[PATCH 4.1 18/65] ALSA: hda - Disable widget power-save for VIA codecs

From	Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Newsgroups	linux.kernel
Subject	[PATCH 4.1 18/65] ALSA: hda - Disable widget power-save for VIA codecs
Date	2015-07-19 21:50 +0200
Message-ID	<pO2L0-3Yv-21@gated-at.bofh.it> (permalink)
References	<pO28i-3ee-9@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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4.1-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Takashi Iwai <tiwai@suse.de>

commit 735c75cf4d434862e38c01dcfb2ce8d2fcb9035f upstream.

The widget power-save that was enabled in 4.1 kernel seems resulting
in the silent output on VIA codecs by some reason.  Some widgets get
wrong power states.

As a quick fix, turn this flag off while keeping power_down_unused
flag.  This will bring back to the state of 4.0.x.

Fixes: 688b12cc3ca8 ('ALSA: hda - Use the new power control for VIA codecs')
Reported-and-tested-by: Harald Dunkel <harri@afaics.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 sound/pci/hda/patch_via.c |    8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

--- a/sound/pci/hda/patch_via.c
+++ b/sound/pci/hda/patch_via.c
@@ -238,7 +238,9 @@ static int via_pin_power_ctl_get(struct
 				 struct snd_ctl_elem_value *ucontrol)
 {
 	struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
-	ucontrol->value.enumerated.item[0] = codec->power_save_node;
+	struct via_spec *spec = codec->spec;
+
+	ucontrol->value.enumerated.item[0] = spec->gen.power_down_unused;
 	return 0;
 }
 
@@ -249,9 +251,9 @@ static int via_pin_power_ctl_put(struct
 	struct via_spec *spec = codec->spec;
 	bool val = !!ucontrol->value.enumerated.item[0];
 
-	if (val == codec->power_save_node)
+	if (val == spec->gen.power_down_unused)
 		return 0;
-	codec->power_save_node = val;
+	/* codec->power_save_node = val; */ /* widget PM seems yet broken */
 	spec->gen.power_down_unused = val;
 	analog_low_current_mode(codec);
 	return 1;


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Thread

[PATCH 4.1 00/65] 4.1.3-stable review Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2015-07-19 21:40 +0200
  [PATCH 4.1 43/65] regmap: Fix possible shift overflow in regmap_field_init() Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2015-07-19 21:40 +0200
  [PATCH 4.1 22/65] ALSA: hda - Add a fixup for Dell E7450 Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2015-07-19 21:40 +0200
  [PATCH 4.1 39/65] mm: kmemleak: allow safe memory scanning during kmemleak disabling Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2015-07-19 21:40 +0200
  [PATCH 4.1 04/65] kernfs: Add support for always empty directories. Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2015-07-19 21:40 +0200
  [PATCH 4.1 15/65] ALSA: pcm: Fix pcm_class sysfs output Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2015-07-19 21:50 +0200
  [PATCH 4.1 16/65] ALSA: hda - Fix Dock Headphone on Thinkpad X250 seen as a Line Out Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2015-07-19 21:50 +0200
  [PATCH 4.1 17/65] ALSA: hda - set proper caps for newer AMD hda audio in KB/KV Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2015-07-19 21:50 +0200
  [PATCH 4.1 13/65] ipr: Increase default adapter init stage change timeout Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2015-07-19 21:50 +0200
  [PATCH 4.1 11/65] gpio: rcar: Check for irq_set_irq_wake() failures Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2015-07-19 21:50 +0200
  [PATCH 4.1 14/65] Disable write buffering on Toshiba ToPIC95 Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2015-07-19 21:50 +0200
  [PATCH 4.1 12/65] rcu: Correctly handle non-empty Tiny RCU callback list with none ready Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2015-07-19 21:50 +0200
  [PATCH 4.1 18/65] ALSA: hda - Disable widget power-save for VIA codecs Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2015-07-19 21:50 +0200
  [PATCH 4.1 10/65] gpio: crystalcove: set IRQCHIP_SKIP_SET_WAKE for the irqchip Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2015-07-19 21:50 +0200
  Re: [PATCH 4.1 00/65] 4.1.3-stable review Shuah Khan <shuahkh@osg.samsung.com> - 2015-07-20 19:20 +0200

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