[alsa-devel] [PATCH v5 2/7] ASoC: tegra: Allow 24bit and 32bit samples

[Ben Dooks]

On 20/12/2019 11:30, Jon Hunter wrote:
> 
> On 25/11/2019 17:28, Dmitry Osipenko wrote:
>> 25.11.2019 20:22, Dmitry Osipenko пишет:
>>> 25.11.2019 13:37, Ben Dooks пишет:
>>>> On 23/11/2019 21:09, Dmitry Osipenko wrote:
>>>>> 18.10.2019 18:48, Ben Dooks пишет:
>>>>>> From: Edward Cragg <edward.cragg at codethink.co.uk>
>>>>>>
>>>>>> The tegra3 audio can support 24 and 32 bit sample sizes so add the
>>>>>> option to the tegra30_i2s_hw_params to configure the S24_LE or S32_LE
>>>>>> formats when requested.
>>>>>>
>>>>>> Signed-off-by: Edward Cragg <edward.cragg at codethink.co.uk>
>>>>>> [ben.dooks at codethink.co.uk: fixup merge of 24 and 32bit]
>>>>>> [ben.dooks at codethink.co.uk: add pm calls around ytdm config]
>>>>>> [ben.dooks at codethink.co.uk: drop debug printing to dev_dbg]
>>>>>> Signed-off-by: Ben Dooks <ben.dooks at codethink.co.uk>
>>>>>> ---
>>>>>> squash 5aeca5a055fd ASoC: tegra: i2s: pm_runtime_get_sync() is needed
>>>>>> in tdm code
>>>>>>
>>>>>> ASoC: tegra: i2s: pm_runtime_get_sync() is needed in tdm code
>>>>>> ---
>>>>>>    sound/soc/tegra/tegra30_i2s.c | 25 ++++++++++++++++++++-----
>>>>>>    1 file changed, 20 insertions(+), 5 deletions(-)
>>>>>>
>>>>>> diff --git a/sound/soc/tegra/tegra30_i2s.c
>>>>>> b/sound/soc/tegra/tegra30_i2s.c
>>>>>> index 73f0dddeaef3..063f34c882af 100644
>>>>>> --- a/sound/soc/tegra/tegra30_i2s.c
>>>>>> +++ b/sound/soc/tegra/tegra30_i2s.c
>>>>>> @@ -127,7 +127,7 @@ static int tegra30_i2s_hw_params(struct
>>>>>> snd_pcm_substream *substream,
>>>>>>        struct device *dev = dai->dev;
>>>>>>        struct tegra30_i2s *i2s = snd_soc_dai_get_drvdata(dai);
>>>>>>        unsigned int mask, val, reg;
>>>>>> -    int ret, sample_size, srate, i2sclock, bitcnt;
>>>>>> +    int ret, sample_size, srate, i2sclock, bitcnt, audio_bits;
>>>>>>        struct tegra30_ahub_cif_conf cif_conf;
>>>>>>          if (params_channels(params) != 2)
>>>>>> @@ -137,8 +137,19 @@ static int tegra30_i2s_hw_params(struct
>>>>>> snd_pcm_substream *substream,
>>>>>>        switch (params_format(params)) {
>>>>>>        case SNDRV_PCM_FORMAT_S16_LE:
>>>>>>            val = TEGRA30_I2S_CTRL_BIT_SIZE_16;
>>>>>> +        audio_bits = TEGRA30_AUDIOCIF_BITS_16;
>>>>>>            sample_size = 16;
>>>>>>            break;
>>>>>> +    case SNDRV_PCM_FORMAT_S24_LE:
>>>>>> +        val = TEGRA30_I2S_CTRL_BIT_SIZE_24;
>>>>>> +        audio_bits = TEGRA30_AUDIOCIF_BITS_24;
>>>>>> +        sample_size = 24;
>>>>>> +        break;
>>>>>> +    case SNDRV_PCM_FORMAT_S32_LE:
>>>>>> +        val = TEGRA30_I2S_CTRL_BIT_SIZE_32;
>>>>>> +        audio_bits = TEGRA30_AUDIOCIF_BITS_32;
>>>>>> +        sample_size = 32;
>>>>>> +        break;
>>>>>>        default:
>>>>>>            return -EINVAL;
>>>>>>        }
>>>>>> @@ -170,8 +181,8 @@ static int tegra30_i2s_hw_params(struct
>>>>>> snd_pcm_substream *substream,
>>>>>>        cif_conf.threshold = 0;
>>>>>>        cif_conf.audio_channels = 2;
>>>>>>        cif_conf.client_channels = 2;
>>>>>> -    cif_conf.audio_bits = TEGRA30_AUDIOCIF_BITS_16;
>>>>>> -    cif_conf.client_bits = TEGRA30_AUDIOCIF_BITS_16;
>>>>>> +    cif_conf.audio_bits = audio_bits;
>>>>>> +    cif_conf.client_bits = audio_bits;
>>>>>>        cif_conf.expand = 0;
>>>>>>        cif_conf.stereo_conv = 0;
>>>>>>        cif_conf.replicate = 0;
>>>>>> @@ -306,14 +317,18 @@ static const struct snd_soc_dai_driver
>>>>>> tegra30_i2s_dai_template = {
>>>>>>            .channels_min = 2,
>>>>>>            .channels_max = 2,
>>>>>>            .rates = SNDRV_PCM_RATE_8000_96000,
>>>>>> -        .formats = SNDRV_PCM_FMTBIT_S16_LE,
>>>>>> +        .formats = SNDRV_PCM_FMTBIT_S32_LE |
>>>>>> +               SNDRV_PCM_FMTBIT_S24_LE |
>>>>>> +               SNDRV_PCM_FMTBIT_S16_LE,
>>>>>>        },
>>>>>>        .capture = {
>>>>>>            .stream_name = "Capture",
>>>>>>            .channels_min = 2,
>>>>>>            .channels_max = 2,
>>>>>>            .rates = SNDRV_PCM_RATE_8000_96000,
>>>>>> -        .formats = SNDRV_PCM_FMTBIT_S16_LE,
>>>>>> +        .formats = SNDRV_PCM_FMTBIT_S32_LE |
>>>>>> +               SNDRV_PCM_FMTBIT_S24_LE |
>>>>>> +               SNDRV_PCM_FMTBIT_S16_LE,
>>>>>>        },
>>>>>>        .ops = &tegra30_i2s_dai_ops,
>>>>>>        .symmetric_rates = 1,
>>>>>>
>>>>>
>>>>> Hello,
>>>>>
>>>>> This patch breaks audio on Tegra30. I don't see errors anywhere, but
>>>>> there is no audio and reverting this patch helps. Please fix it.
>>>>
>>>> What is the failure mode? I can try and take a look at this some time
>>>> this week, but I am not sure if I have any boards with an actual useful
>>>> audio output?
>>>
>>> The failure mode is that there no sound. I also noticed that video
>>> playback stutters a lot if movie file has audio track, seems something
>>> times out during of the audio playback. For now I don't have any more info.
>>>
>>
>> Oh, I didn't say how to reproduce it.. for example simply playing
>> big_buck_bunny_720p_h264.mov in MPV has the audio problem.
>>
>> https://download.blender.org/peach/bigbuckbunny_movies/big_buck_bunny_720p_h264.mov
> 
> Given that the audio drivers uses regmap, it could be good to dump the
> I2S/AHUB registers while the clip if playing with and without this patch
> to see the differences. I am curious if the audio is now being played as
> 24 or 32-bit instead of 16-bit now these are available.
> 
> You could also dump the hw_params to see the format while playing as
> well ...
> 
> $ /proc/asound/<scard-name>/pcm0p/sub0/hw_params

I suppose it is also possible that the codec isn't properly doing >16
bits and the fact we now offer 24 and 32 could be an issue. I've not
got anything with an audio output on it that would be easy to test.


-- 
Ben Dooks				http://www.codethink.co.uk/
Senior Engineer				Codethink - Providing Genius

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