[PATCH v3 07/10] dmaengine: dw-edma: Add non_ll_start() callback

[Frank.Li@oss.nxp.com]

From: Frank Li <Frank.Li@nxp.com>

Add a non_ll_start() callback and move the common non-linked-list channel
handling into the EDMA core so it can be shared by both the EDMA and HDMA.
Prepare for the upcoming reorganization of the burst and chunk structures.

Signed-off-by: Frank Li <Frank.Li@nxp.com>
---
 drivers/dma/dw-edma/dw-edma-core.h    | 12 +++++++++++-
 drivers/dma/dw-edma/dw-hdma-v0-core.c | 23 ++++-------------------
 2 files changed, 15 insertions(+), 20 deletions(-)

diff --git a/drivers/dma/dw-edma/dw-edma-core.h b/drivers/dma/dw-edma/dw-edma-core.h
index bab4d49c92feb..e18d6e827c2c9 100644
--- a/drivers/dma/dw-edma/dw-edma-core.h
+++ b/drivers/dma/dw-edma/dw-edma-core.h
@@ -126,6 +126,7 @@ struct dw_edma_core_ops {
 	irqreturn_t (*handle_int)(struct dw_edma_irq *dw_irq, enum dw_edma_dir dir,
 				  dw_edma_handler_t done, dw_edma_handler_t abort);
 	void (*start)(struct dw_edma_chunk *chunk, bool first);
+	void (*non_ll_start)(struct dw_edma_chan *chan, struct dw_edma_burst *child);
 	void (*ll_data)(struct dw_edma_chan *chan, struct dw_edma_burst *burst,
 			u32 idx, bool cb, bool irq);
 	void (*ll_link)(struct dw_edma_chan *chan, u32 idx, bool cb, u64 addr);
@@ -201,7 +202,16 @@ dw_edma_core_handle_int(struct dw_edma_irq *dw_irq, enum dw_edma_dir dir,
 static inline
 void dw_edma_core_start(struct dw_edma *dw, struct dw_edma_chunk *chunk, bool first)
 {
-	dw->core->start(chunk, first);
+	if (chunk->chan->non_ll) {
+		struct dw_edma_burst *child;
+
+		child = list_first_entry_or_null(&chunk->burst->list,
+						 struct dw_edma_burst, list);
+		if (child)
+			dw->core->non_ll_start(chunk->chan, child);
+	} else {
+		dw->core->start(chunk, first);
+	}
 }
 
 static inline
diff --git a/drivers/dma/dw-edma/dw-hdma-v0-core.c b/drivers/dma/dw-edma/dw-hdma-v0-core.c
index 52c6ea09fcab5..4cff839022213 100644
--- a/drivers/dma/dw-edma/dw-hdma-v0-core.c
+++ b/drivers/dma/dw-edma/dw-hdma-v0-core.c
@@ -272,18 +272,12 @@ static void dw_hdma_v0_core_ll_start(struct dw_edma_chunk *chunk, bool first)
 	SET_CH_32(dw, chan->dir, chan->id, doorbell, HDMA_V0_DOORBELL_START);
 }
 
-static void dw_hdma_v0_core_non_ll_start(struct dw_edma_chunk *chunk)
+static void dw_hdma_v0_core_non_ll_start(struct dw_edma_chan *chan,
+					 struct dw_edma_burst *child)
 {
-	struct dw_edma_chan *chan = chunk->chan;
 	struct dw_edma *dw = chan->dw;
-	struct dw_edma_burst *child;
 	u32 val;
 
-	child = list_first_entry_or_null(&chunk->burst->list,
-					 struct dw_edma_burst, list);
-	if (!child)
-		return;
-
 	SET_CH_32(dw, chan->dir, chan->id, ch_en, HDMA_V0_CH_EN);
 
 	/* Source address */
@@ -324,16 +318,6 @@ static void dw_hdma_v0_core_non_ll_start(struct dw_edma_chunk *chunk)
 		  HDMA_V0_DOORBELL_START);
 }
 
-static void dw_hdma_v0_core_start(struct dw_edma_chunk *chunk, bool first)
-{
-	struct dw_edma_chan *chan = chunk->chan;
-
-	if (chan->non_ll)
-		dw_hdma_v0_core_non_ll_start(chunk);
-	else
-		dw_hdma_v0_core_ll_start(chunk, first);
-}
-
 static void dw_hdma_v0_core_ch_config(struct dw_edma_chan *chan)
 {
 	struct dw_edma *dw = chan->dw;
@@ -399,7 +383,8 @@ static const struct dw_edma_core_ops dw_hdma_v0_core = {
 	.ch_count = dw_hdma_v0_core_ch_count,
 	.ch_status = dw_hdma_v0_core_ch_status,
 	.handle_int = dw_hdma_v0_core_handle_int,
-	.start = dw_hdma_v0_core_start,
+	.start = dw_hdma_v0_core_ll_start,
+	.non_ll_start = dw_hdma_v0_core_non_ll_start,
 	.ll_data = dw_hdma_v0_core_ll_data,
 	.ll_link = dw_hdma_v0_core_ll_link,
 	.ch_doorbell = dw_hdma_v0_core_ch_doorbell,

-- 
2.43.0