *params,
- struct snd_pcm_hw_rule *rule)
+static int apply_hw_params_format_bits(struct snd_mask *fmt, u64 fbits)
{
- struct snd_usb_substream *subs = rule->private;
- const struct audioformat *fp;
- struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
- u64 fbits;
u32 oldbits[2];
int changed;
- hwc_debug("hw_rule_format: %x:%x\n", fmt->bits[0], fmt->bits[1]);
- fbits = 0;
- list_for_each_entry(fp, &subs->fmt_list, list) {
- if (!hw_check_valid_format(subs, params, fp))
- continue;
- fbits |= fp->formats;
- }
-
oldbits[0] = fmt->bits[0];
oldbits[1] = fmt->bits[1];
fmt->bits[0] &= (u32)fbits;
@@ -806,6 +793,24 @@ static int hw_rule_format(struct snd_pcm_hw_params *params,
return changed;
}
+static int hw_rule_format(struct snd_pcm_hw_params *params,
+ struct snd_pcm_hw_rule *rule)
+{
+ struct snd_usb_substream *subs = rule->private;
+ const struct audioformat *fp;
+ struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
+ u64 fbits;
+
+ hwc_debug("hw_rule_format: %x:%x\n", fmt->bits[0], fmt->bits[1]);
+ fbits = 0;
+ list_for_each_entry(fp, &subs->fmt_list, list) {
+ if (!hw_check_valid_format(subs, params, fp))
+ continue;
+ fbits |= fp->formats;
+ }
+ return apply_hw_params_format_bits(fmt, fbits);
+}
+
static int hw_rule_period_time(struct snd_pcm_hw_params *params,
struct snd_pcm_hw_rule *rule)
{
@@ -833,64 +838,92 @@ static int hw_rule_period_time(struct snd_pcm_hw_params *params,
return apply_hw_params_minmax(it, pmin, UINT_MAX);
}
-/* 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)
+/* get the EP or the sync EP for implicit fb when it's already set up */
+static const struct snd_usb_endpoint *
+get_sync_ep_from_substream(struct snd_usb_substream *subs)
{
struct snd_usb_audio *chip = subs->stream->chip;
- struct snd_usb_endpoint *ep;
const struct audioformat *fp;
- int err;
+ const struct snd_usb_endpoint *ep;
list_for_each_entry(fp, &subs->fmt_list, list) {
ep = snd_usb_get_endpoint(chip, fp->endpoint);
if (ep && ep->cur_rate)
- goto found;
+ return ep;
if (!fp->implicit_fb)
continue;
/* for the implicit fb, check the sync ep as well */
ep = snd_usb_get_endpoint(chip, fp->sync_ep);
if (ep && ep->cur_rate)
- goto found;
+ return ep;
}
- return 0;
+ return NULL;
+}
+
+/* additional hw constraints for implicit feedback mode */
+static int hw_rule_format_implicit_fb(struct snd_pcm_hw_params *params,
+ struct snd_pcm_hw_rule *rule)
+{
+ struct snd_usb_substream *subs = rule->private;
+ const struct snd_usb_endpoint *ep;
+ struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
- found:
- if (!find_format(&subs->fmt_list, ep->cur_format, ep->cur_rate,
- ep->cur_channels, false, NULL)) {
- usb_audio_dbg(chip, "EP 0x%x being used, but not applicable\n",
- ep->ep_num);
+ ep = get_sync_ep_from_substream(subs);
+ if (!ep)
return 0;
- }
- usb_audio_dbg(chip, "EP 0x%x being used, using fixed params:\n",
- ep->ep_num);
- usb_audio_dbg(chip, "rate=%d, period_size=%d, periods=%d\n",
- ep->cur_rate, ep->cur_period_frames,
- ep->cur_buffer_periods);
+ hwc_debug("applying %s\n", __func__);
+ return apply_hw_params_format_bits(fmt, pcm_format_to_bits(ep->cur_format));
+}
- runtime->hw.formats = subs->formats;
- runtime->hw.rate_min = runtime->hw.rate_max = ep->cur_rate;
- runtime->hw.rates = SNDRV_PCM_RATE_KNOT;
- runtime->hw.periods_min = runtime->hw.periods_max =
- ep->cur_buffer_periods;
+static int hw_rule_rate_implicit_fb(struct snd_pcm_hw_params *params,
+ struct snd_pcm_hw_rule *rule)
+{
+ struct snd_usb_substream *subs = rule->private;
+ const struct snd_usb_endpoint *ep;
+ struct snd_interval *it;
- err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
- hw_rule_channels, subs,
- SNDRV_PCM_HW_PARAM_FORMAT,
- SNDRV_PCM_HW_PARAM_RATE,
- -1);
- if (err < 0)
- return err;
+ ep = get_sync_ep_from_substream(subs);
+ if (!ep)
+ return 0;
- 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;
+ hwc_debug("applying %s\n", __func__);
+ it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
+ return apply_hw_params_minmax(it, ep->cur_rate, ep->cur_rate);
+}
+
+static int hw_rule_period_size_implicit_fb(struct snd_pcm_hw_params *params,
+ struct snd_pcm_hw_rule *rule)
+{
+ struct snd_usb_substream *subs = rule->private;
+ const struct snd_usb_endpoint *ep;
+ struct snd_interval *it;
- return 1; /* notify the finding */
+ ep = get_sync_ep_from_substream(subs);
+ if (!ep)
+ return 0;
+
+ hwc_debug("applying %s\n", __func__);
+ it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
+ return apply_hw_params_minmax(it, ep->cur_period_frames,
+ ep->cur_period_frames);
+}
+
+static int hw_rule_periods_implicit_fb(struct snd_pcm_hw_params *params,
+ struct snd_pcm_hw_rule *rule)
+{
+ struct snd_usb_substream *subs = rule->private;
+ const struct snd_usb_endpoint *ep;
+ struct snd_interval *it;
+
+ ep = get_sync_ep_from_substream(subs);
+ if (!ep)
+ return 0;
+
+ hwc_debug("applying %s\n", __func__);
+ it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIODS);
+ return apply_hw_params_minmax(it, ep->cur_buffer_periods,
+ ep->cur_buffer_periods);
}
/*
@@ -899,20 +932,11 @@ static int apply_hw_constraint_from_sync(struct snd_pcm_runtime *runtime,
static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substream *subs)
{
- struct snd_usb_audio *chip = subs->stream->chip;
const struct audioformat *fp;
unsigned int pt, ptmin;
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;
@@ -964,7 +988,6 @@ static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substre
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,
@@ -993,6 +1016,28 @@ add_extra_rules:
return err;
}
+ /* additional hw constraints for implicit fb */
+ err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
+ hw_rule_format_implicit_fb, subs,
+ SNDRV_PCM_HW_PARAM_FORMAT, -1);
+ if (err < 0)
+ return err;
+ err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
+ hw_rule_rate_implicit_fb, subs,
+ SNDRV_PCM_HW_PARAM_RATE, -1);
+ if (err < 0)
+ return err;
+ err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
+ hw_rule_period_size_implicit_fb, subs,
+ SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
+ if (err < 0)
+ return err;
+ err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
+ hw_rule_periods_implicit_fb, subs,
+ SNDRV_PCM_HW_PARAM_PERIODS, -1);
+ if (err < 0)
+ return err;
+
return 0;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-02 16:31:48 +0100