Commit f0639272 authored by Takashi Iwai's avatar Takashi Iwai
Browse files

ALSA: hda - Bind with HDMI codec parser automatically 



If a codec contains only the digital outputs, it's very likely a
HDMI/DP codec, which isn't supported by the generic parser but via
HDMI codec parser code.  Detect such a case and bind with the proper
parser object if available.

Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent b21bdd0d

sound/pci/hda/hda_codec.c

+27 −0
Original line number Diff line number Diff line
@@ -1557,6 +1557,31 @@ int snd_hda_codec_update_widgets(struct hda_codec *codec) 
EXPORT_SYMBOL_HDA(snd_hda_codec_update_widgets);





#ifdef CONFIG_SND_HDA_CODEC_HDMI

/* if all audio out widgets are digital, let's assume the codec as a HDMI/DP */

static bool is_likely_hdmi_codec(struct hda_codec *codec)

{

	hda_nid_t nid = codec->start_nid;

	int i;



	for (i = 0; i < codec->num_nodes; i++, nid++) {

		unsigned int wcaps = get_wcaps(codec, nid);

		switch (get_wcaps_type(wcaps)) {

		case AC_WID_AUD_IN:

			return false; /* HDMI parser supports only HDMI out */

		case AC_WID_AUD_OUT:

			if (!(wcaps & AC_WCAP_DIGITAL))

				return false;

			break;

		}

	}

	return true;

}

#else

/* no HDMI codec parser support */

#define is_likely_hdmi_codec(codec)	false

#endif /* CONFIG_SND_HDA_CODEC_HDMI */



/**

 * snd_hda_codec_configure - (Re-)configure the HD-audio codec

 * @codec: the HDA codec
@@ -1582,6 +1607,8 @@ int snd_hda_codec_configure(struct hda_codec *codec) 
		patch = codec->preset->patch;

	if (!patch) {

		unload_parser(codec); /* to be sure */

		if (is_likely_hdmi_codec(codec))

			patch = load_parser(codec, snd_hda_parse_hdmi_codec);

#ifdef CONFIG_SND_HDA_GENERIC

		if (!patch)

			patch = load_parser(codec, snd_hda_parse_generic_codec);

sound/pci/hda/hda_local.h

+1 −0
Original line number Diff line number Diff line
@@ -353,6 +353,7 @@ int snd_hda_multi_out_analog_cleanup(struct hda_codec *codec, 
 * generic codec parser

 */

int snd_hda_parse_generic_codec(struct hda_codec *codec);

int snd_hda_parse_hdmi_codec(struct hda_codec *codec);



/*

 * generic proc interface

sound/pci/hda/patch_hdmi.c

+9 −0
Original line number Diff line number Diff line
@@ -3213,6 +3213,15 @@ static int patch_via_hdmi(struct hda_codec *codec) 
	return patch_simple_hdmi(codec, VIAHDMI_CVT_NID, VIAHDMI_PIN_NID);

}



/*

 * called from hda_codec.c for generic HDMI support

 */

int snd_hda_parse_hdmi_codec(struct hda_codec *codec)

{

	return patch_generic_hdmi(codec);

}

EXPORT_SYMBOL_HDA(snd_hda_parse_hdmi_codec);



/*

 * patch entries

 */

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