1 // SPDX-License-Identifier: GPL-2.0-or-later
29  * 	- HDMI audio InfoFrame (source to sink)
30  * 	- CEA E-EDID Extension (sink to source)
33 static unsigned int hdmi_get_eld_data(struct hda_codec *codec, hda_nid_t nid,  in hdmi_get_eld_data()  argument
38 	val = snd_hda_codec_read(codec, nid, 0,  in hdmi_get_eld_data()
41 	codec_info(codec, "HDMI: ELD data byte %d: 0x%x\n", byte_index, val);  in hdmi_get_eld_data()
46 int snd_hdmi_get_eld_size(struct hda_codec *codec, hda_nid_t nid)  in snd_hdmi_get_eld_size()  argument
48 	return snd_hda_codec_read(codec, nid, 0, AC_VERB_GET_HDMI_DIP_SIZE,  in snd_hdmi_get_eld_size()
52 int snd_hdmi_get_eld(struct hda_codec *codec, hda_nid_t nid,  in snd_hdmi_get_eld()  argument
64 	size = snd_hdmi_get_eld_size(codec, nid);  in snd_hdmi_get_eld()
66 		/* wfg: workaround for ASUS P5E-VM HDMI board */  in snd_hdmi_get_eld()
67 		codec_info(codec, "HDMI: ELD buf size is 0, force 128\n");  in snd_hdmi_get_eld()
71 		codec_info(codec, "HDMI: invalid ELD buf size %d\n", size);  in snd_hdmi_get_eld()
72 		return -ERANGE;  in snd_hdmi_get_eld()
77 		unsigned int val = hdmi_get_eld_data(codec, nid, i);  in snd_hdmi_get_eld()
83 			codec_info(codec, "HDMI: invalid ELD data byte %d\n", i);  in snd_hdmi_get_eld()
84 			ret = -EINVAL;  in snd_hdmi_get_eld()
91 		 * to return non-zero ELD data, even when the graphics driver  in snd_hdmi_get_eld()
95 			codec_dbg(codec, "HDMI: 0 ELD data\n");  in snd_hdmi_get_eld()
96 			ret = -EINVAL;  in snd_hdmi_get_eld()
112 	snd_iprintf(buffer, "monitor_present\t\t%d\n", eld->monitor_present);  in snd_hdmi_print_eld_info()
113 	snd_iprintf(buffer, "eld_valid\t\t%d\n", eld->eld_valid);  in snd_hdmi_print_eld_info()
118 	if (!eld->eld_valid)  in snd_hdmi_print_eld_info()
121 	snd_print_eld_info(&eld->info, buffer);  in snd_hdmi_print_eld_info()
127 	struct snd_parsed_hdmi_eld *e = &eld->info;  in snd_hdmi_write_eld_info()
143 			eld->monitor_present = val;  in snd_hdmi_write_eld_info()
145 			eld->eld_valid = val;  in snd_hdmi_write_eld_info()
147 			e->conn_type = val;  in snd_hdmi_write_eld_info()
149 			e->port_id = val;  in snd_hdmi_write_eld_info()
151 			e->support_hdcp = val;  in snd_hdmi_write_eld_info()
153 			e->support_ai = val;  in snd_hdmi_write_eld_info()
155 			e->aud_synch_delay = val;  in snd_hdmi_write_eld_info()
157 			e->spk_alloc = val;  in snd_hdmi_write_eld_info()
159 			e->sad_count = val;  in snd_hdmi_write_eld_info()
162 			n = name[3] - '0';  in snd_hdmi_write_eld_info()
165 				n = 10 * n + name[4] - '0';  in snd_hdmi_write_eld_info()
170 				e->sad[n].format = val;  in snd_hdmi_write_eld_info()
172 				e->sad[n].channels = val;  in snd_hdmi_write_eld_info()
174 				e->sad[n].rates = val;  in snd_hdmi_write_eld_info()
176 				e->sad[n].sample_bits = val;  in snd_hdmi_write_eld_info()
178 				e->sad[n].max_bitrate = val;  in snd_hdmi_write_eld_info()
180 				e->sad[n].profile = val;  in snd_hdmi_write_eld_info()
181 			if (n >= e->sad_count)  in snd_hdmi_write_eld_info()
182 				e->sad_count = n + 1;  in snd_hdmi_write_eld_info()
206 	for (i = 0; i < e->sad_count; i++) {  in snd_hdmi_eld_update_pcm_info()
207 		struct snd_cea_sad *a = &e->sad[i];  in snd_hdmi_eld_update_pcm_info()
208 		rates |= a->rates;  in snd_hdmi_eld_update_pcm_info()
209 		if (a->channels > channels_max)  in snd_hdmi_eld_update_pcm_info()
210 			channels_max = a->channels;  in snd_hdmi_eld_update_pcm_info()
211 		if (a->format == AUDIO_CODING_TYPE_LPCM) {  in snd_hdmi_eld_update_pcm_info()
212 			if (a->sample_bits & ELD_PCM_BITS_20) {  in snd_hdmi_eld_update_pcm_info()
217 			if (a->sample_bits & ELD_PCM_BITS_24) {  in snd_hdmi_eld_update_pcm_info()
225 	/* restrict the parameters by the values the codec provides */  in snd_hdmi_eld_update_pcm_info()
226 	hinfo->rates &= rates;  in snd_hdmi_eld_update_pcm_info()
227 	hinfo->formats &= formats;  in snd_hdmi_eld_update_pcm_info()
228 	hinfo->maxbps = min(hinfo->maxbps, maxbps);  in snd_hdmi_eld_update_pcm_info()
229 	hinfo->channels_max = min(hinfo->channels_max, channels_max);  in snd_hdmi_eld_update_pcm_info()