ASoC: Intel: Skylake: Add support for LPMode

For D0i3, we need to tell DSP to run the pipelines in LP mode. This
information is kept in topology and passed to driver as an attribute
for pipe.

So add a new tuple for lpmode and program the pipe based on value set.

Signed-off-by: Jayachandran B <jayachandran.b@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/intel/skylake/skl-messages.c

@@ -1042,7 +1042,8 @@ int skl_create_pipeline(struct skl_sst *ctx, struct skl_pipe *pipe)
 	dev_dbg(ctx->dev, "%s: pipe_id = %d\n", __func__, pipe->ppl_id);
 
 	ret = skl_ipc_create_pipeline(&ctx->ipc, pipe->memory_pages,
-				pipe->pipe_priority, pipe->ppl_id);
+				pipe->pipe_priority, pipe->ppl_id,
+				pipe->lp_mode);
 	if (ret < 0) {
 		dev_err(ctx->dev, "Failed to create pipeline\n");
 		return ret;

sound/soc/intel/skylake/skl-sst-ipc.c

@@ -81,6 +81,11 @@
 #define IPC_INSTANCE_ID(x)		(((x) & IPC_INSTANCE_ID_MASK) \
 					<< IPC_INSTANCE_ID_SHIFT)
 
+#define IPC_PPL_LP_MODE_SHIFT           0
+#define IPC_PPL_LP_MODE_MASK            0x1
+#define IPC_PPL_LP_MODE(x)              (((x) & IPC_PPL_LP_MODE_MASK) \
+					<< IPC_PPL_LP_MODE_SHIFT)
+
 /* Set pipeline state message */
 #define IPC_PPL_STATE_SHIFT		0
 #define IPC_PPL_STATE_MASK		0x1F
@@ -559,7 +564,7 @@ void skl_ipc_free(struct sst_generic_ipc *ipc)
 }
 
 int skl_ipc_create_pipeline(struct sst_generic_ipc *ipc,
-		u16 ppl_mem_size, u8 ppl_type, u8 instance_id)
+		u16 ppl_mem_size, u8 ppl_type, u8 instance_id, u8 lp_mode)
 {
 	struct skl_ipc_header header = {0};
 	u64 *ipc_header = (u64 *)(&header);
@@ -572,6 +577,8 @@ int skl_ipc_create_pipeline(struct sst_generic_ipc *ipc,
 	header.primary |= IPC_PPL_TYPE(ppl_type);
 	header.primary |= IPC_PPL_MEM_SIZE(ppl_mem_size);
 
+	header.extension = IPC_PPL_LP_MODE(lp_mode);
+
 	dev_dbg(ipc->dev, "In %s header=%d\n", __func__, header.primary);
 	ret = sst_ipc_tx_message_wait(ipc, *ipc_header, NULL, 0, NULL, 0);
 	if (ret < 0) {

sound/soc/intel/skylake/skl-sst-ipc.h

@@ -148,7 +148,7 @@ struct skl_ipc_d0ix_msg {
 irqreturn_t skl_dsp_irq_thread_handler(int irq, void *context);
 
 int skl_ipc_create_pipeline(struct sst_generic_ipc *sst_ipc,
-		u16 ppl_mem_size, u8 ppl_type, u8 instance_id);
+		u16 ppl_mem_size, u8 ppl_type, u8 instance_id, u8 lp_mode);
 
 int skl_ipc_delete_pipeline(struct sst_generic_ipc *sst_ipc, u8 instance_id);
 

sound/soc/intel/skylake/skl-topology.c

@@ -1519,6 +1519,10 @@ static int skl_tplg_fill_pipe_tkn(struct device *dev,
 		pipe->memory_pages = tkn_val;
 		break;
 
+	case SKL_TKN_U32_PMODE:
+		pipe->lp_mode = tkn_val;
+		break;
+
 	default:
 		dev_err(dev, "Token not handled %d\n", tkn);
 		return -EINVAL;
@@ -1841,6 +1845,7 @@ static int skl_tplg_get_token(struct device *dev,
 	case SKL_TKN_U32_PIPE_CONN_TYPE:
 	case SKL_TKN_U32_PIPE_PRIORITY:
 	case SKL_TKN_U32_PIPE_MEM_PGS:
+	case SKL_TKN_U32_PMODE:
 		if (is_pipe_exists) {
 			ret = skl_tplg_fill_pipe_tkn(dev, mconfig->pipe,
 					tkn_elem->token, tkn_elem->value);

sound/soc/intel/skylake/skl-topology.h

@@ -279,6 +279,7 @@ struct skl_pipe {
 	u8 pipe_priority;
 	u16 conn_type;
 	u32 memory_pages;
+	u8 lp_mode;
 	struct skl_pipe_params *p_params;
 	enum skl_pipe_state state;
 	struct list_head w_list;