A regression was introduced in 7639a06c23c7d4cda3: if AC_PAR_SUBSYSTEM_ID reads as zero, one should retry using AC_VERB_GET_SUBSYSTEM_ID.
This seems to hit many codecs (my own laptop included), and causes quirks for some machines not to apply correctly.
Reported-by: TienFu Chen tienfu.chen@canonical.com Signed-off-by: David Henningsson david.henningsson@canonical.com --- sound/hda/hdac_device.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/sound/hda/hdac_device.c b/sound/hda/hdac_device.c index 6e8ee1d..53b6b95 100644 --- a/sound/hda/hdac_device.c +++ b/sound/hda/hdac_device.c @@ -91,7 +91,7 @@ int snd_hdac_device_init(struct hdac_device *codec, struct hdac_bus *bus,
codec->power_caps = snd_hdac_read_parm(codec, fg, AC_PAR_POWER_STATE); /* reread ssid if not set by parameter */ - if (codec->subsystem_id == -1) + if (codec->subsystem_id == -1 || codec->subsystem_id == 0) snd_hdac_read(codec, fg, AC_VERB_GET_SUBSYSTEM_ID, 0, &codec->subsystem_id);