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| author | Takashi Sakamoto | 2014-12-08 16:10:43 +0100 |
|---|---|---|
| committer | Takashi Iwai | 2014-12-10 10:47:54 +0100 |
| commit | 3c96101f190020e91d413c5835f7a722fc007923 (patch) | |
| tree | 00aaf93b5806daa8c1f750e08c1ee50332a96747 /sound/firewire/oxfw/oxfw-stream.c | |
| parent | ALSA: oxfw: Change the way to make PCM rules/constraints (diff) | |
| download | kernel-qcow2-linux-3c96101f190020e91d413c5835f7a722fc007923.tar.gz kernel-qcow2-linux-3c96101f190020e91d413c5835f7a722fc007923.tar.xz kernel-qcow2-linux-3c96101f190020e91d413c5835f7a722fc007923.zip | |
ALSA: oxfw: Add proc interface for debugging purpose
This commit adds proc interface to get information about stream
formation. This commit also adds snd_oxfw_stream_get_current_formation()
to get current stream formation.
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Acked-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/firewire/oxfw/oxfw-stream.c')
| -rw-r--r-- | sound/firewire/oxfw/oxfw-stream.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/sound/firewire/oxfw/oxfw-stream.c b/sound/firewire/oxfw/oxfw-stream.c index 17e3802e6ac2..210bf5a2f56e 100644 --- a/sound/firewire/oxfw/oxfw-stream.c +++ b/sound/firewire/oxfw/oxfw-stream.c @@ -108,6 +108,33 @@ void snd_oxfw_stream_update_simplex(struct snd_oxfw *oxfw) amdtp_stream_update(&oxfw->rx_stream); } +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; + + err = avc_stream_get_format_single(oxfw->unit, dir, 0, format, &len); + if (err < 0) + goto end; + if (len < 3) { + err = -EIO; + goto end; + } + + err = snd_oxfw_stream_parse_format(format, formation); +end: + kfree(format); + return err; +} + /* * See Table 6.16 - AM824 Stream Format * Figure 6.19 - format_information field for AM824 Compound |