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ALSA: virtio: introduce jack support
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 <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Takashi Iwai <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,233 @@ | ||
| // SPDX-License-Identifier: GPL-2.0+ | ||
| /* | ||
| * virtio-snd: Virtio sound device | ||
| * Copyright (C) 2021 OpenSynergy GmbH | ||
| */ | ||
| #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; | ||
| u32 nid; | ||
| u32 features; | ||
| u32 defconf; | ||
| u32 caps; | ||
| bool connected; | ||
| int type; | ||
| }; | ||
|
|
||
| /** | ||
| * virtsnd_jack_get_label() - Get the name string for the jack. | ||
| * @vjack: 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 *vjack) | ||
| { | ||
| unsigned int defconf = vjack->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. | ||
| * @vjack: 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 *vjack) | ||
| { | ||
| unsigned int defconf = vjack->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; | ||
| u32 i; | ||
| int rc; | ||
|
|
||
| virtio_cread_le(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 = kcalloc(snd->njacks, sizeof(*info), GFP_KERNEL); | ||
| if (!info) | ||
| return -ENOMEM; | ||
|
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| rc = virtsnd_ctl_query_info(snd, VIRTIO_SND_R_JACK_INFO, 0, snd->njacks, | ||
| sizeof(*info), info); | ||
| if (rc) | ||
| goto on_exit; | ||
|
|
||
| for (i = 0; i < snd->njacks; ++i) { | ||
| struct virtio_jack *vjack = &snd->jacks[i]; | ||
|
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||
| vjack->nid = le32_to_cpu(info[i].hdr.hda_fn_nid); | ||
| vjack->features = le32_to_cpu(info[i].features); | ||
| vjack->defconf = le32_to_cpu(info[i].hda_reg_defconf); | ||
| vjack->caps = le32_to_cpu(info[i].hda_reg_caps); | ||
| vjack->connected = info[i].connected; | ||
| } | ||
|
|
||
| on_exit: | ||
| kfree(info); | ||
|
|
||
| return rc; | ||
| } | ||
|
|
||
| /** | ||
| * 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) | ||
| { | ||
| u32 i; | ||
| int rc; | ||
|
|
||
| for (i = 0; i < snd->njacks; ++i) { | ||
| struct virtio_jack *vjack = &snd->jacks[i]; | ||
|
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| vjack->type = virtsnd_jack_get_type(vjack); | ||
|
|
||
| rc = snd_jack_new(snd->card, virtsnd_jack_get_label(vjack), | ||
| vjack->type, &vjack->jack, true, true); | ||
| if (rc) | ||
| return rc; | ||
|
|
||
| if (vjack->jack) | ||
| vjack->jack->private_data = vjack; | ||
|
|
||
| snd_jack_report(vjack->jack, | ||
| vjack->connected ? vjack->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) | ||
| { | ||
| u32 jack_id = le32_to_cpu(event->data); | ||
| struct virtio_jack *vjack; | ||
|
|
||
| if (jack_id >= snd->njacks) | ||
| return; | ||
|
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| vjack = &snd->jacks[jack_id]; | ||
|
|
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| switch (le32_to_cpu(event->hdr.code)) { | ||
| case VIRTIO_SND_EVT_JACK_CONNECTED: | ||
| vjack->connected = true; | ||
| break; | ||
| case VIRTIO_SND_EVT_JACK_DISCONNECTED: | ||
| vjack->connected = false; | ||
| break; | ||
| default: | ||
| return; | ||
| } | ||
|
|
||
| snd_jack_report(vjack->jack, vjack->connected ? vjack->type : 0); | ||
| } |