1 // SPDX-License-Identifier: GPL-2.0-only
2 //
3 // Copyright(c) 2019 Intel Corporation. All rights reserved.
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