/*
* tascam-midi.c - a part of driver for TASCAM FireWire series
*
* Copyright (c) 2015 Takashi Sakamoto
*
* Licensed under the terms of the GNU General Public License, version 2.
*/
#include "tascam.h"
static int midi_capture_open(struct snd_rawmidi_substream *substream)
{
/* Do nothing. */
return 0;
}
static int midi_playback_open(struct snd_rawmidi_substream *substream)
{
struct snd_tscm *tscm = substream->rmidi->private_data;
/* Initialize internal status. */
tscm->running_status[substream->number] = 0;
tscm->on_sysex[substream->number] = 0;
return 0;
}
static int midi_capture_close(struct snd_rawmidi_substream *substream)
{
/* Do nothing. */
return 0;
}
static int midi_playback_close(struct snd_rawmidi_substream *substream)
{
struct snd_tscm *tscm = substream->rmidi->private_data;
snd_fw_async_midi_port_finish(&tscm->out_ports[substream->number]);
return 0;
}
static void midi_capture_trigger(struct snd_rawmidi_substream *substrm, int up)
{
struct snd_tscm *tscm = substrm->rmidi->private_data;
unsigned long flags;
spin_lock_irqsave(&tscm->lock, flags);
if (up)
tscm->tx_midi_substreams[substrm->number] = substrm;
else
tscm->tx_midi_substreams[substrm->number] = NULL;
spin_unlock_irqrestore(&tscm->lock, flags);
}
static void midi_playback_trigger(struct snd_rawmidi_substream *substrm, int up)
{
struct snd_tscm *tscm = substrm->rmidi->private_data;
unsigned long flags;
spin_lock_irqsave(&tscm->lock, flags);
if (up)
snd_fw_async_midi_port_run(&tscm->out_ports[substrm->number],
substrm);
spin_unlock_irqrestore(&tscm->lock, flags);
}
static struct snd_rawmidi_ops midi_capture_ops = {
.open = midi_capture_open,
.close = midi_capture_close,
.trigger = midi_capture_trigger,
};
static struct snd_rawmidi_ops midi_playback_ops = {
.open = midi_playback_open,
.close = midi_playback_close,
.trigger = midi_playback_trigger,
};
int snd_tscm_create_midi_devices(struct snd_tscm *tscm)
{
struct snd_rawmidi *rmidi;
struct snd_rawmidi_str *stream;
struct snd_rawmidi_substream *subs;
int err;
err = snd_rawmidi_new(tscm->card, tscm->card->driver, 0,
tscm->spec->midi_playback_ports,
tscm->spec->midi_capture_ports,
&rmidi);
if (err < 0)
return err;
snprintf(rmidi->name, sizeof(rmidi->name),
"%s MIDI", tscm->card->shortname);
rmidi->private_data = tscm;
rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT;
snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
&midi_capture_ops);
stream = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT];
/* Set port names for MIDI input. */
list_for_each_entry(subs, &stream->substreams, list) {
/* TODO: support virtual MIDI ports. */
if (subs->number < tscm->spec->midi_capture_ports) {
/* Hardware MIDI ports. */
snprintf(subs->name, sizeof(subs->name),
"%s MIDI %d",
tscm->card->shortname, subs->number + 1);
}
}
rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT;
snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
&midi_playback_ops);
stream = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT];
/* Set port names for MIDI ourput. */
list_for_each_entry(subs, &stream->substreams, list) {
if (subs->number < tscm->spec->midi_playback_ports) {
/* Hardware MIDI ports only. */
snprintf(subs->name, sizeof(subs->name),
"%s MIDI %d",
tscm->card->shortname, subs->number + 1);
}
}
rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX;
return 0;
}
gi/linux/net-next.git/log/drivers/usb/gadget?h=nds-private-remove&id=8ecd4591e7612a7ea5c67589cf1a7f18bd17ba14&showmsg=1'>Expand)| Author | Files | Lines |
'>
drm: Don't race connector registration
I was under the misconception that the sysfs dev stuff can be fully
set up, and then registered all in one step with device_add. That's
true for properties and property groups, but not for parents and child
devices. Those must be fully registered before you can register a
child.
Add a bit of tracking to make sure that asynchronous mst connector
hotplugging gets this right. For consistency we rely upon the implicit
barriers of the connector->mutex, which is taken anyway, to ensure
that at least either the connector or device registration call will
work out.
Mildly tested since I can't reliably reproduce this on my mst box
here.
Reported-by: Dave Hansen <dave.hansen@intel.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Acked-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1484237756-2720-1-git-send-email-daniel.vetter@ffwll.ch