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