[PATCH 3/3] ASoC: SOF: topology: fix core enable sequence

[Kai Vehmanen]

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

Core power up involves 2 steps: The first step tries to
power up the core by setting the ADSPCS.SPA bit for the host-managed
cores. The second step involves sending the IPC to power up other
cores that are not host managed. The enabled_cores_mask should
be updated only when both these steps are successful. If the
IPC to the DSP fails, the host-managed core that was powered in
step 1 should be powered off before returning the error.

Signed-off-by: Ranjani Sridharan <ranjani.sridharan at linux.intel.com>
Reviewed-by: Rander Wang <rander.wang at linux.intel.com>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski at linux.intel.com>
Reviewed-by: Keyon Jie <yang.jie at linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart at linux.intel.com>
Signed-off-by: Kai Vehmanen <kai.vehmanen at linux.intel.com>
---
 sound/soc/sof/topology.c | 20 ++++++++++++++------
 1 file changed, 14 insertions(+), 6 deletions(-)

diff --git a/sound/soc/sof/topology.c b/sound/soc/sof/topology.c
index 46468fb7b6d1..d47da407a1bd 100644
--- a/sound/soc/sof/topology.c
+++ b/sound/soc/sof/topology.c
@@ -1303,7 +1303,7 @@ static int sof_core_enable(struct snd_sof_dev *sdev, int core)
 	if (sdev->enabled_cores_mask & BIT(core))
 		return 0;
 
-	/* power up the core */
+	/* power up the core if it is host managed */
 	ret = snd_sof_dsp_core_power_up(sdev, BIT(core));
 	if (ret < 0) {
 		dev_err(sdev->dev, "error: %d powering up core %d\n",
@@ -1311,16 +1311,24 @@ static int sof_core_enable(struct snd_sof_dev *sdev, int core)
 		return ret;
 	}
 
-	/* update enabled cores mask */
-	sdev->enabled_cores_mask |= BIT(core);
-
-	/* Now notify DSP that the core has been powered up */
+	/* Now notify DSP */
 	ret = sof_ipc_tx_message(sdev->ipc, pm_core_config.hdr.cmd,
 				 &pm_core_config, sizeof(pm_core_config),
 				 &pm_core_config, sizeof(pm_core_config));
-	if (ret < 0)
+	if (ret < 0) {
 		dev_err(sdev->dev, "error: core %d enable ipc failure %d\n",
 			core, ret);
+		goto err;
+	}
+
+	/* update enabled cores mask */
+	sdev->enabled_cores_mask |= BIT(core);
+
+	return ret;
+err:
+	/* power down core if it is host managed and return the original error if this fails too */
+	if (snd_sof_dsp_core_power_down(sdev, BIT(core)) < 0)
+		dev_err(sdev->dev, "error: powering down core %d\n", core);
 
 	return ret;
 }
-- 
2.27.0