1 // SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) 2 // 3 // This file is provided under a dual BSD/GPLv2 license. When using or 4 // redistributing this file, you may do so under either license. 5 // 6 // Copyright(c) 2018 Intel Corporation. All rights reserved. 7 // 8 // Authors: Keyon Jie <yang.jie@linux.intel.com> 9 // 10 11 #include <linux/module.h> 12 #include <sound/hdaudio_ext.h> 13 #include <sound/hda_codec.h> 14 #include <sound/hda_i915.h> 15 #include <sound/sof.h> 16 #include "../ops.h" 17 #include "hda.h" 18 #if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC) 19 #include "../../codecs/hdac_hda.h" 20 #endif /* CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC */ 21 22 #if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC) 23 #define IDISP_VID_INTEL 0x80860000 24 25 /* load the legacy HDA codec driver */ 26 #ifdef MODULE 27 static void hda_codec_load_module(struct hda_codec *codec) 28 { 29 char alias[MODULE_NAME_LEN]; 30 const char *module = alias; 31 32 snd_hdac_codec_modalias(&codec->core, alias, sizeof(alias)); 33 dev_dbg(&codec->core.dev, "loading codec module: %s\n", module); 34 request_module(module); 35 } 36 #else 37 static void hda_codec_load_module(struct hda_codec *codec) {} 38 #endif 39 40 #endif /* CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC */ 41 42 /* probe individual codec */ 43 static int hda_codec_probe(struct snd_sof_dev *sdev, int address) 44 { 45 struct hda_bus *hbus = sof_to_hbus(sdev); 46 struct hdac_device *hdev; 47 #if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC) 48 struct hdac_hda_priv *hda_priv; 49 #endif 50 u32 hda_cmd = (address << 28) | (AC_NODE_ROOT << 20) | 51 (AC_VERB_PARAMETERS << 8) | AC_PAR_VENDOR_ID; 52 u32 resp = -1; 53 int ret; 54 55 mutex_lock(&hbus->core.cmd_mutex); 56 snd_hdac_bus_send_cmd(&hbus->core, hda_cmd); 57 snd_hdac_bus_get_response(&hbus->core, address, &resp); 58 mutex_unlock(&hbus->core.cmd_mutex); 59 if (resp == -1) 60 return -EIO; 61 dev_dbg(sdev->dev, "HDA codec #%d probed OK: response: %x\n", 62 address, resp); 63 64 #if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC) 65 /* snd_hdac_ext_bus_device_exit will use kfree to free hdev */ 66 hda_priv = kzalloc(sizeof(*hda_priv), GFP_KERNEL); 67 if (!hda_priv) 68 return -ENOMEM; 69 70 hda_priv->codec.bus = hbus; 71 hdev = &hda_priv->codec.core; 72 73 ret = snd_hdac_ext_bus_device_init(&hbus->core, address, hdev); 74 if (ret < 0) 75 return ret; 76 77 /* use legacy bus only for HDA codecs, idisp uses ext bus */ 78 if ((resp & 0xFFFF0000) != IDISP_VID_INTEL) { 79 hdev->type = HDA_DEV_LEGACY; 80 hda_codec_load_module(&hda_priv->codec); 81 } 82 83 return 0; 84 #else 85 /* snd_hdac_ext_bus_device_exit will use kfree to free hdev */ 86 hdev = kzalloc(sizeof(*hdev), GFP_KERNEL); 87 if (!hdev) 88 return -ENOMEM; 89 90 ret = snd_hdac_ext_bus_device_init(&hbus->core, address, hdev); 91 92 return ret; 93 #endif 94 } 95 96 /* Codec initialization */ 97 int hda_codec_probe_bus(struct snd_sof_dev *sdev) 98 { 99 struct hdac_bus *bus = sof_to_bus(sdev); 100 int i, ret; 101 102 /* probe codecs in avail slots */ 103 for (i = 0; i < HDA_MAX_CODECS; i++) { 104 105 if (!(bus->codec_mask & (1 << i))) 106 continue; 107 108 ret = hda_codec_probe(sdev, i); 109 if (ret < 0) { 110 dev_err(bus->dev, "error: codec #%d probe error, ret: %d\n", 111 i, ret); 112 return ret; 113 } 114 } 115 116 return 0; 117 } 118 EXPORT_SYMBOL(hda_codec_probe_bus); 119 120 #if IS_ENABLED(CONFIG_SND_SOC_HDAC_HDMI) 121 122 void hda_codec_i915_get(struct snd_sof_dev *sdev) 123 { 124 struct hdac_bus *bus = sof_to_bus(sdev); 125 126 dev_dbg(bus->dev, "Turning i915 HDAC power on\n"); 127 snd_hdac_display_power(bus, HDA_CODEC_IDX_CONTROLLER, true); 128 } 129 EXPORT_SYMBOL(hda_codec_i915_get); 130 131 void hda_codec_i915_put(struct snd_sof_dev *sdev) 132 { 133 struct hdac_bus *bus = sof_to_bus(sdev); 134 135 dev_dbg(bus->dev, "Turning i915 HDAC power off\n"); 136 snd_hdac_display_power(bus, HDA_CODEC_IDX_CONTROLLER, false); 137 } 138 EXPORT_SYMBOL(hda_codec_i915_put); 139 140 int hda_codec_i915_init(struct snd_sof_dev *sdev) 141 { 142 struct hdac_bus *bus = sof_to_bus(sdev); 143 int ret; 144 145 /* i915 exposes a HDA codec for HDMI audio */ 146 ret = snd_hdac_i915_init(bus); 147 if (ret < 0) 148 return ret; 149 150 hda_codec_i915_get(sdev); 151 152 return 0; 153 } 154 EXPORT_SYMBOL(hda_codec_i915_init); 155 156 int hda_codec_i915_exit(struct snd_sof_dev *sdev) 157 { 158 struct hdac_bus *bus = sof_to_bus(sdev); 159 int ret; 160 161 hda_codec_i915_put(sdev); 162 163 ret = snd_hdac_i915_exit(bus); 164 165 return ret; 166 } 167 EXPORT_SYMBOL(hda_codec_i915_exit); 168 169 #endif /* CONFIG_SND_SOC_HDAC_HDMI */ 170 171 MODULE_LICENSE("Dual BSD/GPL"); 172