From 19a982b69442d39b3bb6e710677320182480576b Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Wed, 21 Mar 2007 15:14:35 +0100 Subject: [PATCH] [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 Signed-off-by: Jaroslav Kysela --- sound/pci/hda/hda_intel.c | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-) diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c index 517a8d7bf3..5e478b917a 100644 --- a/sound/pci/hda/hda_intel.c +++ b/sound/pci/hda/hda_intel.c @@ -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; } -- 2.39.5