alsa-util: Perform format and rate detection before setting HW params

Perform detection of supported sample format and rates just after device is
opened, before `snd_pcm_hw_params()` is called for the first time. This fixes a
problem where device restricts available sample rates after HW params are set
preventing sample rate detection (seen with UAC2 devices and kernel 6.1.9)

Bug: https://gitlab.freedesktop.org/pulseaudio/pulseaudio/-/issues/1414
Bug: https://github.com/alsa-project/alsa-lib/issues/119
Part-of: <https://gitlab.freedesktop.org/pulseaudio/pulseaudio/-/merge_requests/782>

1 files changed, 9 insertions, 5 deletions

diff --git a/src/modules/alsa/alsa-sink.c b/src/modules/alsa/alsa-sink.c
index b249df680..ca22f195f 100644
--- a/src/modules/alsa/alsa-sink.c
+++ b/src/modules/alsa/alsa-sink.c
@@ -2527,7 +2527,9 @@ pa_sink *pa_alsa_sink_new(pa_module *m, pa_modargs *ma, const char*driver, pa_ca
                       &ss, &map,
                       SND_PCM_STREAM_PLAYBACK,
                       &period_frames, &buffer_frames, tsched_frames,
-                      &b, &d, mapping)))
+                      &b, &d,
+                      &u->supported_formats, &u->supported_rates,
+                      mapping)))
             goto fail;
 
     } else if ((dev_id = pa_modargs_get_value(ma, "device_id", NULL))) {
@@ -2541,7 +2543,9 @@ pa_sink *pa_alsa_sink_new(pa_module *m, pa_modargs *ma, const char*driver, pa_ca
                       &ss, &map,
                       SND_PCM_STREAM_PLAYBACK,
                       &period_frames, &buffer_frames, tsched_frames,
-                      &b, &d, profile_set, &mapping)))
+                      &b, &d,
+                      &u->supported_formats, &u->supported_rates,
+                      profile_set, &mapping)))
             goto fail;
 
     } else {
@@ -2552,7 +2556,9 @@ pa_sink *pa_alsa_sink_new(pa_module *m, pa_modargs *ma, const char*driver, pa_ca
                       &ss, &map,
                       SND_PCM_STREAM_PLAYBACK,
                       &period_frames, &buffer_frames, tsched_frames,
-                      &b, &d, false)))
+                      &b, &d,
+                      &u->supported_formats, &u->supported_rates,
+                      false)))
             goto fail;
     }
 
@@ -2598,13 +2604,11 @@ pa_sink *pa_alsa_sink_new(pa_module *m, pa_modargs *ma, const char*driver, pa_ca
 
     u->verified_sample_spec = ss;
 
-    u->supported_formats = pa_alsa_get_supported_formats(u->pcm_handle, ss.format);
     if (!u->supported_formats) {
         pa_log_error("Failed to find any supported sample formats.");
         goto fail;
     }
 
-    u->supported_rates = pa_alsa_get_supported_rates(u->pcm_handle, ss.rate);
     if (!u->supported_rates) {
         pa_log_error("Failed to find any supported sample rates.");
         goto fail;