ASoC: amd: ps: add comments for DMA irq bits mapping

Add comments for DMA stream id and IRQ bit mapping in
ACP_EXTERNAL_CNTL & ACP_EXTERNAL_CNTL1 registers for
SDW0 and SDW1 manager instances.

Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
Link: https://lore.kernel.org/r/20230626105356.2580125-1-Vijendar.Mukunda@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/amd/ps/acp63.h b/sound/soc/amd/ps/acp63.h
index e96e6dc9d90f4eb4f24f2ee487bc259ec111bde9..733a16e23d3210c3788a16d7111f112a6b90d8ec 100644 (file)
--- a/sound/soc/amd/ps/acp63.h
+++ b/sound/soc/amd/ps/acp63.h
@@ -116,8 +116,28 @@
 #define ACP63_SDW0_DMA_MAX_STREAMS     6
 #define ACP63_SDW1_DMA_MAX_STREAMS     2
 #define ACP_P1_AUDIO_TX_THRESHOLD      6
+
+/*
+ * Below entries describes SDW0 instance DMA stream id and DMA irq bit mapping
+ * in ACP_EXTENAL_INTR_CNTL register.
+ * Stream id           IRQ Bit
+ * 0 (SDW0_AUDIO0_TX)  28
+ * 1 (SDW0_AUDIO1_TX)  26
+ * 2 (SDW0_AUDIO2_TX)  24
+ * 3 (SDW0_AUDIO0_RX)  27
+ * 4 (SDW0_AUDIO1_RX)  25
+ * 5 (SDW0_AUDIO2_RX)  23
+ */
 #define SDW0_DMA_TX_IRQ_MASK(i)        (ACP_AUDIO0_TX_THRESHOLD - (2 * (i)))
 #define SDW0_DMA_RX_IRQ_MASK(i)        (ACP_AUDIO0_RX_THRESHOLD - (2 * (i)))
+
+/*
+ * Below entries describes SDW1 instance DMA stream id and DMA irq bit mapping
+ * in ACP_EXTENAL_INTR_CNTL1 register.
+ * Stream id           IRQ Bit
+ * 0 (SDW1_AUDIO1_TX)  6
+ * 1 (SDW1_AUDIO1_RX)  5
+ */
 #define SDW1_DMA_IRQ_MASK(i)   (ACP_P1_AUDIO_TX_THRESHOLD - (i))
 
 #define ACP_DELAY_US           5