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-rw-r--r--src/soc/nvidia/tegra210/dma.c16
1 files changed, 14 insertions, 2 deletions
diff --git a/src/soc/nvidia/tegra210/dma.c b/src/soc/nvidia/tegra210/dma.c
index 9f04e9777f..fb986923f9 100644
--- a/src/soc/nvidia/tegra210/dma.c
+++ b/src/soc/nvidia/tegra210/dma.c
@@ -69,9 +69,21 @@ int dma_busy(struct apb_dma_channel * const channel)
* In continuous mode, the BSY_n bit in APB_DMA_STATUS and
* BSY in APBDMACHAN_CHANNEL_n_STA_0 will remain set as '1' so long
* as the channel is enabled. So for this function we'll use the
- * DMA_ACTIVITY bit.
+ * DMA_ACTIVITY bit in case of continuous mode.
+ *
+ * However, for ONCE mode, the BSY_n bit in APB_DMA_STATUS will be used
+ * to determine end of dma operation.
*/
- return read32(&channel->regs->sta) & APB_STA_DMA_ACTIVITY ? 1 : 0;
+ uint32_t bit;
+
+ if (read32(&channel->regs->csr) & APB_CSR_ONCE)
+ /* Once mode */
+ bit = APB_STA_BSY;
+ else
+ /* Continuous mode */
+ bit = APB_STA_DMA_ACTIVITY;
+
+ return read32(&channel->regs->sta) & bit ? 1 : 0;
}
/* claim a DMA channel */
struct apb_dma_channel * const dma_claim(void)