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 HDMI device (zero-based index).
19 */
20 static 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 */
44 int 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 }
86 EXPORT_SYMBOL_NS(hda_dsp_hdmi_build_controls, SND_SOC_INTEL_HDA_DSP_COMMON);
87
88 #endif
89
90 MODULE_DESCRIPTION("ASoC Intel HDMI helpers");
91 MODULE_LICENSE("GPL");
92
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