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

DEFINITIONS

1. sof_hda_bus_init

   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 #include <linux/io.h>
  11 #include <sound/hdaudio.h>
  12 #include "../sof-priv.h"
  13 #include "hda.h"
  14 
  15 #if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC)
  16 #include "../../codecs/hdac_hda.h"
  17 #define sof_hda_ext_ops snd_soc_hdac_hda_get_ops()
  18 #else
  19 #define sof_hda_ext_ops NULL
  20 #endif
  21 
  22 /*
  23  * This can be used for both with/without hda link support.
  24  */
  25 void sof_hda_bus_init(struct hdac_bus *bus, struct device *dev)
  26 {
  27 #if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA)
  28         snd_hdac_ext_bus_init(bus, dev, NULL, sof_hda_ext_ops);
  29 #else /* CONFIG_SND_SOC_SOF_HDA */
  30         memset(bus, 0, sizeof(*bus));
  31         bus->dev = dev;
  32 
  33         INIT_LIST_HEAD(&bus->stream_list);
  34 
  35         bus->irq = -1;
  36 
  37         /*
  38          * There is only one HDA bus atm. keep the index as 0.
  39          * Need to fix when there are more than one HDA bus.
  40          */
  41         bus->idx = 0;
  42 
  43         spin_lock_init(&bus->reg_lock);
  44 #endif /* CONFIG_SND_SOC_SOF_HDA */
  45 }