| Message ID | 1519987958-5482-2-git-send-email-rakesh.a.ughreja@intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
diff --git a/sound/hda/ext/hdac_ext_controller.c b/sound/hda/ext/hdac_ext_controller.c index 7277411..2d3770a 100644 --- a/sound/hda/ext/hdac_ext_controller.c +++ b/sound/hda/ext/hdac_ext_controller.c @@ -271,6 +271,14 @@ int snd_hdac_ext_bus_link_get(struct hdac_bus *bus, } ret = snd_hdac_ext_bus_link_power_up(link); + + /* + * wait for 521usec for codec to report status + * HDA spec section 4.3 - Codec Discovery + */ + udelay(521); + bus->codec_mask = snd_hdac_chip_readw(bus, STATESTS); + dev_dbg(bus->dev, "codec_mask = 0x%lx\n", bus->codec_mask); } mutex_unlock(&bus->lock);
As per HDA spec section 4.3 - Codec Discovery, the software shall wait for atleast 521usec for codec to respond after link reset. With the multi-link capability each link is turned ON/OFF individually. Link controller drives reset signal when it is turned ON. Signed-off-by: Rakesh Ughreja <rakesh.a.ughreja@intel.com> --- sound/hda/ext/hdac_ext_controller.c | 8 ++++++++ 1 file changed, 8 insertions(+)