Commit 2eda3445 authored by Mauro Carvalho Chehab's avatar Mauro Carvalho Chehab Committed by Takashi Iwai
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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: default avatarMauro Carvalho Chehab <mchehab@infradead.org>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent ff7a3267

sound/pci/hda/hda_codec.c

+61 −0
Original line number Diff line number Diff line
@@ -2704,6 +2704,67 @@ int snd_hda_check_board_config(struct hda_codec *codec, 
}

EXPORT_SYMBOL_HDA(snd_hda_check_board_config);



/**

 * snd_hda_check_board_codec_sid_config - compare the current codec

				          subsystem ID with the

					  config table



	   This is important for Gateway notebooks with SB450 HDA Audio

	   where the vendor ID of the PCI device is:

		ATI Technologies Inc SB450 HDA Audio [1002:437b]

	   and the vendor/subvendor are found only at the codec.



 * @codec: the HDA codec

 * @num_configs: number of config enums

 * @models: array of model name strings

 * @tbl: configuration table, terminated by null entries

 *

 * Compares the modelname or PCI subsystem id of the current codec with the

 * given configuration table.  If a matching entry is found, returns its

 * config value (supposed to be 0 or positive).

 *

 * If no entries are matching, the function returns a negative value.

 */

int snd_hda_check_board_codec_sid_config(struct hda_codec *codec,

			       int num_configs, const char **models,

			       const struct snd_pci_quirk *tbl)

{

	const struct snd_pci_quirk *q;



	/* Search for codec ID */

	for (q = tbl; q->subvendor; q++) {

		unsigned long vendorid = (q->subdevice) | (q->subvendor << 16);



		if (vendorid == codec->subsystem_id)

			break;

	}



	if (!q->subvendor)

		return -1;



	tbl = q;



	if (tbl->value >= 0 && tbl->value < num_configs) {

#ifdef CONFIG_SND_DEBUG_DETECT

		char tmp[10];

		const char *model = NULL;

		if (models)

			model = models[tbl->value];

		if (!model) {

			sprintf(tmp, "#%d", tbl->value);

			model = tmp;

		}

		snd_printdd(KERN_INFO "hda_codec: model '%s' is selected "

			    "for config %x:%x (%s)\n",

			    model, tbl->subvendor, tbl->subdevice,

			    (tbl->name ? tbl->name : "Unknown device"));

#endif

		return tbl->value;

	}

	return -1;

}

EXPORT_SYMBOL_HDA(snd_hda_check_board_codec_sid_config);



/**

 * snd_hda_add_new_ctls - create controls from the array

 * @codec: the HDA codec

sound/pci/hda/hda_local.h

+3 −0
Original line number Diff line number Diff line
@@ -296,6 +296,9 @@ void snd_print_pcm_bits(int pcm, char *buf, int buflen); 
int snd_hda_check_board_config(struct hda_codec *codec, int num_configs,

			       const char **modelnames,

			       const struct snd_pci_quirk *pci_list);

int snd_hda_check_board_codec_sid_config(struct hda_codec *codec,

                               int num_configs, const char **models,

                               const struct snd_pci_quirk *tbl);

int snd_hda_add_new_ctls(struct hda_codec *codec,

			 struct snd_kcontrol_new *knew);

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