1 // SPDX-License-Identifier: GPL-2.0
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 /*
14  * Search card topology and return PCM device number
15  * matching Nth HDMI device (zero-based index).
16  */
17 struct snd_pcm *hda_dsp_hdmi_pcm_handle(struct snd_soc_card *card,
18 					int hdmi_idx)
19 {
20 	struct snd_soc_pcm_runtime *rtd;
21 	struct snd_pcm *spcm;
22 	int i = 0;
23 
24 	for_each_card_rtds(card, rtd) {
25 		spcm = rtd->pcm ?
26 			rtd->pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].pcm : NULL;
27 		if (spcm && strstr(spcm->id, "HDMI")) {
28 			if (i == hdmi_idx)
29 				return rtd->pcm;
30 			++i;
31 		}
32 	}
33 
34 	return NULL;
35 }
36 
37 #if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC)
38 /*
39  * Search card topology and register HDMI PCM related controls
40  * to codec driver.
41  */
42 int hda_dsp_hdmi_build_controls(struct snd_soc_card *card,
43 				struct snd_soc_component *comp)
44 {
45 	struct hdac_hda_priv *hda_pvt;
46 	struct hda_codec *hcodec;
47 	struct snd_pcm *spcm;
48 	struct hda_pcm *hpcm;
49 	int err = 0, i = 0;
50 
51 	if (!comp)
52 		return -EINVAL;
53 
54 	hda_pvt = snd_soc_component_get_drvdata(comp);
55 	hcodec = &hda_pvt->codec;
56 
57 	list_for_each_entry(hpcm, &hcodec->pcm_list_head, list) {
58 		spcm = hda_dsp_hdmi_pcm_handle(card, i);
59 		if (spcm) {
60 			hpcm->pcm = spcm;
61 			hpcm->device = spcm->device;
62 			dev_dbg(card->dev,
63 				"%s: mapping HDMI converter %d to PCM %d (%p)\n",
64 				__func__, i, hpcm->device, spcm);
65 		} else {
66 			hpcm->pcm = 0;
67 			hpcm->device = SNDRV_PCM_INVALID_DEVICE;
68 			dev_warn(card->dev,
69 				 "%s: no PCM in topology for HDMI converter %d\n\n",
70 				 __func__, i);
71 		}
72 		i++;
73 	}
74 	snd_hdac_display_power(hcodec->core.bus,
75 			       HDA_CODEC_IDX_CONTROLLER, true);
76 	err = snd_hda_codec_build_controls(hcodec);
77 	if (err < 0)
78 		dev_err(card->dev, "unable to create controls %d\n", err);
79 	snd_hdac_display_power(hcodec->core.bus,
80 			       HDA_CODEC_IDX_CONTROLLER, false);
81 
82 	return err;
83 }
84 
85 #endif
86