diff options
| author | Jaroslav Kysela <perex@perex.cz> | 2010-03-26 10:28:46 +0100 |
|---|---|---|
| committer | Jaroslav Kysela <perex@perex.cz> | 2010-03-26 10:37:39 +0100 |
| commit | cd508fe58b07499403e806b558c7f15c90442292 (patch) | |
| tree | 5ec4c40b7c7b84595c65f5f9dda96e1a01eacc2b /sound/pci/hda/hda_intel.c | |
| parent | 306ff3e473a970f88680e8355c0900fcab0357e2 (diff) | |
ALSA: hda-intel - add special 'hwio' model to bypass initialization
Using the 'model=hwio' option, the driver bypasses any codec
initialization and the reset procedure for codecs is also
bypassed. This mode is usefull to enable direct access using
hwdep interface (using hdaverb or hda-analyzer tools) and
retain codec setup from BIOS.
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Diffstat (limited to 'sound/pci/hda/hda_intel.c')
| -rw-r--r-- | sound/pci/hda/hda_intel.c | 20 |
1 files changed, 12 insertions, 8 deletions
diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c index 8b2915631cc..8d477613bcc 100644 --- a/sound/pci/hda/hda_intel.c +++ b/sound/pci/hda/hda_intel.c @@ -858,10 +858,13 @@ static void azx_power_notify(struct hda_bus *bus); #endif /* reset codec link */ -static int azx_reset(struct azx *chip) +static int azx_reset(struct azx *chip, int full_reset) { int count; + if (!full_reset) + goto __skip; + /* clear STATESTS */ azx_writeb(chip, STATESTS, STATESTS_INT_MASK); @@ -887,6 +890,7 @@ static int azx_reset(struct azx *chip) /* Brent Chartrand said to wait >= 540us for codecs to initialize */ msleep(1); + __skip: /* check to see if controller is ready */ if (!azx_readb(chip, GCTL)) { snd_printd(SFX "azx_reset: controller not ready!\n"); @@ -998,13 +1002,13 @@ static void azx_stream_stop(struct azx *chip, struct azx_dev *azx_dev) /* * reset and start the controller registers */ -static void azx_init_chip(struct azx *chip) +static void azx_init_chip(struct azx *chip, int full_reset) { if (chip->initialized) return; /* reset controller */ - azx_reset(chip); + azx_reset(chip, full_reset); /* initialize interrupts */ azx_int_clear(chip); @@ -1348,7 +1352,7 @@ static void azx_bus_reset(struct hda_bus *bus) bus->in_reset = 1; azx_stop_chip(chip); - azx_init_chip(chip); + azx_init_chip(chip, 1); #ifdef CONFIG_PM if (chip->initialized) { int i; @@ -1422,7 +1426,7 @@ static int __devinit azx_codec_create(struct azx *chip, const char *model) * get back to the sanity state. */ azx_stop_chip(chip); - azx_init_chip(chip); + azx_init_chip(chip, 1); } } } @@ -2112,7 +2116,7 @@ static void azx_power_notify(struct hda_bus *bus) } } if (power_on) - azx_init_chip(chip); + azx_init_chip(chip, 1); else if (chip->running && power_save_controller && !bus->power_keep_link_on) azx_stop_chip(chip); @@ -2182,7 +2186,7 @@ static int azx_resume(struct pci_dev *pci) azx_init_pci(chip); if (snd_hda_codecs_inuse(chip->bus)) - azx_init_chip(chip); + azx_init_chip(chip, 1); snd_hda_resume(chip->bus); snd_power_change_state(card, SNDRV_CTL_POWER_D0); @@ -2573,7 +2577,7 @@ static int __devinit azx_create(struct snd_card *card, struct pci_dev *pci, /* initialize chip */ azx_init_pci(chip); - azx_init_chip(chip); + azx_init_chip(chip, model[dev] == NULL || strcmp(model[dev], "hwio")); /* codec detection */ if (!chip->codec_mask) { |