diff options
Diffstat (limited to 'sound/firewire/amdtp-stream.h')
| -rw-r--r-- | sound/firewire/amdtp-stream.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/sound/firewire/amdtp-stream.h b/sound/firewire/amdtp-stream.h index f021c1f49137..4bf701796166 100644 --- a/sound/firewire/amdtp-stream.h +++ b/sound/firewire/amdtp-stream.h @@ -103,6 +103,7 @@ struct pkt_desc { unsigned int data_blocks; unsigned int data_block_counter; __be32 *ctx_payload; + struct list_head link; }; struct amdtp_stream; @@ -126,6 +127,7 @@ struct amdtp_stream { unsigned int queue_size; int packet_index; struct pkt_desc *pkt_descs; + struct list_head packet_descs_list; int tag; union { struct { @@ -276,6 +278,16 @@ static inline void amdtp_stream_pcm_trigger(struct amdtp_stream *s, WRITE_ONCE(s->pcm, pcm); } +/** + * amdtp_stream_next_packet_desc - retrieve next descriptor for amdtp packet. + * @s: the AMDTP stream + * @desc: the descriptor of packet + * + * This macro computes next descriptor so that the list of descriptors behaves circular queue. + */ +#define amdtp_stream_next_packet_desc(s, desc) \ + list_next_entry_circular(desc, &s->packet_descs_list, link) + static inline bool cip_sfc_is_base_44100(enum cip_sfc sfc) { return sfc & 1; |