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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 or4// redistributing this file, you may do so under either license.5//6// Copyright(c) 2018 Intel Corporation7//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 22static 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 else29 mask |= BIT(addr);30 31 snd_hdac_chip_updatew(bus, WAKEEN, STATESTS_INT_MASK, mask);32}33 34static 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 to46 * 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, release50 * 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 59static 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#endif65 66/*67 * This can be used for both with/without hda link support.68 */69void 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_LINK)74#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC)75 const struct sof_intel_dsp_desc *chip = get_chip_info(sdev->pdata);76 77 snd_hdac_ext_bus_init(bus, dev, &bus_core_ops, sof_hda_ext_ops);78 79 if (chip && chip->hw_ip_version == SOF_INTEL_ACE_2_0)80 bus->use_pio_for_commands = true;81#else82 snd_hdac_ext_bus_init(bus, dev, NULL, NULL);83#endif84#else85 86 memset(bus, 0, sizeof(*bus));87 bus->dev = dev;88 89 INIT_LIST_HEAD(&bus->stream_list);90 91 bus->irq = -1;92 93 /*94 * There is only one HDA bus atm. keep the index as 0.95 * Need to fix when there are more than one HDA bus.96 */97 bus->idx = 0;98 99 spin_lock_init(&bus->reg_lock);100#endif /* CONFIG_SND_SOC_SOF_HDA_LINK */101}102EXPORT_SYMBOL_NS(sof_hda_bus_init, SND_SOC_SOF_INTEL_HDA_COMMON);103 104void sof_hda_bus_exit(struct snd_sof_dev *sdev)105{106#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_LINK)107 struct hdac_bus *bus = sof_to_bus(sdev);108 109 snd_hdac_ext_bus_exit(bus);110#endif111}112EXPORT_SYMBOL_NS(sof_hda_bus_exit, SND_SOC_SOF_INTEL_HDA_COMMON);113