diff options
author | Andrej Krutak <dev@andree.sk> | 2016-09-18 21:59:23 +0300 |
---|---|---|
committer | Takashi Iwai <tiwai@suse.de> | 2016-09-20 00:00:10 +0300 |
commit | 7a0f55aeeb8f1fa32a119d34ddfefc6100936692 (patch) | |
tree | c09d5ec340198bad9fde8f47f9098233cb6859ab /sound | |
parent | 79faa2b048b23f28a24a7b232d8933cb53df95b7 (diff) | |
download | linux-7a0f55aeeb8f1fa32a119d34ddfefc6100936692.tar.xz |
ALSA: line6: Support assymetrical in/out configurations
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>
Diffstat (limited to 'sound')
-rw-r--r-- | sound/usb/line6/capture.c | 10 | ||||
-rw-r--r-- | sound/usb/line6/pcm.c | 33 | ||||
-rw-r--r-- | sound/usb/line6/pcm.h | 5 | ||||
-rw-r--r-- | sound/usb/line6/playback.c | 2 |
4 files changed, 28 insertions, 22 deletions
diff --git a/sound/usb/line6/capture.c b/sound/usb/line6/capture.c index 596bc53d0775..8f9647853acd 100644 --- a/sound/usb/line6/capture.c +++ b/sound/usb/line6/capture.c @@ -44,13 +44,13 @@ static int submit_audio_in_urb(struct snd_line6_pcm *line6pcm) struct usb_iso_packet_descriptor *fin = &urb_in->iso_frame_desc[i]; fin->offset = urb_size; - fin->length = line6pcm->max_packet_size; - urb_size += line6pcm->max_packet_size; + fin->length = line6pcm->max_packet_size_in; + urb_size += line6pcm->max_packet_size_in; } urb_in->transfer_buffer = line6pcm->in.buffer + - index * LINE6_ISO_PACKETS * line6pcm->max_packet_size; + index * LINE6_ISO_PACKETS * line6pcm->max_packet_size_in; urb_in->transfer_buffer_length = urb_size; urb_in->context = line6pcm; @@ -173,10 +173,10 @@ static void audio_in_callback(struct urb *urb) fbuf = urb->transfer_buffer + fin->offset; fsize = fin->actual_length; - if (fsize > line6pcm->max_packet_size) { + if (fsize > line6pcm->max_packet_size_in) { dev_err(line6pcm->line6->ifcdev, "driver and/or device bug: packet too large (%d > %d)\n", - fsize, line6pcm->max_packet_size); + fsize, line6pcm->max_packet_size_in); } length += fsize; diff --git a/sound/usb/line6/pcm.c b/sound/usb/line6/pcm.c index 317ba68446c6..a5a44309bc9d 100644 --- a/sound/usb/line6/pcm.c +++ b/sound/usb/line6/pcm.c @@ -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); diff --git a/sound/usb/line6/pcm.h b/sound/usb/line6/pcm.h index f41e34166d68..f040c81a4843 100644 --- a/sound/usb/line6/pcm.h +++ b/sound/usb/line6/pcm.h @@ -156,11 +156,12 @@ struct snd_line6_pcm { /* Previously captured frame (for software monitoring) */ unsigned char *prev_fbuf; - /* Size of previously captured frame (for software monitoring) */ + /* Size of previously captured frame (for software monitoring/sync) */ int prev_fsize; /* Maximum size of USB packet */ - int max_packet_size; + int max_packet_size_in; + int max_packet_size_out; /* PCM playback volume (left and right) */ int volume_playback[2]; diff --git a/sound/usb/line6/playback.c b/sound/usb/line6/playback.c index 6048d0fe4068..08bacf3b025e 100644 --- a/sound/usb/line6/playback.c +++ b/sound/usb/line6/playback.c @@ -195,7 +195,7 @@ static int submit_audio_out_urb(struct snd_line6_pcm *line6pcm) urb_frames = urb_size / bytes_per_frame; urb_out->transfer_buffer = line6pcm->out.buffer + - index * LINE6_ISO_PACKETS * line6pcm->max_packet_size; + index * LINE6_ISO_PACKETS * line6pcm->max_packet_size_out; urb_out->transfer_buffer_length = urb_size; urb_out->context = line6pcm; |