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 */
19static 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 */
43int 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
87