linux-kernel - Re: [v6] FROMLIST: ASoC: Intel: sof_cs42l42: adding support for ADL configuration and BT offload audio

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Date:   Tue, 17 May 2022 21:02:14 -0500
From:   Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
To:     Terry Chen <terry_chen@...tron.corp-partner.google.com>,
        alsa-devel@...a-project.org
Cc:     cezary.rojewski@...el.com, liam.r.girdwood@...ux.intel.com,
        yang.jie@...ux.intel.com, broonie@...nel.org, perex@...ex.cz,
        tiwai@...e.com, brent.lu@...el.com, cujomalainey@...omium.org,
        seanpaul@...omium.org, casey.g.bowman@...el.com,
        mark_hsieh@...tron.corp-partner.google.com,
        vamshi.krishna.gopal@...el.com, mac.chiang@...el.com,
        kai.vehmanen@...ux.intel.com, linux-kernel@...r.kernel.org
Subject: Re: [v6] FROMLIST: ASoC: Intel: sof_cs42l42: adding support for ADL
 configuration and BT offload audio



On 5/17/22 20:31, Terry Chen wrote:
> To be able to do  driver data for adl_mx98360a_cs4242 which supports
> two max98360a speaker amplifiers on SSP1 and cs42l42 headphone codec
> on SSP0 running on ADL platform. Also add the capability to machine driver
> of creating DAI Link for BT offload. Although BT offload always uses SSP2
> port but we reserve the flexibility to assign the port number in macro.
> 
> Signed-off-by: Terry Chen <terry_chen@...tron.corp-partner.google.com>
> (am from https://patchwork.kernel.org/patch/12845884/)
> (also found at https://lore.kernel.org/r/20220511075522.1764114-1-terry_chen@wistron.corp-partner.google.com)

not sure what this is about, what's the point of adding information on
the v5 in the v6 patch?

> 
> ---
>  sound/soc/intel/boards/sof_cs42l42.c          | 92 ++++++++++++++++++-
>  .../intel/common/soc-acpi-intel-adl-match.c   |  7 ++
>  2 files changed, 95 insertions(+), 4 deletions(-)
> 
> diff --git a/sound/soc/intel/boards/sof_cs42l42.c b/sound/soc/intel/boards/sof_cs42l42.c
> index ce78c18798876..2efffc7933479 100644
> --- a/sound/soc/intel/boards/sof_cs42l42.c
> +++ b/sound/soc/intel/boards/sof_cs42l42.c
> @@ -41,8 +41,13 @@
>  #define SOF_CS42L42_DAILINK_MASK		(GENMASK(24, 10))
>  #define SOF_CS42L42_DAILINK(link1, link2, link3, link4, link5) \
>  	((((link1) | ((link2) << 3) | ((link3) << 6) | ((link4) << 9) | ((link5) << 12)) << SOF_CS42L42_DAILINK_SHIFT) & SOF_CS42L42_DAILINK_MASK)
> -#define SOF_MAX98357A_SPEAKER_AMP_PRESENT	BIT(25)
> -#define SOF_MAX98360A_SPEAKER_AMP_PRESENT	BIT(26)
> +#define SOF_BT_OFFLOAD_PRESENT			BIT(25)
> +#define SOF_CS42L42_SSP_BT_SHIFT		26
> +#define SOF_CS42L42_SSP_BT_MASK			(GENMASK(28, 26))
> +#define SOF_CS42L42_SSP_BT(quirk)	\
> +	(((quirk) << SOF_CS42L42_SSP_BT_SHIFT) & SOF_CS42L42_SSP_BT_MASK)
> +#define SOF_MAX98357A_SPEAKER_AMP_PRESENT	BIT(29)
> +#define SOF_MAX98360A_SPEAKER_AMP_PRESENT	BIT(30)
>  
>  enum {
>  	LINK_NONE = 0,
> @@ -50,6 +55,7 @@ enum {
>  	LINK_SPK = 2,
>  	LINK_DMIC = 3,
>  	LINK_HDMI = 4,
> +	LINK_BT = 5,
>  };
>  
>  /* Default: SSP2 */
> @@ -278,6 +284,13 @@ static struct snd_soc_dai_link_component dmic_component[] = {
>  	}
>  };
>  
> +static struct snd_soc_dai_link_component dummy_component[] = {
> +	{
> +		.name = "snd-soc-dummy",
> +		.dai_name = "snd-soc-dummy-dai",
> +	}
> +};
> +
>  static int create_spk_amp_dai_links(struct device *dev,
>  				    struct snd_soc_dai_link *links,
>  				    struct snd_soc_dai_link_component *cpus,
> @@ -467,9 +480,56 @@ static int create_hdmi_dai_links(struct device *dev,
>  	return -ENOMEM;
>  }
>  
> +static int create_bt_offload_dai_links(struct device *dev,
> +				       struct snd_soc_dai_link *links,
> +				       struct snd_soc_dai_link_component *cpus,
> +				       int *id, int ssp_bt)
> +{
> +	int ret = 0;

either you remove this useless init...

> +
> +	/* bt offload */
> +	if (!(sof_cs42l42_quirk & SOF_BT_OFFLOAD_PRESENT))
> +		return 0;
> +
> +	links[*id].name = devm_kasprintf(dev, GFP_KERNEL, "SSP%d-BT",
> +					 ssp_bt);
> +	if (!links[*id].name) {
> +		ret = -ENOMEM;
> +		goto devm_err;
> +	}
> +
> +	links[*id].id = *id;
> +	links[*id].codecs = dummy_component;
> +	links[*id].num_codecs = ARRAY_SIZE(dummy_component);
> +	links[*id].platforms = platform_component;
> +	links[*id].num_platforms = ARRAY_SIZE(platform_component);
> +
> +	links[*id].dpcm_playback = 1;
> +	links[*id].dpcm_capture = 1;
> +	links[*id].no_pcm = 1;
> +	links[*id].cpus = &cpus[*id];
> +	links[*id].num_cpus = 1;
> +
> +	links[*id].cpus->dai_name = devm_kasprintf(dev, GFP_KERNEL,
> +						   "SSP%d Pin",
> +						   ssp_bt);
> +	if (!links[*id].cpus->dai_name) {
> +		ret = -ENOMEM;
> +		goto devm_err;
> +	}
> +
> +	(*id)++;
> +
> +	return 0;

... or you remove the return 0;

pick one.

> +
> +devm_err:
> +	return ret;
> +}
> +

>  	},
> +	{
> +		.id = "10134242",
> +		.drv_name = "adl_mx98360a_cs4242",
> +		.machine_quirk = snd_soc_acpi_codec_list,
> +		.quirk_data = &adl_max98360a_amp,
> +		.sof_tplg_filename = "sof-adl-max98360a-rt5682.tplg",

No, I've told this before in previous reviews: do not use a topology
name that was designed for a different platform, this is not
maintainable. If the topologies happen to be the same, either generate
them twice or use a symlink.