From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 05D31C433E0 for ; Sat, 27 Feb 2021 09:09:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C6EEC64E86 for ; Sat, 27 Feb 2021 09:09:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230305AbhB0JJU (ORCPT ); Sat, 27 Feb 2021 04:09:20 -0500 Received: from mx1.opensynergy.com ([217.66.60.4]:30473 "EHLO mx1.opensynergy.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230155AbhB0JBy (ORCPT ); Sat, 27 Feb 2021 04:01:54 -0500 Received: from SR-MAILGATE-02.opensynergy.com (localhost.localdomain [127.0.0.1]) by mx1.opensynergy.com (Proxmox) with ESMTP id 547D9A1765; Sat, 27 Feb 2021 10:00:44 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=opensynergy.com; h=cc:cc:content-transfer-encoding:content-type:content-type :date:from:from:in-reply-to:message-id:mime-version:references :reply-to:subject:subject:to:to; s=srmailgate02; bh=zLcadKSiDEB2 5euoNy23WAsizIICsggTnRBQxLzaEyk=; b=Xlopr/eWd8YAOS0Eq0Z5K60FlzOz bU5/TBb1pB5ZKQL4nQdWmOfb4CP8BVBaKMiRUTizHmrAdIZ/j41753zNj8Ya8IFN +aNd+oaKAF1PoeDzX3i1Ybxhqrxcqnx+4ig6A65sDmwh819Yui1/WE9CNDLlv+oI cUYRdXgwk9edgYAj6XgRyHQ43LYBBSDVh1yzPewBV+Ck0ImSleEZM11HYhOajP25 EST9S6ndRwNVuws6+ZYtl4+oyZv/5ydv/L0Dzhic+/oeQ2vah+3kGSG5LISIUC98 XOMN/S9asSSsEUf+plIANnLVAOny61yBt0NwquFfJ5AERcOVGZh13JH1xQ== From: Anton Yakovlev To: , , CC: "Michael S. Tsirkin" , Jaroslav Kysela , Takashi Iwai , Subject: [PATCH v6 9/9] ALSA: virtio: introduce device suspend/resume support Date: Sat, 27 Feb 2021 09:59:56 +0100 Message-ID: <20210227085956.1700687-10-anton.yakovlev@opensynergy.com> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20210227085956.1700687-1-anton.yakovlev@opensynergy.com> References: <20210227085956.1700687-1-anton.yakovlev@opensynergy.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: SR-MAIL-01.open-synergy.com (10.26.10.21) To SR-MAIL-01.open-synergy.com (10.26.10.21) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org All running PCM substreams are stopped on device suspend and restarted on device resume. Signed-off-by: Anton Yakovlev --- sound/virtio/virtio_card.c | 56 +++++++++++++++++++++++++++++++++++ sound/virtio/virtio_pcm.c | 1 + sound/virtio/virtio_pcm_ops.c | 41 ++++++++++++++++++++----- 3 files changed, 90 insertions(+), 8 deletions(-) diff --git a/sound/virtio/virtio_card.c b/sound/virtio/virtio_card.c index 59455a562018..c7ae8801991d 100644 --- a/sound/virtio/virtio_card.c +++ b/sound/virtio/virtio_card.c @@ -323,6 +323,58 @@ 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; + + virtsnd_ctl_msg_cancel_all(snd); + + vdev->config->del_vqs(vdev); + vdev->config->reset(vdev); + + kfree(snd->event_msgs); + + /* + * If the virtsnd_restore() fails before re-allocating events, then we + * get a dangling pointer here. + */ + 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 }, @@ -335,6 +387,10 @@ 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.c b/sound/virtio/virtio_pcm.c index 3605151860f2..4a4a6583b002 100644 --- a/sound/virtio/virtio_pcm.c +++ b/sound/virtio/virtio_pcm.c @@ -109,6 +109,7 @@ static int virtsnd_pcm_build_hw(struct virtio_pcm_substream *vss, SNDRV_PCM_INFO_BATCH | SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_INTERLEAVED | + SNDRV_PCM_INFO_RESUME | SNDRV_PCM_INFO_PAUSE; if (!info->channels_min || info->channels_min > info->channels_max) { diff --git a/sound/virtio/virtio_pcm_ops.c b/sound/virtio/virtio_pcm_ops.c index d02d79bd94f3..03a7e2666cfb 100644 --- a/sound/virtio/virtio_pcm_ops.c +++ b/sound/virtio/virtio_pcm_ops.c @@ -167,7 +167,8 @@ static int virtsnd_pcm_hw_params(struct snd_pcm_substream *substream, int vrate = -1; int rc; - if (virtsnd_pcm_msg_pending_num(vss)) { + if (runtime->status->state != SNDRV_PCM_STATE_SUSPENDED && + virtsnd_pcm_msg_pending_num(vss)) { dev_err(&vdev->dev, "SID %u: invalid I/O queue state\n", vss->sid); return -EBADFD; @@ -231,6 +232,10 @@ static int virtsnd_pcm_hw_params(struct snd_pcm_substream *substream, if (rc) return rc; + /* If messages have already been allocated before, do nothing. */ + if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) + return 0; + /* Free previously allocated messages (if any). */ virtsnd_pcm_msg_free(vss); @@ -267,20 +272,24 @@ static int virtsnd_pcm_hw_free(struct snd_pcm_substream *substream) */ static int virtsnd_pcm_prepare(struct snd_pcm_substream *substream) { + struct snd_pcm_runtime *runtime = substream->runtime; struct virtio_pcm_substream *vss = snd_pcm_substream_chip(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 (runtime->status->state != SNDRV_PCM_STATE_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; } - vss->buffer_bytes = snd_pcm_lib_buffer_bytes(substream); - vss->hw_ptr = 0; vss->xfer_xrun = false; - vss->msg_last_enqueued = -1; vss->msg_count = 0; msg = virtsnd_pcm_ctl_msg_alloc(vss, VIRTIO_SND_R_PCM_PREPARE, @@ -309,6 +318,21 @@ static int virtsnd_pcm_trigger(struct snd_pcm_substream *substream, int command) int rc; switch (command) { + case SNDRV_PCM_TRIGGER_RESUME: { + /* + * We restart the substream by executing the standard command + * sequence. + */ + rc = virtsnd_pcm_hw_params(substream, NULL); + if (rc) + return rc; + + rc = virtsnd_pcm_prepare(substream); + if (rc) + return rc; + + fallthrough; + } case SNDRV_PCM_TRIGGER_START: case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: { struct virtio_snd_queue *queue = virtsnd_pcm_queue(vss); @@ -335,6 +359,7 @@ 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: case SNDRV_PCM_TRIGGER_STOP: case SNDRV_PCM_TRIGGER_PAUSE_PUSH: { spin_lock_irqsave(&vss->lock, flags); -- 2.30.1