@@ -104,6 +104,9 @@ int amdtp_stream_init(struct amdtp_stream *s, struct fw_unit *unit,
s->fmt = fmt;
s->process_data_blocks = process_data_blocks;
+ if (dir == AMDTP_OUT_STREAM)
+ s->ctx_data.rx.syt_override = -1;
+
return 0;
}
EXPORT_SYMBOL(amdtp_stream_init);
@@ -717,6 +720,9 @@ static void out_stream_callback(struct fw_iso_context *context, u32 tstamp,
if (s->flags & CIP_DBC_IS_END_EVENT)
dbc = (dbc + data_blocks) & 0xff;
+ if (s->ctx_data.rx.syt_override >= 0)
+ syt = s->ctx_data.rx.syt_override;
+
build_it_pkt_header(s, cycle, &template.params, data_blocks,
dbc, syt, i);
@@ -133,6 +133,7 @@ struct amdtp_stream {
// To generate CIP header.
unsigned int fdf;
+ int syt_override;
} rx;
} ctx_data;
@@ -428,7 +428,13 @@ int amdtp_motu_init(struct amdtp_stream *s, struct fw_unit *unit,
return err;
s->sph = 1;
- s->ctx_data.rx.fdf = MOTU_FDF_AM824;
+
+ if (dir == AMDTP_OUT_STREAM) {
+ // Use fixed value for FDF field.
+ s->ctx_data.rx.fdf = MOTU_FDF_AM824;
+ // Not used.
+ s->ctx_data.rx.syt_override = 0xffff;
+ }
return 0;
}
@@ -220,8 +220,12 @@ int amdtp_tscm_init(struct amdtp_stream *s, struct fw_unit *unit,
if (err < 0)
return 0;
- /* Use fixed value for FDF field. */
- s->ctx_data.rx.fdf = 0x00;
+ if (dir == AMDTP_OUT_STREAM) {
+ // Use fixed value for FDF field.
+ s->ctx_data.rx.fdf = 0x00;
+ // Not used.
+ s->ctx_data.rx.syt_override = 0x0000;
+ }
/* This protocol uses fixed number of data channels for PCM samples. */
p = s->protocol;
Some protocols don't use syt field of CIP header to represent presentation timestamp. For such protocol, ALSA IEC 61883-1/6 packet streaming engine uses a pointer into local variable for the value of syt to call data block processing layer. However, it can decide the value when initializing packet streaming layer. This commit adds 'syt_override' member for packet streaming layer. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> --- sound/firewire/amdtp-stream.c | 6 ++++++ sound/firewire/amdtp-stream.h | 1 + sound/firewire/motu/amdtp-motu.c | 8 +++++++- sound/firewire/tascam/amdtp-tascam.c | 8 ++++++-- 4 files changed, 20 insertions(+), 3 deletions(-)