1 files changed, 392 insertions, 0 deletions

diff --git a/sound/soc/codecs/hda.c b/sound/soc/codecs/hda.c
new file mode 100644
index 000000000..61e8e9be6
--- /dev/null
+++ b/sound/soc/codecs/hda.c
@@ -0,0 +1,392 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Copyright(c) 2021-2022 Intel Corporation. All rights reserved.
+//
+// Author: Cezary Rojewski <cezary.rojewski@intel.com>
+//
+
+#include <linux/module.h>
+#include <linux/pm_runtime.h>
+#include <sound/soc.h>
+#include <sound/hdaudio_ext.h>
+#include <sound/hda_i915.h>
+#include <sound/hda_codec.h>
+#include "hda.h"
+
+static int hda_codec_create_dais(struct hda_codec *codec, int pcm_count,
+				 struct snd_soc_dai_driver **drivers)
+{
+	struct device *dev = &codec->core.dev;
+	struct snd_soc_dai_driver *drvs;
+	struct hda_pcm *pcm;
+	int i;
+
+	drvs = devm_kcalloc(dev, pcm_count, sizeof(*drvs), GFP_KERNEL);
+	if (!drvs)
+		return -ENOMEM;
+
+	pcm = list_first_entry(&codec->pcm_list_head, struct hda_pcm, list);
+
+	for (i = 0; i < pcm_count; i++, pcm = list_next_entry(pcm, list)) {
+		struct snd_soc_pcm_stream *stream;
+		int dir;
+
+		dev_info(dev, "creating for %s %d\n", pcm->name, i);
+		drvs[i].id = i;
+		drvs[i].name = pcm->name;
+		drvs[i].ops = &snd_soc_hda_codec_dai_ops;
+
+		dir = SNDRV_PCM_STREAM_PLAYBACK;
+		stream = &drvs[i].playback;
+		if (!pcm->stream[dir].substreams) {
+			dev_info(dev, "skipping playback dai for %s\n", pcm->name);
+			goto capture_dais;
+		}
+
+		stream->stream_name =
+			devm_kasprintf(dev, GFP_KERNEL, "%s %s", pcm->name,
+				       snd_pcm_direction_name(dir));
+		if (!stream->stream_name)
+			return -ENOMEM;
+		stream->channels_min = pcm->stream[dir].channels_min;
+		stream->channels_max = pcm->stream[dir].channels_max;
+		stream->rates = pcm->stream[dir].rates;
+		stream->formats = pcm->stream[dir].formats;
+		stream->sig_bits = pcm->stream[dir].maxbps;
+
+capture_dais:
+		dir = SNDRV_PCM_STREAM_CAPTURE;
+		stream = &drvs[i].capture;
+		if (!pcm->stream[dir].substreams) {
+			dev_info(dev, "skipping capture dai for %s\n", pcm->name);
+			continue;
+		}
+
+		stream->stream_name =
+			devm_kasprintf(dev, GFP_KERNEL, "%s %s", pcm->name,
+				       snd_pcm_direction_name(dir));
+		if (!stream->stream_name)
+			return -ENOMEM;
+		stream->channels_min = pcm->stream[dir].channels_min;
+		stream->channels_max = pcm->stream[dir].channels_max;
+		stream->rates = pcm->stream[dir].rates;
+		stream->formats = pcm->stream[dir].formats;
+		stream->sig_bits = pcm->stream[dir].maxbps;
+	}
+
+	*drivers = drvs;
+	return 0;
+}
+
+static int hda_codec_register_dais(struct hda_codec *codec, struct snd_soc_component *component)
+{
+	struct snd_soc_dai_driver *drvs = NULL;
+	struct snd_soc_dapm_context *dapm;
+	struct hda_pcm *pcm;
+	int ret, pcm_count = 0;
+
+	if (list_empty(&codec->pcm_list_head))
+		return -EINVAL;
+	list_for_each_entry(pcm, &codec->pcm_list_head, list)
+		pcm_count++;
+
+	ret = hda_codec_create_dais(codec, pcm_count, &drvs);
+	if (ret < 0)
+		return ret;
+
+	dapm = snd_soc_component_get_dapm(component);
+
+	list_for_each_entry(pcm, &codec->pcm_list_head, list) {
+		struct snd_soc_dai *dai;
+
+		dai = snd_soc_register_dai(component, drvs, false);
+		if (!dai) {
+			dev_err(component->dev, "register dai for %s failed\n", pcm->name);
+			return -EINVAL;
+		}
+
+		ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
+		if (ret < 0) {
+			dev_err(component->dev, "create widgets failed: %d\n", ret);
+			snd_soc_unregister_dai(dai);
+			return ret;
+		}
+
+		snd_soc_dai_init_dma_data(dai, &pcm->stream[0], &pcm->stream[1]);
+		drvs++;
+	}
+
+	return 0;
+}
+
+static void hda_codec_unregister_dais(struct hda_codec *codec,
+				      struct snd_soc_component *component)
+{
+	struct snd_soc_dai *dai, *save;
+	struct hda_pcm *pcm;
+
+	for_each_component_dais_safe(component, dai, save) {
+		list_for_each_entry(pcm, &codec->pcm_list_head, list) {
+			if (strcmp(dai->driver->name, pcm->name))
+				continue;
+
+			if (dai->playback_widget)
+				snd_soc_dapm_free_widget(dai->playback_widget);
+			if (dai->capture_widget)
+				snd_soc_dapm_free_widget(dai->capture_widget);
+			snd_soc_unregister_dai(dai);
+			break;
+		}
+	}
+}
+
+int hda_codec_probe_complete(struct hda_codec *codec)
+{
+	struct hdac_device *hdev = &codec->core;
+	struct hdac_bus *bus = hdev->bus;
+	int ret;
+
+	ret = snd_hda_codec_build_controls(codec);
+	if (ret < 0) {
+		dev_err(&hdev->dev, "unable to create controls %d\n", ret);
+		goto out;
+	}
+
+	/* Bus suspended codecs as it does not manage their pm */
+	pm_runtime_set_active(&hdev->dev);
+	/* rpm was forbidden in snd_hda_codec_device_new() */
+	snd_hda_codec_set_power_save(codec, 2000);
+	snd_hda_codec_register(codec);
+out:
+	/* Complement pm_runtime_get_sync(bus) in probe */
+	pm_runtime_mark_last_busy(bus->dev);
+	pm_runtime_put_autosuspend(bus->dev);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(hda_codec_probe_complete);
+
+/* Expects codec with usage_count=1 and status=suspended */
+static int hda_codec_probe(struct snd_soc_component *component)
+{
+	struct hda_codec *codec = dev_to_hda_codec(component->dev);
+	struct hdac_device *hdev = &codec->core;
+	struct hdac_bus *bus = hdev->bus;
+	struct hdac_ext_link *hlink;
+	hda_codec_patch_t patch;
+	int ret;
+
+#ifdef CONFIG_PM
+	WARN_ON(atomic_read(&hdev->dev.power.usage_count) != 1 ||
+		!pm_runtime_status_suspended(&hdev->dev));
+#endif
+
+	hlink = snd_hdac_ext_bus_link_at(bus, hdev->addr);
+	if (!hlink) {
+		dev_err(&hdev->dev, "hdac link not found\n");
+		return -EIO;
+	}
+
+	pm_runtime_get_sync(bus->dev);
+	if (hda_codec_is_display(codec))
+		snd_hdac_display_power(bus, hdev->addr, true);
+	snd_hdac_ext_bus_link_get(bus, hlink);
+
+	ret = snd_hda_codec_device_new(codec->bus, component->card->snd_card, hdev->addr, codec,
+				       false);
+	if (ret < 0) {
+		dev_err(&hdev->dev, "create hda codec failed: %d\n", ret);
+		goto device_new_err;
+	}
+
+	ret = snd_hda_codec_set_name(codec, codec->preset->name);
+	if (ret < 0) {
+		dev_err(&hdev->dev, "name failed %s\n", codec->preset->name);
+		goto err;
+	}
+
+	ret = snd_hdac_regmap_init(&codec->core);
+	if (ret < 0) {
+		dev_err(&hdev->dev, "regmap init failed\n");
+		goto err;
+	}
+
+	patch = (hda_codec_patch_t)codec->preset->driver_data;
+	if (!patch) {
+		dev_err(&hdev->dev, "no patch specified?\n");
+		ret = -EINVAL;
+		goto err;
+	}
+
+	ret = patch(codec);
+	if (ret < 0) {
+		dev_err(&hdev->dev, "patch failed %d\n", ret);
+		goto err;
+	}
+
+	ret = snd_hda_codec_parse_pcms(codec);
+	if (ret < 0) {
+		dev_err(&hdev->dev, "unable to map pcms to dai %d\n", ret);
+		goto parse_pcms_err;
+	}
+
+	ret = hda_codec_register_dais(codec, component);
+	if (ret < 0) {
+		dev_err(&hdev->dev, "update dais failed: %d\n", ret);
+		goto parse_pcms_err;
+	}
+
+	if (!hda_codec_is_display(codec)) {
+		ret = hda_codec_probe_complete(codec);
+		if (ret < 0)
+			goto complete_err;
+	}
+
+	codec->core.lazy_cache = true;
+
+	return 0;
+
+complete_err:
+	hda_codec_unregister_dais(codec, component);
+parse_pcms_err:
+	if (codec->patch_ops.free)
+		codec->patch_ops.free(codec);
+err:
+	snd_hda_codec_cleanup_for_unbind(codec);
+device_new_err:
+	if (hda_codec_is_display(codec))
+		snd_hdac_display_power(bus, hdev->addr, false);
+
+	snd_hdac_ext_bus_link_put(bus, hlink);
+
+	pm_runtime_mark_last_busy(bus->dev);
+	pm_runtime_put_autosuspend(bus->dev);
+	return ret;
+}
+
+/* Leaves codec with usage_count=1 and status=suspended */
+static void hda_codec_remove(struct snd_soc_component *component)
+{
+	struct hda_codec *codec = dev_to_hda_codec(component->dev);
+	struct hdac_device *hdev = &codec->core;
+	struct hdac_bus *bus = hdev->bus;
+	struct hdac_ext_link *hlink;
+	bool was_registered = codec->core.registered;
+
+	/* Don't allow any more runtime suspends */
+	pm_runtime_forbid(&hdev->dev);
+
+	hda_codec_unregister_dais(codec, component);
+
+	if (codec->patch_ops.free)
+		codec->patch_ops.free(codec);
+
+	snd_hda_codec_cleanup_for_unbind(codec);
+	pm_runtime_put_noidle(&hdev->dev);
+	/* snd_hdac_device_exit() is only called on bus remove */
+	pm_runtime_set_suspended(&hdev->dev);
+
+	if (hda_codec_is_display(codec))
+		snd_hdac_display_power(bus, hdev->addr, false);
+
+	hlink = snd_hdac_ext_bus_link_at(bus, hdev->addr);
+	if (hlink)
+		snd_hdac_ext_bus_link_put(bus, hlink);
+	/*
+	 * HDMI card's hda_codec_probe_complete() (see late_probe()) may
+	 * not be called due to early error, leaving bus uc unbalanced
+	 */
+	if (!was_registered) {
+		pm_runtime_mark_last_busy(bus->dev);
+		pm_runtime_put_autosuspend(bus->dev);
+	}
+
+#ifdef CONFIG_PM
+	WARN_ON(atomic_read(&hdev->dev.power.usage_count) != 1 ||
+		!pm_runtime_status_suspended(&hdev->dev));
+#endif
+}
+
+static const struct snd_soc_dapm_route hda_dapm_routes[] = {
+	{"AIF1TX", NULL, "Codec Input Pin1"},
+	{"AIF2TX", NULL, "Codec Input Pin2"},
+	{"AIF3TX", NULL, "Codec Input Pin3"},
+
+	{"Codec Output Pin1", NULL, "AIF1RX"},
+	{"Codec Output Pin2", NULL, "AIF2RX"},
+	{"Codec Output Pin3", NULL, "AIF3RX"},
+};
+
+static const struct snd_soc_dapm_widget hda_dapm_widgets[] = {
+	/* Audio Interface */
+	SND_SOC_DAPM_AIF_IN("AIF1RX", "Analog Codec Playback", 0, SND_SOC_NOPM, 0, 0),
+	SND_SOC_DAPM_AIF_IN("AIF2RX", "Digital Codec Playback", 0, SND_SOC_NOPM, 0, 0),
+	SND_SOC_DAPM_AIF_IN("AIF3RX", "Alt Analog Codec Playback", 0, SND_SOC_NOPM, 0, 0),
+	SND_SOC_DAPM_AIF_OUT("AIF1TX", "Analog Codec Capture", 0, SND_SOC_NOPM, 0, 0),
+	SND_SOC_DAPM_AIF_OUT("AIF2TX", "Digital Codec Capture", 0, SND_SOC_NOPM, 0, 0),
+	SND_SOC_DAPM_AIF_OUT("AIF3TX", "Alt Analog Codec Capture", 0, SND_SOC_NOPM, 0, 0),
+
+	/* Input Pins */
+	SND_SOC_DAPM_INPUT("Codec Input Pin1"),
+	SND_SOC_DAPM_INPUT("Codec Input Pin2"),
+	SND_SOC_DAPM_INPUT("Codec Input Pin3"),
+
+	/* Output Pins */
+	SND_SOC_DAPM_OUTPUT("Codec Output Pin1"),
+	SND_SOC_DAPM_OUTPUT("Codec Output Pin2"),
+	SND_SOC_DAPM_OUTPUT("Codec Output Pin3"),
+};
+
+static struct snd_soc_dai_driver card_binder_dai = {
+	.id = -1,
+	.name = "codec-probing-DAI",
+};
+
+static int hda_hdev_attach(struct hdac_device *hdev)
+{
+	struct hda_codec *codec = dev_to_hda_codec(&hdev->dev);
+	struct snd_soc_component_driver *comp_drv;
+
+	comp_drv = devm_kzalloc(&hdev->dev, sizeof(*comp_drv), GFP_KERNEL);
+	if (!comp_drv)
+		return -ENOMEM;
+
+	/*
+	 * It's save to rely on dev_name() rather than a copy as component
+	 * driver's lifetime is directly tied to hda codec one
+	 */
+	comp_drv->name = dev_name(&hdev->dev);
+	comp_drv->probe = hda_codec_probe;
+	comp_drv->remove = hda_codec_remove;
+	comp_drv->idle_bias_on = false;
+	if (!hda_codec_is_display(codec)) {
+		comp_drv->dapm_widgets = hda_dapm_widgets;
+		comp_drv->num_dapm_widgets = ARRAY_SIZE(hda_dapm_widgets);
+		comp_drv->dapm_routes = hda_dapm_routes;
+		comp_drv->num_dapm_routes = ARRAY_SIZE(hda_dapm_routes);
+	}
+
+	return snd_soc_register_component(&hdev->dev, comp_drv, &card_binder_dai, 1);
+}
+
+static int hda_hdev_detach(struct hdac_device *hdev)
+{
+	struct hda_codec *codec = dev_to_hda_codec(&hdev->dev);
+
+	if (codec->core.registered)
+		cancel_delayed_work_sync(&codec->jackpoll_work);
+
+	snd_soc_unregister_component(&hdev->dev);
+
+	return 0;
+}
+
+const struct hdac_ext_bus_ops soc_hda_ext_bus_ops = {
+	.hdev_attach = hda_hdev_attach,
+	.hdev_detach = hda_hdev_detach,
+};
+EXPORT_SYMBOL_GPL(soc_hda_ext_bus_ops);
+
+MODULE_DESCRIPTION("HD-Audio codec driver");
+MODULE_AUTHOR("Cezary Rojewski <cezary.rojewski@intel.com>");
+MODULE_LICENSE("GPL");