[alsa-devel] [PATCH 1/7] ASoC: amd: dma driver changes for BT I2S controller instance

Vijendar Mukunda Vijendar.Mukunda at amd.com
Mon Mar 12 07:34:14 CET 2018


With in ACP, There are three I2S controllers can be configured/enabled
( I2S SP, I2S MICSP, I2S BT).
Default enabled I2S controller instance is I2S SP.
This patch provides required changes to support I2S BT controller Instance.

BT I2S is bi-directional dai and same is used for playback and capture.
Added condition checks to differentiate I2S instance based on cpu dai name.

Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda at amd.com>
Signed-off-by: Akshu Agrawal <akshu.agrawal at amd.com>
---
 sound/soc/amd/acp-pcm-dma.c | 112 +++++++++++++++++++++++++++++++++++---------
 sound/soc/amd/acp.h         |   8 ++++
 2 files changed, 99 insertions(+), 21 deletions(-)

diff --git a/sound/soc/amd/acp-pcm-dma.c b/sound/soc/amd/acp-pcm-dma.c
index 540088d..4611706 100644
--- a/sound/soc/amd/acp-pcm-dma.c
+++ b/sound/soc/amd/acp-pcm-dma.c
@@ -710,7 +710,32 @@ static int acp_dma_open(struct snd_pcm_substream *substream)
 		default:
 			runtime->hw = acp_pcm_hardware_playback;
 		}
+		/* ACP DMA Driver implemented based on ACP 2.x stack.
+		 * It uses Designware I2S controller.
+		 * AMD Gpu Driver creates device instances for playback & capture scenarios
+		 * for both the I2S controller instances.( I2S SP & I2S BT).
+		 * It has fixed mapping as mentioned below.
+		 * designware-i2s.1.auto cpu dai will be used for I2S SP Instance playback device.
+		 * designware-i2s.2.auto cpu dai will be used for I2S SP Instance capture device.
+		 * designware-i2s.3.auto cpu dai will be used for I2S BT Instance playback/capture device.
+		 */
+		if (strcmp(prtd->cpu_dai->name, "designware-i2s.1.auto") == 0) {
+			adata->i2s_play_instance = I2S_SP_INSTANCE;
+			adata->i2ssp_renderbytescount = 0;
+		} else if (strcmp(prtd->cpu_dai->name, "designware-i2s.3.auto") == 0) {
+			adata->i2s_play_instance = I2S_BT_INSTANCE;
+			adata->i2sbt_renderbytescount = 0;
+		} else
+			return -EINVAL;
 	} else {
+		if (strcmp(prtd->cpu_dai->name, "designware-i2s.2.auto") == 0) {
+			adata->i2s_capture_instance = I2S_SP_INSTANCE;
+			adata->i2ssp_capturebytescount = 0;
+		} else if (strcmp(prtd->cpu_dai->name, "designware-i2s.3.auto") == 0) {
+			adata->i2s_capture_instance = I2S_BT_INSTANCE;
+			adata->i2sbt_capturebytescount = 0;
+		} else
+			return -EINVAL;
 		switch (intr_data->asic_type) {
 		case CHIP_STONEY:
 			runtime->hw = acp_st_pcm_hardware_capture;
@@ -736,11 +761,19 @@ static int acp_dma_open(struct snd_pcm_substream *substream)
 	 * This enablement is not required for another stream, if current
 	 * stream is not closed
 	*/
-	if (!intr_data->play_i2ssp_stream && !intr_data->capture_i2ssp_stream)
+	if (!intr_data->play_i2ssp_stream && !intr_data->capture_i2ssp_stream &&
+		!intr_data->play_i2sbt_stream && !intr_data->capture_i2sbt_stream)
 		acp_reg_write(1, adata->acp_mmio, mmACP_EXTERNAL_INTR_ENB);
 
 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
-		intr_data->play_i2ssp_stream = substream;
+		switch (adata->i2s_play_instance) {
+		case I2S_BT_INSTANCE:
+			intr_data->play_i2sbt_stream = substream;
+			break;
+		case I2S_SP_INSTANCE:
+		default:
+			intr_data->play_i2ssp_stream = substream;
+		}
 		/* For Stoney, Memory gating is disabled,i.e SRAM Banks
 		 * won't be turned off. The default state for SRAM banks is ON.
 		 * Setting SRAM bank state code skipped for STONEY platform.
@@ -751,7 +784,14 @@ static int acp_dma_open(struct snd_pcm_substream *substream)
 							bank, true);
 		}
 	} else {
-		intr_data->capture_i2ssp_stream = substream;
+		switch (adata->i2s_capture_instance) {
+		case I2S_BT_INSTANCE:
+			intr_data->capture_i2sbt_stream = substream;
+			break;
+		case I2S_SP_INSTANCE:
+		default:
+			intr_data->capture_i2ssp_stream = substream;
+		}
 		if (intr_data->asic_type != CHIP_STONEY) {
 			for (bank = 5; bank <= 8; bank++)
 				acp_set_sram_bank_state(intr_data->acp_mmio,
@@ -1010,34 +1050,48 @@ static int acp_dma_close(struct snd_pcm_substream *substream)
 	struct snd_soc_component *component = snd_soc_rtdcom_lookup(prtd, DRV_NAME);
 	struct audio_drv_data *adata = dev_get_drvdata(component->dev);
 
-	kfree(rtd);
-
 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
-		adata->play_i2ssp_stream = NULL;
-		/* For Stoney, Memory gating is disabled,i.e SRAM Banks
-		 * won't be turned off. The default state for SRAM banks is ON.
-		 * Setting SRAM bank state code skipped for STONEY platform.
-		 * added condition checks for Carrizo platform only
-		 */
-		if (adata->asic_type != CHIP_STONEY) {
-			for (bank = 1; bank <= 4; bank++)
-				acp_set_sram_bank_state(adata->acp_mmio, bank,
-				false);
+		switch (rtd->i2s_play_instance) {
+		case I2S_BT_INSTANCE:
+			adata->play_i2sbt_stream = NULL;
+			break;
+		case I2S_SP_INSTANCE:
+		default:
+			adata->play_i2ssp_stream = NULL;
+			/* For Stoney, Memory gating is disabled,i.e SRAM Banks
+			 * won't be turned off. The default state for SRAM banks is ON.
+			 * Setting SRAM bank state code skipped for STONEY platform.
+			 * added condition checks for Carrizo platform only
+			 */
+			if (adata->asic_type != CHIP_STONEY) {
+				for (bank = 1; bank <= 4; bank++)
+					acp_set_sram_bank_state(adata->acp_mmio, bank,
+							false);
+			}
 		}
 	} else  {
-		adata->capture_i2ssp_stream = NULL;
-		if (adata->asic_type != CHIP_STONEY) {
-			for (bank = 5; bank <= 8; bank++)
-				acp_set_sram_bank_state(adata->acp_mmio, bank,
-						     false);
+		switch (rtd->i2s_capture_instance) {
+		case I2S_BT_INSTANCE:
+			adata->capture_i2sbt_stream = NULL;
+			break;
+		case I2S_SP_INSTANCE:
+		default:
+			adata->capture_i2ssp_stream = NULL;
+			if (adata->asic_type != CHIP_STONEY) {
+				for (bank = 5; bank <= 8; bank++)
+					acp_set_sram_bank_state(adata->acp_mmio,
+							bank, false);
+			}
 		}
 	}
 
 	/* Disable ACP irq, when the current stream is being closed and
 	 * another stream is also not active.
 	*/
-	if (!adata->play_i2ssp_stream && !adata->capture_i2ssp_stream)
+	if (!adata->play_i2ssp_stream && !adata->capture_i2ssp_stream &&
+		!adata->play_i2sbt_stream && !adata->capture_i2sbt_stream)
 		acp_reg_write(0, adata->acp_mmio, mmACP_EXTERNAL_INTR_ENB);
+	kfree(rtd);
 
 	return 0;
 }
@@ -1089,6 +1143,8 @@ static int acp_audio_probe(struct platform_device *pdev)
 
 	audio_drv_data->play_i2ssp_stream = NULL;
 	audio_drv_data->capture_i2ssp_stream = NULL;
+	audio_drv_data->play_i2sbt_stream = NULL;
+	audio_drv_data->capture_i2sbt_stream = NULL;
 
 	audio_drv_data->asic_type =  *pdata;
 
@@ -1177,6 +1233,20 @@ static int acp_pcm_resume(struct device *dev)
 			adata->capture_i2ssp_stream->runtime->private_data,
 			adata->asic_type);
 	}
+	if (adata->asic_type != CHIP_CARRIZO) {
+		if (adata->play_i2sbt_stream &&
+			adata->play_i2sbt_stream->runtime) {
+			config_acp_dma(adata->acp_mmio,
+				adata->play_i2sbt_stream->runtime->private_data,
+				adata->asic_type);
+		}
+		if (adata->capture_i2sbt_stream &&
+			adata->capture_i2sbt_stream->runtime) {
+			config_acp_dma(adata->acp_mmio,
+				adata->capture_i2sbt_stream->runtime->private_data,
+				adata->asic_type);
+		}
+	}
 	acp_reg_write(1, adata->acp_mmio, mmACP_EXTERNAL_INTR_ENB);
 	return 0;
 }
diff --git a/sound/soc/amd/acp.h b/sound/soc/amd/acp.h
index ba01510..e8406b9 100644
--- a/sound/soc/amd/acp.h
+++ b/sound/soc/amd/acp.h
@@ -72,6 +72,8 @@
 #define mmACP_I2S_16BIT_RESOLUTION_EN       0x5209
 #define ACP_I2S_MIC_16BIT_RESOLUTION_EN 0x01
 #define ACP_I2S_SP_16BIT_RESOLUTION_EN	0x02
+#define I2S_SP_INSTANCE 1
+#define I2S_BT_INSTANCE 3
 enum acp_dma_priority_level {
 	/* 0x0 Specifies the DMA channel is given normal priority */
 	ACP_DMA_PRIORITY_LEVEL_NORMAL = 0x0,
@@ -88,12 +90,18 @@ struct audio_substream_data {
 	uint64_t size;
 	u64 i2ssp_renderbytescount;
 	u64 i2ssp_capturebytescount;
+	u64 i2sbt_renderbytescount;
+	u64 i2sbt_capturebytescount;
 	void __iomem *acp_mmio;
+	u16 i2s_play_instance;
+	u16 i2s_capture_instance;
 };
 
 struct audio_drv_data {
 	struct snd_pcm_substream *play_i2ssp_stream;
 	struct snd_pcm_substream *capture_i2ssp_stream;
+	struct snd_pcm_substream *play_i2sbt_stream;
+	struct snd_pcm_substream *capture_i2sbt_stream;
 	void __iomem *acp_mmio;
 	u32 asic_type;
 };
-- 
2.7.4



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