LXR linux/sound/soc/intel/boards/hda_dsp

   1// SPDX-License-Identifier: GPL-2.0-only
   2//
   3// Copyright(c) 2019 Intel Corporation. All rights reserved.
   4
   5#include <linux/module.h>
   6#include <sound/pcm.h>
   7#include <sound/soc.h>
   8#include <sound/hda_codec.h>
   9#include <sound/hda_i915.h>
  10#include "../../codecs/hdac_hda.h"
  11
  12#include "hda_dsp_common.h"
  13
  14#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC)
  15
  16/*
  17 * Search card topology and return PCM device number
  18 * matching Nth HDMI device (zero-based index).
  19 */
  20static struct snd_pcm *hda_dsp_hdmi_pcm_handle(struct snd_soc_card *card,
  21                                               int hdmi_idx)
  22{
  23        struct snd_soc_pcm_runtime *rtd;
  24        struct snd_pcm *spcm;
  25        int i = 0;
  26
  27        for_each_card_rtds(card, rtd) {
  28                spcm = rtd->pcm ?
  29                        rtd->pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].pcm : NULL;
  30                if (spcm && strstr(spcm->id, "HDMI")) {
  31                        if (i == hdmi_idx)
  32                                return rtd->pcm;
  33                        ++i;
  34                }
  35        }
  36
  37        return NULL;
  38}
  39
  40/*
  41 * Search card topology and register HDMI PCM related controls
  42 * to codec driver.
  43 */
  44int hda_dsp_hdmi_build_controls(struct snd_soc_card *card,
  45                                struct snd_soc_component *comp)
  46{
  47        struct hdac_hda_priv *hda_pvt;
  48        struct hda_codec *hcodec;
  49        struct snd_pcm *spcm;
  50        struct hda_pcm *hpcm;
  51        int err = 0, i = 0;
  52
  53        if (!comp)
  54                return -EINVAL;
  55
  56        hda_pvt = snd_soc_component_get_drvdata(comp);
  57        hcodec = &hda_pvt->codec;
  58
  59        list_for_each_entry(hpcm, &hcodec->pcm_list_head, list) {
  60                spcm = hda_dsp_hdmi_pcm_handle(card, i);
  61                if (spcm) {
  62                        hpcm->pcm = spcm;
  63                        hpcm->device = spcm->device;
  64                        dev_dbg(card->dev,
  65                                "%s: mapping HDMI converter %d to PCM %d (%p)\n",
  66                                __func__, i, hpcm->device, spcm);
  67                } else {
  68                        hpcm->pcm = NULL;
  69                        hpcm->device = SNDRV_PCM_INVALID_DEVICE;
  70                        dev_warn(card->dev,
  71                                 "%s: no PCM in topology for HDMI converter %d\n\n",
  72                                 __func__, i);
  73                }
  74                i++;
  75        }
  76        snd_hdac_display_power(hcodec->core.bus,
  77                               HDA_CODEC_IDX_CONTROLLER, true);
  78        err = snd_hda_codec_build_controls(hcodec);
  79        if (err < 0)
  80                dev_err(card->dev, "unable to create controls %d\n", err);
  81        snd_hdac_display_power(hcodec->core.bus,
  82                               HDA_CODEC_IDX_CONTROLLER, false);
  83
  84        return err;
  85}
  86EXPORT_SYMBOL_NS(hda_dsp_hdmi_build_controls, SND_SOC_INTEL_HDA_DSP_COMMON);
  87
  88#endif
  89
  90MODULE_DESCRIPTION("ASoC Intel HDMI helpers");
  91MODULE_LICENSE("GPL");
  92