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milan-avb: msrp: scope Domain re-adjust to matching sr_class_id

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hackerman-kl 2026-05-27 09:55:30 +00:00 • committed by Wim Taymans
parent f3071aa549
commit 93e4957959
1 changed files with 30 additions and 9 deletions
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39
src/modules/module-avb/msrp.c
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@ -339,18 +339,39 @@ static int process_domain(struct msrp *msrp, uint64_t now, uint8_t attr_type,
continue;
}
if (msrp->server->avb_mode == AVB_MODE_MILAN_V12)
{
/** Milan V1.2 Section 4.2.7.2.1:
The endstation shall re-adjust the domain according
to the from the MSRPDU received on its interface */
bool mismatch = (a->attr->attr.domain.sr_class_id != d->sr_class_id
|| a->attr->attr.domain.sr_class_priority != d->sr_class_priority
if (msrp->server->avb_mode == AVB_MODE_MILAN_V12) {
/* Milan v1.2 §4.2.7.2.1: "re-adjust the domain" means
* align the priority/vid of the matching SR class — NOT
* overwrite every locally-held Domain attribute with the
* incoming values. The old code iterated all Domain
* attributes and smashed each one whose (id, prio, vid)
* didn't match the incoming, so when the talker
* advertised SR-B (id=5) both of pipewire's Domain
* attributes (originally SR-A id=6 and SR-B id=5) were
* overwritten to SR-B; when the talker then advertised
* SR-A, both flipped back to SR-A. Pipewire transmitted
* only one of the two SR classes at any moment, so the
* talker never saw a stable SR-A Domain declaration from
* pipewire and locked into TalkerFailed code 13.
*
* Correct re-adjust: only the locally-held attribute
* with the SAME sr_class_id gets its priority/vid
* updated. */
if (a->attr->attr.domain.sr_class_id != d->sr_class_id)
continue;
bool mismatch = (a->attr->attr.domain.sr_class_priority != d->sr_class_priority
|| a->attr->attr.domain.sr_class_vid != d->sr_class_vid);
if (mismatch) {
pw_log_info("Domain mismatch re-adjusting");
a->attr->attr.domain = *d;
pw_log_info("Domain re-adjust (sr_class_id=%u): prio %u->%u vid %u->%u",
d->sr_class_id,
a->attr->attr.domain.sr_class_priority,
d->sr_class_priority,
ntohs(a->attr->attr.domain.sr_class_vid),
ntohs(d->sr_class_vid));
a->attr->attr.domain.sr_class_priority = d->sr_class_priority;
a->attr->attr.domain.sr_class_vid = d->sr_class_vid;
avb_mrp_attribute_leave(a->attr->mrp, now);
avb_mrp_attribute_begin(a->attr->mrp, now);
avb_mrp_attribute_join(a->attr->mrp, now, true);