92 lines
2.2 KiB
C
92 lines
2.2 KiB
C
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// SPDX-License-Identifier: GPL-2.0-only
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//
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// Copyright(c) 2019 Intel Corporation. All rights reserved.
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#include <linux/module.h>
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#include <sound/pcm.h>
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#include <sound/soc.h>
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#include <sound/hda_codec.h>
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#include <sound/hda_i915.h>
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#include "../../codecs/hdac_hda.h"
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#include "hda_dsp_common.h"
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#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC)
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/*
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* Search card topology and return PCM device number
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* matching Nth HDMI device (zero-based index).
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*/
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static struct snd_pcm *hda_dsp_hdmi_pcm_handle(struct snd_soc_card *card,
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int hdmi_idx)
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{
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struct snd_soc_pcm_runtime *rtd;
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struct snd_pcm *spcm;
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int i = 0;
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for_each_card_rtds(card, rtd) {
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spcm = rtd->pcm ?
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rtd->pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].pcm : NULL;
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if (spcm && strstr(spcm->id, "HDMI")) {
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if (i == hdmi_idx)
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return rtd->pcm;
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++i;
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}
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}
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return NULL;
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}
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/*
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* Search card topology and register HDMI PCM related controls
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* to codec driver.
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*/
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int hda_dsp_hdmi_build_controls(struct snd_soc_card *card,
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struct snd_soc_component *comp)
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{
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struct hdac_hda_priv *hda_pvt;
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struct hda_codec *hcodec;
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struct snd_pcm *spcm;
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struct hda_pcm *hpcm;
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int err = 0, i = 0;
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if (!comp)
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return -EINVAL;
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hda_pvt = snd_soc_component_get_drvdata(comp);
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hcodec = hda_pvt->codec;
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list_for_each_entry(hpcm, &hcodec->pcm_list_head, list) {
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spcm = hda_dsp_hdmi_pcm_handle(card, i);
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if (spcm) {
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hpcm->pcm = spcm;
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hpcm->device = spcm->device;
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dev_dbg(card->dev,
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"mapping HDMI converter %d to PCM %d (%p)\n",
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i, hpcm->device, spcm);
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} else {
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hpcm->pcm = NULL;
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hpcm->device = SNDRV_PCM_INVALID_DEVICE;
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dev_warn(card->dev,
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"%s: no PCM in topology for HDMI converter %d\n",
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__func__, i);
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}
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i++;
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}
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snd_hdac_display_power(hcodec->core.bus,
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HDA_CODEC_IDX_CONTROLLER, true);
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err = snd_hda_codec_build_controls(hcodec);
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if (err < 0)
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dev_err(card->dev, "unable to create controls %d\n", err);
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snd_hdac_display_power(hcodec->core.bus,
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HDA_CODEC_IDX_CONTROLLER, false);
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return err;
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}
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EXPORT_SYMBOL_NS(hda_dsp_hdmi_build_controls, SND_SOC_INTEL_HDA_DSP_COMMON);
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#endif
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MODULE_DESCRIPTION("ASoC Intel HDMI helpers");
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MODULE_LICENSE("GPL");
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