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ALSA: hda: add polling mode in snd_hdac_bus_get_response

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Polling mode is useful if a machine somehow missed an expected IRQ.

Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Bard Liao 2019-05-27 00:58:35 +08:00 committed by Takashi Iwai
parent 8af42130b5
commit 5e13cf6cd6
1 changed files with 2 additions and 0 deletions
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sound/hda/hdac_controller.c
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@ -239,6 +239,8 @@ int snd_hdac_bus_get_response(struct hdac_bus *bus, unsigned int addr,
timeout = jiffies + msecs_to_jiffies(1000);
for (loopcounter = 0;; loopcounter++) {
if (bus->polling_mode)
snd_hdac_bus_update_rirb(bus);
spin_lock_irq(&bus->reg_lock);
if (!bus->rirb.cmds[addr]) {
if (res)