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[ALSA] HDA: Enable chipset gcap usage

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This patch removes hardcoded values for the number of streams supported
by the southbridge in most chipsets, and reads these values from the
chipset directly.  Most systems are hardwired for 4 streams in each
direction, but newer chipsets change that capability.

Signed-off-by: Tobin Davis <tdavis@dsl-only.net>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Tobin Davis 2008-01-15 11:23:55 +01:00 committed by Jaroslav Kysela
parent fb920b7d8b
commit bcd7200394
1 changed files with 36 additions and 20 deletions
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56
sound/pci/hda/hda_intel.c
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@ -1708,12 +1708,13 @@ static int __devinit azx_create(struct snd_card *card, struct pci_dev *pci,
{
struct azx *chip;
int err;
unsigned short gcap;
static struct snd_device_ops ops = {
.dev_free = azx_dev_free,
};
*rchip = NULL;
err = pci_enable_device(pci);
if (err < 0)
return err;
@ -1775,25 +1776,40 @@ static int __devinit azx_create(struct snd_card *card, struct pci_dev *pci,
pci_set_master(pci);
synchronize_irq(chip->irq);
switch (chip->driver_type) {
case AZX_DRIVER_ULI:
chip->playback_streams = ULI_NUM_PLAYBACK;
chip->capture_streams = ULI_NUM_CAPTURE;
chip->playback_index_offset = ULI_PLAYBACK_INDEX;
chip->capture_index_offset = ULI_CAPTURE_INDEX;
break;
case AZX_DRIVER_ATIHDMI:
chip->playback_streams = ATIHDMI_NUM_PLAYBACK;
chip->capture_streams = ATIHDMI_NUM_CAPTURE;
chip->playback_index_offset = ATIHDMI_PLAYBACK_INDEX;
chip->capture_index_offset = ATIHDMI_CAPTURE_INDEX;
break;
default:
chip->playback_streams = ICH6_NUM_PLAYBACK;
chip->capture_streams = ICH6_NUM_CAPTURE;
chip->playback_index_offset = ICH6_PLAYBACK_INDEX;
chip->capture_index_offset = ICH6_CAPTURE_INDEX;
break;
gcap = azx_readw(chip, GCAP);
snd_printdd("chipset global capabilities = 0x%x\n", gcap);
if (gcap) {
/* read number of streams from GCAP register instead of using
* hardcoded value
*/
chip->playback_streams = (gcap & (0xF << 12)) >> 12;
chip->capture_streams = (gcap & (0xF << 8)) >> 8;
chip->playback_index_offset = (gcap & (0xF << 12)) >> 12;
chip->capture_index_offset = 0;
} else {
/* gcap didn't give any info, switching to old method */
switch (chip->driver_type) {
case AZX_DRIVER_ULI:
chip->playback_streams = ULI_NUM_PLAYBACK;
chip->capture_streams = ULI_NUM_CAPTURE;
chip->playback_index_offset = ULI_PLAYBACK_INDEX;
chip->capture_index_offset = ULI_CAPTURE_INDEX;
break;
case AZX_DRIVER_ATIHDMI:
chip->playback_streams = ATIHDMI_NUM_PLAYBACK;
chip->capture_streams = ATIHDMI_NUM_CAPTURE;
chip->playback_index_offset = ATIHDMI_PLAYBACK_INDEX;
chip->capture_index_offset = ATIHDMI_CAPTURE_INDEX;
break;
default:
chip->playback_streams = ICH6_NUM_PLAYBACK;
chip->capture_streams = ICH6_NUM_CAPTURE;
chip->playback_index_offset = ICH6_PLAYBACK_INDEX;
chip->capture_index_offset = ICH6_CAPTURE_INDEX;
break;
}
}
chip->num_streams = chip->playback_streams + chip->capture_streams;
chip->azx_dev = kcalloc(chip->num_streams, sizeof(*chip->azx_dev),