ALSA: hda: Intel: enable automatic runtime pm for HDMI codecs by default

Enable runtime PM of the HDMI audio codec on the latest Intel platforms.
So the HD-A controller or HDMI codec can suspend when idle timeout by
default and release the GFX power well.
The patch influences HSW/BDW/BYT/BSW/SKL. Eariler platforms and third
party analog codecs will not be influenced.

Signed-off-by: Lu, Han <han.lu@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 4 insertions, 0 deletions

diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index 407978b6db66..f8527342a150 100644
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -2356,6 +2356,10 @@ static int patch_generic_hdmi(struct hda_codec *codec)
                 codec->dp_mst = true;
         }
 
+        /* Enable runtime pm for HDMI audio codec of HSW/BDW/SKL/BYT/BSW */
+        if (is_haswell_plus(codec) || is_valleyview_plus(codec))
+                codec->auto_runtime_pm = 1;
+
         generic_hdmi_init_per_pins(codec);
 
         init_channel_allocations();