From: Lu, Han <han.lu@intel.com>
Date: Tue, 9 Jun 2015 08:50:38 +0000 (+0800)
Subject: ALSA: hda: Intel: enable automatic runtime pm for HDMI codecs by default
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=2377c3c388815cd0a33309a6b6bb713600258a3e;p=linux-beck.git

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>
---

diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
index 938ee4a6bd3a..d70229841156 100644
--- a/sound/pci/hda/hda_codec.c
+++ b/sound/pci/hda/hda_codec.c
@@ -3496,6 +3496,9 @@ static void codec_set_power_save(struct hda_codec *codec, int delay)
 {
 	struct device *dev = hda_codec_dev(codec);
 
+	if (delay == 0 && codec->auto_runtime_pm)
+		delay = 3000;
+
 	if (delay > 0) {
 		pm_runtime_set_autosuspend_delay(dev, delay);
 		pm_runtime_use_autosuspend(dev);
diff --git a/sound/pci/hda/hda_codec.h b/sound/pci/hda/hda_codec.h
index 6c572588f7e5..12837abbbbe5 100644
--- a/sound/pci/hda/hda_codec.h
+++ b/sound/pci/hda/hda_codec.h
@@ -251,6 +251,7 @@ struct hda_codec {
 	unsigned int dp_mst:1; /* support DP1.2 Multi-stream transport */
 	unsigned int dump_coef:1; /* dump processing coefs in codec proc file */
 	unsigned int power_save_node:1; /* advanced PM for each widget */
+	unsigned int auto_runtime_pm:1; /* enable automatic codec runtime pm */
 #ifdef CONFIG_PM
 	unsigned long power_on_acct;
 	unsigned long power_off_acct;
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();