linux-kernel - Re: [alsa-devel] [PATCH] ASoC: Intel: bytcr_5640.c:Refactored if statement and removed buffer

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Date:   Mon, 6 May 2019 17:43:16 +0200
From:   Hans de Goede <hdegoede@...hat.com>
To:     Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Nariman <narimantos@...il.com>, linux-kernel@...r.kernel.org
Cc:     alsa-devel@...a-project.org, tiwai@...e.com,
        yang.jie@...ux.intel.com, liam.r.girdwood@...ux.intel.com,
        broonie@...nel.org
Subject: Re: [alsa-devel] [PATCH] ASoC: Intel: bytcr_5640.c:Refactored if
 statement and removed buffer

Hi Pierre-Louis,

Nariman and the author authors of these patches are a group of students doing
some kernel work for me and this is a warm-up assignment for them to get used
to the kernel development process.

On 06-05-19 17:21, Pierre-Louis Bossart wrote:
> 
>>   static int byt_rt5640_suspend(struct snd_soc_card *card)
>> @@ -1268,28 +1266,12 @@ static int snd_byt_rt5640_mc_probe(struct platform_device *pdev)
>>       log_quirks(&pdev->dev);
>>       if ((byt_rt5640_quirk & BYT_RT5640_SSP2_AIF2) ||
>> -        (byt_rt5640_quirk & BYT_RT5640_SSP0_AIF2)) {
>> -
>> -        /* fixup codec aif name */
>> -        snprintf(byt_rt5640_codec_aif_name,
>> -            sizeof(byt_rt5640_codec_aif_name),
>> -            "%s", "rt5640-aif2");
>> -
>> -        byt_rt5640_dais[dai_index].codec_dai_name =
>> -            byt_rt5640_codec_aif_name;
>> -    }
>> +        (byt_rt5640_quirk & BYT_RT5640_SSP0_AIF2))
>> +        byt_rt5640_dais[dai_index].codec_dai_name = "rt5640-aif2";
> 
> This is not equivalent, you don't deal with the (byt_rt5640_quirk & BYT_RT5640_SSP2_AIF2) case. The default is SSP_AIF1

I might be mistaken here, but look closer, the original:
	if ((byt_rt5640_quirk & BYT_RT5640_SSP2_AIF2) ||

Line is kept, so the new code block is:

	if ((byt_rt5640_quirk & BYT_RT5640_SSP2_AIF2) ||
	    (byt_rt5640_quirk & BYT_RT5640_SSP0_AIF2))
		byt_rt5640_dais[dai_index].codec_dai_name = "rt5640-aif2";

Which does take the BYT_RT5640_SSP2_AIF2 into account.

>>       if ((byt_rt5640_quirk & BYT_RT5640_SSP0_AIF1) ||
>> -        (byt_rt5640_quirk & BYT_RT5640_SSP0_AIF2)) {
>> -
>> -        /* fixup cpu dai name name */
>> -        snprintf(byt_rt5640_cpu_dai_name,
>> -            sizeof(byt_rt5640_cpu_dai_name),
>> -            "%s", "ssp0-port");
>> -
>> -        byt_rt5640_dais[dai_index].cpu_dai_name =
>> -            byt_rt5640_cpu_dai_name;
>> -    }
>> +        (byt_rt5640_quirk & BYT_RT5640_SSP0_AIF2))
>> +        byt_rt5640_dais[dai_index].cpu_dai_name = "ssp0-port";
> 
> Same here, this is not equivalent. the SSP0_AIF1 case is not handled.
> it's fine to remove the intermediate buffers, but you can't remove support for 2 out of the 4 combinations supported.

Same remark here from me too :)

Regards,

Hans