hda_dsp_common.c

  1// SPDX-License-Identifier: GPL-2.0-only
  2//
  3// Copyright(c) 2019 Intel Corporation
  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 playback 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		/* ignore BE PCMs */
 29		if (rtd->dai_link && rtd->dai_link->no_pcm)
 30			continue;
 31
 32		spcm = rtd->pcm;
 33
 34		/* ignore PCMs with no playback streams */
 35		if (!spcm || !spcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream)
 36			continue;
 37
 38		/* look for FE PCMs with name "HDMI x" */
 39		if (spcm && strstr(spcm->id, "HDMI")) {
 40			if (i == hdmi_idx)
 41				return rtd->pcm;
 42			++i;
 43		}
 44	}
 45
 46	return NULL;
 47}
 48
 49/*
 50 * Search card topology and register HDMI PCM related controls
 51 * to codec driver.
 52 */
 53int hda_dsp_hdmi_build_controls(struct snd_soc_card *card,
 54				struct snd_soc_component *comp)
 55{
 56	struct hdac_hda_priv *hda_pvt;
 57	struct hda_codec *hcodec;
 58	struct snd_pcm *spcm;
 59	struct hda_pcm *hpcm;
 60	int err = 0, i = 0;
 61
 62	if (!comp)
 63		return -EINVAL;
 64
 65	hda_pvt = snd_soc_component_get_drvdata(comp);
 66	hcodec = hda_pvt->codec;
 67
 68	list_for_each_entry(hpcm, &hcodec->pcm_list_head, list) {
 69		spcm = hda_dsp_hdmi_pcm_handle(card, i);
 70		if (spcm) {
 71			hpcm->pcm = spcm;
 72			hpcm->device = spcm->device;
 73			dev_dbg(card->dev,
 74				"mapping HDMI converter %d to PCM %d (%p)\n",
 75				i, hpcm->device, spcm);
 76		} else {
 77			hpcm->pcm = NULL;
 78			hpcm->device = SNDRV_PCM_INVALID_DEVICE;
 79			dev_warn(card->dev,
 80				 "%s: no PCM in topology for HDMI converter %d\n",
 81				 __func__, i);
 82		}
 83		i++;
 84	}
 85	snd_hdac_display_power(hcodec->core.bus,
 86			       HDA_CODEC_IDX_CONTROLLER, true);
 87	err = snd_hda_codec_build_controls(hcodec);
 88	if (err < 0)
 89		dev_err(card->dev, "unable to create controls %d\n", err);
 90	snd_hdac_display_power(hcodec->core.bus,
 91			       HDA_CODEC_IDX_CONTROLLER, false);
 92
 93	return err;
 94}
 95EXPORT_SYMBOL_NS(hda_dsp_hdmi_build_controls, "SND_SOC_INTEL_HDA_DSP_COMMON");
 96
 97#endif
 98
 99MODULE_DESCRIPTION("ASoC Intel HDMI helpers");
100MODULE_LICENSE("GPL");