On Wed, 16 Dec 2020 13:47:24 +0100, Kai-Heng Feng wrote:
Similar to commit 9479e75fca37 ("ALSA: hda: Keep the controller initialization even if no codecs found"), when codec probe fails, it doesn't enable runtime suspend, and can prevent graphics card from getting powered down: [ 4.280991] snd_hda_intel 0000:01:00.1: no codecs initialized
$ cat /sys/bus/pci/devices/0000:01:00.1/power/runtime_status active
So mark there's no codec and continue probing to let runtime PM to work.
BugLink: https://bugs.launchpad.net/bugs/1907212 Signed-off-by: Kai-Heng Feng kai.heng.feng@canonical.com
Hm, but if the probe fails, doesn't it mean something really wrong? IOW, how does this situation happen?
The usual no-codec state is for the devices that have a bogus HD-audio bus remaining while codecs aren't hooked or disabled by BIOS. For that, it makes to leave the controller driver and let it idle. But if you get really an error, it's something to fix there, not to just ignore in general.
thanks,
Takashi
sound/pci/hda/hda_intel.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c index 6852668f1bcb..872a703dee43 100644 --- a/sound/pci/hda/hda_intel.c +++ b/sound/pci/hda/hda_intel.c @@ -2328,7 +2328,7 @@ static int azx_probe_continue(struct azx *chip) if (bus->codec_mask) { err = azx_probe_codecs(chip, azx_max_codecs[chip->driver_type]); if (err < 0)
goto out_free;
bus->codec_mask = 0;#ifdef CONFIG_SND_HDA_PATCH_LOADER
2.29.2