[RFC 12/37] ASoC: Intel: avs: Add power management requests

[Cezary Rojewski]

Audio DSP supports low power states i.e.: transitions between D0 and D3
and D0-substates in form of D0i3. That process is a combination of core
and IPC operations. Here, Dx and D0ix IPC handlers are added.

Signed-off-by: Amadeusz Sławiński <amadeuszx.slawinski at linux.intel.com>
Signed-off-by: Cezary Rojewski <cezary.rojewski at intel.com>
---
 sound/soc/intel/avs/messages.c | 43 ++++++++++++++++++++++++++++++++++
 sound/soc/intel/avs/messages.h | 16 +++++++++++++
 2 files changed, 59 insertions(+)

diff --git a/sound/soc/intel/avs/messages.c b/sound/soc/intel/avs/messages.c
index e870d5792a77..1b589689410f 100644
--- a/sound/soc/intel/avs/messages.c
+++ b/sound/soc/intel/avs/messages.c
@@ -347,3 +347,46 @@ int avs_ipc_get_large_config(struct avs_dev *adev, u16 module_id, u8 instance_id
 
 	return 0;
 }
+
+int avs_ipc_set_dx(struct avs_dev *adev, u32 core_mask, bool powerup)
+{
+	union avs_module_msg msg = AVS_MODULE_REQUEST(SET_DX);
+	struct avs_ipc_msg request;
+	struct avs_dxstate_info dx;
+	int ret;
+
+	dx.core_mask = core_mask;
+	dx.dx_mask = powerup ? core_mask : 0;
+	request.header = msg.val;
+	request.data = &dx;
+	request.size = sizeof(dx);
+
+	/*
+	 * SET_D0 is sent for non-main cores only while SET_D3 is used to
+	 * suspend for all of them. Both cases prevent any D0I3 transitions.
+	 */
+	ret = avs_dsp_send_pm_msg(adev, &request, NULL, true);
+	if (ret)
+		avs_ipc_err(adev, &request, "set dx", ret);
+
+	return ret;
+}
+
+int avs_ipc_set_d0ix(struct avs_dev *adev, bool enable_pg, bool streaming)
+{
+	union avs_module_msg msg = AVS_MODULE_REQUEST(SET_D0IX);
+	struct avs_ipc_msg request = {0};
+	int ret;
+
+	/* Wake & streaming for < cAVS 2.0 */
+	msg.ext.set_d0ix.wake = enable_pg;
+	msg.ext.set_d0ix.streaming = streaming;
+
+	request.header = msg.val;
+
+	ret = avs_dsp_send_pm_msg(adev, &request, NULL, false);
+	if (ret)
+		avs_ipc_err(adev, &request, "set d0ix", ret);
+
+	return ret;
+}
diff --git a/sound/soc/intel/avs/messages.h b/sound/soc/intel/avs/messages.h
index 1dabd1005327..bbdba4631b1f 100644
--- a/sound/soc/intel/avs/messages.h
+++ b/sound/soc/intel/avs/messages.h
@@ -101,6 +101,8 @@ enum avs_module_msg_type {
 	AVS_MOD_LARGE_CONFIG_SET = 4,
 	AVS_MOD_BIND = 5,
 	AVS_MOD_UNBIND = 6,
+	AVS_MOD_SET_DX = 7,
+	AVS_MOD_SET_D0IX = 8,
 	AVS_MOD_DELETE_INSTANCE = 11,
 };
 
@@ -137,6 +139,11 @@ union avs_module_msg {
 				u32 dst_queue:3;
 				u32 src_queue:3;
 			} bind_unbind;
+			struct {
+				/* cAVS < 2.0 */
+				u32 wake:1;
+				u32 streaming:1;
+			} set_d0ix;
 		} ext;
 	};
 } __packed;
@@ -298,4 +305,13 @@ int avs_ipc_get_large_config(struct avs_dev *adev, u16 module_id, u8 instance_id
 			     u8 param_id, u8 *request_data, size_t request_size,
 			     u8 **reply_data, size_t *reply_size);
 
+/* DSP cores and domains power management messages */
+struct avs_dxstate_info {
+	u32 core_mask;
+	u32 dx_mask;
+} __packed;
+
+int avs_ipc_set_dx(struct avs_dev *adev, u32 core_mask, bool powerup);
+int avs_ipc_set_d0ix(struct avs_dev *adev, bool enable_pg, bool streaming);
+
 #endif /* __SOUND_SOC_INTEL_AVS_MSGS_H */
-- 
2.25.1