ASoC: amd: add I2S MICSP instance support

Add I2S MICSP instance support for Stoney variant.
Signed-off-by: NVijendar Mukunda <Vijendar.Mukunda@amd.com>
Link: https://lore.kernel.org/r/20220701114107.1105948-4-Vijendar.Mukunda@amd.comSigned-off-by: NMark Brown <broonie@kernel.org>

sound/soc/amd/acp-pcm-dma.c

@@ -433,6 +433,7 @@ static void acp_dma_start(void __iomem *acp_mmio, u16 ch_num, bool is_circular)
 	case I2S_TO_ACP_DMA_CH_NUM:
 	case ACP_TO_I2S_DMA_BT_INSTANCE_CH_NUM:
 	case I2S_TO_ACP_DMA_BT_INSTANCE_CH_NUM:
+	case ACP_TO_I2S_DMA_MICSP_INSTANCE_CH_NUM:
 		dma_ctrl |= ACP_DMA_CNTL_0__DMAChIOCEn_MASK;
 		break;
 	default:
@@ -710,6 +711,13 @@ static irqreturn_t dma_irq_handler(int irq, void *arg)
 			      acp_mmio, mmACP_EXTERNAL_INTR_STAT);
 	}
 
+	if ((intr_flag & BIT(ACP_TO_I2S_DMA_MICSP_INSTANCE_CH_NUM)) != 0) {
+		valid_irq = true;
+		snd_pcm_period_elapsed(irq_data->play_i2s_micsp_stream);
+		acp_reg_write((intr_flag & BIT(ACP_TO_I2S_DMA_MICSP_INSTANCE_CH_NUM)) << 16,
+			      acp_mmio, mmACP_EXTERNAL_INTR_STAT);
+	}
+
 	if ((intr_flag & BIT(ACP_TO_I2S_DMA_BT_INSTANCE_CH_NUM)) != 0) {
 		valid_irq = true;
 		snd_pcm_period_elapsed(irq_data->play_i2sbt_stream);
@@ -807,7 +815,8 @@ static int acp_dma_open(struct snd_soc_component *component,
 	 * stream is not closed
 	 */
 	if (!intr_data->play_i2ssp_stream && !intr_data->capture_i2ssp_stream &&
-	    !intr_data->play_i2sbt_stream && !intr_data->capture_i2sbt_stream)
+	    !intr_data->play_i2sbt_stream && !intr_data->capture_i2sbt_stream &&
+	    !intr_data->play_i2s_micsp_stream)
 		acp_reg_write(1, adata->acp_mmio, mmACP_EXTERNAL_INTR_ENB);
 
 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
@@ -867,6 +876,9 @@ static int acp_dma_hw_params(struct snd_soc_component *component,
 			case I2S_BT_INSTANCE:
 				val |= ACP_I2S_BT_16BIT_RESOLUTION_EN;
 				break;
+			case I2S_MICSP_INSTANCE:
+				val |= ACP_I2S_MICSP_16BIT_RESOLUTION_EN;
+				break;
 			case I2S_SP_INSTANCE:
 			default:
 				val |= ACP_I2S_SP_16BIT_RESOLUTION_EN;
@@ -876,6 +888,7 @@ static int acp_dma_hw_params(struct snd_soc_component *component,
 			case I2S_BT_INSTANCE:
 				val |= ACP_I2S_BT_16BIT_RESOLUTION_EN;
 				break;
+			case I2S_MICSP_INSTANCE:
 			case I2S_SP_INSTANCE:
 			default:
 				val |= ACP_I2S_MIC_16BIT_RESOLUTION_EN;
@@ -901,6 +914,27 @@ static int acp_dma_hw_params(struct snd_soc_component *component,
 					mmACP_I2S_BT_TRANSMIT_BYTE_CNT_LOW;
 			adata->play_i2sbt_stream = substream;
 			break;
+		case I2S_MICSP_INSTANCE:
+			switch (adata->asic_type) {
+			case CHIP_STONEY:
+				rtd->pte_offset = ACP_ST_PLAYBACK_PTE_OFFSET;
+				break;
+			default:
+				rtd->pte_offset = ACP_PLAYBACK_PTE_OFFSET;
+			}
+			rtd->ch1 = SYSRAM_TO_ACP_MICSP_INSTANCE_CH_NUM;
+			rtd->ch2 = ACP_TO_I2S_DMA_MICSP_INSTANCE_CH_NUM;
+			rtd->sram_bank = ACP_SRAM_BANK_1_ADDRESS;
+			rtd->destination = TO_ACP_I2S_2;
+			rtd->dma_dscr_idx_1 = PLAYBACK_START_DMA_DESCR_CH4;
+			rtd->dma_dscr_idx_2 = PLAYBACK_START_DMA_DESCR_CH5;
+			rtd->byte_cnt_high_reg_offset =
+					mmACP_I2S_MICSP_TRANSMIT_BYTE_CNT_HIGH;
+			rtd->byte_cnt_low_reg_offset =
+					mmACP_I2S_MICSP_TRANSMIT_BYTE_CNT_LOW;
+
+			adata->play_i2s_micsp_stream = substream;
+			break;
 		case I2S_SP_INSTANCE:
 		default:
 			switch (adata->asic_type) {
@@ -939,6 +973,7 @@ static int acp_dma_hw_params(struct snd_soc_component *component,
 			rtd->dma_curr_dscr = mmACP_DMA_CUR_DSCR_11;
 			adata->capture_i2sbt_stream = substream;
 			break;
+		case I2S_MICSP_INSTANCE:
 		case I2S_SP_INSTANCE:
 		default:
 			rtd->pte_offset = ACP_CAPTURE_PTE_OFFSET;
@@ -1160,6 +1195,9 @@ static int acp_dma_close(struct snd_soc_component *component,
 		case I2S_BT_INSTANCE:
 			adata->play_i2sbt_stream = NULL;
 			break;
+		case I2S_MICSP_INSTANCE:
+			adata->play_i2s_micsp_stream = NULL;
+			break;
 		case I2S_SP_INSTANCE:
 		default:
 			adata->play_i2ssp_stream = NULL;
@@ -1181,6 +1219,7 @@ static int acp_dma_close(struct snd_soc_component *component,
 		case I2S_BT_INSTANCE:
 			adata->capture_i2sbt_stream = NULL;
 			break;
+		case I2S_MICSP_INSTANCE:
 		case I2S_SP_INSTANCE:
 		default:
 			adata->capture_i2ssp_stream = NULL;
@@ -1197,7 +1236,8 @@ static int acp_dma_close(struct snd_soc_component *component,
 	 * another stream is also not active.
 	 */
 	if (!adata->play_i2ssp_stream && !adata->capture_i2ssp_stream &&
-	    !adata->play_i2sbt_stream && !adata->capture_i2sbt_stream)
+	    !adata->play_i2sbt_stream && !adata->capture_i2sbt_stream &&
+	    !adata->play_i2s_micsp_stream)
 		acp_reg_write(0, adata->acp_mmio, mmACP_EXTERNAL_INTR_ENB);
 	kfree(rtd);
 	return 0;
@@ -1245,6 +1285,7 @@ static int acp_audio_probe(struct platform_device *pdev)
 	audio_drv_data->capture_i2ssp_stream = NULL;
 	audio_drv_data->play_i2sbt_stream = NULL;
 	audio_drv_data->capture_i2sbt_stream = NULL;
+	audio_drv_data->play_i2s_micsp_stream = NULL;
 
 	audio_drv_data->asic_type =  *pdata;
 
@@ -1333,6 +1374,11 @@ static int acp_pcm_resume(struct device *dev)
 		config_acp_dma(adata->acp_mmio, rtd, adata->asic_type);
 	}
 	if (adata->asic_type != CHIP_CARRIZO) {
+		if (adata->play_i2s_micsp_stream &&
+		    adata->play_i2s_micsp_stream->runtime) {
+			rtd = adata->play_i2s_micsp_stream->runtime->private_data;
+			config_acp_dma(adata->acp_mmio, rtd, adata->asic_type);
+		}
 		if (adata->play_i2sbt_stream &&
 		    adata->play_i2sbt_stream->runtime) {
 			rtd = adata->play_i2sbt_stream->runtime->private_data;

sound/soc/amd/acp.h

@@ -55,6 +55,7 @@
 
 #define I2S_SP_INSTANCE                 0x01
 #define I2S_BT_INSTANCE                 0x02
+#define I2S_MICSP_INSTANCE		0x03
 #define CAP_CHANNEL0			0x00
 #define CAP_CHANNEL1			0x01
 
@@ -85,6 +86,10 @@
 #define I2S_TO_ACP_DMA_BT_INSTANCE_CH_NUM 10
 #define ACP_TO_SYSRAM_BT_INSTANCE_CH_NUM 11
 
+/* Playback DMA channels for I2S MICSP instance */
+#define SYSRAM_TO_ACP_MICSP_INSTANCE_CH_NUM  4
+#define ACP_TO_I2S_DMA_MICSP_INSTANCE_CH_NUM 5
+
 #define NUM_DSCRS_PER_CHANNEL 2
 
 #define PLAYBACK_START_DMA_DESCR_CH12 0
@@ -108,8 +113,15 @@
 #define CAPTURE_START_DMA_DESCR_CH11 14
 #define CAPTURE_END_DMA_DESCR_CH11 15
 
+/* I2S MICSP Instance DMA Descriptors */
+#define PLAYBACK_START_DMA_DESCR_CH4 0
+#define PLAYBACK_END_DMA_DESCR_CH4 1
+#define PLAYBACK_START_DMA_DESCR_CH5 2
+#define PLAYBACK_END_DMA_DESCR_CH5 3
+
 #define mmACP_I2S_16BIT_RESOLUTION_EN       0x5209
 #define ACP_I2S_MIC_16BIT_RESOLUTION_EN 0x01
+#define ACP_I2S_MICSP_16BIT_RESOLUTION_EN 0x01
 #define ACP_I2S_SP_16BIT_RESOLUTION_EN	0x02
 #define ACP_I2S_BT_16BIT_RESOLUTION_EN	0x04
 #define ACP_BT_UART_PAD_SELECT_MASK	0x1
@@ -149,6 +161,7 @@ struct audio_drv_data {
 	struct snd_pcm_substream *capture_i2ssp_stream;
 	struct snd_pcm_substream *play_i2sbt_stream;
 	struct snd_pcm_substream *capture_i2sbt_stream;
+	struct snd_pcm_substream *play_i2s_micsp_stream;
 	void __iomem *acp_mmio;
 	u32 asic_type;
 	snd_pcm_sframes_t delay;