[PATCH AUTOSEL 6.6 18/47] ASoC: SOF: sof-audio: Modify logic for enabling/disabling topology cores

Sasha Levin
2023-12-11T13:53:29Z

From: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>

[ Upstream commit 31ed8da1c8e5e504710bb36863700e3389f8fc81 ]

In the current code, we enable a widget core when it is set up and
disable it when it is freed. This is problematic with IPC4 because
widget free is essentially a NOP and all widgets are freed in the
firmware when the pipeline is deleted. This results in a crash during
pipeline deletion when one of it's widgets is scheduled to run on a
secondary core and is powered off when widget is freed. So, change the
logic to enable all cores needed by all the modules in a pipeline when
the pipeline widget is set up and disable them after the pipeline
widget is freed.

Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Link: https://lore.kernel.org/r/20231124135743.24674-3-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
sound/soc/sof/sof-audio.c | 65 ++++++++++++++++++++++++---------------
1 file changed, 41 insertions(+), 24 deletions(-)

diff --git a/sound/soc/sof/sof-audio.c b/sound/soc/sof/sof-audio.c
index 563fe6f7789f7..77cc64ac71131 100644
--- a/sound/soc/sof/sof-audio.c
+++ b/sound/soc/sof/sof-audio.c
@@ -46,6 +46,7 @@ static int sof_widget_free_unlocked(struct snd_sof_dev *sdev,
struct snd_sof_widget *swidget)
{
const struct sof_ipc_tplg_ops *tplg_ops = sof_ipc_get_ops(sdev, tplg);
+ struct snd_sof_pipeline *spipe = swidget->spipe;
struct snd_sof_widget *pipe_widget;
int err = 0;
int ret;
@@ -87,15 +88,22 @@ static int sof_widget_free_unlocked(struct snd_sof_dev *sdev,
}

/*
- * disable widget core. continue to route setup status and complete flag
- * even if this fails and return the appropriate error
+ * decrement ref count for cores associated with all modules in the pipeline and clear
+ * the complete flag
*/
- ret = snd_sof_dsp_core_put(sdev, swidget->core);
- if (ret < 0) {
- dev_err(sdev->dev, "error: failed to disable target core: %d for widget %s\n",
- swidget->core, swidget->widget->name);
- if (!err)
- err = ret;
+ if (swidget->id == snd_soc_dapm_scheduler) {
+ int i;
+
+ for_each_set_bit(i, &spipe->core_mask, sdev->num_cores) {
+ ret = snd_sof_dsp_core_put(sdev, i);
+ if (ret < 0) {
+ dev_err(sdev->dev, "failed to disable target core: %d for pipeline %s\n",
+ i, swidget->widget->name);
+ if (!err)
+ err = ret;
+ }
+ }
+ swidget->spipe->complete = 0;
}

/*
@@ -108,10 +116,6 @@ static int sof_widget_free_unlocked(struct snd_sof_dev *sdev,
err = ret;
}

- /* clear pipeline complete */
- if (swidget->id == snd_soc_dapm_scheduler)
- swidget->spipe->complete = 0;
-
if (!err)
dev_dbg(sdev->dev, "widget %s freed\n", swidget->widget->name);

@@ -134,8 +138,10 @@ static int sof_widget_setup_unlocked(struct snd_sof_dev *sdev,
struct snd_sof_widget *swidget)
{
const struct sof_ipc_tplg_ops *tplg_ops = sof_ipc_get_ops(sdev, tplg);
+ struct snd_sof_pipeline *spipe = swidget->spipe;
bool use_count_decremented = false;
int ret;
+ int i;

/* skip if there is no private data */
if (!swidget->private)
@@ -166,19 +172,23 @@ static int sof_widget_setup_unlocked(struct snd_sof_dev *sdev,
goto use_count_dec;
}

- /* enable widget core */
- ret = snd_sof_dsp_core_get(sdev, swidget->core);
- if (ret < 0) {
- dev_err(sdev->dev, "error: failed to enable target core for widget %s\n",
- swidget->widget->name);
- goto pipe_widget_free;
+ /* update ref count for cores associated with all modules in the pipeline */
+ if (swidget->id == snd_soc_dapm_scheduler) {
+ for_each_set_bit(i, &spipe->core_mask, sdev->num_cores) {
+ ret = snd_sof_dsp_core_get(sdev, i);
+ if (ret < 0) {
+ dev_err(sdev->dev, "failed to enable target core %d for pipeline %s\n",
+ i, swidget->widget->name);
+ goto pipe_widget_free;
+ }
+ }
}

/* setup widget in the DSP */
if (tplg_ops && tplg_ops->widget_setup) {
ret = tplg_ops->widget_setup(sdev, swidget);
if (ret < 0)
- goto core_put;
+ goto pipe_widget_free;
}

/* send config for DAI components */
@@ -208,15 +218,22 @@ static int sof_widget_setup_unlocked(struct snd_sof_dev *sdev,
return 0;

widget_free:
- /* widget use_count and core ref_count will both be decremented by sof_widget_free() */
+ /* widget use_count will be decremented by sof_widget_free() */
sof_widget_free_unlocked(sdev, swidget);
use_count_decremented = true;
-core_put:
- if (!use_count_decremented)
- snd_sof_dsp_core_put(sdev, swidget->core);
pipe_widget_free:
- if (swidget->id != snd_soc_dapm_scheduler)
+ if (swidget->id != snd_soc_dapm_scheduler) {
sof_widget_free_unlocked(sdev, swidget->spipe->pipe_widget);
+ } else {
+ int j;
+
+ /* decrement ref count for all cores that were updated previously */
+ for_each_set_bit(j, &spipe->core_mask, sdev->num_cores) {
+ if (j >= i)
+ break;
+ snd_sof_dsp_core_put(sdev, j);
+ }
+ }
use_count_dec:
if (!use_count_decremented)
swidget->use_count--;
--
2.42.0