/* * oxfw_midi.c - a part of driver for OXFW970/971 based devices * * Copyright (c) 2014 Takashi Sakamoto * * Licensed under the terms of the GNU General Public License, version 2. */ #include "oxfw.h" static int midi_capture_open(struct snd_rawmidi_substream *substream) { struct snd_oxfw *oxfw = substream->rmidi->private_data; int err; err = snd_oxfw_stream_lock_try(oxfw); if (err < 0) return err; mutex_lock(&oxfw->mutex); oxfw->capture_substreams++; err = snd_oxfw_stream_start_simplex(oxfw, &oxfw->tx_stream, 0, 0); mutex_unlock(&oxfw->mutex); if (err < 0) snd_oxfw_stream_lock_release(oxfw); return err; } static int midi_playback_open(struct snd_rawmidi_substream *substream) { struct snd_oxfw *oxfw = substream->rmidi->private_data; int err; err = snd_oxfw_stream_lock_try(oxfw); if (err < 0) return err; mutex_lock(&oxfw->mutex); oxfw->playback_substreams++; err = snd_oxfw_stream_start_simplex(oxfw, &oxfw->rx_stream, 0, 0); mutex_unlock(&oxfw->mutex); if (err < 0) snd_oxfw_stream_lock_release(oxfw); return err; } static int midi_capture_close(struct snd_rawmidi_substream *substream) { struct snd_oxfw *oxfw = substream->rmidi->private_data; mutex_lock(&oxfw->mutex); oxfw->capture_substreams--; snd_oxfw_stream_stop_simplex(oxfw, &oxfw->tx_stream); mutex_unlock(&oxfw->mutex); snd_oxfw_stream_lock_release(oxfw); return 0; } static int midi_playback_close(struct snd_rawmidi_substream *substream) { struct snd_oxfw *oxfw = substream->rmidi->private_data; mutex_lock(&oxfw->mutex); oxfw->playback_substreams--; snd_oxfw_stream_stop_simplex(oxfw, &oxfw->rx_stream); mutex_unlock(&oxfw->mutex); snd_oxfw_stream_lock_release(oxfw); return 0; } static void midi_capture_trigger(struct snd_rawmidi_substream *substrm, int up) { struct snd_oxfw *oxfw = substrm->rmidi->private_data; unsigned long flags; spin_lock_irqsave(&oxfw->lock, flags); if (up) amdtp_am824_midi_trigger(&oxfw->tx_stream, substrm->number, substrm); else amdtp_am824_midi_trigger(&oxfw->tx_stream, substrm->number, NULL); spin_unlock_irqrestore(&oxfw->lock, flags); } static void midi_playback_trigger(struct snd_rawmidi_substream *substrm, int up) { struct snd_oxfw *oxfw = substrm->rmidi->private_data; unsigned long flags; spin_lock_irqsave(&oxfw->lock, flags); if (up) amdtp_am824_midi_trigger(&oxfw->rx_stream, substrm->number, substrm); else amdtp_am824_midi_trigger(&oxfw->rx_stream, substrm->number, NULL); spin_unlock_irqrestore(&oxfw->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, }; static void set_midi_substream_names(struct snd_oxfw *oxfw, 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", oxfw->card->shortname, subs->number + 1); } } int snd_oxfw_create_midi(struct snd_oxfw *oxfw) { struct snd_rawmidi *rmidi; struct snd_rawmidi_str *str; int err; if (oxfw->midi_input_ports == 0 && oxfw->midi_output_ports == 0) return 0; /* create midi ports */ err = snd_rawmidi_new(oxfw->card, oxfw->card->driver, 0, oxfw->midi_output_ports, oxfw->midi_input_ports, &rmidi); if (err < 0) return err; snprintf(rmidi->name, sizeof(rmidi->name), "%s MIDI", oxfw->card->shortname); rmidi->private_data = oxfw; if (oxfw->midi_input_ports > 0) { rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT; snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &midi_capture_ops); str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]; set_midi_substream_names(oxfw, str); } if (oxfw->midi_output_ports > 0) { rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT; snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &midi_playback_ops); str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]; set_midi_substream_names(oxfw, str); } if ((oxfw->midi_output_ports > 0) && (oxfw->midi_input_ports > 0)) rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX; return 0; } lue='0' selected='selected'>unified
authorDaniel Vetter <daniel.vetter@ffwll.ch>2016-12-18 14:35:45 +0100
committerDaniel Vetter <daniel.vetter@ffwll.ch>2017-01-30 10:17:17 +0100
commit4e5b54f127426c82dc2816340c26d951a5bb3429 (patch)
treecc3a8f7e335cf12880bc8d1a1e2066f6cfe0a68e /sound/soc/sirf/Makefile
parent566cf877a1fcb6d6dc0126b076aad062054c2637 (diff)
drm: prevent double-(un)registration for connectors
If we're unlucky then the registration from a hotplugged connector might race with the final registration step on driver load. And since MST topology discover is asynchronous that's even somewhat likely. v2: Also update the kerneldoc for @registered! v3: Review from Chris: - Improve kerneldoc for late_register/early_unregister callbacks. - Use mutex_destroy. Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Sean Paul <seanpaul@chromium.org> Reported-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20161218133545.2106-1-daniel.vetter@ffwll.ch (cherry picked from commit e73ab00e9a0f1731f34d0620a9c55f5c30c4ad4e)
Diffstat (limited to 'sound/soc/sirf/Makefile')