[alsa-devel] [PATCH v2 1/9] ASoC: Intel: Add sst_ipc_tx_message_nopm

[Vinod Koul]

If the DSP is in low power mode, it needs to be woken up by a "wake" IPC
to set it into the D0 state before we can send any other IPC command.

The call flow is that the driver calls sst_ipc_tx_message_wait() to send any
IPC and this call checks if the device is in low power mode and in that
case we need to send the wake IPC.

So add a new IPC nopm variant which can be called from driver and
doesn't check for power state (as we already know that) and avoids
circular dependency of again checking power state.

Signed-off-by: Jayachandran B <jayachandran.b at intel.com>
Signed-off-by: Vinod Koul <vinod.koul at intel.com>
---
 sound/soc/intel/common/sst-ipc.c | 8 ++++++++
 sound/soc/intel/common/sst-ipc.h | 3 +++
 2 files changed, 11 insertions(+)

diff --git a/sound/soc/intel/common/sst-ipc.c b/sound/soc/intel/common/sst-ipc.c
index 45a85190a081..2c1b3159ac1a 100644
--- a/sound/soc/intel/common/sst-ipc.c
+++ b/sound/soc/intel/common/sst-ipc.c
@@ -220,6 +220,14 @@ int sst_ipc_tx_message_nowait(struct sst_generic_ipc *ipc, u64 header,
 }
 EXPORT_SYMBOL_GPL(sst_ipc_tx_message_nowait);
 
+int sst_ipc_tx_message_nopm(struct sst_generic_ipc *ipc, u64 header,
+	void *tx_data, size_t tx_bytes, void *rx_data, size_t rx_bytes)
+{
+	return ipc_tx_message(ipc, header, tx_data, tx_bytes,
+		rx_data, rx_bytes, 1);
+}
+EXPORT_SYMBOL_GPL(sst_ipc_tx_message_nopm);
+
 struct ipc_message *sst_ipc_reply_find_msg(struct sst_generic_ipc *ipc,
 	u64 header)
 {
diff --git a/sound/soc/intel/common/sst-ipc.h b/sound/soc/intel/common/sst-ipc.h
index 46871a5dff1d..f4aab1b3789a 100644
--- a/sound/soc/intel/common/sst-ipc.h
+++ b/sound/soc/intel/common/sst-ipc.h
@@ -82,6 +82,9 @@ int sst_ipc_tx_message_wait(struct sst_generic_ipc *ipc, u64 header,
 int sst_ipc_tx_message_nowait(struct sst_generic_ipc *ipc, u64 header,
 	void *tx_data, size_t tx_bytes);
 
+int sst_ipc_tx_message_nopm(struct sst_generic_ipc *ipc, u64 header,
+	void *tx_data, size_t tx_bytes, void *rx_data, size_t rx_bytes);
+
 struct ipc_message *sst_ipc_reply_find_msg(struct sst_generic_ipc *ipc,
 	u64 header);
 
-- 
1.9.1