sound/soc/sof/intel/hda-bus.c

   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
   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_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 #else
  82         snd_hdac_ext_bus_init(bus, dev, NULL, NULL);
  83 #endif
  84 #else
  85
  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 }
 102 EXPORT_SYMBOL_NS(sof_hda_bus_init, "SND_SOC_SOF_INTEL_HDA_COMMON");
 103
 104 void 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 #endif
 111 }
 112 EXPORT_SYMBOL_NS(sof_hda_bus_exit, "SND_SOC_SOF_INTEL_HDA_COMMON");