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

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>

1 files changed, 17 insertions, 1 deletions

diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index 79d63c99f092..ce75e07aaa2a 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -332,6 +332,7 @@ struct azx {
         int position_fix;
         unsigned int initialized: 1;
         unsigned int single_cmd: 1;
+        unsigned int polling_mode: 1;
 };
 
 /* driver types */
@@ -518,8 +519,23 @@ static unsigned int azx_rirb_get_response(struct hda_codec *codec)
         struct azx *chip = codec->bus->private_data;
         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 (! 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
                                    "hda_intel: azx_get_response timeout, "
                                    "switching to single_cmd mode...\n");