1 files changed, 287 insertions, 0 deletions
diff --git a/sound/soc/sof/intel/hda-codec.c b/sound/soc/sof/intel/hda-codec.c
new file mode 100644
index 000000000..a0dfd7de4
--- /dev/null
+++ b/sound/soc/sof/intel/hda-codec.c
@@ -0,0 +1,287 @@
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
+//
+// This file is provided under a dual BSD/GPLv2 license.  When using or
+// redistributing this file, you may do so under either license.
+//
+// Copyright(c) 2018 Intel Corporation. All rights reserved.
+//
+// Authors: Keyon Jie <yang.jie@linux.intel.com>
+//
+
+#include <linux/module.h>
+#include <sound/hdaudio_ext.h>
+#include <sound/hda_register.h>
+#include <sound/hda_codec.h>
+#include <sound/hda_i915.h>
+#include <sound/sof.h>
+#include "../ops.h"
+#include "hda.h"
+#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC)
+#include "../../codecs/hdac_hda.h"
+#endif /* CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC */
+
+#define CODEC_PROBE_RETRIES	3
+
+#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC)
+#define IDISP_VID_INTEL	0x80860000
+
+/* load the legacy HDA codec driver */
+static int request_codec_module(struct hda_codec *codec)
+{
+#ifdef MODULE
+	char alias[MODULE_NAME_LEN];
+	const char *mod = NULL;
+
+	switch (codec->probe_id) {
+	case HDA_CODEC_ID_GENERIC:
+#if IS_MODULE(CONFIG_SND_HDA_GENERIC)
+		mod = "snd-hda-codec-generic";
+#endif
+		break;
+	default:
+		snd_hdac_codec_modalias(&codec->core, alias, sizeof(alias));
+		mod = alias;
+		break;
+	}
+
+	if (mod) {
+		dev_dbg(&codec->core.dev, "loading codec module: %s\n", mod);
+		request_module(mod);
+	}
+#endif /* MODULE */
+	return device_attach(hda_codec_dev(codec));
+}
+
+static int hda_codec_load_module(struct hda_codec *codec)
+{
+	int ret;
+
+	ret = snd_hdac_device_register(&codec->core);
+	if (ret) {
+		dev_err(&codec->core.dev, "failed to register hdac device\n");
+		put_device(&codec->core.dev);
+		return ret;
+	}
+
+	ret = request_codec_module(codec);
+	if (ret <= 0) {
+		codec->probe_id = HDA_CODEC_ID_GENERIC;
+		ret = request_codec_module(codec);
+	}
+
+	return ret;
+}
+
+/* enable controller wake up event for all codecs with jack connectors */
+void hda_codec_jack_wake_enable(struct snd_sof_dev *sdev, bool enable)
+{
+	struct hda_bus *hbus = sof_to_hbus(sdev);
+	struct hdac_bus *bus = sof_to_bus(sdev);
+	struct hda_codec *codec;
+	unsigned int mask = 0;
+
+	if (enable) {
+		list_for_each_codec(codec, hbus)
+			if (codec->jacktbl.used)
+				mask |= BIT(codec->core.addr);
+	}
+
+	snd_hdac_chip_updatew(bus, WAKEEN, STATESTS_INT_MASK, mask);
+}
+
+/* check jack status after resuming from suspend mode */
+void hda_codec_jack_check(struct snd_sof_dev *sdev)
+{
+	struct hda_bus *hbus = sof_to_hbus(sdev);
+	struct hda_codec *codec;
+
+	list_for_each_codec(codec, hbus)
+		/*
+		 * Wake up all jack-detecting codecs regardless whether an event
+		 * has been recorded in STATESTS
+		 */
+		if (codec->jacktbl.used)
+			pm_request_resume(&codec->core.dev);
+}
+#else
+void hda_codec_jack_wake_enable(struct snd_sof_dev *sdev, bool enable) {}
+void hda_codec_jack_check(struct snd_sof_dev *sdev) {}
+#endif /* CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC */
+EXPORT_SYMBOL_NS(hda_codec_jack_wake_enable, SND_SOC_SOF_HDA_AUDIO_CODEC);
+EXPORT_SYMBOL_NS(hda_codec_jack_check, SND_SOC_SOF_HDA_AUDIO_CODEC);
+
+#if IS_ENABLED(CONFIG_SND_HDA_GENERIC)
+#define is_generic_config(bus) \
+	((bus)->modelname && !strcmp((bus)->modelname, "generic"))
+#else
+#define is_generic_config(x)	0
+#endif
+
+static struct hda_codec *hda_codec_device_init(struct hdac_bus *bus, int addr, int type)
+{
+	struct hda_codec *codec;
+
+	codec = snd_hda_codec_device_init(to_hda_bus(bus), addr, "ehdaudio%dD%d", bus->idx, addr);
+	if (IS_ERR(codec)) {
+		dev_err(bus->dev, "device init failed for hdac device\n");
+		return codec;
+	}
+
+	codec->core.type = type;
+
+	return codec;
+}
+
+/* probe individual codec */
+static int hda_codec_probe(struct snd_sof_dev *sdev, int address,
+			   bool hda_codec_use_common_hdmi)
+{
+#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC)
+	struct hdac_hda_priv *hda_priv;
+	int type = HDA_DEV_LEGACY;
+#endif
+	struct hda_bus *hbus = sof_to_hbus(sdev);
+	struct hda_codec *codec;
+	u32 hda_cmd = (address << 28) | (AC_NODE_ROOT << 20) |
+		(AC_VERB_PARAMETERS << 8) | AC_PAR_VENDOR_ID;
+	u32 resp = -1;
+	int ret, retry = 0;
+
+	do {
+		mutex_lock(&hbus->core.cmd_mutex);
+		snd_hdac_bus_send_cmd(&hbus->core, hda_cmd);
+		snd_hdac_bus_get_response(&hbus->core, address, &resp);
+		mutex_unlock(&hbus->core.cmd_mutex);
+	} while (resp == -1 && retry++ < CODEC_PROBE_RETRIES);
+
+	if (resp == -1)
+		return -EIO;
+	dev_dbg(sdev->dev, "HDA codec #%d probed OK: response: %x\n",
+		address, resp);
+
+#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC)
+	hda_priv = devm_kzalloc(sdev->dev, sizeof(*hda_priv), GFP_KERNEL);
+	if (!hda_priv)
+		return -ENOMEM;
+
+	/* only probe ASoC codec drivers for HDAC-HDMI */
+	if (!hda_codec_use_common_hdmi && (resp & 0xFFFF0000) == IDISP_VID_INTEL)
+		type = HDA_DEV_ASOC;
+
+	codec = hda_codec_device_init(&hbus->core, address, type);
+	ret = PTR_ERR_OR_ZERO(codec);
+	if (ret < 0)
+		return ret;
+
+	hda_priv->codec = codec;
+	dev_set_drvdata(&codec->core.dev, hda_priv);
+
+	if ((resp & 0xFFFF0000) == IDISP_VID_INTEL) {
+		if (!hbus->core.audio_component) {
+			dev_dbg(sdev->dev,
+				"iDisp hw present but no driver\n");
+			ret = -ENOENT;
+			goto out;
+		}
+		hda_priv->need_display_power = true;
+	}
+
+	if (is_generic_config(hbus))
+		codec->probe_id = HDA_CODEC_ID_GENERIC;
+	else
+		codec->probe_id = 0;
+
+	if (type == HDA_DEV_LEGACY) {
+		ret = hda_codec_load_module(codec);
+		/*
+		 * handle ret==0 (no driver bound) as an error, but pass
+		 * other return codes without modification
+		 */
+		if (ret == 0)
+			ret = -ENOENT;
+	}
+
+out:
+	if (ret < 0) {
+		snd_hdac_device_unregister(&codec->core);
+		put_device(&codec->core.dev);
+	}
+#else
+	codec = hda_codec_device_init(&hbus->core, address, HDA_DEV_ASOC);
+	ret = PTR_ERR_OR_ZERO(codec);
+#endif
+
+	return ret;
+}
+
+/* Codec initialization */
+void hda_codec_probe_bus(struct snd_sof_dev *sdev,
+			 bool hda_codec_use_common_hdmi)
+{
+	struct hdac_bus *bus = sof_to_bus(sdev);
+	int i, ret;
+
+	/* probe codecs in avail slots */
+	for (i = 0; i < HDA_MAX_CODECS; i++) {
+
+		if (!(bus->codec_mask & (1 << i)))
+			continue;
+
+		ret = hda_codec_probe(sdev, i, hda_codec_use_common_hdmi);
+		if (ret < 0) {
+			dev_warn(bus->dev, "codec #%d probe error, ret: %d\n",
+				 i, ret);
+			bus->codec_mask &= ~BIT(i);
+		}
+	}
+}
+EXPORT_SYMBOL_NS(hda_codec_probe_bus, SND_SOC_SOF_HDA_AUDIO_CODEC);
+
+#if IS_ENABLED(CONFIG_SND_HDA_CODEC_HDMI) || \
+	IS_ENABLED(CONFIG_SND_SOC_HDAC_HDMI)
+
+void hda_codec_i915_display_power(struct snd_sof_dev *sdev, bool enable)
+{
+	struct hdac_bus *bus = sof_to_bus(sdev);
+
+	if (HDA_IDISP_CODEC(bus->codec_mask)) {
+		dev_dbg(bus->dev, "Turning i915 HDAC power %d\n", enable);
+		snd_hdac_display_power(bus, HDA_CODEC_IDX_CONTROLLER, enable);
+	}
+}
+EXPORT_SYMBOL_NS(hda_codec_i915_display_power, SND_SOC_SOF_HDA_AUDIO_CODEC_I915);
+
+int hda_codec_i915_init(struct snd_sof_dev *sdev)
+{
+	struct hdac_bus *bus = sof_to_bus(sdev);
+	int ret;
+
+	/* i915 exposes a HDA codec for HDMI audio */
+	ret = snd_hdac_i915_init(bus);
+	if (ret < 0)
+		return ret;
+
+	/* codec_mask not yet known, power up for probe */
+	snd_hdac_display_power(bus, HDA_CODEC_IDX_CONTROLLER, true);
+
+	return 0;
+}
+EXPORT_SYMBOL_NS(hda_codec_i915_init, SND_SOC_SOF_HDA_AUDIO_CODEC_I915);
+
+int hda_codec_i915_exit(struct snd_sof_dev *sdev)
+{
+	struct hdac_bus *bus = sof_to_bus(sdev);
+
+	if (!bus->audio_component)
+		return 0;
+
+	/* power down unconditionally */
+	snd_hdac_display_power(bus, HDA_CODEC_IDX_CONTROLLER, false);
+
+	return snd_hdac_i915_exit(bus);
+}
+EXPORT_SYMBOL_NS(hda_codec_i915_exit, SND_SOC_SOF_HDA_AUDIO_CODEC_I915);
+
+#endif
+
+MODULE_LICENSE("Dual BSD/GPL");