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Commit 2377c3c3 authored by Lu, Han's avatar Lu, Han Committed by Takashi Iwai
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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: default avatarLu, Han <han.lu@intel.com>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 8654844c

sound/pci/hda/hda_codec.c

+3 −0
Original line number Diff line number Diff line
@@ -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);

sound/pci/hda/hda_codec.h

+1 −0
Original line number Diff line number Diff line
@@ -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;

sound/pci/hda/patch_hdmi.c

+4 −0
Original line number Diff line number Diff line
@@ -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();