diff options
Diffstat (limited to 'sound/soc/sof/intel/hda-codec.c')
| -rw-r--r-- | sound/soc/sof/intel/hda-codec.c | 171 |
1 files changed, 171 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 000000000000..b8b37f082309 --- /dev/null +++ b/sound/soc/sof/intel/hda-codec.c @@ -0,0 +1,171 @@ +// SPDX-License-Identifier: (GPL-2.0 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_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 */ + +#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC) +#define IDISP_VID_INTEL 0x80860000 + +/* load the legacy HDA codec driver */ +#ifdef MODULE +static void hda_codec_load_module(struct hda_codec *codec) +{ + char alias[MODULE_NAME_LEN]; + const char *module = alias; + + snd_hdac_codec_modalias(&codec->core, alias, sizeof(alias)); + dev_dbg(&codec->core.dev, "loading codec module: %s\n", module); + request_module(module); +} +#else +static void hda_codec_load_module(struct hda_codec *codec) {} +#endif + +#endif /* CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC */ + +/* probe individual codec */ +static int hda_codec_probe(struct snd_sof_dev *sdev, int address) +{ + struct hda_bus *hbus = sof_to_hbus(sdev); + struct hdac_device *hdev; +#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC) + struct hdac_hda_priv *hda_priv; +#endif + u32 hda_cmd = (address << 28) | (AC_NODE_ROOT << 20) | + (AC_VERB_PARAMETERS << 8) | AC_PAR_VENDOR_ID; + u32 resp = -1; + int ret; + + 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); + 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) + /* snd_hdac_ext_bus_device_exit will use kfree to free hdev */ + hda_priv = kzalloc(sizeof(*hda_priv), GFP_KERNEL); + if (!hda_priv) + return -ENOMEM; + + hda_priv->codec.bus = hbus; + hdev = &hda_priv->codec.core; + + ret = snd_hdac_ext_bus_device_init(&hbus->core, address, hdev); + if (ret < 0) + return ret; + + /* use legacy bus only for HDA codecs, idisp uses ext bus */ + if ((resp & 0xFFFF0000) != IDISP_VID_INTEL) { + hdev->type = HDA_DEV_LEGACY; + hda_codec_load_module(&hda_priv->codec); + } + + return 0; +#else + /* snd_hdac_ext_bus_device_exit will use kfree to free hdev */ + hdev = kzalloc(sizeof(*hdev), GFP_KERNEL); + if (!hdev) + return -ENOMEM; + + ret = snd_hdac_ext_bus_device_init(&hbus->core, address, hdev); + + return ret; +#endif +} + +/* Codec initialization */ +int 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_err(bus->dev, "error: codec #%d probe error, ret: %d\n", + i, ret); + return ret; + } + } + + return 0; +} +EXPORT_SYMBOL(hda_codec_probe_bus); + +#if IS_ENABLED(CONFIG_SND_SOC_HDAC_HDMI) + +void hda_codec_i915_get(struct snd_sof_dev *sdev) +{ + struct hdac_bus *bus = sof_to_bus(sdev); + + dev_dbg(bus->dev, "Turning i915 HDAC power on\n"); + snd_hdac_display_power(bus, HDA_CODEC_IDX_CONTROLLER, true); +} +EXPORT_SYMBOL(hda_codec_i915_get); + +void hda_codec_i915_put(struct snd_sof_dev *sdev) +{ + struct hdac_bus *bus = sof_to_bus(sdev); + + dev_dbg(bus->dev, "Turning i915 HDAC power off\n"); + snd_hdac_display_power(bus, HDA_CODEC_IDX_CONTROLLER, false); +} +EXPORT_SYMBOL(hda_codec_i915_put); + +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; + + hda_codec_i915_get(sdev); + + return 0; +} +EXPORT_SYMBOL(hda_codec_i915_init); + +int hda_codec_i915_exit(struct snd_sof_dev *sdev) +{ + struct hdac_bus *bus = sof_to_bus(sdev); + int ret; + + hda_codec_i915_put(sdev); + + ret = snd_hdac_i915_exit(bus); + + return ret; +} +EXPORT_SYMBOL(hda_codec_i915_exit); + +#endif /* CONFIG_SND_SOC_HDAC_HDMI */ + +MODULE_LICENSE("Dual BSD/GPL"); |