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