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// 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"
#define CODEC_PROBE_RETRIES 3
#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 = 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);
}
EXPORT_SYMBOL_NS(hda_codec_jack_wake_enable, SND_SOC_SOF_HDA_AUDIO_CODEC);
/* 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);
}
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 void hda_codec_device_exit(struct device *dev)
{
snd_hdac_device_exit(dev_to_hdac_dev(dev));
}
static struct hda_codec *hda_codec_device_init(struct hdac_bus *bus, int addr, int type)
{
struct hda_codec *codec;
int ret;
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;
codec->core.dev.release = hda_codec_device_exit;
ret = snd_hdac_device_register(&codec->core);
if (ret) {
dev_err(bus->dev, "failed to register hdac device\n");
snd_hdac_device_exit(&codec->core);
return ERR_PTR(ret);
}
return codec;
}
/* probe individual codec */
static int hda_codec_probe(struct snd_sof_dev *sdev, int address)
{
struct hdac_hda_priv *hda_priv;
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);
hda_priv = devm_kzalloc(sdev->dev, sizeof(*hda_priv), GFP_KERNEL);
if (!hda_priv)
return -ENOMEM;
codec = hda_codec_device_init(&hbus->core, address, HDA_DEV_LEGACY);
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;
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);
}
return ret;
}
/* Codec initialization */
void hda_codec_probe_bus(struct snd_sof_dev *sdev)
{
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);
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);
#endif /* CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC */
#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC) && IS_ENABLED(CONFIG_SND_HDA_CODEC_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");
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