diff options
Diffstat (limited to 'sound/pci/hda/hda_codec.c')
| -rw-r--r-- | sound/pci/hda/hda_codec.c | 42 |
1 files changed, 37 insertions, 5 deletions
diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c index 26c420de91c3..7f8502388a82 100644 --- a/sound/pci/hda/hda_codec.c +++ b/sound/pci/hda/hda_codec.c @@ -411,11 +411,8 @@ static int _hda_get_connections(struct hda_codec *codec, hda_nid_t nid, wcaps = get_wcaps(codec, nid); if (!(wcaps & AC_WCAP_CONN_LIST) && - get_wcaps_type(wcaps) != AC_WID_VOL_KNB) { - snd_printk(KERN_WARNING "hda_codec: " - "connection list not available for 0x%x\n", nid); - return -EINVAL; - } + get_wcaps_type(wcaps) != AC_WID_VOL_KNB) + return 0; parm = snd_hda_param_read(codec, nid, AC_PAR_CONNLIST_LEN); if (parm & AC_CLIST_LONG) { @@ -506,6 +503,41 @@ static bool add_conn_list(struct snd_array *array, hda_nid_t nid) } /** + * snd_hda_get_conn_index - get the connection index of the given NID + * @codec: the HDA codec + * @mux: NID containing the list + * @nid: NID to select + * @recursive: 1 when searching NID recursively, otherwise 0 + * + * Parses the connection list of the widget @mux and checks whether the + * widget @nid is present. If it is, return the connection index. + * Otherwise it returns -1. + */ +int snd_hda_get_conn_index(struct hda_codec *codec, hda_nid_t mux, + hda_nid_t nid, int recursive) +{ + hda_nid_t conn[HDA_MAX_NUM_INPUTS]; + int i, nums; + + nums = snd_hda_get_connections(codec, mux, conn, ARRAY_SIZE(conn)); + for (i = 0; i < nums; i++) + if (conn[i] == nid) + return i; + if (!recursive) + return -1; + if (recursive > 5) { + snd_printd("hda_codec: too deep connection for 0x%x\n", nid); + return -1; + } + recursive++; + for (i = 0; i < nums; i++) + if (snd_hda_get_conn_index(codec, conn[i], nid, recursive) >= 0) + return i; + return -1; +} +EXPORT_SYMBOL_HDA(snd_hda_get_conn_index); + +/** * snd_hda_queue_unsol_event - add an unsolicited event to queue * @bus: the BUS * @res: unsolicited event (lower 32bit of RIRB entry) |
