[alsa-devel] [PATCH 7/7] ASoC: amd: enabling bt i2s config after acp reset

[Vijendar Mukunda]

after acp reset , it requires to reprogram bt i2s config
mux pins to enable bt i2s instance.
added bt i2s enablement sequence during acp init.

Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda at amd.com>
Reviewed-by: Alex Deucher <alexander.deucher at amd.com>
---
 sound/soc/amd/acp-pcm-dma.c | 5 +++++
 sound/soc/amd/acp.h         | 2 ++
 2 files changed, 7 insertions(+)

diff --git a/sound/soc/amd/acp-pcm-dma.c b/sound/soc/amd/acp-pcm-dma.c
index a6787ac..f7471ae 100644
--- a/sound/soc/amd/acp-pcm-dma.c
+++ b/sound/soc/amd/acp-pcm-dma.c
@@ -604,6 +604,11 @@ static int acp_init(void __iomem *acp_mmio, u32 asic_type)
 	val &= ~ACP_SOFT_RESET__SoftResetAud_MASK;
 	acp_reg_write(val, acp_mmio, mmACP_SOFT_RESET);
 
+	/*For BT instance change pins from UART to BT */
+	val = acp_reg_read(acp_mmio, mmACP_BT_UART_PAD_SEL);
+	val |= ACP_BT_UART_PAD_SELECT_MASK;
+	acp_reg_write(val, acp_mmio, mmACP_BT_UART_PAD_SEL);
+
 	/* initiailize Onion control DAGB register */
 	acp_reg_write(ACP_ONION_CNTL_DEFAULT, acp_mmio,
 			mmACP_AXI2DAGB_ONION_CNTL);
diff --git a/sound/soc/amd/acp.h b/sound/soc/amd/acp.h
index cd83a03..84b3850 100644
--- a/sound/soc/amd/acp.h
+++ b/sound/soc/amd/acp.h
@@ -108,6 +108,8 @@
 #define ACP_I2S_BT_16BIT_RESOLUTION_EN	0x04
 #define I2S_SP_INSTANCE 1
 #define I2S_BT_INSTANCE 3
+#define ACP_BT_UART_PAD_SELECT_MASK	0x1
+
 enum acp_dma_priority_level {
 	/* 0x0 Specifies the DMA channel is given normal priority */
 	ACP_DMA_PRIORITY_LEVEL_NORMAL = 0x0,
-- 
2.7.4