X-Git-Url: https://gerrit.automotivelinux.org/gerrit/gitweb?a=blobdiff_plain;f=meta-agl-bsp%2Fvirtualization-layer%2Frecipes-kernel%2Flinux%2Flinux-yocto%2Fvirtio-kmeta%2Fbsp%2Fvirtio%2Fvirtio-snd%2F0009-ALSA-virtio-introduce-device-suspend-resume-support.patch;fp=meta-agl-bsp%2Fvirtualization-layer%2Frecipes-kernel%2Flinux%2Flinux-yocto%2Fvirtio-kmeta%2Fbsp%2Fvirtio%2Fvirtio-snd%2F0009-ALSA-virtio-introduce-device-suspend-resume-support.patch;h=b7d278fd0be9bf1c9c5a912dec6dc029b9d3d641;hb=191ce24bf7878fff02ecad9d949dd2e42f5dfc0b;hp=0000000000000000000000000000000000000000;hpb=80b175fa5dc5afbb62883e1d6152b55c0a786c2d;p=AGL%2Fmeta-agl.git diff --git a/meta-agl-bsp/virtualization-layer/recipes-kernel/linux/linux-yocto/virtio-kmeta/bsp/virtio/virtio-snd/0009-ALSA-virtio-introduce-device-suspend-resume-support.patch b/meta-agl-bsp/virtualization-layer/recipes-kernel/linux/linux-yocto/virtio-kmeta/bsp/virtio/virtio-snd/0009-ALSA-virtio-introduce-device-suspend-resume-support.patch new file mode 100644 index 000000000..b7d278fd0 --- /dev/null +++ b/meta-agl-bsp/virtualization-layer/recipes-kernel/linux/linux-yocto/virtio-kmeta/bsp/virtio/virtio-snd/0009-ALSA-virtio-introduce-device-suspend-resume-support.patch @@ -0,0 +1,174 @@ +From b173fb2a0eb0067fc665ba48f9b2b8b5f991c078 Mon Sep 17 00:00:00 2001 +From: Anton Yakovlev +Date: Tue, 2 Mar 2021 17:47:09 +0100 +Subject: [PATCH] ALSA: virtio: introduce device suspend/resume support + +All running PCM substreams are stopped on device suspend and restarted +on device resume. + +Signed-off-by: Anton Yakovlev +Link: https://lore.kernel.org/r/20210302164709.3142702-10-anton.yakovlev@opensynergy.com +Signed-off-by: Takashi Iwai +Signed-off-by: Vasyl Vavrychuk +--- + sound/virtio/virtio_card.c | 56 +++++++++++++++++++++++++++++++++++ + sound/virtio/virtio_pcm.h | 3 ++ + sound/virtio/virtio_pcm_ops.c | 33 ++++++++++++++++----- + 3 files changed, 85 insertions(+), 7 deletions(-) + +diff --git a/sound/virtio/virtio_card.c b/sound/virtio/virtio_card.c +index 1c03fcc41c3b..ae9128063917 100644 +--- a/sound/virtio/virtio_card.c ++++ b/sound/virtio/virtio_card.c +@@ -362,6 +362,58 @@ static void virtsnd_remove(struct virtio_device *vdev) + kfree(snd->event_msgs); + } + ++#ifdef CONFIG_PM_SLEEP ++/** ++ * virtsnd_freeze() - Suspend device. ++ * @vdev: VirtIO parent device. ++ * ++ * Context: Any context. ++ * Return: 0 on success, -errno on failure. ++ */ ++static int virtsnd_freeze(struct virtio_device *vdev) ++{ ++ struct virtio_snd *snd = vdev->priv; ++ unsigned int i; ++ ++ virtsnd_disable_event_vq(snd); ++ virtsnd_ctl_msg_cancel_all(snd); ++ ++ vdev->config->del_vqs(vdev); ++ vdev->config->reset(vdev); ++ ++ for (i = 0; i < snd->nsubstreams; ++i) ++ cancel_work_sync(&snd->substreams[i].elapsed_period); ++ ++ kfree(snd->event_msgs); ++ snd->event_msgs = NULL; ++ ++ return 0; ++} ++ ++/** ++ * virtsnd_restore() - Resume device. ++ * @vdev: VirtIO parent device. ++ * ++ * Context: Any context. ++ * Return: 0 on success, -errno on failure. ++ */ ++static int virtsnd_restore(struct virtio_device *vdev) ++{ ++ struct virtio_snd *snd = vdev->priv; ++ int rc; ++ ++ rc = virtsnd_find_vqs(snd); ++ if (rc) ++ return rc; ++ ++ virtio_device_ready(vdev); ++ ++ virtsnd_enable_event_vq(snd); ++ ++ return 0; ++} ++#endif /* CONFIG_PM_SLEEP */ ++ + static const struct virtio_device_id id_table[] = { + { VIRTIO_ID_SOUND, VIRTIO_DEV_ANY_ID }, + { 0 }, +@@ -374,6 +426,10 @@ static struct virtio_driver virtsnd_driver = { + .validate = virtsnd_validate, + .probe = virtsnd_probe, + .remove = virtsnd_remove, ++#ifdef CONFIG_PM_SLEEP ++ .freeze = virtsnd_freeze, ++ .restore = virtsnd_restore, ++#endif + }; + + static int __init init(void) +diff --git a/sound/virtio/virtio_pcm.h b/sound/virtio/virtio_pcm.h +index 1353fdc9bd69..062eb8e8f2cf 100644 +--- a/sound/virtio/virtio_pcm.h ++++ b/sound/virtio/virtio_pcm.h +@@ -31,6 +31,8 @@ struct virtio_pcm_msg; + * @xfer_xrun: Data underflow/overflow state (0 - no xrun, 1 - xrun). + * @stopped: True if the substream is stopped and must be released on the device + * side. ++ * @suspended: True if the substream is suspended and must be reconfigured on ++ * the device side at resume. + * @msgs: Allocated I/O messages. + * @nmsgs: Number of allocated I/O messages. + * @msg_last_enqueued: Index of the last I/O message added to the virtqueue. +@@ -52,6 +54,7 @@ struct virtio_pcm_substream { + bool xfer_enabled; + bool xfer_xrun; + bool stopped; ++ bool suspended; + struct virtio_pcm_msg **msgs; + unsigned int nmsgs; + int msg_last_enqueued; +diff --git a/sound/virtio/virtio_pcm_ops.c b/sound/virtio/virtio_pcm_ops.c +index 0682a2df6c8c..f8bfb87624be 100644 +--- a/sound/virtio/virtio_pcm_ops.c ++++ b/sound/virtio/virtio_pcm_ops.c +@@ -115,6 +115,7 @@ static int virtsnd_pcm_open(struct snd_pcm_substream *substream) + SNDRV_PCM_HW_PARAM_PERIODS); + + vss->stopped = !!virtsnd_pcm_msg_pending_num(vss); ++ vss->suspended = false; + + /* + * If the substream has already been used, then the I/O queue may be in +@@ -272,16 +273,31 @@ static int virtsnd_pcm_prepare(struct snd_pcm_substream *substream) + struct virtio_device *vdev = vss->snd->vdev; + struct virtio_snd_msg *msg; + +- if (virtsnd_pcm_msg_pending_num(vss)) { +- dev_err(&vdev->dev, "SID %u: invalid I/O queue state\n", +- vss->sid); +- return -EBADFD; ++ if (!vss->suspended) { ++ if (virtsnd_pcm_msg_pending_num(vss)) { ++ dev_err(&vdev->dev, "SID %u: invalid I/O queue state\n", ++ vss->sid); ++ return -EBADFD; ++ } ++ ++ vss->buffer_bytes = snd_pcm_lib_buffer_bytes(substream); ++ vss->hw_ptr = 0; ++ vss->msg_last_enqueued = -1; ++ } else { ++ struct snd_pcm_runtime *runtime = substream->runtime; ++ unsigned int buffer_bytes = snd_pcm_lib_buffer_bytes(substream); ++ unsigned int period_bytes = snd_pcm_lib_period_bytes(substream); ++ int rc; ++ ++ rc = virtsnd_pcm_dev_set_params(vss, buffer_bytes, period_bytes, ++ runtime->channels, ++ runtime->format, runtime->rate); ++ if (rc) ++ return rc; + } + +- vss->buffer_bytes = snd_pcm_lib_buffer_bytes(substream); +- vss->hw_ptr = 0; + vss->xfer_xrun = false; +- vss->msg_last_enqueued = -1; ++ vss->suspended = false; + vss->msg_count = 0; + + msg = virtsnd_pcm_ctl_msg_alloc(vss, VIRTIO_SND_R_PCM_PREPARE, +@@ -336,6 +352,9 @@ static int virtsnd_pcm_trigger(struct snd_pcm_substream *substream, int command) + } + + return virtsnd_ctl_msg_send_sync(snd, msg); ++ case SNDRV_PCM_TRIGGER_SUSPEND: ++ vss->suspended = true; ++ fallthrough; + case SNDRV_PCM_TRIGGER_STOP: + vss->stopped = true; + fallthrough;