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In-Reply-To: <1524741374-13523-4-git-send-email-Vijendar.Mukunda@amd.com>
From:   Daniel Kurtz <djkurtz@chromium.org>
Date:   Sun, 29 Apr 2018 21:41:33 +0000
Message-ID: <CAGS+omA4DNm7HZZUpRBJfhhY-GYGaQRU1KWBb-CTuO7qGwTXCw@mail.gmail.com>
Subject: Re: [PATCH 04/11] ASoC: amd: removed separate byte count variables
 for playback and capture
To:     Vijendar.Mukunda@amd.com
Cc:     Liam Girdwood <lgirdwood@gmail.com>,
        Mark Brown <broonie@kernel.org>, perex@perex.cz,
        tiwai@suse.com, alexander.deucher@amd.com, jclinton@chromium.org,
        Akshu Agrawal <akshu.agrawal@amd.com>,
        Guenter Roeck <linux@roeck-us.net>, pombredanne@nexb.com,
        kstewart@linuxfoundation.org,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org
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Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Hi Vijendar,

On Thu, Apr 26, 2018 at 5:15 AM Vijendar Mukunda <Vijendar.Mukunda@amd.com>
wrote:

> Removed separate byte count variables for playback and capture.

> Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>

Reviewed-by: Daniel Kurtz <djkurtz@chromium.org>

> ---
>   sound/soc/amd/acp-pcm-dma.c | 19 +++++--------------
>   sound/soc/amd/acp.h         |  3 +--
>   2 files changed, 6 insertions(+), 16 deletions(-)

> diff --git a/sound/soc/amd/acp-pcm-dma.c b/sound/soc/amd/acp-pcm-dma.c
> index 019f696..5f34be1 100644
> --- a/sound/soc/amd/acp-pcm-dma.c
> +++ b/sound/soc/amd/acp-pcm-dma.c
> @@ -866,13 +866,8 @@ static snd_pcm_uframes_t acp_dma_pointer(struct
snd_pcm_substream *substream)
>          buffersize = frames_to_bytes(runtime, runtime->buffer_size);
>          bytescount = acp_get_byte_count(rtd);

> -       if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
> -               if (bytescount > rtd->i2ssp_renderbytescount)
> -                       bytescount = bytescount -
rtd->i2ssp_renderbytescount;
> -       } else {
> -               if (bytescount > rtd->i2ssp_capturebytescount)
> -                       bytescount = bytescount -
rtd->i2ssp_capturebytescount;
> -       }
> +       if (bytescount > rtd->bytescount)
> +               bytescount = bytescount - rtd->bytescount;

nit, this could be:
bytescount -= rtd->bytescount;

>          pos = do_div(bytescount, buffersize);
>          return bytes_to_frames(runtime, pos);
>   }
> @@ -921,9 +916,9 @@ static int acp_dma_trigger(struct snd_pcm_substream
*substream, int cmd)
>          case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
>          case SNDRV_PCM_TRIGGER_RESUME:
>                  bytescount = acp_get_byte_count(rtd);
> +               if (rtd->bytescount == 0)
> +                       rtd->bytescount = bytescount;
>                  if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
> -                       if (rtd->i2ssp_renderbytescount == 0)
> -                               rtd->i2ssp_renderbytescount = bytescount;
>                          acp_dma_start(rtd->acp_mmio, rtd->ch1, false);
>                          while (acp_reg_read(rtd->acp_mmio,
mmACP_DMA_CH_STS) &
>                                  BIT(rtd->ch1)) {
> @@ -934,9 +929,6 @@ static int acp_dma_trigger(struct snd_pcm_substream
*substream, int cmd)
>                                  }
>                                  cpu_relax();
>                          }
> -               } else {
> -                       if (rtd->i2ssp_capturebytescount == 0)
> -                               rtd->i2ssp_capturebytescount = bytescount;
>                  }
>                  acp_dma_start(rtd->acp_mmio, rtd->ch2, true);
>                  ret = 0;
> @@ -947,12 +939,11 @@ static int acp_dma_trigger(struct snd_pcm_substream
*substream, int cmd)
>                  if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
>                          acp_dma_stop(rtd->acp_mmio, rtd->ch1);
>                          ret =  acp_dma_stop(rtd->acp_mmio, rtd->ch2);
> -                       rtd->i2ssp_renderbytescount = 0;
>                  } else {
>                          acp_dma_stop(rtd->acp_mmio, rtd->ch2);
>                          ret = acp_dma_stop(rtd->acp_mmio, rtd->ch1);
> -                       rtd->i2ssp_capturebytescount = 0;
>                  }
> +               rtd->bytescount = 0;
>                  break;
>          default:
>                  ret = -EINVAL;
> diff --git a/sound/soc/amd/acp.h b/sound/soc/amd/acp.h
> index 3b076c6..82470bc 100644
> --- a/sound/soc/amd/acp.h
> +++ b/sound/soc/amd/acp.h
> @@ -93,8 +93,7 @@ struct audio_substream_data {
>          u32 byte_cnt_high_reg_offset;
>          u32 byte_cnt_low_reg_offset;
>          uint64_t size;
> -       u64 i2ssp_renderbytescount;
> -       u64 i2ssp_capturebytescount;
> +       u64 bytescount;
>          void __iomem *acp_mmio;
>   };

> --
> 2.7.4