ASoC: SOF: Introduce IPC3 PCM hw_free op

Add the IPC3 PCM ops, define the hw_free op and modify all users to use
the op.

Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20220317175044.1752400-14-ranjani.sridharan@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 43 insertions, 0 deletions

diff --git a/sound/soc/sof/ipc3-pcm.c b/sound/soc/sof/ipc3-pcm.c
new file mode 100644
index 000000000000..96f498b4b2d6
--- /dev/null
+++ b/sound/soc/sof/ipc3-pcm.c
@@ -0,0 +1,43 @@
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
+//
+// This file is provided under a dual BSD/GPLv2 license.  When using or
+// redistributing this file, you may do so under either license.
+//
+// Copyright(c) 2021 Intel Corporation. All rights reserved.
+//
+//
+
+#include <sound/pcm_params.h>
+#include "ipc3-ops.h"
+#include "ops.h"
+#include "sof-priv.h"
+#include "sof-audio.h"
+
+static int sof_ipc3_pcm_hw_free(struct snd_soc_component *component,
+				struct snd_pcm_substream *substream)
+{
+	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
+	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+	struct sof_ipc_stream stream;
+	struct sof_ipc_reply reply;
+	struct snd_sof_pcm *spcm;
+
+	spcm = snd_sof_find_spcm_dai(component, rtd);
+	if (!spcm)
+		return -EINVAL;
+
+	if (!spcm->prepared[substream->stream])
+		return 0;
+
+	stream.hdr.size = sizeof(stream);
+	stream.hdr.cmd = SOF_IPC_GLB_STREAM_MSG | SOF_IPC_STREAM_PCM_FREE;
+	stream.comp_id = spcm->stream[substream->stream].comp_id;
+
+	/* send IPC to the DSP */
+	return sof_ipc_tx_message(sdev->ipc, stream.hdr.cmd, &stream,
+				  sizeof(stream), &reply, sizeof(reply));
+}
+
+const struct sof_ipc_pcm_ops ipc3_pcm_ops = {
+	.hw_free = sof_ipc3_pcm_hw_free,
+};