ALSA: hda - Add a new function to seek for a codec ID
Gateway notebooks have their ID inside codec vendor ID, not at PCI ID. Due to that, model auto-detection were not possible with the standard seek method. This is what is found at lspci -vnn: 00:14.2 Audio device [0403]: ATI Technologies Inc SB450 HDA Audio [1002:437b] (rev 01) Subsystem: ATI Technologies Inc SB450 HDA Audio [1002:437b] Yet, autodetection is possible, since the codec properly reflects the vendor at the Subsystem ID: $ cat /proc/asound/card0/codec#0 |head -4 Codec: SigmaTel STAC9250 Address: 0 Vendor Id: 0x83847634 Subsystem Id: 0x107b0367 This patch adds a new autodetection function that seeks for codec subsystem ID. Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
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@ -2704,6 +2704,67 @@ int snd_hda_check_board_config(struct hda_codec *codec,
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}
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EXPORT_SYMBOL_HDA(snd_hda_check_board_config);
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/**
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* snd_hda_check_board_codec_sid_config - compare the current codec
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subsystem ID with the
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config table
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This is important for Gateway notebooks with SB450 HDA Audio
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where the vendor ID of the PCI device is:
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ATI Technologies Inc SB450 HDA Audio [1002:437b]
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and the vendor/subvendor are found only at the codec.
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* @codec: the HDA codec
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* @num_configs: number of config enums
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* @models: array of model name strings
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* @tbl: configuration table, terminated by null entries
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*
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* Compares the modelname or PCI subsystem id of the current codec with the
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* given configuration table. If a matching entry is found, returns its
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* config value (supposed to be 0 or positive).
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*
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* If no entries are matching, the function returns a negative value.
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*/
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int snd_hda_check_board_codec_sid_config(struct hda_codec *codec,
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int num_configs, const char **models,
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const struct snd_pci_quirk *tbl)
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{
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const struct snd_pci_quirk *q;
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/* Search for codec ID */
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for (q = tbl; q->subvendor; q++) {
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unsigned long vendorid = (q->subdevice) | (q->subvendor << 16);
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if (vendorid == codec->subsystem_id)
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break;
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}
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if (!q->subvendor)
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return -1;
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tbl = q;
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if (tbl->value >= 0 && tbl->value < num_configs) {
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#ifdef CONFIG_SND_DEBUG_DETECT
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char tmp[10];
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const char *model = NULL;
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if (models)
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model = models[tbl->value];
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if (!model) {
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sprintf(tmp, "#%d", tbl->value);
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model = tmp;
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}
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snd_printdd(KERN_INFO "hda_codec: model '%s' is selected "
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"for config %x:%x (%s)\n",
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model, tbl->subvendor, tbl->subdevice,
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(tbl->name ? tbl->name : "Unknown device"));
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#endif
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return tbl->value;
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}
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return -1;
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}
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EXPORT_SYMBOL_HDA(snd_hda_check_board_codec_sid_config);
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/**
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* snd_hda_add_new_ctls - create controls from the array
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* @codec: the HDA codec
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@ -296,6 +296,9 @@ void snd_print_pcm_bits(int pcm, char *buf, int buflen);
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int snd_hda_check_board_config(struct hda_codec *codec, int num_configs,
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const char **modelnames,
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const struct snd_pci_quirk *pci_list);
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int snd_hda_check_board_codec_sid_config(struct hda_codec *codec,
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int num_configs, const char **models,
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const struct snd_pci_quirk *tbl);
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int snd_hda_add_new_ctls(struct hda_codec *codec,
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struct snd_kcontrol_new *knew);
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