Re: [PATCH v2] Bluetooth: ISO: Support SOCK_RCVTSTAMP via CMSG for ISO sockets

[Paul Menzel <pmenzel@molgen.mpg.de>]

Dear Li,


Thank you for your patch.


Am 02.07.25 um 13:35 schrieb Yang Li via B4 Relay:
> From: Yang Li <yang.li@amlogic.com>
> 
> User-space applications (e.g., PipeWire) depend on
> ISO-formatted timestamps for precise audio sync.

Does PipeWire log anything? It’d be great if you could add how to 
reproduce the issue including the PipeWire version.

> Signed-off-by: Yang Li <yang.li@amlogic.com>
> ---
> Changes in v2:
> - Support SOCK_RCVTSTAMPNS via CMSG for ISO sockets
> - Link to v1: https://lore.kernel.org/r/20250429-iso_ts-v1-1-e586f30de6cb@amlogic.com
> ---
>   net/bluetooth/iso.c | 3 +++
>   1 file changed, 3 insertions(+)
> 
> diff --git a/net/bluetooth/iso.c b/net/bluetooth/iso.c
> index fc22782cbeeb..6927c593a1d6 100644
> --- a/net/bluetooth/iso.c
> +++ b/net/bluetooth/iso.c
> @@ -2308,6 +2308,9 @@ void iso_recv(struct hci_conn *hcon, struct sk_buff *skb, u16 flags)
>   				goto drop;
>   			}
>   
> +			/* Record the timestamp to skb*/
> +			skb->skb_mstamp_ns = le32_to_cpu(hdr->ts);
> +
>   			len = __le16_to_cpu(hdr->slen);
>   		} else {
>   			struct hci_iso_data_hdr *hdr;

Kind regards,

Paul