Attachment 117001 Details for Bug 91255 – Han's patch

Han's patch

Han's patch (text/plain), 2.11 KB, created by xubin on 2015-07-08 08:13:43 UTC

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Creator: xubin

Created: 2015-07-08 08:13:43 UTC

Size: 2.11 KB

patch

obsolete

>commit 2377c3c388815cd0a33309a6b6bb713600258a3e
>Author: Lu, Han <han.lu@intel.com>
>Date:   Tue Jun 9 16:50:38 2015 +0800
>
>    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 938ee4a..d702298 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 6c57258..12837ab 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 407978b..f852734 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();

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