ASoC: AMD: Audio buffer related changes for Stoney

Stoney uses 16kb SRAM memory for playback and 16Kb
for capture.Modified Max buffer size to have the
correct mapping between System Memory and SRAM.

Added snd_pcm_hardware structures for playback
and capture for Stoney.
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

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

@@ -35,6 +35,11 @@
 #define MAX_BUFFER (PLAYBACK_MAX_PERIOD_SIZE * PLAYBACK_MAX_NUM_PERIODS)
 #define MIN_BUFFER MAX_BUFFER
 
+#define ST_PLAYBACK_MAX_PERIOD_SIZE 8192
+#define ST_CAPTURE_MAX_PERIOD_SIZE  ST_PLAYBACK_MAX_PERIOD_SIZE
+#define ST_MAX_BUFFER (ST_PLAYBACK_MAX_PERIOD_SIZE * PLAYBACK_MAX_NUM_PERIODS)
+#define ST_MIN_BUFFER ST_MAX_BUFFER
+
 static const struct snd_pcm_hardware acp_pcm_hardware_playback = {
 	.info = SNDRV_PCM_INFO_INTERLEAVED |
 		SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP |
@@ -73,6 +78,44 @@ static const struct snd_pcm_hardware acp_pcm_hardware_capture = {
 	.periods_max = CAPTURE_MAX_NUM_PERIODS,
 };
 
+static const struct snd_pcm_hardware acp_st_pcm_hardware_playback = {
+	.info = SNDRV_PCM_INFO_INTERLEAVED |
+		SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP |
+		SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_BATCH |
+		SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME,
+	.formats = SNDRV_PCM_FMTBIT_S16_LE |
+		SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE,
+	.channels_min = 1,
+	.channels_max = 8,
+	.rates = SNDRV_PCM_RATE_8000_96000,
+	.rate_min = 8000,
+	.rate_max = 96000,
+	.buffer_bytes_max = ST_MAX_BUFFER,
+	.period_bytes_min = PLAYBACK_MIN_PERIOD_SIZE,
+	.period_bytes_max = ST_PLAYBACK_MAX_PERIOD_SIZE,
+	.periods_min = PLAYBACK_MIN_NUM_PERIODS,
+	.periods_max = PLAYBACK_MAX_NUM_PERIODS,
+};
+
+static const struct snd_pcm_hardware acp_st_pcm_hardware_capture = {
+	.info = SNDRV_PCM_INFO_INTERLEAVED |
+		SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP |
+		SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_BATCH |
+		SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME,
+	.formats = SNDRV_PCM_FMTBIT_S16_LE |
+		SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE,
+	.channels_min = 1,
+	.channels_max = 2,
+	.rates = SNDRV_PCM_RATE_8000_48000,
+	.rate_min = 8000,
+	.rate_max = 48000,
+	.buffer_bytes_max = ST_MAX_BUFFER,
+	.period_bytes_min = CAPTURE_MIN_PERIOD_SIZE,
+	.period_bytes_max = ST_CAPTURE_MAX_PERIOD_SIZE,
+	.periods_min = CAPTURE_MIN_NUM_PERIODS,
+	.periods_max = CAPTURE_MAX_NUM_PERIODS,
+};
+
 static u32 acp_reg_read(void __iomem *acp_mmio, u32 reg)
 {
 	return readl(acp_mmio + (reg * 4));
@@ -664,10 +707,23 @@ static int acp_dma_open(struct snd_pcm_substream *substream)
 	if (adata == NULL)
 		return -ENOMEM;
 
-	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
-		runtime->hw = acp_pcm_hardware_playback;
-	else
-		runtime->hw = acp_pcm_hardware_capture;
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+		switch (intr_data->asic_type) {
+		case CHIP_STONEY:
+			runtime->hw = acp_st_pcm_hardware_playback;
+			break;
+		default:
+			runtime->hw = acp_pcm_hardware_playback;
+		}
+	} else {
+		switch (intr_data->asic_type) {
+		case CHIP_STONEY:
+			runtime->hw = acp_st_pcm_hardware_capture;
+			break;
+		default:
+			runtime->hw = acp_pcm_hardware_capture;
+		}
+	}
 
 	ret = snd_pcm_hw_constraint_integer(runtime,
 					    SNDRV_PCM_HW_PARAM_PERIODS);
@@ -905,10 +961,27 @@ static int acp_dma_trigger(struct snd_pcm_substream *substream, int cmd)
 
 static int acp_dma_new(struct snd_soc_pcm_runtime *rtd)
 {
-	return snd_pcm_lib_preallocate_pages_for_all(rtd->pcm,
+	int ret;
+	struct audio_drv_data *adata = dev_get_drvdata(rtd->platform->dev);
+
+	switch (adata->asic_type) {
+	case CHIP_STONEY:
+		ret = snd_pcm_lib_preallocate_pages_for_all(rtd->pcm,
+							SNDRV_DMA_TYPE_DEV,
+							NULL, ST_MIN_BUFFER,
+							ST_MAX_BUFFER);
+		break;
+	default:
+		ret = snd_pcm_lib_preallocate_pages_for_all(rtd->pcm,
 							SNDRV_DMA_TYPE_DEV,
 							NULL, MIN_BUFFER,
 							MAX_BUFFER);
+		break;
+	}
+	if (ret < 0)
+		dev_err(rtd->platform->dev,
+				"buffer preallocation failer error:%d\n", ret);
+	return ret;
 }
 
 static int acp_dma_close(struct snd_pcm_substream *substream)