Merge series "Add support for on demand pipeline setup/destroy" from Peter Ujfalusi <peter.ujfalusi@linux.intel.com>:

Hi,

The previous, v2 of this series was sent by Daniel Baluta:
https://lore.kernel.org/alsa-devel/20210917143659.401102-1-daniel.baluta@oss.nxp.com/

We have agreed that it might be better that someone from Intel is going to take it
from here as we already have the infrastructure up to test and verify the
dynamic pipelines support.

Changes since v2 (sent by Daniel Baluta):
- patch 10: Fix NULL point dereference in hda_dai_update_config()
- I have kept Daniel's SoB for the series.

Changes since v1:
- Signed-off-by tag added by Daniel

This series implements initial support for dynamic pipelines to setup/teardown
pipeline as needed when a PCM is open/closed.

Initially dynamic pipelines are only supported with single core setup which will
be expanded with a follow-up series.

Review with SOF community at
https://github.com/thesofproject/linux/pull/2794

The feature has been merged on 1st of April to sof-dev, all issues found since
has been fixed and squashed to this upstream series.

Regards,
Peter
---
Ranjani Sridharan (12):
  ASoC: topology: change the complete op in snd_soc_tplg_ops to return
    int
  ASoC: SOF: control: Add access field in struct snd_sof_control
  ASoC: SOF: topology: Add new token for dynamic pipeline
  ASoC: SOF: sof-audio: add helpers for widgets, kcontrols and dai
    config set up
  AsoC: dapm: export a couple of functions
  ASoC: SOF: Add new fields to snd_sof_route
  ASoC: SOF: restore kcontrols for widget during set up
  ASoC: SOF: Don't set up widgets during topology parsing
  ASoC: SOF: Introduce widget use_count
  ASoC: SOF: Intel: hda: make sure DAI widget is set up before IPC
  ASoC: SOF: Add support for dynamic pipelines
  ASoC: SOF: topology: Add kernel parameter for topology verification

 include/sound/soc-dpcm.h               |   1 +
 include/sound/soc-topology.h           |   2 +-
 include/uapi/sound/sof/tokens.h        |   1 +
 sound/soc/intel/skylake/skl-topology.c |   6 +-
 sound/soc/soc-dapm.c                   |   2 +
 sound/soc/soc-pcm.c                    |   4 +-
 sound/soc/soc-topology.c               |  10 +-
 sound/soc/sof/intel/hda-dai.c          | 174 +++---
 sound/soc/sof/intel/hda.c              | 177 ++++--
 sound/soc/sof/intel/hda.h              |   5 +
 sound/soc/sof/ipc.c                    |  22 +
 sound/soc/sof/pcm.c                    |  58 +-
 sound/soc/sof/pm.c                     |   4 +-
 sound/soc/sof/sof-audio.c              | 709 +++++++++++++++++++------
 sound/soc/sof/sof-audio.h              |  32 +-
 sound/soc/sof/sof-priv.h               |   1 +
 sound/soc/sof/topology.c               | 362 +++++--------
 17 files changed, 1032 insertions(+), 538 deletions(-)

--
2.33.0

1 files changed, 22 insertions, 0 deletions

diff --git a/sound/soc/sof/ipc.c b/sound/soc/sof/ipc.c
index 0034e7a34a1d..53593df95155 100644
--- a/sound/soc/sof/ipc.c
+++ b/sound/soc/sof/ipc.c
@@ -744,9 +744,31 @@ int snd_sof_ipc_set_get_comp_data(struct snd_sof_control *scontrol,
 	struct sof_ipc_fw_ready *ready = &sdev->fw_ready;
 	struct sof_ipc_fw_version *v = &ready->version;
 	struct sof_ipc_ctrl_data_params sparams;
+	struct snd_sof_widget *swidget;
+	bool widget_found = false;
 	size_t send_bytes;
 	int err;
 
+	list_for_each_entry(swidget, &sdev->widget_list, list) {
+		if (swidget->comp_id == scontrol->comp_id) {
+			widget_found = true;
+			break;
+		}
+	}
+
+	if (!widget_found) {
+		dev_err(sdev->dev, "error: can't find widget with id %d\n", scontrol->comp_id);
+		return -EINVAL;
+	}
+
+	/*
+	 * Volatile controls should always be part of static pipelines and the widget use_count
+	 * would always be > 0 in this case. For the others, just return the cached value if the
+	 * widget is not set up.
+	 */
+	if (!swidget->use_count)
+		return 0;
+
 	/* read or write firmware volume */
 	if (scontrol->readback_offset != 0) {
 		/* write/read value header via mmaped region */