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authorTakashi Sakamoto <o-takashi@sakamocchi.jp>2019-07-22 06:36:56 +0300
committerTakashi Iwai <tiwai@suse.de>2019-07-22 17:05:00 +0300
commit3baf30532f94030244a31a275b546d042656c535 (patch)
treea8b92f5cf7c20ca9e5a190e5a9f91b2a005ff072 /sound/firewire
parenta35463d1f77d9e5244d6f4953d3c7f3a27c7625e (diff)
downloadlinux-3baf30532f94030244a31a275b546d042656c535.tar.xz
ALSA: firewire-lib: add syt_override member for some protocols
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> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/firewire')
-rw-r--r--sound/firewire/amdtp-stream.c6
-rw-r--r--sound/firewire/amdtp-stream.h1
-rw-r--r--sound/firewire/motu/amdtp-motu.c8
-rw-r--r--sound/firewire/tascam/amdtp-tascam.c8
4 files changed, 20 insertions, 3 deletions
diff --git a/sound/firewire/amdtp-stream.c b/sound/firewire/amdtp-stream.c
index 3435bef97a8b..6242240cd8ee 100644
--- a/sound/firewire/amdtp-stream.c
+++ b/sound/firewire/amdtp-stream.c
@@ -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);
diff --git a/sound/firewire/amdtp-stream.h b/sound/firewire/amdtp-stream.h
index 762ac3c7e902..5b9d4212e202 100644
--- a/sound/firewire/amdtp-stream.h
+++ b/sound/firewire/amdtp-stream.h
@@ -133,6 +133,7 @@ struct amdtp_stream {
// To generate CIP header.
unsigned int fdf;
+ int syt_override;
} rx;
} ctx_data;
diff --git a/sound/firewire/motu/amdtp-motu.c b/sound/firewire/motu/amdtp-motu.c
index 9693f37a0032..683873699885 100644
--- a/sound/firewire/motu/amdtp-motu.c
+++ b/sound/firewire/motu/amdtp-motu.c
@@ -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;
}
diff --git a/sound/firewire/tascam/amdtp-tascam.c b/sound/firewire/tascam/amdtp-tascam.c
index 3a4d1f855f79..8fba6fb8ba8a 100644
--- a/sound/firewire/tascam/amdtp-tascam.c
+++ b/sound/firewire/tascam/amdtp-tascam.c
@@ -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;