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1// SPDX-License-Identifier: GPL-2.0-only2//3// Copyright(c) 2019 Intel Corporation4 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 number18 * 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 controls42 * 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 "mapping HDMI converter %d to PCM %d (%p)\n",66 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",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#endif89 90MODULE_DESCRIPTION("ASoC Intel HDMI helpers");91MODULE_LICENSE("GPL");92