[PATCH v2 7/9] ALSA: virtio: introduce jack support
Anton Yakovlev
anton.yakovlev at opensynergy.com
Sun Jan 24 17:54:06 CET 2021
Enumerate all available jacks and create ALSA controls.
At the moment jacks have a simple implementation and can only be used
to receive notifications about a plugged in/out device.
Signed-off-by: Anton Yakovlev <anton.yakovlev at opensynergy.com>
---
sound/virtio/Makefile | 1 +
sound/virtio/virtio_card.c | 18 +++
sound/virtio/virtio_card.h | 12 ++
sound/virtio/virtio_jack.c | 255 +++++++++++++++++++++++++++++++++++++
4 files changed, 286 insertions(+)
create mode 100644 sound/virtio/virtio_jack.c
diff --git a/sound/virtio/Makefile b/sound/virtio/Makefile
index 34493226793f..09f485291285 100644
--- a/sound/virtio/Makefile
+++ b/sound/virtio/Makefile
@@ -5,6 +5,7 @@ obj-$(CONFIG_SND_VIRTIO) += virtio_snd.o
virtio_snd-objs := \
virtio_card.o \
virtio_ctl_msg.o \
+ virtio_jack.o \
virtio_pcm.o \
virtio_pcm_msg.o \
virtio_pcm_ops.o
diff --git a/sound/virtio/virtio_card.c b/sound/virtio/virtio_card.c
index 11d025ee77c2..1dd709437208 100644
--- a/sound/virtio/virtio_card.c
+++ b/sound/virtio/virtio_card.c
@@ -93,6 +93,11 @@ static void virtsnd_event_notify_cb(struct virtqueue *vqueue)
break;
switch (le32_to_cpu(event->hdr.code)) {
+ case VIRTIO_SND_EVT_JACK_CONNECTED:
+ case VIRTIO_SND_EVT_JACK_DISCONNECTED: {
+ virtsnd_jack_event(snd, event);
+ break;
+ }
case VIRTIO_SND_EVT_PCM_PERIOD_ELAPSED:
case VIRTIO_SND_EVT_PCM_XRUN: {
virtsnd_pcm_event(snd, event);
@@ -295,10 +300,20 @@ static int virtsnd_build_devs(struct virtio_snd *snd)
strscpy(snd->card->longname, "VirtIO Sound Card",
sizeof(snd->card->longname));
+ rc = virtsnd_jack_parse_cfg(snd);
+ if (rc)
+ return rc;
+
rc = virtsnd_pcm_parse_cfg(snd);
if (rc)
return rc;
+ if (snd->njacks) {
+ rc = virtsnd_jack_build_devs(snd);
+ if (rc)
+ return rc;
+ }
+
if (snd->nsubstreams) {
rc = virtsnd_pcm_build_devs(snd);
if (rc)
@@ -428,6 +443,9 @@ static void virtsnd_remove(struct virtio_device *vdev)
devm_kfree(&vdev->dev, pcm);
}
+ if (snd->jacks)
+ devm_kfree(&vdev->dev, snd->jacks);
+
if (snd->substreams)
devm_kfree(&vdev->dev, snd->substreams);
diff --git a/sound/virtio/virtio_card.h b/sound/virtio/virtio_card.h
index b11c09984882..df4b0696e8c4 100644
--- a/sound/virtio/virtio_card.h
+++ b/sound/virtio/virtio_card.h
@@ -26,6 +26,7 @@
#include "virtio_ctl_msg.h"
#include "virtio_pcm.h"
+struct virtio_jack;
struct virtio_pcm_substream;
/**
@@ -47,6 +48,8 @@ struct virtio_snd_queue {
* @ctl_msgs: Pending control request list.
* @event_msgs: Device events.
* @pcm_list: VirtIO PCM device list.
+ * @jacks: VirtIO jacks.
+ * @njacks: Number of jacks.
* @substreams: VirtIO PCM substreams.
* @nsubstreams: Number of PCM substreams.
*/
@@ -58,6 +61,8 @@ struct virtio_snd {
struct list_head ctl_msgs;
struct virtio_snd_event *event_msgs;
struct list_head pcm_list;
+ struct virtio_jack *jacks;
+ unsigned int njacks;
struct virtio_pcm_substream *substreams;
unsigned int nsubstreams;
};
@@ -98,4 +103,11 @@ virtsnd_pcm_queue(struct virtio_pcm_substream *substream)
return virtsnd_rx_queue(substream->snd);
}
+int virtsnd_jack_parse_cfg(struct virtio_snd *snd);
+
+int virtsnd_jack_build_devs(struct virtio_snd *snd);
+
+void virtsnd_jack_event(struct virtio_snd *snd,
+ struct virtio_snd_event *event);
+
#endif /* VIRTIO_SND_CARD_H */
diff --git a/sound/virtio/virtio_jack.c b/sound/virtio/virtio_jack.c
new file mode 100644
index 000000000000..83593c59f6bf
--- /dev/null
+++ b/sound/virtio/virtio_jack.c
@@ -0,0 +1,255 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Sound card driver for virtio
+ * Copyright (C) 2020 OpenSynergy GmbH
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+#include <linux/virtio_config.h>
+#include <sound/jack.h>
+#include <sound/hda_verbs.h>
+
+#include "virtio_card.h"
+
+/**
+ * DOC: Implementation Status
+ *
+ * At the moment jacks have a simple implementation and can only be used to
+ * receive notifications about a plugged in/out device.
+ *
+ * VIRTIO_SND_R_JACK_REMAP
+ * is not supported
+ */
+
+/**
+ * struct virtio_jack - VirtIO jack.
+ * @jack: Kernel jack control.
+ * @nid: Functional group node identifier.
+ * @features: Jack virtio feature bit map (1 << VIRTIO_SND_JACK_F_XXX).
+ * @defconf: Pin default configuration value.
+ * @caps: Pin capabilities value.
+ * @connected: Current jack connection status.
+ * @type: Kernel jack type (SND_JACK_XXX).
+ */
+struct virtio_jack {
+ struct snd_jack *jack;
+ unsigned int nid;
+ unsigned int features;
+ unsigned int defconf;
+ unsigned int caps;
+ bool connected;
+ int type;
+};
+
+/**
+ * virtsnd_jack_get_label() - Get the name string for the jack.
+ * @jack: VirtIO jack.
+ *
+ * Returns the jack name based on the default pin configuration value (see HDA
+ * specification).
+ *
+ * Context: Any context.
+ * Return: Name string.
+ */
+static const char *virtsnd_jack_get_label(struct virtio_jack *jack)
+{
+ unsigned int defconf = jack->defconf;
+ unsigned int device =
+ (defconf & AC_DEFCFG_DEVICE) >> AC_DEFCFG_DEVICE_SHIFT;
+ unsigned int location =
+ (defconf & AC_DEFCFG_LOCATION) >> AC_DEFCFG_LOCATION_SHIFT;
+
+ switch (device) {
+ case AC_JACK_LINE_OUT:
+ return "Line Out";
+ case AC_JACK_SPEAKER:
+ return "Speaker";
+ case AC_JACK_HP_OUT:
+ return "Headphone";
+ case AC_JACK_CD:
+ return "CD";
+ case AC_JACK_SPDIF_OUT:
+ case AC_JACK_DIG_OTHER_OUT:
+ if (location == AC_JACK_LOC_HDMI)
+ return "HDMI Out";
+ else
+ return "SPDIF Out";
+ case AC_JACK_LINE_IN:
+ return "Line";
+ case AC_JACK_AUX:
+ return "Aux";
+ case AC_JACK_MIC_IN:
+ return "Mic";
+ case AC_JACK_SPDIF_IN:
+ return "SPDIF In";
+ case AC_JACK_DIG_OTHER_IN:
+ return "Digital In";
+ default:
+ return "Misc";
+ }
+}
+
+/**
+ * virtsnd_jack_get_type() - Get the type for the jack.
+ * @jack: VirtIO jack.
+ *
+ * Returns the jack type based on the default pin configuration value (see HDA
+ * specification).
+ *
+ * Context: Any context.
+ * Return: SND_JACK_XXX value.
+ */
+static int virtsnd_jack_get_type(struct virtio_jack *jack)
+{
+ unsigned int defconf = jack->defconf;
+ unsigned int device =
+ (defconf & AC_DEFCFG_DEVICE) >> AC_DEFCFG_DEVICE_SHIFT;
+
+ switch (device) {
+ case AC_JACK_LINE_OUT:
+ case AC_JACK_SPEAKER:
+ return SND_JACK_LINEOUT;
+ case AC_JACK_HP_OUT:
+ return SND_JACK_HEADPHONE;
+ case AC_JACK_SPDIF_OUT:
+ case AC_JACK_DIG_OTHER_OUT:
+ return SND_JACK_AVOUT;
+ case AC_JACK_MIC_IN:
+ return SND_JACK_MICROPHONE;
+ default:
+ return SND_JACK_LINEIN;
+ }
+}
+
+/**
+ * virtsnd_jack_parse_cfg() - Parse the jack configuration.
+ * @snd: VirtIO sound device.
+ *
+ * This function is called during initial device initialization.
+ *
+ * Context: Any context that permits to sleep.
+ * Return: 0 on success, -errno on failure.
+ */
+int virtsnd_jack_parse_cfg(struct virtio_snd *snd)
+{
+ struct virtio_device *vdev = snd->vdev;
+ struct virtio_snd_jack_info *info;
+ unsigned int i;
+ int rc;
+
+ virtio_cread(vdev, struct virtio_snd_config, jacks, &snd->njacks);
+ if (!snd->njacks)
+ return 0;
+
+ snd->jacks = devm_kcalloc(&vdev->dev, snd->njacks, sizeof(*snd->jacks),
+ GFP_KERNEL);
+ if (!snd->jacks)
+ return -ENOMEM;
+
+ info = devm_kcalloc(&vdev->dev, snd->njacks, sizeof(*info), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+
+ rc = virtsnd_ctl_query_info(snd, VIRTIO_SND_R_JACK_INFO, 0, snd->njacks,
+ sizeof(*info), info);
+ if (rc)
+ return rc;
+
+ for (i = 0; i < snd->njacks; ++i) {
+ struct virtio_jack *jack = &snd->jacks[i];
+ struct virtio_pcm *pcm;
+
+ jack->nid = le32_to_cpu(info[i].hdr.hda_fn_nid);
+ jack->features = le32_to_cpu(info[i].features);
+ jack->defconf = le32_to_cpu(info[i].hda_reg_defconf);
+ jack->caps = le32_to_cpu(info[i].hda_reg_caps);
+ jack->connected = info[i].connected;
+
+ pcm = virtsnd_pcm_find_or_create(snd, jack->nid);
+ if (IS_ERR(pcm))
+ return PTR_ERR(pcm);
+ }
+
+ devm_kfree(&vdev->dev, info);
+
+ return 0;
+}
+
+/**
+ * virtsnd_jack_build_devs() - Build ALSA controls for jacks.
+ * @snd: VirtIO sound device.
+ *
+ * Context: Any context that permits to sleep.
+ * Return: 0 on success, -errno on failure.
+ */
+int virtsnd_jack_build_devs(struct virtio_snd *snd)
+{
+ unsigned int i;
+ int rc;
+
+ for (i = 0; i < snd->njacks; ++i) {
+ struct virtio_jack *jack = &snd->jacks[i];
+
+ jack->type = virtsnd_jack_get_type(jack);
+
+ rc = snd_jack_new(snd->card, virtsnd_jack_get_label(jack),
+ jack->type, &jack->jack, true, true);
+ if (rc)
+ return rc;
+
+ if (!jack->jack)
+ continue;
+
+ jack->jack->private_data = jack;
+
+ snd_jack_report(jack->jack,
+ jack->connected ? jack->type : 0);
+ }
+
+ return 0;
+}
+
+/**
+ * virtsnd_jack_event() - Handle the jack event notification.
+ * @snd: VirtIO sound device.
+ * @event: VirtIO sound event.
+ *
+ * Context: Interrupt context.
+ */
+void virtsnd_jack_event(struct virtio_snd *snd, struct virtio_snd_event *event)
+{
+ unsigned int jack_id = le32_to_cpu(event->data);
+ struct virtio_jack *jack;
+
+ if (jack_id >= snd->njacks)
+ return;
+
+ jack = &snd->jacks[jack_id];
+
+ switch (le32_to_cpu(event->hdr.code)) {
+ case VIRTIO_SND_EVT_JACK_CONNECTED: {
+ jack->connected = true;
+ break;
+ }
+ case VIRTIO_SND_EVT_JACK_DISCONNECTED: {
+ jack->connected = false;
+ break;
+ }
+ default: {
+ return;
+ }
+ }
+
+ snd_jack_report(jack->jack, jack->connected ? jack->type : 0);
+}
--
2.30.0
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