Merge branch 'topic/hda-pm-refactor' into for-next

Pull refactoring / fixes of HD-audio PM and display power management
Signed-off-by: Takashi Iwai <tiwai@suse.de>

include/sound/hda_codec.h

@@ -236,6 +236,7 @@ struct hda_codec {
 	/* misc flags */
 	unsigned int in_freeing:1; /* being released */
 	unsigned int registered:1; /* codec was registered */
+	unsigned int display_power_control:1; /* needs display power */
 	unsigned int spdif_status_reset :1; /* needs to toggle SPDIF for each
 					     * status change
 					     * (e.g. Realtek codecs)

include/sound/hda_component.h

@@ -5,10 +5,15 @@
 #define __SOUND_HDA_COMPONENT_H
 
 #include <drm/drm_audio_component.h>
+#include <sound/hdaudio.h>
+
+/* virtual idx for controller */
+#define HDA_CODEC_IDX_CONTROLLER	HDA_MAX_CODECS
 
 #ifdef CONFIG_SND_HDA_COMPONENT
 int snd_hdac_set_codec_wakeup(struct hdac_bus *bus, bool enable);
-int snd_hdac_display_power(struct hdac_bus *bus, bool enable);
+void snd_hdac_display_power(struct hdac_bus *bus, unsigned int idx,
+			    bool enable);
 int snd_hdac_sync_audio_rate(struct hdac_device *codec, hda_nid_t nid,
 			     int dev_id, int rate);
 int snd_hdac_acomp_get_eld(struct hdac_device *codec, hda_nid_t nid, int dev_id,
@@ -25,9 +30,9 @@ static inline int snd_hdac_set_codec_wakeup(struct hdac_bus *bus, bool enable)
 {
 	return 0;
 }
-static inline int snd_hdac_display_power(struct hdac_bus *bus, bool enable)
+static inline void snd_hdac_display_power(struct hdac_bus *bus,
+					  unsigned int idx, bool enable)
 {
-	return 0;
 }
 static inline int snd_hdac_sync_audio_rate(struct hdac_device *codec,
 					   hda_nid_t nid, int dev_id, int rate)

include/sound/hdaudio.h

@@ -79,7 +79,6 @@ struct hdac_device {
 
 	/* misc flags */
 	atomic_t in_pm;		/* suspend/resume being performed */
-	bool  link_power_control:1;
 
 	/* sysfs */
 	struct hdac_widget_tree *widgets;
@@ -237,8 +236,6 @@ struct hdac_bus_ops {
 	/* get a response from the last command */
 	int (*get_response)(struct hdac_bus *bus, unsigned int addr,
 			    unsigned int *res);
-	/* control the link power  */
-	int (*link_power)(struct hdac_bus *bus, bool enable);
 };
 
 /*
@@ -363,7 +360,8 @@ struct hdac_bus {
 
 	/* DRM component interface */
 	struct drm_audio_component *audio_component;
-	int drm_power_refcount;
+	long display_power_status;
+	bool display_power_active;
 
 	/* parameters required for enhanced capabilities */
 	int num_streams;
@@ -404,7 +402,6 @@ int snd_hdac_bus_send_cmd(struct hdac_bus *bus, unsigned int val);
 int snd_hdac_bus_get_response(struct hdac_bus *bus, unsigned int addr,
 			      unsigned int *res);
 int snd_hdac_bus_parse_capabilities(struct hdac_bus *bus);
-int snd_hdac_link_power(struct hdac_device *codec, bool enable);
 
 bool snd_hdac_bus_init_chip(struct hdac_bus *bus, bool full_reset);
 void snd_hdac_bus_stop_chip(struct hdac_bus *bus);

sound/hda/hdac_component.c

@@ -54,41 +54,44 @@ EXPORT_SYMBOL_GPL(snd_hdac_set_codec_wakeup);
 /**
  * snd_hdac_display_power - Power up / down the power refcount
  * @bus: HDA core bus
+ * @idx: HDA codec address, pass HDA_CODEC_IDX_CONTROLLER for controller
  * @enable: power up or down
  *
- * This function is supposed to be used only by a HD-audio controller
- * driver that needs the interaction with graphics driver.
+ * This function is used by either HD-audio controller or codec driver that
+ * needs the interaction with graphics driver.
  *
- * This function manages a refcount and calls the get_power() and
+ * This function updates the power status, and calls the get_power() and
  * put_power() ops accordingly, toggling the codec wakeup, too.
- *
- * Returns zero for success or a negative error code.
  */
-int snd_hdac_display_power(struct hdac_bus *bus, bool enable)
+void snd_hdac_display_power(struct hdac_bus *bus, unsigned int idx, bool enable)
 {
 	struct drm_audio_component *acomp = bus->audio_component;
 
-	if (!acomp || !acomp->ops)
-		return -ENODEV;
-
 	dev_dbg(bus->dev, "display power %s\n",
 		enable ? "enable" : "disable");
+	if (enable)
+		set_bit(idx, &bus->display_power_status);
+	else
+		clear_bit(idx, &bus->display_power_status);
 
-	if (enable) {
-		if (!bus->drm_power_refcount++) {
+	if (!acomp || !acomp->ops)
+		return;
+
+	if (bus->display_power_status) {
+		if (!bus->display_power_active) {
 			if (acomp->ops->get_power)
 				acomp->ops->get_power(acomp->dev);
 			snd_hdac_set_codec_wakeup(bus, true);
 			snd_hdac_set_codec_wakeup(bus, false);
+			bus->display_power_active = true;
 		}
 	} else {
-		WARN_ON(!bus->drm_power_refcount);
-		if (!--bus->drm_power_refcount)
+		if (bus->display_power_active) {
 			if (acomp->ops->put_power)
 				acomp->ops->put_power(acomp->dev);
+			bus->display_power_active = false;
+		}
 	}
-
-	return 0;
 }
 EXPORT_SYMBOL_GPL(snd_hdac_display_power);
 
@@ -321,10 +324,12 @@ int snd_hdac_acomp_exit(struct hdac_bus *bus)
 	if (!acomp)
 		return 0;
 
-	WARN_ON(bus->drm_power_refcount);
-	if (bus->drm_power_refcount > 0 && acomp->ops)
+	if (WARN_ON(bus->display_power_active) && acomp->ops)
 		acomp->ops->put_power(acomp->dev);
 
+	bus->display_power_active = false;
+	bus->display_power_status = 0;
+
 	component_master_del(dev, &hdac_component_master_ops);
 
 	bus->audio_component = NULL;

sound/hda/hdac_device.c

@@ -622,23 +622,6 @@ int snd_hdac_power_down_pm(struct hdac_device *codec)
 EXPORT_SYMBOL_GPL(snd_hdac_power_down_pm);
 #endif
 
-/**
- * snd_hdac_link_power - Enable/disable the link power for a codec
- * @codec: the codec object
- * @bool: enable or disable the link power
- */
-int snd_hdac_link_power(struct hdac_device *codec, bool enable)
-{
-	if  (!codec->link_power_control)
-		return 0;
-
-	if  (codec->bus->ops->link_power)
-		return codec->bus->ops->link_power(codec->bus, enable);
-	else
-		return -EINVAL;
-}
-EXPORT_SYMBOL_GPL(snd_hdac_link_power);
-
 /* codec vendor labels */
 struct hda_vendor_id {
 	unsigned int id;

sound/pci/hda/hda_codec.c

@@ -36,6 +36,7 @@
 #include "hda_beep.h"
 #include "hda_jack.h"
 #include <sound/hda_hwdep.h>
+#include <sound/hda_component.h>
 
 #define codec_in_pm(codec)		snd_hdac_is_in_pm(&codec->core)
 #define hda_codec_is_power_on(codec)	snd_hdac_is_power_on(&codec->core)
@@ -799,6 +800,13 @@ void snd_hda_codec_cleanup_for_unbind(struct hda_codec *codec)
 static unsigned int hda_set_power_state(struct hda_codec *codec,
 				unsigned int power_state);
 
+/* enable/disable display power per codec */
+static void codec_display_power(struct hda_codec *codec, bool enable)
+{
+	if (codec->display_power_control)
+		snd_hdac_display_power(&codec->bus->core, codec->addr, enable);
+}
+
 /* also called from hda_bind.c */
 void snd_hda_codec_register(struct hda_codec *codec)
 {
@@ -806,7 +814,7 @@ void snd_hda_codec_register(struct hda_codec *codec)
 		return;
 	if (device_is_registered(hda_codec_dev(codec))) {
 		snd_hda_register_beep_device(codec);
-		snd_hdac_link_power(&codec->core, true);
+		codec_display_power(codec, true);
 		pm_runtime_enable(hda_codec_dev(codec));
 		/* it was powered up in snd_hda_codec_new(), now all done */
 		snd_hda_power_down(codec);
@@ -834,7 +842,7 @@ static int snd_hda_codec_dev_free(struct snd_device *device)
 
 	codec->in_freeing = 1;
 	snd_hdac_device_unregister(&codec->core);
-	snd_hdac_link_power(&codec->core, false);
+	codec_display_power(codec, false);
 	put_device(hda_codec_dev(codec));
 	return 0;
 }
@@ -2926,7 +2934,7 @@ static int hda_codec_runtime_suspend(struct device *dev)
 	    (codec_has_clkstop(codec) && codec_has_epss(codec) &&
 	     (state & AC_PWRST_CLK_STOP_OK)))
 		snd_hdac_codec_link_down(&codec->core);
-	snd_hdac_link_power(&codec->core, false);
+	codec_display_power(codec, false);
 	return 0;
 }
 
@@ -2934,7 +2942,7 @@ static int hda_codec_runtime_resume(struct device *dev)
 {
 	struct hda_codec *codec = dev_to_hda_codec(dev);
 
-	snd_hdac_link_power(&codec->core, true);
+	codec_display_power(codec, true);
 	snd_hdac_codec_link_up(&codec->core);
 	hda_call_codec_resume(codec);
 	pm_runtime_mark_last_busy(dev);

sound/pci/hda/hda_controller.c

@@ -989,20 +989,9 @@ static int azx_get_response(struct hdac_bus *bus, unsigned int addr,
 		return azx_rirb_get_response(bus, addr, res);
 }
 
-static int azx_link_power(struct hdac_bus *bus, bool enable)
-{
-	struct azx *chip = bus_to_azx(bus);
-
-	if (chip->ops->link_power)
-		return chip->ops->link_power(chip, enable);
-	else
-		return -EINVAL;
-}
-
 static const struct hdac_bus_ops bus_core_ops = {
 	.command = azx_send_cmd,
 	.get_response = azx_get_response,
-	.link_power = azx_link_power,
 };
 
 #ifdef CONFIG_SND_HDA_DSP_LOADER

sound/pci/hda/hda_controller.h

@@ -50,11 +50,7 @@
 /* 24 unused */
 #define AZX_DCAPS_COUNT_LPIB_DELAY  (1 << 25)	/* Take LPIB as delay */
 #define AZX_DCAPS_PM_RUNTIME	(1 << 26)	/* runtime PM support */
-#ifdef CONFIG_SND_HDA_I915
-#define AZX_DCAPS_I915_POWERWELL (1 << 27)	/* HSW i915 powerwell support */
-#else
-#define AZX_DCAPS_I915_POWERWELL 0		/* NOP */
-#endif
+/* 27 unused */
 #define AZX_DCAPS_CORBRP_SELF_CLEAR (1 << 28)	/* CORBRP clears itself after reset */
 #define AZX_DCAPS_NO_MSI64      (1 << 29)	/* Stick to 32-bit MSIs */
 #define AZX_DCAPS_SEPARATE_STREAM_TAG	(1 << 30) /* capture and playback use separate stream tag */

sound/pci/hda/hda_intel.c

@@ -310,31 +310,28 @@ enum {
 #define AZX_DCAPS_INTEL_HASWELL \
 	(/*AZX_DCAPS_ALIGN_BUFSIZE |*/ AZX_DCAPS_COUNT_LPIB_DELAY |\
 	 AZX_DCAPS_PM_RUNTIME | AZX_DCAPS_I915_COMPONENT |\
-	 AZX_DCAPS_I915_POWERWELL | AZX_DCAPS_SNOOP_TYPE(SCH))
+	 AZX_DCAPS_SNOOP_TYPE(SCH))
 
 /* Broadwell HDMI can't use position buffer reliably, force to use LPIB */
 #define AZX_DCAPS_INTEL_BROADWELL \
 	(/*AZX_DCAPS_ALIGN_BUFSIZE |*/ AZX_DCAPS_POSFIX_LPIB |\
 	 AZX_DCAPS_PM_RUNTIME | AZX_DCAPS_I915_COMPONENT |\
-	 AZX_DCAPS_I915_POWERWELL | AZX_DCAPS_SNOOP_TYPE(SCH))
+	 AZX_DCAPS_SNOOP_TYPE(SCH))
 
 #define AZX_DCAPS_INTEL_BAYTRAIL \
-	(AZX_DCAPS_INTEL_PCH_BASE | AZX_DCAPS_I915_COMPONENT |\
-	 AZX_DCAPS_I915_POWERWELL)
+	(AZX_DCAPS_INTEL_PCH_BASE | AZX_DCAPS_I915_COMPONENT)
 
 #define AZX_DCAPS_INTEL_BRASWELL \
 	(AZX_DCAPS_INTEL_PCH_BASE | AZX_DCAPS_PM_RUNTIME |\
-	 AZX_DCAPS_I915_COMPONENT | AZX_DCAPS_I915_POWERWELL)
+	 AZX_DCAPS_I915_COMPONENT)
 
 #define AZX_DCAPS_INTEL_SKYLAKE \
 	(AZX_DCAPS_INTEL_PCH_BASE | AZX_DCAPS_PM_RUNTIME |\
-	 AZX_DCAPS_SEPARATE_STREAM_TAG | AZX_DCAPS_I915_COMPONENT |\
-	 AZX_DCAPS_I915_POWERWELL)
+	 AZX_DCAPS_SEPARATE_STREAM_TAG | AZX_DCAPS_I915_COMPONENT)
 
 #define AZX_DCAPS_INTEL_BROXTON \
 	(AZX_DCAPS_INTEL_PCH_BASE | AZX_DCAPS_PM_RUNTIME |\
-	 AZX_DCAPS_SEPARATE_STREAM_TAG | AZX_DCAPS_I915_COMPONENT |\
-	 AZX_DCAPS_I915_POWERWELL)
+	 AZX_DCAPS_SEPARATE_STREAM_TAG | AZX_DCAPS_I915_COMPONENT)
 
 /* quirks for ATI SB / AMD Hudson */
 #define AZX_DCAPS_PRESET_ATI_SB \
@@ -591,7 +588,6 @@ static void hda_intel_init_chip(struct azx *chip, bool full_reset)
 	struct pci_dev *pci = chip->pci;
 	u32 val;
 
-	if (chip->driver_caps & AZX_DCAPS_I915_POWERWELL)
 	snd_hdac_set_codec_wakeup(bus, true);
 	if (chip->driver_type == AZX_DRIVER_SKL) {
 		pci_read_config_dword(pci, INTEL_HDA_CGCTL, &val);
@@ -604,7 +600,7 @@ static void hda_intel_init_chip(struct azx *chip, bool full_reset)
 		val = val | INTEL_HDA_CGCTL_MISCBDCGE;
 		pci_write_config_dword(pci, INTEL_HDA_CGCTL, val);
 	}
-	if (chip->driver_caps & AZX_DCAPS_I915_POWERWELL)
+
 	snd_hdac_set_codec_wakeup(bus, false);
 
 	/* reduce dma latency to avoid noise */
@@ -667,13 +663,8 @@ static int azx_position_check(struct azx *chip, struct azx_dev *azx_dev)
 	return 0;
 }
 
-/* Enable/disable i915 display power for the link */
-static int azx_intel_link_power(struct azx *chip, bool enable)
-{
-	struct hdac_bus *bus = azx_bus(chip);
-
-	return snd_hdac_display_power(bus, enable);
-}
+#define display_power(chip, enable) \
+	snd_hdac_display_power(azx_bus(chip), HDA_CODEC_IDX_CONTROLLER, enable)
 
 /*
  * Check whether the current DMA position is acceptable for updating
@@ -930,35 +921,75 @@ static int param_set_xint(const char *val, const struct kernel_param *kp)
 	mutex_unlock(&card_list_lock);
 	return 0;
 }
-#else
-#define azx_add_card_list(chip) /* NOP */
-#define azx_del_card_list(chip) /* NOP */
-#endif /* CONFIG_PM */
 
-#ifdef CONFIG_PM_SLEEP
 /*
  * power management
  */
-static int azx_suspend(struct device *dev)
+static bool azx_is_pm_ready(struct snd_card *card)
 {
-	struct snd_card *card = dev_get_drvdata(dev);
 	struct azx *chip;
 	struct hda_intel *hda;
-	struct hdac_bus *bus;
 
 	if (!card)
-		return 0;
-
+		return false;
 	chip = card->private_data;
 	hda = container_of(chip, struct hda_intel, chip);
 	if (chip->disabled || hda->init_failed || !chip->running)
+		return false;
+	return true;
+}
+
+static void __azx_runtime_suspend(struct azx *chip)
+{
+	azx_stop_chip(chip);
+	azx_enter_link_reset(chip);
+	azx_clear_irq_pending(chip);
+	display_power(chip, false);
+}
+
+static void __azx_runtime_resume(struct azx *chip)
+{
+	struct hda_intel *hda = container_of(chip, struct hda_intel, chip);
+	struct hdac_bus *bus = azx_bus(chip);
+	struct hda_codec *codec;
+	int status;
+
+	display_power(chip, true);
+	if (hda->need_i915_power)
+		snd_hdac_i915_set_bclk(bus);
+
+	/* Read STATESTS before controller reset */
+	status = azx_readw(chip, STATESTS);
+
+	azx_init_pci(chip);
+	hda_intel_init_chip(chip, true);
+
+	if (status) {
+		list_for_each_codec(codec, &chip->bus)
+			if (status & (1 << codec->addr))
+				schedule_delayed_work(&codec->jackpoll_work,
+						      codec->jackpoll_interval);
+	}
+
+	/* power down again for link-controlled chips */
+	if (!hda->need_i915_power)
+		display_power(chip, false);
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int azx_suspend(struct device *dev)
+{
+	struct snd_card *card = dev_get_drvdata(dev);
+	struct azx *chip;
+	struct hdac_bus *bus;
+
+	if (!azx_is_pm_ready(card))
 		return 0;
 
+	chip = card->private_data;
 	bus = azx_bus(chip);
 	snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
-	azx_clear_irq_pending(chip);
-	azx_stop_chip(chip);
-	azx_enter_link_reset(chip);
+	__azx_runtime_suspend(chip);
 	if (bus->irq >= 0) {
 		free_irq(bus->irq, chip);
 		bus->irq = -1;
@@ -966,9 +997,6 @@ static int azx_suspend(struct device *dev)
 
 	if (chip->msi)
 		pci_disable_msi(chip->pci);
-	if ((chip->driver_caps & AZX_DCAPS_I915_POWERWELL)
-		&& hda->need_i915_power)
-		snd_hdac_display_power(bus, false);
 
 	trace_azx_suspend(chip);
 	return 0;
@@ -976,41 +1004,19 @@ static int azx_suspend(struct device *dev)
 
 static int azx_resume(struct device *dev)
 {
-	struct pci_dev *pci = to_pci_dev(dev);
 	struct snd_card *card = dev_get_drvdata(dev);
 	struct azx *chip;
-	struct hda_intel *hda;
-	struct hdac_bus *bus;
 
-	if (!card)
+	if (!azx_is_pm_ready(card))
 		return 0;
 
 	chip = card->private_data;
-	hda = container_of(chip, struct hda_intel, chip);
-	bus = azx_bus(chip);
-	if (chip->disabled || hda->init_failed || !chip->running)
-		return 0;
-
-	if (chip->driver_caps & AZX_DCAPS_I915_POWERWELL) {
-		snd_hdac_display_power(bus, true);
-		if (hda->need_i915_power)
-			snd_hdac_i915_set_bclk(bus);
-	}
-
 	if (chip->msi)
-		if (pci_enable_msi(pci) < 0)
+		if (pci_enable_msi(chip->pci) < 0)
 			chip->msi = 0;
 	if (azx_acquire_irq(chip, 1) < 0)
 		return -EIO;
-	azx_init_pci(chip);
-
-	hda_intel_init_chip(chip, true);
-
-	/* power down again for link-controlled chips */
-	if ((chip->driver_caps & AZX_DCAPS_I915_POWERWELL) &&
-	    !hda->need_i915_power)
-		snd_hdac_display_power(bus, false);
-
+	__azx_runtime_resume(chip);
 	snd_power_change_state(card, SNDRV_CTL_POWER_D0);
 
 	trace_azx_resume(chip);
@@ -1045,21 +1051,14 @@ static int azx_thaw_noirq(struct device *dev)
 }
 #endif /* CONFIG_PM_SLEEP */
 
-#ifdef CONFIG_PM
 static int azx_runtime_suspend(struct device *dev)
 {
 	struct snd_card *card = dev_get_drvdata(dev);
 	struct azx *chip;
-	struct hda_intel *hda;
 
-	if (!card)
+	if (!azx_is_pm_ready(card))
 		return 0;
-
 	chip = card->private_data;
-	hda = container_of(chip, struct hda_intel, chip);
-	if (chip->disabled || hda->init_failed)
-		return 0;
-
 	if (!azx_has_pm_runtime(chip))
 		return 0;
 
@@ -1067,13 +1066,7 @@ static int azx_runtime_suspend(struct device *dev)
 	azx_writew(chip, WAKEEN, azx_readw(chip, WAKEEN) |
 		  STATESTS_INT_MASK);
 
-	azx_stop_chip(chip);
-	azx_enter_link_reset(chip);
-	azx_clear_irq_pending(chip);
-	if ((chip->driver_caps & AZX_DCAPS_I915_POWERWELL)
-		&& hda->need_i915_power)
-		snd_hdac_display_power(azx_bus(chip), false);
-
+	__azx_runtime_suspend(chip);
 	trace_azx_runtime_suspend(chip);
 	return 0;
 }
@@ -1082,51 +1075,18 @@ static int azx_runtime_resume(struct device *dev)
 {
 	struct snd_card *card = dev_get_drvdata(dev);
 	struct azx *chip;
-	struct hda_intel *hda;
-	struct hdac_bus *bus;
-	struct hda_codec *codec;
-	int status;
 
-	if (!card)
+	if (!azx_is_pm_ready(card))
 		return 0;
-
 	chip = card->private_data;
-	hda = container_of(chip, struct hda_intel, chip);
-	bus = azx_bus(chip);
-	if (chip->disabled || hda->init_failed)
-		return 0;
-
 	if (!azx_has_pm_runtime(chip))
 		return 0;
-
-	if (chip->driver_caps & AZX_DCAPS_I915_POWERWELL) {
-		snd_hdac_display_power(bus, true);
-		if (hda->need_i915_power)
-			snd_hdac_i915_set_bclk(bus);
-	}
-
-	/* Read STATESTS before controller reset */
-	status = azx_readw(chip, STATESTS);
-
-	azx_init_pci(chip);
-	hda_intel_init_chip(chip, true);
-
-	if (status) {
-		list_for_each_codec(codec, &chip->bus)
-			if (status & (1 << codec->addr))
-				schedule_delayed_work(&codec->jackpoll_work,
-						      codec->jackpoll_interval);
-	}
+	__azx_runtime_resume(chip);
 
 	/* disable controller Wake Up event*/
 	azx_writew(chip, WAKEEN, azx_readw(chip, WAKEEN) &
 			~STATESTS_INT_MASK);
 
-	/* power down again for link-controlled chips */
-	if ((chip->driver_caps & AZX_DCAPS_I915_POWERWELL) &&
-	    !hda->need_i915_power)
-		snd_hdac_display_power(bus, false);
-
 	trace_azx_runtime_resume(chip);
 	return 0;
 }
@@ -1167,6 +1127,8 @@ static const struct dev_pm_ops azx_pm = {
 
 #define AZX_PM_OPS	&azx_pm
 #else
+#define azx_add_card_list(chip) /* NOP */
+#define azx_del_card_list(chip) /* NOP */
 #define AZX_PM_OPS	NULL
 #endif /* CONFIG_PM */
 
@@ -1374,11 +1336,8 @@ static int azx_free(struct azx *chip)
 #ifdef CONFIG_SND_HDA_PATCH_LOADER
 	release_firmware(chip->fw);
 #endif
+	display_power(chip, false);
 
-	if (chip->driver_caps & AZX_DCAPS_I915_POWERWELL) {
-		if (hda->need_i915_power)
-			snd_hdac_display_power(bus, false);
-	}
 	if (chip->driver_caps & AZX_DCAPS_I915_COMPONENT)
 		snd_hdac_i915_exit(bus);
 	kfree(hda);
@@ -1935,7 +1894,6 @@ static int azx_first_init(struct azx *chip)
 	/* initialize chip */
 	azx_init_pci(chip);
 
-	if (chip->driver_caps & AZX_DCAPS_I915_POWERWELL)
 	snd_hdac_i915_set_bclk(bus);
 
 	hda_intel_init_chip(chip, (probe_only[dev] & 2) == 0);
@@ -2078,7 +2036,6 @@ static const struct hda_controller_ops pci_hda_ops = {
 	.disable_msi_reset_irq = disable_msi_reset_irq,
 	.pcm_mmap_prepare = pcm_mmap_prepare,
 	.position_check = azx_position_check,
-	.link_power = azx_intel_link_power,
 };
 
 static int azx_probe(struct pci_dev *pci,
@@ -2245,10 +2202,13 @@ static int azx_probe_continue(struct azx *chip)
 				goto out_free;
 			} else {
 				/* don't bother any longer */
-				chip->driver_caps &=
-					~(AZX_DCAPS_I915_COMPONENT | AZX_DCAPS_I915_POWERWELL);
+				chip->driver_caps &= ~AZX_DCAPS_I915_COMPONENT;
 			}
 		}
+
+		/* HSW/BDW controllers need this power */
+		if (CONTROLLER_IN_GPU(pci))
+			hda->need_i915_power = 1;
 	}
 
 	/* Request display power well for the HDA controller or codec. For
@@ -2256,18 +2216,7 @@ static int azx_probe_continue(struct azx *chip)
 	 * this power. For other platforms, like Baytrail/Braswell, only the
 	 * display codec needs the power and it can be released after probe.
 	 */
-	if (chip->driver_caps & AZX_DCAPS_I915_POWERWELL) {
-		/* HSW/BDW controllers need this power */
-		if (CONTROLLER_IN_GPU(pci))
-			hda->need_i915_power = 1;
-
-		err = snd_hdac_display_power(bus, true);
-		if (err < 0) {
-			dev_err(chip->card->dev,
-				"Cannot turn on display power on i915\n");
-			goto i915_power_fail;
-		}
-	}
+	display_power(chip, true);
 
 	err = azx_first_init(chip);
 	if (err < 0)
@@ -2315,11 +2264,8 @@ static int azx_probe_continue(struct azx *chip)
 		pm_runtime_put_autosuspend(&pci->dev);
 
 out_free:
-	if ((chip->driver_caps & AZX_DCAPS_I915_POWERWELL)
-		&& !hda->need_i915_power)
-		snd_hdac_display_power(bus, false);
-
-i915_power_fail:
+	if (err < 0 || !hda->need_i915_power)
+		display_power(chip, false);
 	if (err < 0)
 		hda->init_failed = 1;
 	complete_all(&hda->probe_wait);

sound/pci/hda/patch_hdmi.c

@@ -2616,11 +2616,7 @@ static int intel_hsw_common_init(struct hda_codec *codec, hda_nid_t vendor_nid)
 	intel_haswell_enable_all_pins(codec, true);
 	intel_haswell_fixup_enable_dp12(codec);
 
-	/* For Haswell/Broadwell, the controller is also in the power well and
-	 * can cover the codec power request, and so need not set this flag.
-	 */
-	if (!is_haswell(codec) && !is_broadwell(codec))
-		codec->core.link_power_control = 1;
+	codec->display_power_control = 1;
 
 	codec->patch_ops.set_power_state = haswell_set_power_state;
 	codec->depop_delay = 0;
@@ -2656,7 +2652,7 @@ static int patch_i915_byt_hdmi(struct hda_codec *codec)
 	/* For Valleyview/Cherryview, only the display codec is in the display
 	 * power well and can use link_power ops to request/release the power.
 	 */
-	codec->core.link_power_control = 1;
+	codec->display_power_control = 1;
 
 	codec->depop_delay = 0;
 	codec->auto_runtime_pm = 1;

sound/soc/codecs/hdac_hdmi.c

@@ -2031,13 +2031,7 @@ static int hdac_hdmi_dev_probe(struct hdac_device *hdev)
 	 * Turned off in the runtime_suspend during the first explicit
 	 * pm_runtime_suspend call.
 	 */
-	ret = snd_hdac_display_power(hdev->bus, true);
-	if (ret < 0) {
-		dev_err(&hdev->dev,
-			"Cannot turn on display power on i915 err: %d\n",
-			ret);
-		return ret;
-	}
+	snd_hdac_display_power(hdev->bus, hdev->addr, true);
 
 	ret = hdac_hdmi_parse_and_map_nid(hdev, &hdmi_dais, &num_dais);
 	if (ret < 0) {
@@ -2065,6 +2059,8 @@ static int hdac_hdmi_dev_remove(struct hdac_device *hdev)
 	struct hdac_hdmi_port *port, *port_next;
 	int i;
 
+	snd_hdac_display_power(hdev->bus, hdev->addr, false);
+
 	list_for_each_entry_safe(pcm, pcm_next, &hdmi->pcm_list, head) {
 		pcm->cvt = NULL;
 		if (list_empty(&pcm->port_list))
@@ -2170,7 +2166,6 @@ static int hdac_hdmi_runtime_suspend(struct device *dev)
 	struct hdac_device *hdev = dev_to_hdac_dev(dev);
 	struct hdac_bus *bus = hdev->bus;
 	struct hdac_ext_link *hlink = NULL;
-	int err;
 
 	dev_dbg(dev, "Enter: %s\n", __func__);
 
@@ -2196,11 +2191,9 @@ static int hdac_hdmi_runtime_suspend(struct device *dev)
 
 	snd_hdac_ext_bus_link_put(bus, hlink);
 
-	err = snd_hdac_display_power(bus, false);
-	if (err < 0)
-		dev_err(dev, "Cannot turn off display power on i915\n");
+	snd_hdac_display_power(bus, hdev->addr, false);
 
-	return err;
+	return 0;
 }
 
 static int hdac_hdmi_runtime_resume(struct device *dev)
@@ -2208,7 +2201,6 @@ static int hdac_hdmi_runtime_resume(struct device *dev)
 	struct hdac_device *hdev = dev_to_hdac_dev(dev);
 	struct hdac_bus *bus = hdev->bus;
 	struct hdac_ext_link *hlink = NULL;
-	int err;
 
 	dev_dbg(dev, "Enter: %s\n", __func__);
 
@@ -2224,11 +2216,7 @@ static int hdac_hdmi_runtime_resume(struct device *dev)
 
 	snd_hdac_ext_bus_link_get(bus, hlink);
 
-	err = snd_hdac_display_power(bus, true);
-	if (err < 0) {
-		dev_err(dev, "Cannot turn on display power on i915\n");
-		return err;
-	}
+	snd_hdac_display_power(bus, hdev->addr, true);
 
 	hdac_hdmi_skl_enable_all_pins(hdev);
 	hdac_hdmi_skl_enable_dp12(hdev);

sound/soc/intel/skylake/skl.c

@@ -311,7 +311,7 @@ static int skl_suspend(struct device *dev)
 	struct pci_dev *pci = to_pci_dev(dev);
 	struct hdac_bus *bus = pci_get_drvdata(pci);
 	struct skl *skl  = bus_to_skl(bus);
-	int ret = 0;
+	int ret;
 
 	/*
 	 * Do not suspend if streams which are marked ignore suspend are
@@ -333,14 +333,10 @@ static int skl_suspend(struct device *dev)
 		skl->skl_sst->fw_loaded = false;
 	}
 
-	if (IS_ENABLED(CONFIG_SND_SOC_HDAC_HDMI)) {
-		ret = snd_hdac_display_power(bus, false);
-		if (ret < 0)
-			dev_err(bus->dev,
-				"Cannot turn OFF display power on i915\n");
-	}
+	if (IS_ENABLED(CONFIG_SND_SOC_HDAC_HDMI))
+		snd_hdac_display_power(bus, HDA_CODEC_IDX_CONTROLLER, false);
 
-	return ret;
+	return 0;
 }
 
 static int skl_resume(struct device *dev)
@@ -352,14 +348,8 @@ static int skl_resume(struct device *dev)
 	int ret;
 
 	/* Turned OFF in HDMI codec driver after codec reconfiguration */
-	if (IS_ENABLED(CONFIG_SND_SOC_HDAC_HDMI)) {
-		ret = snd_hdac_display_power(bus, true);
-		if (ret < 0) {
-			dev_err(bus->dev,
-				"Cannot turn on display power on i915\n");
-			return ret;
-		}
-	}
+	if (IS_ENABLED(CONFIG_SND_SOC_HDAC_HDMI))
+		snd_hdac_display_power(bus, HDA_CODEC_IDX_CONTROLLER, true);
 
 	/*
 	 * resume only when we are not in suspend active, otherwise need to
@@ -783,11 +773,9 @@ static int skl_i915_init(struct hdac_bus *bus)
 	if (err < 0)
 		return err;
 
-	err = snd_hdac_display_power(bus, true);
-	if (err < 0)
-		dev_err(bus->dev, "Cannot turn on display power on i915\n");
+	snd_hdac_display_power(bus, HDA_CODEC_IDX_CONTROLLER, true);
 
-	return err;
+	return 0;
 }
 
 static void skl_probe_work(struct work_struct *work)
@@ -837,14 +825,8 @@ static void skl_probe_work(struct work_struct *work)
 	list_for_each_entry(hlink, &bus->hlink_list, list)
 		snd_hdac_ext_bus_link_put(bus, hlink);
 
-	if (IS_ENABLED(CONFIG_SND_SOC_HDAC_HDMI)) {
-		err = snd_hdac_display_power(bus, false);
-		if (err < 0) {
-			dev_err(bus->dev, "Cannot turn off display power on i915\n");
-			skl_machine_device_unregister(skl);
-			return;
-		}
-	}
+	if (IS_ENABLED(CONFIG_SND_SOC_HDAC_HDMI))
+		snd_hdac_display_power(bus, HDA_CODEC_IDX_CONTROLLER, false);
 
 	/* configure PM */
 	pm_runtime_put_noidle(bus->dev);
@@ -855,7 +837,7 @@ static void skl_probe_work(struct work_struct *work)
 
 out_err:
 	if (IS_ENABLED(CONFIG_SND_SOC_HDAC_HDMI))
-		err = snd_hdac_display_power(bus, false);
+		snd_hdac_display_power(bus, HDA_CODEC_IDX_CONTROLLER, false);
 }
 
 /*