linux-kernel - Re: [PATCH 04/11] ASoC: amd: removed separate byte count variables for playback and capture

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Date:   Mon, 30 Apr 2018 12:55:43 +0530
From:   "Mukunda,Vijendar" <vijendar.mukunda@....com>
To:     Daniel Kurtz <djkurtz@...omium.org>
Cc:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>, perex@...ex.cz,
        tiwai@...e.com, alexander.deucher@....com, jclinton@...omium.org,
        Akshu Agrawal <akshu.agrawal@....com>,
        Guenter Roeck <linux@...ck-us.net>, pombredanne@...b.com,
        kstewart@...uxfoundation.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        alsa-devel@...a-project.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 04/11] ASoC: amd: removed separate byte count variables
 for playback and capture



On Monday 30 April 2018 03:11 AM, Daniel Kurtz wrote:
> Hi Vijendar,
> 
> On Thu, Apr 26, 2018 at 5:15 AM Vijendar Mukunda <Vijendar.Mukunda@....com>
> wrote:
> 
>> Removed separate byte count variables for playback and capture.
> 
>> Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@....com>
> 
> Reviewed-by: Daniel Kurtz <djkurtz@...omium.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;

we will fix it and will share fresh patch.
> 
>>           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