1 // SPDX-License-Identifier: GPL-2.0-only
2 // Copyright (c) 2020 Intel Corporation
3 
4 /*
5  *  sof_sdw_hdmi - Helpers to handle HDMI from generic machine driver
6  */
7 
8 #include <linux/device.h>
9 #include <linux/errno.h>
10 #include <linux/kernel.h>
11 #include <linux/list.h>
12 #include <sound/soc.h>
13 #include <sound/soc-acpi.h>
14 #include <sound/jack.h>
15 #include "sof_sdw_common.h"
16 #include "hda_dsp_common.h"
17 
18 struct hdmi_pcm {
19 	struct list_head head;
20 	struct snd_soc_dai *codec_dai;
21 	int device;
22 };
23 
24 int sof_sdw_hdmi_init(struct snd_soc_pcm_runtime *rtd)
25 {
26 	struct mc_private *ctx = snd_soc_card_get_drvdata(rtd->card);
27 	struct snd_soc_dai *dai = asoc_rtd_to_codec(rtd, 0);
28 	struct hdmi_pcm *pcm;
29 
30 	pcm = devm_kzalloc(rtd->card->dev, sizeof(*pcm), GFP_KERNEL);
31 	if (!pcm)
32 		return -ENOMEM;
33 
34 	/* dai_link id is 1:1 mapped to the PCM device */
35 	pcm->device = rtd->dai_link->id;
36 	pcm->codec_dai = dai;
37 
38 	list_add_tail(&pcm->head, &ctx->hdmi_pcm_list);
39 
40 	return 0;
41 }
42 
43 #define NAME_SIZE	32
44 int sof_sdw_hdmi_card_late_probe(struct snd_soc_card *card)
45 {
46 	struct mc_private *ctx = snd_soc_card_get_drvdata(card);
47 	struct hdmi_pcm *pcm;
48 	struct snd_soc_component *component = NULL;
49 
50 	if (!ctx->idisp_codec)
51 		return 0;
52 
53 	if (list_empty(&ctx->hdmi_pcm_list))
54 		return -EINVAL;
55 
56 	pcm = list_first_entry(&ctx->hdmi_pcm_list, struct hdmi_pcm,
57 			       head);
58 	component = pcm->codec_dai->component;
59 
60 	return hda_dsp_hdmi_build_controls(card, component);
61 }
62