dw-dma: clear block/transfer irq after stop

Clears block/transfer interrupts after stopping the DMA channel. It prevents sudden interrupt trigger after enabling different DMA channel than the one previously stopped. Signed-off-by: Tomasz Lauda <[email protected]>
lyakh · Apr 25, 2019 · 433de9f · 433de9f
1 parent 5d49c72
commit 433de9f
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/src/drivers/dw/dma.c b/src/drivers/dw/dma.c
@@ -480,13 +480,19 @@ static int dw_dma_stop(struct dma *dma, int channel)
 	dw_dma_interrupt_unregister(dma, channel);
 
 #if CONFIG_HW_LLI
+	/* clear block interrupt */
+	dw_write(dma, DW_CLEAR_BLOCK, DW_CHAN(channel));
+
 	for (i = 0; i < chan->desc_count; i++) {
 		lli->ctrl_hi &= ~DW_CTLH_DONE(1);
 		lli++;
 	}
 
 	dcache_writeback_region(chan->lli,
 				sizeof(struct dw_lli) * chan->desc_count);
+#else
+	/* clear transfer interrupt */
+	dw_write(dma, DW_CLEAR_TFR, DW_CHAN(channel));
 #endif
 
 	chan->status = COMP_STATE_PREPARE;