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[ALSA] hda-intel - Switch to polling mode for CORB/RIRB communication

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Automatically switch to polling mode for CORB/RIRB communication
if the irq-driven mode seems not working well.  If the polling
mode still doesn't work, switch to single_cmd mode as fallback.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
This commit is contained in:
Takashi Iwai 2006-08-21 17:57:44 +02:00 committed by Jaroslav Kysela
parent 81d3dbde76
commit e96224ae97
1 changed files with 17 additions and 1 deletions
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18
sound/pci/hda/hda_intel.c
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@ -332,6 +332,7 @@ struct azx {
int position_fix; int position_fix;
unsigned int initialized: 1; unsigned int initialized: 1;
unsigned int single_cmd: 1; unsigned int single_cmd: 1;
unsigned int polling_mode: 1;
}; };
/* driver types */ /* driver types */
@ -518,8 +519,23 @@ static unsigned int azx_rirb_get_response(struct hda_codec *codec)
struct azx *chip = codec->bus->private_data; struct azx *chip = codec->bus->private_data;
int timeout = 50; int timeout = 50;
while (chip->rirb.cmds) { for (;;) {
if (chip->polling_mode) {
spin_lock_irq(&chip->reg_lock);
azx_update_rirb(chip);
spin_unlock_irq(&chip->reg_lock);
}
if (! chip->rirb.cmds)
break;
if (! --timeout) { if (! --timeout) {
if (! chip->polling_mode) {
snd_printk(KERN_WARNING "hda_intel: "
"azx_get_response timeout, "
"switching to polling mode...\n");
chip->polling_mode = 1;
timeout = 50;
continue;
}
snd_printk(KERN_ERR snd_printk(KERN_ERR
"hda_intel: azx_get_response timeout, " "hda_intel: azx_get_response timeout, "
"switching to single_cmd mode...\n"); "switching to single_cmd mode...\n");