sound/soc/intel/boards/hda_dsp_common.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 //
   3 // Copyright(c) 2019 Intel Corporation. All rights reserved.
   4
   5 #include <sound/pcm.h>
   6 #include <sound/soc.h>
   7 #include <sound/hda_codec.h>
   8 #include <sound/hda_i915.h>
   9 #include "../../codecs/hdac_hda.h"
  10
  11 #include "hda_dsp_common.h"
  12
  13 #if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC)
  14
  15 /*
  16  * Search card topology and return PCM device number
  17  * matching Nth HDMI device (zero-based index).
  18  */
  19 static struct snd_pcm *hda_dsp_hdmi_pcm_handle(struct snd_soc_card *card,
  20                                                int hdmi_idx)
  21 {
  22         struct snd_soc_pcm_runtime *rtd;
  23         struct snd_pcm *spcm;
  24         int i = 0;
  25
  26         for_each_card_rtds(card, rtd) {
  27                 spcm = rtd->pcm ?
  28                         rtd->pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].pcm : NULL;
  29                 if (spcm && strstr(spcm->id, "HDMI")) {
  30                         if (i == hdmi_idx)
  31                                 return rtd->pcm;
  32                         ++i;
  33                 }
  34         }
  35
  36         return NULL;
  37 }
  38
  39 /*
  40  * Search card topology and register HDMI PCM related controls
  41  * to codec driver.
  42  */
  43 int hda_dsp_hdmi_build_controls(struct snd_soc_card *card,
  44                                 struct snd_soc_component *comp)
  45 {
  46         struct hdac_hda_priv *hda_pvt;
  47         struct hda_codec *hcodec;
  48         struct snd_pcm *spcm;
  49         struct hda_pcm *hpcm;
  50         int err = 0, i = 0;
  51
  52         if (!comp)
  53                 return -EINVAL;
  54
  55         hda_pvt = snd_soc_component_get_drvdata(comp);
  56         hcodec = &hda_pvt->codec;
  57
  58         list_for_each_entry(hpcm, &hcodec->pcm_list_head, list) {
  59                 spcm = hda_dsp_hdmi_pcm_handle(card, i);
  60                 if (spcm) {
  61                         hpcm->pcm = spcm;
  62                         hpcm->device = spcm->device;
  63                         dev_dbg(card->dev,
  64                                 "%s: mapping HDMI converter %d to PCM %d (%p)\n",
  65                                 __func__, i, hpcm->device, spcm);
  66                 } else {
  67                         hpcm->pcm = NULL;
  68                         hpcm->device = SNDRV_PCM_INVALID_DEVICE;
  69                         dev_warn(card->dev,
  70                                  "%s: no PCM in topology for HDMI converter %d\n\n",
  71                                  __func__, i);
  72                 }
  73                 i++;
  74         }
  75         snd_hdac_display_power(hcodec->core.bus,
  76                                HDA_CODEC_IDX_CONTROLLER, true);
  77         err = snd_hda_codec_build_controls(hcodec);
  78         if (err < 0)
  79                 dev_err(card->dev, "unable to create controls %d\n", err);
  80         snd_hdac_display_power(hcodec->core.bus,
  81                                HDA_CODEC_IDX_CONTROLLER, false);
  82
  83         return err;
  84 }
  85
  86 #endif