linux_kernel/sound/soc/intel/boards/skl_hda_dsp_generic.c

// SPDX-License-Identifier: GPL-2.0
// Copyright(c) 2015-18 Intel Corporation.

/*
 * Machine Driver for SKL+ platforms with DSP and iDisp, HDA Codecs
 */

#include <linux/module.h>
#include <linux/platform_device.h>
#include <sound/core.h>
#include <sound/jack.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include "../../codecs/hdac_hdmi.h"
#include "../skylake/skl.h"
#include "skl_hda_dsp_common.h"

static const struct snd_soc_dapm_widget skl_hda_widgets[] = {
	SND_SOC_DAPM_HP("Analog Out", NULL),
	SND_SOC_DAPM_MIC("Analog In", NULL),
	SND_SOC_DAPM_HP("Alt Analog Out", NULL),
	SND_SOC_DAPM_MIC("Alt Analog In", NULL),
	SND_SOC_DAPM_SPK("Digital Out", NULL),
	SND_SOC_DAPM_MIC("Digital In", NULL),
};

static const struct snd_soc_dapm_route skl_hda_map[] = {
	{ "hifi3", NULL, "iDisp3 Tx"},
	{ "iDisp3 Tx", NULL, "iDisp3_out"},
	{ "hifi2", NULL, "iDisp2 Tx"},
	{ "iDisp2 Tx", NULL, "iDisp2_out"},
	{ "hifi1", NULL, "iDisp1 Tx"},
	{ "iDisp1 Tx", NULL, "iDisp1_out"},

	{ "Analog Out", NULL, "Codec Output Pin1" },
	{ "Digital Out", NULL, "Codec Output Pin2" },
	{ "Alt Analog Out", NULL, "Codec Output Pin3" },

	{ "Codec Input Pin1", NULL, "Analog In" },
	{ "Codec Input Pin2", NULL, "Digital In" },
	{ "Codec Input Pin3", NULL, "Alt Analog In" },

	/* CODEC BE connections */
	{ "Analog Codec Playback", NULL, "Analog CPU Playback" },
	{ "Analog CPU Playback", NULL, "codec0_out" },
	{ "Digital Codec Playback", NULL, "Digital CPU Playback" },
	{ "Digital CPU Playback", NULL, "codec1_out" },
	{ "Alt Analog Codec Playback", NULL, "Alt Analog CPU Playback" },
	{ "Alt Analog CPU Playback", NULL, "codec2_out" },

	{ "codec0_in", NULL, "Analog CPU Capture" },
	{ "Analog CPU Capture", NULL, "Analog Codec Capture" },
	{ "codec1_in", NULL, "Digital CPU Capture" },
	{ "Digital CPU Capture", NULL, "Digital Codec Capture" },
	{ "codec2_in", NULL, "Alt Analog CPU Capture" },
	{ "Alt Analog CPU Capture", NULL, "Alt Analog Codec Capture" },
};

static int skl_hda_card_late_probe(struct snd_soc_card *card)
{
	return skl_hda_hdmi_jack_init(card);
}

static int
skl_hda_add_dai_link(struct snd_soc_card *card, struct snd_soc_dai_link *link)
{
	struct skl_hda_private *ctx = snd_soc_card_get_drvdata(card);
	int ret = 0;

	dev_dbg(card->dev, "%s: dai link name - %s\n", __func__, link->name);
	link->platform_name = ctx->platform_name;
	link->nonatomic = 1;

	if (strstr(link->name, "HDMI")) {
		ret = skl_hda_hdmi_add_pcm(card, ctx->pcm_count);

		if (ret < 0)
			return ret;

		ctx->dai_index++;
	}

	ctx->pcm_count++;
	return ret;
}

static struct snd_soc_card hda_soc_card = {
	.name = "skl_hda_card",
	.owner = THIS_MODULE,
	.dai_link = skl_hda_be_dai_links,
	.dapm_widgets = skl_hda_widgets,
	.dapm_routes = skl_hda_map,
	.add_dai_link = skl_hda_add_dai_link,
	.fully_routed = true,
	.late_probe = skl_hda_card_late_probe,
};

#define IDISP_DAI_COUNT		3
/* there are two routes per iDisp output */
#define IDISP_ROUTE_COUNT	(IDISP_DAI_COUNT * 2)
#define IDISP_CODEC_MASK	0x4

static int skl_hda_fill_card_info(struct skl_machine_pdata *pdata)
{
	struct snd_soc_card *card = &hda_soc_card;
	struct snd_soc_dai_link *dai_link;
	u32 codec_count, codec_mask;
	int i, num_links, num_route;

	codec_mask = pdata->codec_mask;
	codec_count = hweight_long(codec_mask);

	if (codec_count == 1 && pdata->codec_mask & IDISP_CODEC_MASK) {
		num_links = IDISP_DAI_COUNT;
		num_route = IDISP_ROUTE_COUNT;
	} else if (codec_count == 2 && codec_mask & IDISP_CODEC_MASK) {
		num_links = ARRAY_SIZE(skl_hda_be_dai_links);
		num_route = ARRAY_SIZE(skl_hda_map),
		card->dapm_widgets = skl_hda_widgets;
		card->num_dapm_widgets = ARRAY_SIZE(skl_hda_widgets);
	} else {
		return -EINVAL;
	}

	card->num_links = num_links;
	card->num_dapm_routes = num_route;

	for_each_card_prelinks(card, i, dai_link)
		dai_link->platform_name = pdata->platform;

	return 0;
}

static int skl_hda_audio_probe(struct platform_device *pdev)
{
	struct skl_machine_pdata *pdata;
	struct skl_hda_private *ctx;
	int ret;

	dev_dbg(&pdev->dev, "%s: entry\n", __func__);

	ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_ATOMIC);
	if (!ctx)
		return -ENOMEM;

	INIT_LIST_HEAD(&ctx->hdmi_pcm_list);

	pdata = dev_get_drvdata(&pdev->dev);
	if (!pdata)
		return -EINVAL;

	ret = skl_hda_fill_card_info(pdata);
	if (ret < 0) {
		dev_err(&pdev->dev, "Unsupported HDAudio/iDisp configuration found\n");
		return ret;
	}

	ctx->pcm_count = hda_soc_card.num_links;
	ctx->dai_index = 1; /* hdmi codec dai name starts from index 1 */
	ctx->platform_name = pdata->platform;

	hda_soc_card.dev = &pdev->dev;
	snd_soc_card_set_drvdata(&hda_soc_card, ctx);

	return devm_snd_soc_register_card(&pdev->dev, &hda_soc_card);
}

static struct platform_driver skl_hda_audio = {
	.probe = skl_hda_audio_probe,
	.driver = {
		.name = "skl_hda_dsp_generic",
		.pm = &snd_soc_pm_ops,
	},
};

module_platform_driver(skl_hda_audio)

/* Module information */
MODULE_DESCRIPTION("SKL/KBL/BXT/APL HDA Generic Machine driver");
MODULE_AUTHOR("Rakesh Ughreja <rakesh.a.ughreja@intel.com>");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:skl_hda_dsp_generic");