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ALSA: line6: Support assymetrical in/out configurations

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Splits max_packet_size to max_packet_size_in/out (e.g. for
different channel counts).

Signed-off-by: Andrej Krutak <dev@andree.sk>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Andrej Krutak
2016-09-18 20:59:23 +02:00
committed by Takashi Iwai
parent 79faa2b048
commit 7a0f55aeeb
4 changed files with 28 additions and 22 deletions
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33
sound/usb/line6/pcm.c
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@@ -146,16 +146,20 @@ get_stream(struct snd_line6_pcm *line6pcm, int direction)
}
/* allocate a buffer if not opened yet;
* call this in line6pcm.state_change mutex
* call this in line6pcm.state_mutex
*/
static int line6_buffer_acquire(struct snd_line6_pcm *line6pcm,
struct line6_pcm_stream *pstr, int type)
struct line6_pcm_stream *pstr, int direction, int type)
{
const int pkt_size =
(direction == SNDRV_PCM_STREAM_PLAYBACK) ?
line6pcm->max_packet_size_out :
line6pcm->max_packet_size_in;
/* Invoked multiple times in a row so allocate once only */
if (!test_and_set_bit(type, &pstr->opened) && !pstr->buffer) {
pstr->buffer = kmalloc(line6pcm->line6->iso_buffers *
LINE6_ISO_PACKETS *
line6pcm->max_packet_size, GFP_KERNEL);
LINE6_ISO_PACKETS * pkt_size, GFP_KERNEL);
if (!pstr->buffer)
return -ENOMEM;
}
@@ -163,12 +167,11 @@ static int line6_buffer_acquire(struct snd_line6_pcm *line6pcm,
}
/* free a buffer if all streams are closed;
* call this in line6pcm.state_change mutex
* call this in line6pcm.state_mutex
*/
static void line6_buffer_release(struct snd_line6_pcm *line6pcm,
struct line6_pcm_stream *pstr, int type)
{
clear_bit(type, &pstr->opened);
if (!pstr->opened) {
line6_wait_clear_audio_urbs(line6pcm, pstr);
@@ -195,6 +198,7 @@ static int line6_stream_start(struct snd_line6_pcm *line6pcm, int direction,
else
ret = line6_submit_audio_in_all_urbs(line6pcm);
}
if (ret < 0)
clear_bit(type, &pstr->running);
spin_unlock_irqrestore(&pstr->lock, flags);
@@ -290,7 +294,7 @@ int line6_pcm_acquire(struct snd_line6_pcm *line6pcm, int type)
mutex_lock(&line6pcm->state_mutex);
for (dir = 0; dir < 2; dir++) {
pstr = get_stream(line6pcm, dir);
ret = line6_buffer_acquire(line6pcm, pstr, type);
ret = line6_buffer_acquire(line6pcm, pstr, dir, type);
if (ret < 0)
goto error;
if (!pstr->running)
@@ -335,7 +339,8 @@ int snd_line6_hw_params(struct snd_pcm_substream *substream,
struct line6_pcm_stream *pstr = get_stream(line6pcm, substream->stream);
mutex_lock(&line6pcm->state_mutex);
ret = line6_buffer_acquire(line6pcm, pstr, LINE6_STREAM_PCM);
ret = line6_buffer_acquire(line6pcm, pstr, substream->stream,
LINE6_STREAM_PCM);
if (ret < 0)
goto error;
@@ -530,12 +535,12 @@ int line6_init_pcm(struct usb_line6 *line6,
line6pcm->volume_monitor = 255;
line6pcm->line6 = line6;
/* Read and write buffers are sized identically, so choose minimum */
line6pcm->max_packet_size = min(
usb_maxpacket(line6->usbdev,
usb_rcvisocpipe(line6->usbdev, ep_read), 0),
usb_maxpacket(line6->usbdev,
usb_sndisocpipe(line6->usbdev, ep_write), 1));
line6pcm->max_packet_size_in =
usb_maxpacket(line6->usbdev,
usb_rcvisocpipe(line6->usbdev, ep_read), 0);
line6pcm->max_packet_size_out =
usb_maxpacket(line6->usbdev,
usb_sndisocpipe(line6->usbdev, ep_write), 1);
spin_lock_init(&line6pcm->out.lock);
spin_lock_init(&line6pcm->in.lock);