From: Takashi Iwai <tiwai@suse.de>
Date: Thu, 24 Jan 2013 16:27:32 +0000 (+0100)
Subject: ALSA: hda - Synchronize the power state at the end of codec init
X-Git-Tag: upstream/snapshot3+hdmi~5621^2~67
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=b9c590bbf1d7621c3f9feb6ac0992d638244d0b1;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git

ALSA: hda - Synchronize the power state at the end of codec init

Put the power state synchronization at the end of the parsing of
codec.  This is necessary when the power filter is changed during the
codec probe.  Since the first power-up sequence is performed without
the special filter, all widgets are supposed to be ON at this point.

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 19ff923..2311114 100644
--- a/sound/pci/hda/hda_codec.c
+++ b/sound/pci/hda/hda_codec.c
@@ -3765,6 +3765,37 @@ static unsigned int hda_set_power_state(struct hda_codec *codec,
 	return state;
 }
 
+/* sync power states of all widgets;
+ * this is called at the end of codec parsing
+ */
+static void sync_power_up_states(struct hda_codec *codec)
+{
+	hda_nid_t nid = codec->start_nid;
+	int i;
+
+	/* don't care if no or standard filter is used */
+	if (!codec->power_filter || codec->power_filter == default_power_filter)
+		return;
+
+	for (i = 0; i < codec->num_nodes; i++, nid++) {
+		unsigned int wcaps = get_wcaps(codec, nid);
+		unsigned int state, target;
+		if (!(wcaps & AC_WCAP_POWER))
+			continue;
+		target = codec->power_filter(codec, nid, AC_PWRST_D0);
+		if (target == AC_PWRST_D0)
+			continue;
+		state = snd_hda_codec_read(codec, nid, 0,
+					   AC_VERB_GET_POWER_STATE, 0);
+		if (state & AC_PWRST_ERROR)
+			continue;
+		state = (state >> 4) & 0x0f;
+		if (state != target)
+			snd_hda_codec_write(codec, nid, 0,
+					    AC_VERB_SET_POWER_STATE, target);
+	}
+}
+
 #ifdef CONFIG_SND_HDA_HWDEP
 /* execute additional init verbs */
 static void hda_exec_init_verbs(struct hda_codec *codec)
@@ -3952,6 +3983,7 @@ int snd_hda_codec_build_controls(struct hda_codec *codec)
 		hda_jackpoll_work(&codec->jackpoll_work.work);
 	else
 		snd_hda_jack_report_sync(codec); /* call at the last init point */
+	sync_power_up_states(codec);
 	return 0;
 }