[PATCH 3/4] ASoC: SOF: Intel: hda-loader: clear the IPC ack bit after FW_PURGE done

[Pierre-Louis Bossart]

From: Keyon Jie <yang.jie at linux.intel.com>

Set DONE bit after the FW_PURGE IPC is polled successfully, to clear the
interrupt and avoid the arrival of the confusing unexpected ipc.

Signed-off-by: Keyon Jie <yang.jie at linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart at linux.intel.com>
---
 sound/soc/sof/intel/hda-loader.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/sound/soc/sof/intel/hda-loader.c b/sound/soc/sof/intel/hda-loader.c
index 8852184a2569..03b05d7f66da 100644
--- a/sound/soc/sof/intel/hda-loader.c
+++ b/sound/soc/sof/intel/hda-loader.c
@@ -131,6 +131,12 @@ static int cl_dsp_init(struct snd_sof_dev *sdev, const void *fwdata,
 		goto err;
 	}
 
+	/* set DONE bit to clear the reply IPC message */
+	snd_sof_dsp_update_bits_forced(sdev, HDA_DSP_BAR,
+				       chip->ipc_ack,
+				       chip->ipc_ack_mask,
+				       chip->ipc_ack_mask);
+
 	/* step 5: power down corex */
 	ret = hda_dsp_core_power_down(sdev,
 				  chip->cores_mask & ~(HDA_DSP_CORE_MASK(0)));
-- 
2.20.1