drivers: imx: Select DONE bit from software

With multi-fifo we need to enable done bit from software
as we have multiple fifos.

For this we make use of sw_done_sel configurations bits and
write proper bits into SDMA_DONE0 register.

For more information see `SDMA DONE0 Configuration
(SDMAARMx_DONE0_CONFIG)` SDMA register from i.MX8 reference manual.

Signed-off-by: Daniel Baluta <[email protected]>

Author: dbaluta

src/drivers/imx/sdma.c

@@ -441,13 +441,22 @@ static struct dma_chan_data *sdma_channel_get(struct dma *dma,
 
 static void sdma_enable_event(struct dma_chan_data *channel, int eventnum)
 {
+	struct sdma_chan *pdata = dma_chan_get_data(channel);
+
 	tr_dbg(&sdma_tr, "sdma_enable_event(%d, %d)", channel->index, eventnum);
 
 	if (eventnum < 0 || eventnum > SDMA_HWEVENTS_COUNT)
 		return; /* No change if request is invalid */
 
 	dma_reg_update_bits(channel->dma, SDMA_CHNENBL(eventnum),
 			    BIT(channel->index), BIT(channel->index));
+
+	if (pdata->sw_done_sel & BIT(31)) {
+		unsigned int done0;
+
+		done0 = SDMA_DONE0_CONFIG_DONE_SEL | ~SDMA_DONE0_CONFIG_DONE_DIS;
+		dma_reg_update_bits(channel->dma, SDMA_DONE0_CONFIG, 0xFF, done0);
+	}
 }
 
 static void sdma_disable_event(struct dma_chan_data *channel, int eventnum)

src/include/sof/drivers/sdma.h

@@ -89,6 +89,9 @@
 #define SDMA_DONE0_CONFIG	0x1000
 #define SDMA_DONE1_CONFIG	0x1004
 
+#define SDMA_DONE0_CONFIG_DONE_SEL	BIT(7)
+#define SDMA_DONE0_CONFIG_DONE_DIS	BIT(6)
+
 #define SDMA_WATERMARK_LEVEL_N_FIFOS(x)		SET_BITS(15, 12, x)
 #define SDMA_WATERMARK_LEVEL_OFF_FIFOS(x)	SET_BITS(19, 16, x)
 #define SDMA_WATERMARK_LEVEL_WORDS_PER_FIFO(x)	SET_BITS(31, 28, x)