ALSA: hda - Allow codec-specific set_power_state ops

The procedure for codec D-state change may have exceptional cases
depending on the codec chip, such as a longer delay or suppressing D3.

This patch adds a new codec ops, set_power_state() to override the system
default function.  For ease of porting, snd_hda_codec_set_power_to_all()
helper function is extracted from the default set_power_state() function.

As an example, the Conexant codec-specific delay is removed from the
default routine but moved to patch_conexant.c.
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/hda_codec.c

@@ -3203,51 +3203,30 @@ void snd_hda_sequence_write_cache(struct hda_codec *codec,
 EXPORT_SYMBOL_HDA(snd_hda_sequence_write_cache);
 #endif /* CONFIG_PM */
 
-/*
- * set power state of the codec
- */
-static void hda_set_power_state(struct hda_codec *codec, hda_nid_t fg,
-				unsigned int power_state)
+void snd_hda_codec_set_power_to_all(struct hda_codec *codec, hda_nid_t fg,
+				    unsigned int power_state,
+				    bool eapd_workaround)
 {
-	hda_nid_t nid;
+	hda_nid_t nid = codec->start_nid;
 	int i;
 
-	/* this delay seems necessary to avoid click noise at power-down */
-	if (power_state == AC_PWRST_D3)
-		msleep(100);
-	snd_hda_codec_read(codec, fg, 0, AC_VERB_SET_POWER_STATE,
-			    power_state);
-	/* partial workaround for "azx_get_response timeout" */
-	if (power_state == AC_PWRST_D0 &&
-	    (codec->vendor_id & 0xffff0000) == 0x14f10000)
-		msleep(10);
-
-	nid = codec->start_nid;
 	for (i = 0; i < codec->num_nodes; i++, nid++) {
 		unsigned int wcaps = get_wcaps(codec, nid);
-		if (wcaps & AC_WCAP_POWER) {
-			unsigned int wid_type = get_wcaps_type(wcaps);
-			if (power_state == AC_PWRST_D3 &&
-			    wid_type == AC_WID_PIN) {
-				unsigned int pincap;
-				/*
-				 * don't power down the widget if it controls
-				 * eapd and EAPD_BTLENABLE is set.
-				 */
-				pincap = snd_hda_query_pin_caps(codec, nid);
-				if (pincap & AC_PINCAP_EAPD) {
-					int eapd = snd_hda_codec_read(codec,
-						nid, 0,
+		if (!(wcaps & AC_WCAP_POWER))
+			continue;
+		/* don't power down the widget if it controls eapd and
+		 * EAPD_BTLENABLE is set.
+		 */
+		if (eapd_workaround && power_state == AC_PWRST_D3 &&
+		    get_wcaps_type(wcaps) == AC_WID_PIN &&
+		    (snd_hda_query_pin_caps(codec, nid) & AC_PINCAP_EAPD)) {
+			int eapd = snd_hda_codec_read(codec, nid, 0,
 						AC_VERB_GET_EAPD_BTLENABLE, 0);
-					eapd &= 0x02;
-					if (eapd)
-						continue;
-				}
-			}
-			snd_hda_codec_write(codec, nid, 0,
-					    AC_VERB_SET_POWER_STATE,
-					    power_state);
+			if (eapd & 0x02)
+				continue;
 		}
+		snd_hda_codec_write(codec, nid, 0, AC_VERB_SET_POWER_STATE,
+				    power_state);
 	}
 
 	if (power_state == AC_PWRST_D0) {
@@ -3264,6 +3243,26 @@ static void hda_set_power_state(struct hda_codec *codec, hda_nid_t fg,
 		} while (time_after_eq(end_time, jiffies));
 	}
 }
+EXPORT_SYMBOL_HDA(snd_hda_codec_set_power_to_all);
+
+/*
+ * set power state of the codec
+ */
+static void hda_set_power_state(struct hda_codec *codec, hda_nid_t fg,
+				unsigned int power_state)
+{
+	if (codec->patch_ops.set_power_state) {
+		codec->patch_ops.set_power_state(codec, fg, power_state);
+		return;
+	}
+
+	/* this delay seems necessary to avoid click noise at power-down */
+	if (power_state == AC_PWRST_D3)
+		msleep(100);
+	snd_hda_codec_read(codec, fg, 0, AC_VERB_SET_POWER_STATE,
+			    power_state);
+	snd_hda_codec_set_power_to_all(codec, fg, power_state, true);
+}
 
 #ifdef CONFIG_SND_HDA_HWDEP
 /* execute additional init verbs */
@@ -4073,9 +4072,6 @@ int snd_hda_add_new_ctls(struct hda_codec *codec,
 EXPORT_SYMBOL_HDA(snd_hda_add_new_ctls);
 
 #ifdef CONFIG_SND_HDA_POWER_SAVE
-static void hda_set_power_state(struct hda_codec *codec, hda_nid_t fg,
-				unsigned int power_state);
-
 static void hda_power_work(struct work_struct *work)
 {
 	struct hda_codec *codec =

sound/pci/hda/hda_codec.h

@@ -700,6 +700,8 @@ struct hda_codec_ops {
 	int (*init)(struct hda_codec *codec);
 	void (*free)(struct hda_codec *codec);
 	void (*unsol_event)(struct hda_codec *codec, unsigned int res);
+	void (*set_power_state)(struct hda_codec *codec, hda_nid_t fg,
+				unsigned int power_state);
 #ifdef CONFIG_PM
 	int (*suspend)(struct hda_codec *codec, pm_message_t state);
 	int (*post_suspend)(struct hda_codec *codec);
@@ -1006,6 +1008,9 @@ int snd_hda_is_supported_format(struct hda_codec *codec, hda_nid_t nid,
  */
 void snd_hda_get_codec_name(struct hda_codec *codec, char *name, int namelen);
 void snd_hda_bus_reboot_notify(struct hda_bus *bus);
+void snd_hda_codec_set_power_to_all(struct hda_codec *codec, hda_nid_t fg,
+				    unsigned int power_state,
+				    bool eapd_workaround);
 
 /*
  * power management

sound/pci/hda/patch_conexant.c

@@ -446,6 +446,19 @@ static int conexant_init_jacks(struct hda_codec *codec)
 	return 0;
 }
 
+static void conexant_set_power(struct hda_codec *codec, hda_nid_t fg,
+			       unsigned int power_state)
+{
+	if (power_state == AC_PWRST_D3)
+		msleep(100);
+	snd_hda_codec_read(codec, fg, 0, AC_VERB_SET_POWER_STATE,
+			    power_state);
+	/* partial workaround for "azx_get_response timeout" */
+	if (power_state == AC_PWRST_D0)
+		msleep(10);
+	snd_hda_codec_set_power_to_all(codec, fg, power_state, true);
+}
+
 static int conexant_init(struct hda_codec *codec)
 {
 	struct conexant_spec *spec = codec->spec;
@@ -588,6 +601,7 @@ static const struct hda_codec_ops conexant_patch_ops = {
 	.build_pcms = conexant_build_pcms,
 	.init = conexant_init,
 	.free = conexant_free,
+	.set_power_state = conexant_set_power,
 #ifdef CONFIG_SND_HDA_POWER_SAVE
 	.suspend = conexant_suspend,
 #endif