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Commit f5172a7e authored by Takashi Iwai's avatar Takashi Iwai
Browse files

ALSA: hda - Check the existing path in snd_hda_add_new_path() 



If the requested path has been already added, return the existing path
instance instead of adding a duplicated instance.

Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 1e0b5286

sound/pci/hda/hda_generic.c

+24 −7
Original line number Diff line number Diff line
@@ -116,11 +116,9 @@ EXPORT_SYMBOL_HDA(snd_hda_gen_spec_free); 
 * parsing paths

 */



/* get the path between the given NIDs;

 * passing 0 to either @pin or @dac behaves as a wildcard

 */

struct nid_path *snd_hda_get_nid_path(struct hda_codec *codec,

				      hda_nid_t from_nid, hda_nid_t to_nid)

static struct nid_path *get_nid_path(struct hda_codec *codec,

				     hda_nid_t from_nid, hda_nid_t to_nid,

				     int with_aa_mix)

{

	struct hda_gen_spec *spec = codec->spec;

	int i;
@@ -130,11 +128,23 @@ struct nid_path *snd_hda_get_nid_path(struct hda_codec *codec, 
		if (path->depth <= 0)

			continue;

		if ((!from_nid || path->path[0] == from_nid) &&

		    (!to_nid || path->path[path->depth - 1] == to_nid))

		    (!to_nid || path->path[path->depth - 1] == to_nid)) {

			if (with_aa_mix == HDA_PARSE_ALL ||

			    path->with_aa_mix == with_aa_mix)

				return path;

		}

	}

	return NULL;

}



/* get the path between the given NIDs;

 * passing 0 to either @pin or @dac behaves as a wildcard

 */

struct nid_path *snd_hda_get_nid_path(struct hda_codec *codec,

				      hda_nid_t from_nid, hda_nid_t to_nid)

{

	return get_nid_path(codec, from_nid, to_nid, HDA_PARSE_ALL);

}

EXPORT_SYMBOL_HDA(snd_hda_get_nid_path);



/* check whether the given DAC is already found in any existing paths */
@@ -248,6 +258,8 @@ static bool __parse_nid_path(struct hda_codec *codec, 


 found:

	path->path[path->depth] = conn[i];

	if (conn[i] == spec->mixer_nid)

		path->with_aa_mix = true;

	path->idx[path->depth + 1] = i;

	if (nums > 1 && get_wcaps_type(get_wcaps(codec, to_nid)) != AC_WID_AUD_MIX)

		path->multi[path->depth + 1] = 1;
@@ -290,6 +302,11 @@ snd_hda_add_new_path(struct hda_codec *codec, hda_nid_t from_nid, 
	if (from_nid && to_nid && !is_reachable_path(codec, from_nid, to_nid))

		return NULL;



	/* check whether the path has been already added */

	path = get_nid_path(codec, from_nid, to_nid, with_aa_mix);

	if (path)

		return path;



	path = snd_array_new(&spec->paths);

	if (!path)

		return NULL;

sound/pci/hda/hda_generic.h

+1 −0
Original line number Diff line number Diff line
@@ -53,6 +53,7 @@ struct nid_path { 
	unsigned char multi[MAX_NID_PATH_DEPTH];

	unsigned int ctls[NID_PATH_NUM_CTLS]; /* NID_PATH_XXX_CTL */

	bool active;

	bool with_aa_mix;

};



/* mic/line-in auto switching entry */