Miglia Harmony Audio does neither support AV/C Stream Format Information command nor AV/C Extended Stream Format Information command.
This commit adds a workaround for the case and uses the hard-coded formats.
Signed-off-by: Takashi Sakamoto o-takashi@sakamocchi.jp --- sound/firewire/oxfw/oxfw-stream.c | 96 +++++++++++++++++++++++-------- sound/firewire/oxfw/oxfw.h | 2 + 2 files changed, 75 insertions(+), 23 deletions(-)
diff --git a/sound/firewire/oxfw/oxfw-stream.c b/sound/firewire/oxfw/oxfw-stream.c index 6d8722f9d3a5..40716bb989c7 100644 --- a/sound/firewire/oxfw/oxfw-stream.c +++ b/sound/firewire/oxfw/oxfw-stream.c @@ -486,26 +486,57 @@ int snd_oxfw_stream_get_current_formation(struct snd_oxfw *oxfw, enum avc_general_plug_dir dir, struct snd_oxfw_stream_formation *formation) { - u8 *format; - unsigned int len; int err;
- len = AVC_GENERIC_FRAME_MAXIMUM_BYTES; - format = kmalloc(len, GFP_KERNEL); - if (format == NULL) - return -ENOMEM; + if (!(oxfw->quirks & SND_OXFW_QUIRK_STREAM_FORMAT_INFO_UNSUPPORTED)) { + u8 *format; + unsigned int len;
- err = avc_stream_get_format_single(oxfw->unit, dir, 0, format, &len); - if (err < 0) - goto end; - if (len < 3) { - err = -EIO; - goto end; + len = AVC_GENERIC_FRAME_MAXIMUM_BYTES; + format = kmalloc(len, GFP_KERNEL); + if (format == NULL) + return -ENOMEM; + + err = avc_stream_get_format_single(oxfw->unit, dir, 0, format, &len); + if (err >= 0) { + if (len < 3) + err = -EIO; + else + err = snd_oxfw_stream_parse_format(format, formation); + } + + kfree(format); + } else { + // Miglia Harmony Audio does not support Extended Stream Format Information + // command. Use the duplicated hard-coded format, instead. + unsigned int rate; + u8 *const *formats; + int i; + + err = avc_general_get_sig_fmt(oxfw->unit, &rate, dir, 0); + if (err < 0) + return err; + + if (dir == AVC_GENERAL_PLUG_DIR_IN) + formats = oxfw->rx_stream_formats; + else + formats = oxfw->tx_stream_formats; + + for (i = 0; (i < SND_OXFW_STREAM_FORMAT_ENTRIES); ++i) { + if (!formats[i]) + continue; + + err = snd_oxfw_stream_parse_format(formats[i], formation); + if (err < 0) + continue; + + if (formation->rate == rate) + break; + } + if (i == SND_OXFW_STREAM_FORMAT_ENTRIES) + return -EIO; }
- err = snd_oxfw_stream_parse_format(format, formation); -end: - kfree(format); return err; }
@@ -600,14 +631,33 @@ assume_stream_formats(struct snd_oxfw *oxfw, enum avc_general_plug_dir dir, unsigned int i, eid; int err;
- /* get format at current sampling rate */ - err = avc_stream_get_format_single(oxfw->unit, dir, pid, buf, len); - if (err < 0) { - dev_err(&oxfw->unit->device, - "fail to get current stream format for isoc %s plug %d:%d\n", - (dir == AVC_GENERAL_PLUG_DIR_IN) ? "in" : "out", - pid, err); - goto end; + // get format at current sampling rate. + if (!(oxfw->quirks & SND_OXFW_QUIRK_STREAM_FORMAT_INFO_UNSUPPORTED)) { + err = avc_stream_get_format_single(oxfw->unit, dir, pid, buf, len); + if (err < 0) { + dev_err(&oxfw->unit->device, + "fail to get current stream format for isoc %s plug %d:%d\n", + (dir == AVC_GENERAL_PLUG_DIR_IN) ? "in" : "out", + pid, err); + goto end; + } + } else { + // Miglia Harmony Audio does not support Extended Stream Format Information + // command. Use the hard-coded format, instead. + buf[0] = 0x90; + buf[1] = 0x40; + buf[2] = avc_stream_rate_table[0]; + buf[3] = 0x00; + buf[4] = 0x01; + + if (dir == AVC_GENERAL_PLUG_DIR_IN) + buf[5] = 0x08; + else + buf[5] = 0x02; + + buf[6] = 0x06; + + *len = 7; }
/* parse and set stream format */ diff --git a/sound/firewire/oxfw/oxfw.h b/sound/firewire/oxfw/oxfw.h index 39316aeafeaa..3bf8d7bec636 100644 --- a/sound/firewire/oxfw/oxfw.h +++ b/sound/firewire/oxfw/oxfw.h @@ -52,6 +52,8 @@ enum snd_oxfw_quirk { // performs media clock recovery voluntarily. In the recovery, the packets with NO_INFO // are ignored, thus driver should transfer packets with timestamp. SND_OXFW_QUIRK_VOLUNTARY_RECOVERY = 0x20, + // Miglia Harmony Audio does not support AV/C Stream Format Information command. + SND_OXFW_QUIRK_STREAM_FORMAT_INFO_UNSUPPORTED = 0x40, };
/* This is an arbitrary number for convinience. */