[alsa-devel] [PATCH 6/7] ASoC: Intel: Skylake: Reset pipeline before its deletion

[cezary.rojewski at intel.com]

From: Amadeusz Sławiński <amadeuszx.slawinski at intel.com>

Before actual deletion, pipeline should enter RESET state. Currently,
pipe skips this checkpoint and goes straight to the finish line.
This is not the expected path by the FW, so correct it.

Signed-off-by: Amadeusz Sławiński <amadeuszx.slawinski at intel.com>
Signed-off-by: Cezary Rojewski <cezary.rojewski at intel.com>
---
 sound/soc/intel/skylake/skl-messages.c | 23 ++++++++++++++++-------
 1 file changed, 16 insertions(+), 7 deletions(-)

diff --git a/sound/soc/intel/skylake/skl-messages.c b/sound/soc/intel/skylake/skl-messages.c
index df01dc952521..79baf90e6116 100644
--- a/sound/soc/intel/skylake/skl-messages.c
+++ b/sound/soc/intel/skylake/skl-messages.c
@@ -1265,10 +1265,10 @@ int skl_create_pipeline(struct skl_sst *ctx, struct skl_pipe *pipe)
 }
 
 /*
- * A pipeline needs to be deleted on cleanup. If a pipeline is running, then
- * pause the pipeline first and then delete it
- * The pipe delete is done by sending delete pipeline IPC. DSP will stop the
- * DMA engines and releases resources
+ * A pipeline needs to be deleted on cleanup. If a pipeline is running,
+ * then pause it first. Before actual deletion, pipeline should enter
+ * reset state. Finish the procedure by sending delete pipeline IPC.
+ * DSP will stop the DMA engines and release resources
  */
 int skl_delete_pipe(struct skl_sst *ctx, struct skl_pipe *pipe)
 {
@@ -1276,6 +1276,10 @@ int skl_delete_pipe(struct skl_sst *ctx, struct skl_pipe *pipe)
 
 	dev_dbg(ctx->dev, "%s: pipe = %d\n", __func__, pipe->ppl_id);
 
+	/* If pipe was not created in FW, do not try to delete it */
+	if (pipe->state < SKL_PIPE_CREATED)
+		return 0;
+
 	/* If pipe is started, do stop the pipe in FW. */
 	if (pipe->state >= SKL_PIPE_STARTED) {
 		ret = skl_set_pipe_state(ctx, pipe, PPL_PAUSED);
@@ -1287,9 +1291,14 @@ int skl_delete_pipe(struct skl_sst *ctx, struct skl_pipe *pipe)
 		pipe->state = SKL_PIPE_PAUSED;
 	}
 
-	/* If pipe was not created in FW, do not try to delete it */
-	if (pipe->state < SKL_PIPE_CREATED)
-		return 0;
+	/* reset pipe state before deletion */
+	ret = skl_set_pipe_state(ctx, pipe, PPL_RESET);
+	if (ret < 0) {
+		dev_err(ctx->dev, "Failed to reset pipe ret=%d\n", ret);
+		return ret;
+	}
+
+	pipe->state = SKL_PIPE_RESET;
 
 	ret = skl_ipc_delete_pipeline(&ctx->ipc, pipe->ppl_id);
 	if (ret < 0) {
-- 
2.17.1