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From:   Vijendar Mukunda <Vijendar.Mukunda@amd.com>
CC:     Vijendar Mukunda <Vijendar.Mukunda@amd.com>,
        Liam Girdwood <lgirdwood@gmail.com>,
        Mark Brown <broonie@kernel.org>,
        Jaroslav Kysela <perex@perex.cz>,
        Takashi Iwai <tiwai@suse.com>,
        Alex Deucher <alexander.deucher@amd.com>,
        Daniel Kurtz <djkurtz@chromium.org>,
        "Jason Clinton" <jclinton@chromium.org>,
        Akshu Agrawal <akshu.agrawal@amd.com>,
        Guenter Roeck <linux@roeck-us.net>,
        Kate Stewart <kstewart@linuxfoundation.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        "moderated list:SOUND - SOC LAYER / DYNAMIC AUDIO POWER MANAGEM..." 
        <alsa-devel@alsa-project.org>,
        open list <linux-kernel@vger.kernel.org>
Subject: [PATCH V2 02/10] ASoC: amd: added byte count register offset variables to rtd
Date:   Tue, 8 May 2018 10:17:45 +0530
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Added byte count register offset variables to audio_substream_data
structure. Modified dma pointer callback.

Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
Reviewed-by: Daniel Kurtz <djkurtz@chromium.org>
---
v1->v2: Fixed Indentation issues
 sound/soc/amd/acp-pcm-dma.c | 36 +++++++++++++++---------------------
 sound/soc/amd/acp.h         |  2 ++
 2 files changed, 17 insertions(+), 21 deletions(-)

diff --git a/sound/soc/amd/acp-pcm-dma.c b/sound/soc/amd/acp-pcm-dma.c
index e9736fe..6e338fe 100644
--- a/sound/soc/amd/acp-pcm-dma.c
+++ b/sound/soc/amd/acp-pcm-dma.c
@@ -793,12 +793,18 @@ static int acp_dma_hw_params(struct snd_pcm_substream *substream,
 		rtd->destination = TO_ACP_I2S_1;
 		rtd->dma_dscr_idx_1 = PLAYBACK_START_DMA_DESCR_CH12;
 		rtd->dma_dscr_idx_2 = PLAYBACK_START_DMA_DESCR_CH13;
+		rtd->byte_cnt_high_reg_offset =
+				mmACP_I2S_TRANSMIT_BYTE_CNT_HIGH;
+		rtd->byte_cnt_low_reg_offset = mmACP_I2S_TRANSMIT_BYTE_CNT_LOW;
 	} else {
 		rtd->ch1 = ACP_TO_SYSRAM_CH_NUM;
 		rtd->ch2 = I2S_TO_ACP_DMA_CH_NUM;
 		rtd->destination = FROM_ACP_I2S_1;
 		rtd->dma_dscr_idx_1 = CAPTURE_START_DMA_DESCR_CH14;
 		rtd->dma_dscr_idx_2 = CAPTURE_START_DMA_DESCR_CH15;
+		rtd->byte_cnt_high_reg_offset =
+				mmACP_I2S_RECEIVED_BYTE_CNT_HIGH;
+		rtd->byte_cnt_low_reg_offset = mmACP_I2S_RECEIVED_BYTE_CNT_LOW;
 	}
 
 	size = params_buffer_bytes(params);
@@ -834,26 +840,15 @@ static int acp_dma_hw_free(struct snd_pcm_substream *substream)
 	return snd_pcm_lib_free_pages(substream);
 }
 
-static u64 acp_get_byte_count(void __iomem *acp_mmio, int stream)
+static u64 acp_get_byte_count(struct audio_substream_data *rtd)
 {
-	union acp_dma_count playback_dma_count;
-	union acp_dma_count capture_dma_count;
-	u64 bytescount = 0;
+	union acp_dma_count byte_count;
 
-	if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
-		playback_dma_count.bcount.high = acp_reg_read(acp_mmio,
-					mmACP_I2S_TRANSMIT_BYTE_CNT_HIGH);
-		playback_dma_count.bcount.low  = acp_reg_read(acp_mmio,
-					mmACP_I2S_TRANSMIT_BYTE_CNT_LOW);
-		bytescount = playback_dma_count.bytescount;
-	} else {
-		capture_dma_count.bcount.high = acp_reg_read(acp_mmio,
-					mmACP_I2S_RECEIVED_BYTE_CNT_HIGH);
-		capture_dma_count.bcount.low  = acp_reg_read(acp_mmio,
-					mmACP_I2S_RECEIVED_BYTE_CNT_LOW);
-		bytescount = capture_dma_count.bytescount;
-	}
-	return bytescount;
+	byte_count.bcount.high = acp_reg_read(rtd->acp_mmio,
+					      rtd->byte_cnt_high_reg_offset);
+	byte_count.bcount.low  = acp_reg_read(rtd->acp_mmio,
+					      rtd->byte_cnt_low_reg_offset);
+	return byte_count.bytescount;
 }
 
 static snd_pcm_uframes_t acp_dma_pointer(struct snd_pcm_substream *substream)
@@ -869,7 +864,7 @@ static snd_pcm_uframes_t acp_dma_pointer(struct snd_pcm_substream *substream)
 		return -EINVAL;
 
 	buffersize = frames_to_bytes(runtime, runtime->buffer_size);
-	bytescount = acp_get_byte_count(rtd->acp_mmio, substream->stream);
+	bytescount = acp_get_byte_count(rtd);
 
 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 		if (bytescount > rtd->i2ssp_renderbytescount)
@@ -925,8 +920,7 @@ static int acp_dma_trigger(struct snd_pcm_substream *substream, int cmd)
 	case SNDRV_PCM_TRIGGER_START:
 	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 	case SNDRV_PCM_TRIGGER_RESUME:
-		bytescount = acp_get_byte_count(rtd->acp_mmio,
-						substream->stream);
+		bytescount = acp_get_byte_count(rtd);
 		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 			if (rtd->i2ssp_renderbytescount == 0)
 				rtd->i2ssp_renderbytescount = bytescount;
diff --git a/sound/soc/amd/acp.h b/sound/soc/amd/acp.h
index 5e25428..3b076c6 100644
--- a/sound/soc/amd/acp.h
+++ b/sound/soc/amd/acp.h
@@ -90,6 +90,8 @@ struct audio_substream_data {
 	u16 destination;
 	u16 dma_dscr_idx_1;
 	u16 dma_dscr_idx_2;
+	u32 byte_cnt_high_reg_offset;
+	u32 byte_cnt_low_reg_offset;
 	uint64_t size;
 	u64 i2ssp_renderbytescount;
 	u64 i2ssp_capturebytescount;
-- 
2.7.4