1 // SPDX-License-Identifier: (GPL-2.0-only 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 #include <linux/io.h> 11 #include <sound/hdaudio.h> 12 #include <sound/hda_i915.h> 13 #include <sound/hda_codec.h> 14 #include <sound/hda_register.h> 15 #include "../sof-priv.h" 16 #include "hda.h" 17 18 #if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC) 19 #include "../../codecs/hdac_hda.h" 20 #define sof_hda_ext_ops snd_soc_hdac_hda_get_ops() 21 22 static void update_codec_wake_enable(struct hdac_bus *bus, unsigned int addr, bool link_power) 23 { 24 unsigned int mask = snd_hdac_chip_readw(bus, WAKEEN); 25 26 if (link_power) 27 mask &= ~BIT(addr); 28 else 29 mask |= BIT(addr); 30 31 snd_hdac_chip_updatew(bus, WAKEEN, STATESTS_INT_MASK, mask); 32 } 33 34 static void sof_hda_bus_link_power(struct hdac_device *codec, bool enable) 35 { 36 struct hdac_bus *bus = codec->bus; 37 bool oldstate = test_bit(codec->addr, &bus->codec_powered); 38 39 snd_hdac_ext_bus_link_power(codec, enable); 40 41 if (enable == oldstate) 42 return; 43 44 /* 45 * Both codec driver and controller can hold references to 46 * display power. To avoid unnecessary power-up/down cycles, 47 * controller doesn't immediately release its reference. 48 * 49 * If the codec driver powers down the link, release 50 * the controller reference as well. 51 */ 52 if (codec->addr == HDA_IDISP_ADDR && !enable) 53 snd_hdac_display_power(bus, HDA_CODEC_IDX_CONTROLLER, false); 54 55 /* WAKEEN needs to be set for disabled links */ 56 update_codec_wake_enable(bus, codec->addr, enable); 57 } 58 59 static const struct hdac_bus_ops bus_core_ops = { 60 .command = snd_hdac_bus_send_cmd, 61 .get_response = snd_hdac_bus_get_response, 62 .link_power = sof_hda_bus_link_power, 63 }; 64 #endif 65 66 /* 67 * This can be used for both with/without hda link support. 68 */ 69 void sof_hda_bus_init(struct snd_sof_dev *sdev, struct device *dev) 70 { 71 struct hdac_bus *bus = sof_to_bus(sdev); 72 73 #if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC) 74 snd_hdac_ext_bus_init(bus, dev, &bus_core_ops, sof_hda_ext_ops); 75 #else /* CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC */ 76 memset(bus, 0, sizeof(*bus)); 77 bus->dev = dev; 78 79 INIT_LIST_HEAD(&bus->stream_list); 80 81 bus->irq = -1; 82 83 /* 84 * There is only one HDA bus atm. keep the index as 0. 85 * Need to fix when there are more than one HDA bus. 86 */ 87 bus->idx = 0; 88 89 spin_lock_init(&bus->reg_lock); 90 #endif /* CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC */ 91 } 92 93 void sof_hda_bus_exit(struct snd_sof_dev *sdev) 94 { 95 #if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC) 96 struct hdac_bus *bus = sof_to_bus(sdev); 97 98 snd_hdac_ext_bus_exit(bus); 99 #endif 100 } 101