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[ALSA] hda-intel - Probe additional slots only if necessary 

Probing the codec slots on ATI controller causes problems on some
devices like Acer laptops.  On these devices, reading from codec
slot 3 results in the communication failure with the codec chip.
Meanwhile, some laptops (e.g. Gateway) have the codec connection
only on slot 3, and probing this slot is mandatory for them.
The patch improves the probing robustness.  The additional slots
are now checked only when no codecs are found in the primary three
slots.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
This commit is contained in:
Takashi Iwai 2007-03-21 15:14:35 +01:00 committed by Jaroslav Kysela
parent 4505179c73
commit 19a982b694
1 changed files with 14 additions and 2 deletions
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16
sound/pci/hda/hda_intel.c
View File

@ -198,6 +198,7 @@ enum { SDI0, SDI1, SDI2, SDI3, SDO0, SDO1, SDO2, SDO3 };
#define RIRB_INT_MASK 0x05
/* STATESTS int mask: SD2,SD1,SD0 */
#define AZX_MAX_CODECS 3
#define STATESTS_INT_MASK 0x07
/* SD_CTL bits */
@ -991,7 +992,7 @@ static int __devinit azx_codec_create(struct azx *chip, const char *model)
return err;
codecs = 0;
for (c = 0; c < azx_max_codecs[chip->driver_type]; c++) {
for (c = 0; c < AZX_MAX_CODECS; c++) {
if ((chip->codec_mask & (1 << c)) & probe_mask) {
err = snd_hda_codec_new(chip->bus, c, NULL);
if (err < 0)
@ -999,7 +1000,18 @@ static int __devinit azx_codec_create(struct azx *chip, const char *model)
codecs++;
}
}
if (! codecs) {
if (!codecs) {
/* probe additional slots if no codec is found */
for (; c < azx_max_codecs[chip->driver_type]; c++) {
if ((chip->codec_mask & (1 << c)) & probe_mask) {
err = snd_hda_codec_new(chip->bus, c, NULL);
if (err < 0)
continue;
codecs++;
}
}
}
if (!codecs) {
snd_printk(KERN_ERR SFX "no codecs initialized\n");
return -ENXIO;
}