/*
* dice_midi.c - a part of driver for Dice based devices
*
* Copyright (c) 2014 Takashi Sakamoto
*
* Licensed under the terms of the GNU General Public License, version 2.
*/
#include "dice.h"
static int midi_open(struct snd_rawmidi_substream *substream)
{
struct snd_dice *dice = substream->rmidi->private_data;
int err;
err = snd_dice_stream_lock_try(dice);
if (err < 0)
return err;
mutex_lock(&dice->mutex);
dice->substreams_counter++;
err = snd_dice_stream_start_duplex(dice, 0);
mutex_unlock(&dice->mutex);
if (err < 0)
snd_dice_stream_lock_release(dice);
return err;
}
static int midi_close(struct snd_rawmidi_substream *substream)
{
struct snd_dice *dice = substream->rmidi->private_data;
mutex_lock(&dice->mutex);
dice->substreams_counter--;
snd_dice_stream_stop_duplex(dice);
mutex_unlock(&dice->mutex);
snd_dice_stream_lock_release(dice);
return 0;
}
static void midi_capture_trigger(struct snd_rawmidi_substream *substrm, int up)
{
struct snd_dice *dice = substrm->rmidi->private_data;
unsigned long flags;
spin_lock_irqsave(&dice->lock, flags);
if (up)
amdtp_am824_midi_trigger(&dice->tx_stream[0],
substrm->number, substrm);
else
amdtp_am824_midi_trigger(&dice->tx_stream[0],
substrm->number, NULL);
spin_unlock_irqrestore(&dice->lock, flags);
}
static void midi_playback_trigger(struct snd_rawmidi_substream *substrm, int up)
{
struct snd_dice *dice = substrm->rmidi->private_data;
unsigned long flags;
spin_lock_irqsave(&dice->lock, flags);
if (up)
amdtp_am824_midi_trigger(&dice->rx_stream[0],
substrm->number, substrm);
else
amdtp_am824_midi_trigger(&dice->rx_stream[0],
substrm->number, NULL);
spin_unlock_irqrestore(&dice->lock, flags);
}
static struct snd_rawmidi_ops capture_ops = {
.open = midi_open,
.close = midi_close,
.trigger = midi_capture_trigger,
};
static struct snd_rawmidi_ops playback_ops = {
.open = midi_open,
.close = midi_close,
.trigger = midi_playback_trigger,
};
static void set_midi_substream_names(struct snd_dice *dice,
struct snd_rawmidi_str *str)
{
struct snd_rawmidi_substream *subs;
list_for_each_entry(subs, &str->substreams, list) {
snprintf(subs->name, sizeof(subs->name),
"%s MIDI %d", dice->card->shortname, subs->number + 1);
}
}
int snd_dice_create_midi(struct snd_dice *dice)
{
__be32 reg;
struct snd_rawmidi *rmidi;
struct snd_rawmidi_str *str;
unsigned int midi_in_ports, midi_out_ports;
int err;
/*
* Use the number of MIDI conformant data channel at current sampling
* transfer frequency.
*/
err = snd_dice_transaction_read_tx(dice, TX_NUMBER_MIDI,
®, sizeof(reg));
if (err < 0)
return err;
midi_in_ports = be32_to_cpu(reg);
err = snd_dice_transaction_read_rx(dice, RX_NUMBER_MIDI,
®, sizeof(reg));
if (err < 0)
return err;
midi_out_ports = be32_to_cpu(reg);
if (midi_in_ports + midi_out_ports == 0)
return 0;
/* create midi ports */
err = snd_rawmidi_new(dice->card, dice->card->driver, 0,
midi_out_ports, midi_in_ports,
&rmidi);
if (err < 0)
return err;
snprintf(rmidi->name, sizeof(rmidi->name),
"%s MIDI", dice->card->shortname);
rmidi->private_data = dice;
if (midi_in_ports > 0) {
rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT;
snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
&capture_ops);
str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT];
set_midi_substream_names(dice, str);
}
if (midi_out_ports > 0) {
rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT;
snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
&playback_ops);
str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT];
set_midi_substream_names(dice, str);
}
if ((midi_out_ports > 0) && (midi_in_ports > 0))
rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX;
return 0;
}
e>context: 1 2 3 4 5 6 7 8 9 10 15 20 25 30 35 40 space: include ignore mode: unified ssdiff stat only cpu/hotplug: Provide dynamic range for prepare stage
Mathieu reported that the LTTNG modules are broken as of 4.10-rc1 due to
the removal of the cpu hotplug notifiers.
Usually I don't care much about out of tree modules, but LTTNG is widely
used in distros. There are two ways to solve that:
1) Reserve a hotplug state for LTTNG
2) Add a dynamic range for the prepare states.
While #1 is the simplest solution, #2 is the proper one as we can convert
in tree users, which do not care about ordering, to the dynamic range as
well.
Add a dynamic range which allows LTTNG to request states in the prepare
stage.
Reported-and-tested-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sebastian Sewior <bigeasy@linutronix.de>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/alpine.DEB.2.20.1701101353010.3401@nanos
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>