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authorRuslan Bilovol <ruslan.bilovol@gmail.com>2018-05-04 04:23:58 +0300
committerTakashi Iwai <tiwai@suse.de>2018-05-04 09:38:44 +0200
commit4d47fa8447691198c710daa62fab82fcc0f3f868 (patch)
treeeb7c2ca018706d2e6309d6dacc352b5a78941c5d /sound/usb/stream.c
parent8c558076c740e8009a96c6fdc3d4245dde62be77 (diff)
downloadlinux-4d47fa8447691198c710daa62fab82fcc0f3f868.tar.bz2
ALSA: usb: stream: move audioformat alloc/init into separate function
Offload snd_usb_parse_audio_interface() function which became quite long after adding UAC3 spec support. Move audioformat allocation and initialization into separate function, this will make easier future refactoring. Attributes left in the original func because it'll be used for UAC3 BADD profiles suport in the future There is no functional change. Signed-off-by: Ruslan Bilovol <ruslan.bilovol@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/usb/stream.c')
-rw-r--r--sound/usb/stream.c52
1 files changed, 36 insertions, 16 deletions
diff --git a/sound/usb/stream.c b/sound/usb/stream.c
index 956be9f7c72a..8ec0a5206ebe 100644
--- a/sound/usb/stream.c
+++ b/sound/usb/stream.c
@@ -626,6 +626,37 @@ snd_usb_find_output_terminal_descriptor(struct usb_host_interface *ctrl_iface,
return NULL;
}
+static struct audioformat *
+audio_format_alloc_init(struct snd_usb_audio *chip,
+ struct usb_host_interface *alts,
+ int protocol, int iface_no, int altset_idx,
+ int altno, int num_channels, int clock)
+{
+ struct audioformat *fp;
+
+ fp = kzalloc(sizeof(*fp), GFP_KERNEL);
+ if (!fp)
+ return NULL;
+
+ fp->iface = iface_no;
+ fp->altsetting = altno;
+ fp->altset_idx = altset_idx;
+ fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
+ fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
+ fp->datainterval = snd_usb_parse_datainterval(chip, alts);
+ fp->protocol = protocol;
+ fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
+ fp->channels = num_channels;
+ if (snd_usb_get_speed(chip->dev) == USB_SPEED_HIGH)
+ fp->maxpacksize = (((fp->maxpacksize >> 11) & 3) + 1)
+ * (fp->maxpacksize & 0x7ff);
+ fp->clock = clock;
+ INIT_LIST_HEAD(&fp->list);
+
+ return fp;
+}
+
+
int snd_usb_parse_audio_interface(struct snd_usb_audio *chip, int iface_no)
{
struct usb_device *dev;
@@ -928,25 +959,14 @@ int snd_usb_parse_audio_interface(struct snd_usb_audio *chip, int iface_no)
continue;
}
- fp = kzalloc(sizeof(*fp), GFP_KERNEL);
+ fp = audio_format_alloc_init(chip, alts, protocol, iface_no, i,
+ altno, num_channels, clock);
if (!fp)
return -ENOMEM;
- fp->iface = iface_no;
- fp->altsetting = altno;
- fp->altset_idx = i;
- fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
- fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
- fp->datainterval = snd_usb_parse_datainterval(chip, alts);
- fp->protocol = protocol;
- fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
- fp->channels = num_channels;
- if (snd_usb_get_speed(dev) == USB_SPEED_HIGH)
- fp->maxpacksize = (((fp->maxpacksize >> 11) & 3) + 1)
- * (fp->maxpacksize & 0x7ff);
- fp->attributes = parse_uac_endpoint_attributes(chip, alts, protocol, iface_no);
- fp->clock = clock;
- INIT_LIST_HEAD(&fp->list);
+ fp->attributes = parse_uac_endpoint_attributes(chip, alts,
+ protocol,
+ iface_no);
/* some quirks for attributes here */
snd_usb_audioformat_attributes_quirk(chip, fp, stream);