This patch adds 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@wistron.corp-partner.google.com>
---
 sound/soc/intel/boards/sof_cs42l42.c          | 88 ++++++++++++++++++-
 .../intel/common/soc-acpi-intel-adl-match.c   |  8 ++
 2 files changed, 92 insertions(+), 4 deletions(-)

diff --git a/sound/soc/intel/boards/sof_cs42l42.c b/sound/soc/intel/boards/sof_cs42l42.c
index ce78c18798876..4ac4f51c7c115 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 +480,52 @@ 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;
+
+	/* 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)
+		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)
+		goto devm_err;
+
+	(*id)++;
+
+	return 0;
+
+devm_err:
+	return ret;
+}
+
 static struct snd_soc_dai_link *sof_card_dai_links_create(struct device *dev,
 							  int ssp_codec,
 							  int ssp_amp,
+							  int ssp_bt,
 							  int dmic_be_num,
 							  int hdmi_num)
 {
@@ -522,6 +578,14 @@ static struct snd_soc_dai_link *sof_card_dai_links_create(struct device *dev,
 				goto devm_err;
 			}
 			break;
+		case LINK_BT:
+			ret = create_bt_offload_dai_links(dev, links, cpus, &id, ssp_bt);
+			if (ret < 0) {
+				dev_err(dev, "fail to create bt offload dai links, ret %d\n",
+					ret);
+				goto devm_err;
+			}
+			break;
 		case LINK_NONE:
 			/* caught here if it's not used as terminator in macro */
 		default:
@@ -543,7 +607,7 @@ static int sof_audio_probe(struct platform_device *pdev)
 	struct snd_soc_acpi_mach *mach;
 	struct sof_card_private *ctx;
 	int dmic_be_num, hdmi_num;
-	int ret, ssp_amp, ssp_codec;
+	int ret, ssp_bt, ssp_amp, ssp_codec;
 
 	ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);
 	if (!ctx)
@@ -568,6 +632,9 @@ static int sof_audio_probe(struct platform_device *pdev)
 
 	dev_dbg(&pdev->dev, "sof_cs42l42_quirk = %lx\n", sof_cs42l42_quirk);
 
+	ssp_bt = (sof_cs42l42_quirk & SOF_CS42L42_SSP_BT_MASK) >>
+			SOF_CS42L42_SSP_BT_SHIFT;
+
 	ssp_amp = (sof_cs42l42_quirk & SOF_CS42L42_SSP_AMP_MASK) >>
 			SOF_CS42L42_SSP_AMP_SHIFT;
 
@@ -578,9 +645,11 @@ static int sof_audio_probe(struct platform_device *pdev)
 
 	if (sof_cs42l42_quirk & SOF_SPEAKER_AMP_PRESENT)
 		sof_audio_card_cs42l42.num_links++;
+	if (sof_cs42l42_quirk & SOF_BT_OFFLOAD_PRESENT)
+		sof_audio_card_cs42l42.num_links++;
 
 	dai_links = sof_card_dai_links_create(&pdev->dev, ssp_codec, ssp_amp,
-					      dmic_be_num, hdmi_num);
+					      ssp_bt, dmic_be_num, hdmi_num);
 	if (!dai_links)
 		return -ENOMEM;
 
@@ -621,6 +690,17 @@ static const struct platform_device_id board_ids[] = {
 					SOF_CS42L42_SSP_AMP(1)) |
 					SOF_CS42L42_DAILINK(LINK_HP, LINK_DMIC, LINK_HDMI, LINK_SPK, LINK_NONE),
 	},
+	{
+		.name = "adl_mx98360a_cs4242",
+		.driver_data = (kernel_ulong_t)(SOF_CS42L42_SSP_CODEC(0) |
+					SOF_SPEAKER_AMP_PRESENT |
+					SOF_MAX98360A_SPEAKER_AMP_PRESENT |
+					SOF_CS42L42_SSP_AMP(1) |
+					SOF_CS42L42_NUM_HDMIDEV(4) |
+					SOF_BT_OFFLOAD_PRESENT |
+					SOF_CS42L42_SSP_BT(2)) |
+					SOF_CS42L42_DAILINK(LINK_HP, LINK_DMIC, LINK_HDMI, LINK_SPK, LINK_BT),
+	},
 	{ }
 };
 MODULE_DEVICE_TABLE(platform, board_ids);
diff --git a/sound/soc/intel/common/soc-acpi-intel-adl-match.c b/sound/soc/intel/common/soc-acpi-intel-adl-match.c
index 7c8cd00457f81..3f40519250a90 100644
--- a/sound/soc/intel/common/soc-acpi-intel-adl-match.c
+++ b/sound/soc/intel/common/soc-acpi-intel-adl-match.c
@@ -384,6 +384,14 @@ struct snd_soc_acpi_mach snd_soc_acpi_intel_adl_machines[] = {
 		.sof_fw_filename = "sof-adl.ri",
 		.sof_tplg_filename = "sof-adl-cs35l41.tplg",
 	},
+	{
+		.id = "10134242",
+		.drv_name = "adl_mx98360a_cs4242",
+		.machine_quirk = snd_soc_acpi_codec_list,
+		.quirk_data = &adl_max98360a_amp,
+		.sof_fw_filename = "sof-adl.ri",
+		.sof_tplg_filename = "sof-adl-max98360a-rt5682.tplg",
+	},
 	{},
 };
 EXPORT_SYMBOL_GPL(snd_soc_acpi_intel_adl_machines);
-- 
2.31.0

On 2022-05-04 2:24 PM, Terry Chen wrote:
> This patch adds 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.


Title's length seems off. Please shorten it a bit. Commit message 
formatting (line width) is not cohevise across the lines either.

Another suggestion: skip redundant bits at the front e.g.: s/This patch 
adds/Add/. When adding new code (new functionality), it's good to 
plainly state: "To be able to do X we add capability Y".
The last sentence in your message is a side note. It's good that you're 
being transparent here, my only advice is that you add a new line before 
such notes as these are not the main dish here, really.

Title suggest you're doing two things here - adding support for some ADL 
configuration (1) and BT audio offload (2). Recommendation is to 
splitting non-atomic changes so each patch in the series answers single 
problem.

> Signed-off-by: Terry Chen <terry_chen@wistron.corp-partner.google.com>
> ---
>   sound/soc/intel/boards/sof_cs42l42.c          | 88 ++++++++++++++++++-
>   .../intel/common/soc-acpi-intel-adl-match.c   |  8 ++
>   2 files changed, 92 insertions(+), 4 deletions(-)
> 

...

> @@ -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",
> +	}
> +};

Isn't there some SND_SOC_DAILINK_DEF() macro for that already?

>   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 +480,52 @@ 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;

Looks like there is no need for 'ret' variable here.

> +
> +	/* 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);

Current limit is 100.

> +	if (!links[*id].name)
> +		goto devm_err;

This 'goto' statement seems redundant. I might be missing something but 
returning -ENOMEM should suffice. Label 'devm_err' does not do anything 
special anyway.

> +
> +	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);

Ditto - limit 100. Applies to every single occurence below too.

> +	if (!links[*id].cpus->dai_name)
> +		goto devm_err;
> +
> +	(*id)++;

Are the parenthesis needed? Should be save to drop them.

> +
> +	return 0;
> +
> +devm_err:
> +	return ret;

Once 'ret/devm_err' situation is clarified, this block can be dropped.

> +}