[alsa-devel] [PATCH v2] ALSA: hda - Move hda_i915.c from sound/pci/hda to sound/hda

Takashi Iwai tiwai at suse.de
Wed May 20 06:21:36 CEST 2015


At Tue, 19 May 2015 22:29:30 +0800,
mengdong.lin at intel.com wrote:
> 
> From: Mengdong Lin <mengdong.lin at intel.com>
> 
> The file is moved to hda core and renamed to hdac_i915.c, so can be used
> by both legacy HDA driver and new Skylake audio driver.
> 
> - Add snd_hdac_ prefix to the public APIs.
> - The i915 audio component is moved to core bus and dynamically allocated.
> - A static pointer hdac_acomp is used to help bind/unbind callbacks to get
>   this component, because the sound card's private_data is used by the azx
>   chip pointer, which is a legacy structure. It could be removed if private
>   _data changes to some core structure which can be extended to find the
>   bus.
> - snd_hdac_get_display_clk() is added to get the display core clock for
>   HSW/BDW.
> - haswell_set_bclk() is moved to hda_intel.c because it needs to write the
>   controller registers EM4/EM5, and only legacy HD-A needs it for HSW/BDW.
> - Move definition of HSW/BDW-specific registers EM4/EM5 to hda_register.h
>   and rename them to HSW_EM4/HSW_EM5, because other HD-A controllers have
>   different layout for the extended mode registers.
> 
> Signed-off-by: Mengdong Lin <mengdong.lin at intel.com>

Applied, thanks.


Takashi

> 
> diff --git a/include/sound/hda_i915.h b/include/sound/hda_i915.h
> new file mode 100644
> index 0000000..adb5ba5
> --- /dev/null
> +++ b/include/sound/hda_i915.h
> @@ -0,0 +1,36 @@
> +/*
> + * HD-Audio helpers to sync with i915 driver
> + */
> +#ifndef __SOUND_HDA_I915_H
> +#define __SOUND_HDA_I915_H
> +
> +#ifdef CONFIG_SND_HDA_I915
> +int snd_hdac_set_codec_wakeup(struct hdac_bus *bus, bool enable);
> +int snd_hdac_display_power(struct hdac_bus *bus, bool enable);
> +int snd_hdac_get_display_clk(struct hdac_bus *bus);
> +int snd_hdac_i915_init(struct hdac_bus *bus);
> +int snd_hdac_i915_exit(struct hdac_bus *bus);
> +#else
> +static 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)
> +{
> +	return 0;
> +}
> +static inline int snd_hdac_get_display_clk(struct hdac_bus *bus)
> +{
> +	return 0;
> +}
> +static inline int snd_hdac_i915_init(struct hdac_bus *bus)
> +{
> +	return -ENODEV;
> +}
> +static inline int snd_hdac_i915_exit(struct hdac_bus *bus)
> +{
> +	return 0;
> +}
> +#endif
> +
> +#endif /* __SOUND_HDA_I915_H */
> diff --git a/include/sound/hda_register.h b/include/sound/hda_register.h
> index 4f6d3fc..0c7536e 100644
> --- a/include/sound/hda_register.h
> +++ b/include/sound/hda_register.h
> @@ -84,6 +84,10 @@ enum { SDI0, SDI1, SDI2, SDI3, SDO0, SDO1, SDO2, SDO3 };
>  #define AZX_REG_SD_BDLPL		0x18
>  #define AZX_REG_SD_BDLPU		0x1c
>  
> +/* Haswell/Broadwell display HD-A controller Extended Mode registers */
> +#define AZX_REG_HSW_EM4			0x100c
> +#define AZX_REG_HSW_EM5			0x1010
> +
>  /* PCI space */
>  #define AZX_PCIREG_TCSEL		0x44
>  
> diff --git a/include/sound/hdaudio.h b/include/sound/hdaudio.h
> index b97c59e..64fff4d 100644
> --- a/include/sound/hdaudio.h
> +++ b/include/sound/hdaudio.h
> @@ -11,6 +11,7 @@
>  #include <sound/core.h>
>  #include <sound/memalloc.h>
>  #include <sound/hda_verbs.h>
> +#include <drm/i915_component.h>
>  
>  /* codec node id */
>  typedef u16 hda_nid_t;
> @@ -285,6 +286,10 @@ struct hdac_bus {
>  	/* locks */
>  	spinlock_t reg_lock;
>  	struct mutex cmd_mutex;
> +
> +	/* i915 component interface */
> +	struct i915_audio_component *audio_component;
> +	int i915_power_refcount;
>  };
>  
>  int snd_hdac_bus_init(struct hdac_bus *bus, struct device *dev,
> diff --git a/sound/hda/Kconfig b/sound/hda/Kconfig
> index 7a17fca..ac5ffac 100644
> --- a/sound/hda/Kconfig
> +++ b/sound/hda/Kconfig
> @@ -4,3 +4,9 @@ config SND_HDA_CORE
>  
>  config SND_HDA_DSP_LOADER
>  	bool
> +
> +config SND_HDA_I915
> +	bool
> +	default y
> +	depends on DRM_I915
> +	depends on SND_HDA_CORE
> diff --git a/sound/hda/Makefile b/sound/hda/Makefile
> index 5b4bb47..55dd465 100644
> --- a/sound/hda/Makefile
> +++ b/sound/hda/Makefile
> @@ -4,4 +4,7 @@ snd-hda-core-objs := hda_bus_type.o hdac_bus.o hdac_device.o hdac_sysfs.o \
>  snd-hda-core-objs += trace.o
>  CFLAGS_trace.o := -I$(src)
>  
> +# for sync with i915 gfx driver
> +snd-hda-core-$(CONFIG_SND_HDA_I915) += hdac_i915.o
> +
>  obj-$(CONFIG_SND_HDA_CORE) += snd-hda-core.o
> diff --git a/sound/hda/hdac_i915.c b/sound/hda/hdac_i915.c
> new file mode 100644
> index 0000000..cb78c25
> --- /dev/null
> +++ b/sound/hda/hdac_i915.c
> @@ -0,0 +1,193 @@
> +/*
> + *  hdac_i915.c - routines for sync between HD-A core and i915 display driver
> + *
> + *  This program is free software; you can redistribute it and/or modify it
> + *  under the terms of the GNU General Public License as published by the Free
> + *  Software Foundation; either version 2 of the License, or (at your option)
> + *  any later version.
> + *
> + *  This program is distributed in the hope that it will be useful, but
> + *  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
> + *  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
> + *  for more details.
> + */
> +
> +#include <linux/init.h>
> +#include <linux/module.h>
> +#include <linux/pci.h>
> +#include <linux/component.h>
> +#include <drm/i915_component.h>
> +#include <sound/core.h>
> +#include <sound/hdaudio.h>
> +#include <sound/hda_i915.h>
> +
> +static struct i915_audio_component *hdac_acomp;
> +
> +int snd_hdac_set_codec_wakeup(struct hdac_bus *bus, bool enable)
> +{
> +	struct i915_audio_component *acomp = bus->audio_component;
> +
> +	if (!acomp->ops)
> +		return -ENODEV;
> +
> +	if (!acomp->ops->codec_wake_override) {
> +		dev_warn(bus->dev,
> +			"Invalid codec wake callback\n");
> +		return 0;
> +	}
> +
> +	dev_dbg(bus->dev, "%s codec wakeup\n",
> +		enable ? "enable" : "disable");
> +
> +	acomp->ops->codec_wake_override(acomp->dev, enable);
> +
> +	return 0;
> +}
> +EXPORT_SYMBOL_GPL(snd_hdac_set_codec_wakeup);
> +
> +int snd_hdac_display_power(struct hdac_bus *bus, bool enable)
> +{
> +	struct i915_audio_component *acomp = bus->audio_component;
> +
> +	if (!acomp->ops)
> +		return -ENODEV;
> +
> +	dev_dbg(bus->dev, "display power %s\n",
> +		enable ? "enable" : "disable");
> +
> +	if (enable) {
> +		if (!bus->i915_power_refcount++)
> +			acomp->ops->get_power(acomp->dev);
> +	} else {
> +		WARN_ON(!bus->i915_power_refcount);
> +		if (!--bus->i915_power_refcount)
> +			acomp->ops->put_power(acomp->dev);
> +	}
> +
> +	return 0;
> +}
> +EXPORT_SYMBOL_GPL(snd_hdac_display_power);
> +
> +int snd_hdac_get_display_clk(struct hdac_bus *bus)
> +{
> +	struct i915_audio_component *acomp = bus->audio_component;
> +
> +	if (!acomp->ops)
> +		return -ENODEV;
> +
> +	return acomp->ops->get_cdclk_freq(acomp->dev);
> +}
> +EXPORT_SYMBOL_GPL(snd_hdac_get_display_clk);
> +
> +static int hdac_component_master_bind(struct device *dev)
> +{
> +	struct i915_audio_component *acomp = hdac_acomp;
> +	int ret;
> +
> +	ret = component_bind_all(dev, acomp);
> +	if (ret < 0)
> +		return ret;
> +
> +	if (WARN_ON(!(acomp->dev && acomp->ops && acomp->ops->get_power &&
> +		      acomp->ops->put_power && acomp->ops->get_cdclk_freq))) {
> +		ret = -EINVAL;
> +		goto out_unbind;
> +	}
> +
> +	/*
> +	 * Atm, we don't support dynamic unbinding initiated by the child
> +	 * component, so pin its containing module until we unbind.
> +	 */
> +	if (!try_module_get(acomp->ops->owner)) {
> +		ret = -ENODEV;
> +		goto out_unbind;
> +	}
> +
> +	return 0;
> +
> +out_unbind:
> +	component_unbind_all(dev, acomp);
> +
> +	return ret;
> +}
> +
> +static void hdac_component_master_unbind(struct device *dev)
> +{
> +	struct i915_audio_component *acomp = hdac_acomp;
> +
> +	module_put(acomp->ops->owner);
> +	component_unbind_all(dev, acomp);
> +	WARN_ON(acomp->ops || acomp->dev);
> +}
> +
> +static const struct component_master_ops hdac_component_master_ops = {
> +	.bind = hdac_component_master_bind,
> +	.unbind = hdac_component_master_unbind,
> +};
> +
> +static int hdac_component_master_match(struct device *dev, void *data)
> +{
> +	/* i915 is the only supported component */
> +	return !strcmp(dev->driver->name, "i915");
> +}
> +
> +int snd_hdac_i915_init(struct hdac_bus *bus)
> +{
> +	struct component_match *match = NULL;
> +	struct device *dev = bus->dev;
> +	struct i915_audio_component *acomp;
> +	int ret;
> +
> +	acomp = kzalloc(sizeof(*acomp), GFP_KERNEL);
> +	if (!acomp)
> +		return -ENOMEM;
> +	bus->audio_component = acomp;
> +	hdac_acomp = acomp;
> +
> +	component_match_add(dev, &match, hdac_component_master_match, bus);
> +	ret = component_master_add_with_match(dev, &hdac_component_master_ops,
> +					      match);
> +	if (ret < 0)
> +		goto out_err;
> +
> +	/*
> +	 * Atm, we don't support deferring the component binding, so make sure
> +	 * i915 is loaded and that the binding successfully completes.
> +	 */
> +	request_module("i915");
> +
> +	if (!acomp->ops) {
> +		ret = -ENODEV;
> +		goto out_master_del;
> +	}
> +	dev_dbg(dev, "bound to i915 component master\n");
> +
> +	return 0;
> +out_master_del:
> +	component_master_del(dev, &hdac_component_master_ops);
> +out_err:
> +	kfree(acomp);
> +	bus->audio_component = NULL;
> +	dev_err(dev, "failed to add i915 component master (%d)\n", ret);
> +
> +	return ret;
> +}
> +EXPORT_SYMBOL_GPL(snd_hdac_i915_init);
> +
> +int snd_hdac_i915_exit(struct hdac_bus *bus)
> +{
> +	struct device *dev = bus->dev;
> +	struct i915_audio_component *acomp = bus->audio_component;
> +
> +	WARN_ON(bus->i915_power_refcount);
> +	if (bus->i915_power_refcount > 0 && acomp && acomp->ops)
> +		acomp->ops->put_power(acomp->dev);
> +
> +	component_master_del(dev, &hdac_component_master_ops);
> +
> +	kfree(acomp);
> +	bus->audio_component = NULL;
> +
> +	return 0;
> +}
> +EXPORT_SYMBOL_GPL(snd_hdac_i915_exit);
> diff --git a/sound/pci/hda/Kconfig b/sound/pci/hda/Kconfig
> index 117bf5c..98ced97 100644
> --- a/sound/pci/hda/Kconfig
> +++ b/sound/pci/hda/Kconfig
> @@ -145,11 +145,6 @@ config SND_HDA_CODEC_HDMI
>  comment "Set to Y if you want auto-loading the codec driver"
>  	depends on SND_HDA=y && SND_HDA_CODEC_HDMI=m
>  
> -config SND_HDA_I915
> -	bool
> -	default y
> -	depends on DRM_I915
> -
>  config SND_HDA_CODEC_CIRRUS
>  	tristate "Build Cirrus Logic codec support"
>  	select SND_HDA_GENERIC
> diff --git a/sound/pci/hda/Makefile b/sound/pci/hda/Makefile
> index 9c259ce..90e69b2 100644
> --- a/sound/pci/hda/Makefile
> +++ b/sound/pci/hda/Makefile
> @@ -1,7 +1,5 @@
>  snd-hda-intel-objs := hda_intel.o
>  snd-hda-tegra-objs := hda_tegra.o
> -# for haswell power well
> -snd-hda-intel-$(CONFIG_SND_HDA_I915) +=	hda_i915.o
>  
>  snd-hda-codec-y := hda_bind.o hda_codec.o hda_jack.o hda_auto_parser.o hda_sysfs.o
>  snd-hda-codec-y += hda_controller.o
> diff --git a/sound/pci/hda/hda_i915.c b/sound/pci/hda/hda_i915.c
> deleted file mode 100644
> index 8521702..0000000
> --- a/sound/pci/hda/hda_i915.c
> +++ /dev/null
> @@ -1,227 +0,0 @@
> -/*
> - *  hda_i915.c - routines for Haswell HDA controller power well support
> - *
> - *  This program is free software; you can redistribute it and/or modify it
> - *  under the terms of the GNU General Public License as published by the Free
> - *  Software Foundation; either version 2 of the License, or (at your option)
> - *  any later version.
> - *
> - *  This program is distributed in the hope that it will be useful, but
> - *  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
> - *  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
> - *  for more details.
> - *
> - *  You should have received a copy of the GNU General Public License
> - *  along with this program; if not, write to the Free Software Foundation,
> - *  Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
> - */
> -
> -#include <linux/init.h>
> -#include <linux/module.h>
> -#include <linux/pci.h>
> -#include <linux/component.h>
> -#include <drm/i915_component.h>
> -#include <sound/core.h>
> -#include "hda_controller.h"
> -#include "hda_intel.h"
> -
> -/* Intel HSW/BDW display HDA controller Extended Mode registers.
> - * EM4 (M value) and EM5 (N Value) are used to convert CDClk (Core Display
> - * Clock) to 24MHz BCLK: BCLK = CDCLK * M / N
> - * The values will be lost when the display power well is disabled.
> - */
> -#define AZX_REG_EM4			0x100c
> -#define AZX_REG_EM5			0x1010
> -
> -int hda_set_codec_wakeup(struct hda_intel *hda, bool enable)
> -{
> -	struct i915_audio_component *acomp = &hda->audio_component;
> -
> -	if (!acomp->ops)
> -		return -ENODEV;
> -
> -	if (!acomp->ops->codec_wake_override) {
> -		dev_warn(&hda->chip.pci->dev,
> -			"Invalid codec wake callback\n");
> -		return 0;
> -	}
> -
> -	dev_dbg(&hda->chip.pci->dev, "%s codec wakeup\n",
> -		enable ? "enable" : "disable");
> -
> -	acomp->ops->codec_wake_override(acomp->dev, enable);
> -
> -	return 0;
> -}
> -
> -int hda_display_power(struct hda_intel *hda, bool enable)
> -{
> -	struct i915_audio_component *acomp = &hda->audio_component;
> -
> -	if (!acomp->ops)
> -		return -ENODEV;
> -
> -	dev_dbg(&hda->chip.pci->dev, "display power %s\n",
> -		enable ? "enable" : "disable");
> -
> -	if (enable) {
> -		if (!hda->i915_power_refcount++)
> -			acomp->ops->get_power(acomp->dev);
> -	} else {
> -		WARN_ON(!hda->i915_power_refcount);
> -		if (!--hda->i915_power_refcount)
> -			acomp->ops->put_power(acomp->dev);
> -	}
> -
> -	return 0;
> -}
> -
> -void haswell_set_bclk(struct hda_intel *hda)
> -{
> -	int cdclk_freq;
> -	unsigned int bclk_m, bclk_n;
> -	struct i915_audio_component *acomp = &hda->audio_component;
> -	struct pci_dev *pci = hda->chip.pci;
> -
> -	/* Only Haswell/Broadwell need set BCLK */
> -	if (pci->device != 0x0a0c && pci->device != 0x0c0c
> -	   && pci->device != 0x0d0c && pci->device != 0x160c)
> -		return;
> -
> -	if (!acomp->ops)
> -		return;
> -
> -	cdclk_freq = acomp->ops->get_cdclk_freq(acomp->dev);
> -	switch (cdclk_freq) {
> -	case 337500:
> -		bclk_m = 16;
> -		bclk_n = 225;
> -		break;
> -
> -	case 450000:
> -	default: /* default CDCLK 450MHz */
> -		bclk_m = 4;
> -		bclk_n = 75;
> -		break;
> -
> -	case 540000:
> -		bclk_m = 4;
> -		bclk_n = 90;
> -		break;
> -
> -	case 675000:
> -		bclk_m = 8;
> -		bclk_n = 225;
> -		break;
> -	}
> -
> -	azx_writew(&hda->chip, EM4, bclk_m);
> -	azx_writew(&hda->chip, EM5, bclk_n);
> -}
> -
> -static int hda_component_master_bind(struct device *dev)
> -{
> -	struct snd_card *card = dev_get_drvdata(dev);
> -	struct azx *chip = card->private_data;
> -	struct hda_intel *hda = container_of(chip, struct hda_intel, chip);
> -	struct i915_audio_component *acomp = &hda->audio_component;
> -	int ret;
> -
> -	ret = component_bind_all(dev, acomp);
> -	if (ret < 0)
> -		return ret;
> -
> -	if (WARN_ON(!(acomp->dev && acomp->ops && acomp->ops->get_power &&
> -		      acomp->ops->put_power && acomp->ops->get_cdclk_freq))) {
> -		ret = -EINVAL;
> -		goto out_unbind;
> -	}
> -
> -	/*
> -	 * Atm, we don't support dynamic unbinding initiated by the child
> -	 * component, so pin its containing module until we unbind.
> -	 */
> -	if (!try_module_get(acomp->ops->owner)) {
> -		ret = -ENODEV;
> -		goto out_unbind;
> -	}
> -
> -	return 0;
> -
> -out_unbind:
> -	component_unbind_all(dev, acomp);
> -
> -	return ret;
> -}
> -
> -static void hda_component_master_unbind(struct device *dev)
> -{
> -	struct snd_card *card = dev_get_drvdata(dev);
> -	struct azx *chip = card->private_data;
> -	struct hda_intel *hda = container_of(chip, struct hda_intel, chip);
> -	struct i915_audio_component *acomp = &hda->audio_component;
> -
> -	module_put(acomp->ops->owner);
> -	component_unbind_all(dev, acomp);
> -	WARN_ON(acomp->ops || acomp->dev);
> -}
> -
> -static const struct component_master_ops hda_component_master_ops = {
> -	.bind = hda_component_master_bind,
> -	.unbind = hda_component_master_unbind,
> -};
> -
> -static int hda_component_master_match(struct device *dev, void *data)
> -{
> -	/* i915 is the only supported component */
> -	return !strcmp(dev->driver->name, "i915");
> -}
> -
> -int hda_i915_init(struct hda_intel *hda)
> -{
> -	struct component_match *match = NULL;
> -	struct device *dev = &hda->chip.pci->dev;
> -	struct i915_audio_component *acomp = &hda->audio_component;
> -	int ret;
> -
> -	component_match_add(dev, &match, hda_component_master_match, hda);
> -	ret = component_master_add_with_match(dev, &hda_component_master_ops,
> -					      match);
> -	if (ret < 0)
> -		goto out_err;
> -
> -	/*
> -	 * Atm, we don't support deferring the component binding, so make sure
> -	 * i915 is loaded and that the binding successfully completes.
> -	 */
> -	request_module("i915");
> -
> -	if (!acomp->ops) {
> -		ret = -ENODEV;
> -		goto out_master_del;
> -	}
> -
> -	dev_dbg(dev, "bound to i915 component master\n");
> -
> -	return 0;
> -out_master_del:
> -	component_master_del(dev, &hda_component_master_ops);
> -out_err:
> -	dev_err(dev, "failed to add i915 component master (%d)\n", ret);
> -
> -	return ret;
> -}
> -
> -int hda_i915_exit(struct hda_intel *hda)
> -{
> -	struct device *dev = &hda->chip.pci->dev;
> -	struct i915_audio_component *acomp = &hda->audio_component;
> -
> -	WARN_ON(hda->i915_power_refcount);
> -	if (hda->i915_power_refcount > 0 && acomp->ops)
> -		acomp->ops->put_power(acomp->dev);
> -
> -	component_master_del(dev, &hda_component_master_ops);
> -
> -	return 0;
> -}
> diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
> index 5c84d40..391e4f8 100644
> --- a/sound/pci/hda/hda_intel.c
> +++ b/sound/pci/hda/hda_intel.c
> @@ -57,6 +57,8 @@
>  #endif
>  #include <sound/core.h>
>  #include <sound/initval.h>
> +#include <sound/hdaudio.h>
> +#include <sound/hda_i915.h>
>  #include <linux/vgaarb.h>
>  #include <linux/vga_switcheroo.h>
>  #include <linux/firmware.h>
> @@ -496,13 +498,13 @@ static void azx_init_pci(struct azx *chip)
>  
>  static void hda_intel_init_chip(struct azx *chip, bool full_reset)
>  {
> -	struct hda_intel *hda = container_of(chip, struct hda_intel, chip);
> +	struct hdac_bus *bus = azx_bus(chip);
>  
>  	if (chip->driver_caps & AZX_DCAPS_I915_POWERWELL)
> -		hda_set_codec_wakeup(hda, true);
> +		snd_hdac_set_codec_wakeup(bus, true);
>  	azx_init_chip(chip, full_reset);
>  	if (chip->driver_caps & AZX_DCAPS_I915_POWERWELL)
> -		hda_set_codec_wakeup(hda, false);
> +		snd_hdac_set_codec_wakeup(bus, false);
>  }
>  
>  /* calculate runtime delay from LPIB */
> @@ -560,9 +562,9 @@ static int azx_position_check(struct azx *chip, struct azx_dev *azx_dev)
>  /* Enable/disable i915 display power for the link */
>  static int azx_intel_link_power(struct azx *chip, bool enable)
>  {
> -	struct hda_intel *hda = container_of(chip, struct hda_intel, chip);
> +	struct hdac_bus *bus = azx_bus(chip);
>  
> -	return hda_display_power(hda, enable);
> +	return snd_hdac_display_power(bus, enable);
>  }
>  
>  /*
> @@ -800,6 +802,50 @@ static int param_set_xint(const char *val, const struct kernel_param *kp)
>  #define azx_del_card_list(chip) /* NOP */
>  #endif /* CONFIG_PM */
>  
> +/* Intel HSW/BDW display HDA controller is in GPU. Both its power and link BCLK
> + * depends on GPU. Two Extended Mode registers EM4 (M value) and EM5 (N Value)
> + * are used to convert CDClk (Core Display Clock) to 24MHz BCLK:
> + * BCLK = CDCLK * M / N
> + * The values will be lost when the display power well is disabled and need to
> + * be restored to avoid abnormal playback speed.
> + */
> +static void haswell_set_bclk(struct hda_intel *hda)
> +{
> +	struct azx *chip = &hda->chip;
> +	int cdclk_freq;
> +	unsigned int bclk_m, bclk_n;
> +
> +	if (!hda->need_i915_power)
> +		return;
> +
> +	cdclk_freq = snd_hdac_get_display_clk(azx_bus(chip));
> +	switch (cdclk_freq) {
> +	case 337500:
> +		bclk_m = 16;
> +		bclk_n = 225;
> +		break;
> +
> +	case 450000:
> +	default: /* default CDCLK 450MHz */
> +		bclk_m = 4;
> +		bclk_n = 75;
> +		break;
> +
> +	case 540000:
> +		bclk_m = 4;
> +		bclk_n = 90;
> +		break;
> +
> +	case 675000:
> +		bclk_m = 8;
> +		bclk_n = 225;
> +		break;
> +	}
> +
> +	azx_writew(chip, HSW_EM4, bclk_m);
> +	azx_writew(chip, HSW_EM5, bclk_n);
> +}
> +
>  #if defined(CONFIG_PM_SLEEP) || defined(SUPPORT_VGA_SWITCHEROO)
>  /*
>   * power management
> @@ -833,7 +879,7 @@ static int azx_suspend(struct device *dev)
>  		pci_disable_msi(chip->pci);
>  	if (chip->driver_caps & AZX_DCAPS_I915_POWERWELL
>  		&& hda->need_i915_power)
> -		hda_display_power(hda, false);
> +		snd_hdac_display_power(bus, false);
>  
>  	trace_azx_suspend(chip);
>  	return 0;
> @@ -856,7 +902,7 @@ static int azx_resume(struct device *dev)
>  
>  	if (chip->driver_caps & AZX_DCAPS_I915_POWERWELL
>  		&& hda->need_i915_power) {
> -		hda_display_power(hda, true);
> +		snd_hdac_display_power(azx_bus(chip), true);
>  		haswell_set_bclk(hda);
>  	}
>  	if (chip->msi)
> @@ -902,7 +948,7 @@ static int azx_runtime_suspend(struct device *dev)
>  	azx_clear_irq_pending(chip);
>  	if (chip->driver_caps & AZX_DCAPS_I915_POWERWELL
>  		&& hda->need_i915_power)
> -		hda_display_power(hda, false);
> +		snd_hdac_display_power(azx_bus(chip), false);
>  
>  	trace_azx_runtime_suspend(chip);
>  	return 0;
> @@ -913,6 +959,7 @@ 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;
>  
> @@ -929,11 +976,12 @@ static int azx_runtime_resume(struct device *dev)
>  
>  	if (chip->driver_caps & AZX_DCAPS_I915_POWERWELL
>  		&& hda->need_i915_power) {
> -		hda_display_power(hda, true);
> +		bus =  azx_bus(chip);
> +		snd_hdac_display_power(bus, true);
>  		haswell_set_bclk(hda);
>  		/* toggle codec wakeup bit for STATESTS read */
> -		hda_set_codec_wakeup(hda, true);
> -		hda_set_codec_wakeup(hda, false);
> +		snd_hdac_set_codec_wakeup(bus, true);
> +		snd_hdac_set_codec_wakeup(bus, false);
>  	}
>  
>  	/* Read STATESTS before controller reset */
> @@ -1152,10 +1200,11 @@ static int azx_free(struct azx *chip)
>  #ifdef CONFIG_SND_HDA_PATCH_LOADER
>  	release_firmware(chip->fw);
>  #endif
> +
>  	if (chip->driver_caps & AZX_DCAPS_I915_POWERWELL) {
>  		if (hda->need_i915_power)
> -			hda_display_power(hda, false);
> -		hda_i915_exit(hda);
> +			snd_hdac_display_power(bus, false);
> +		snd_hdac_i915_exit(bus);
>  	}
>  	kfree(hda);
>  
> @@ -1914,6 +1963,7 @@ static unsigned int azx_max_codecs[AZX_NUM_DRIVERS] = {
>  static int azx_probe_continue(struct azx *chip)
>  {
>  	struct hda_intel *hda = container_of(chip, struct hda_intel, chip);
> +	struct hdac_bus *bus = azx_bus(chip);
>  	struct pci_dev *pci = chip->pci;
>  	int dev = chip->dev_index;
>  	int err;
> @@ -1930,11 +1980,11 @@ static int azx_probe_continue(struct azx *chip)
>  		if (pci->device != 0x0f04 && pci->device != 0x2284)
>  			hda->need_i915_power = 1;
>  
> -		err = hda_i915_init(hda);
> +		err = snd_hdac_i915_init(bus);
>  		if (err < 0)
>  			goto i915_power_fail;
>  
> -		err = hda_display_power(hda, true);
> +		err = snd_hdac_display_power(bus, true);
>  		if (err < 0) {
>  			dev_err(chip->card->dev,
>  				"Cannot turn on display power on i915\n");
> @@ -1986,7 +2036,7 @@ static int azx_probe_continue(struct azx *chip)
>  out_free:
>  	if (chip->driver_caps & AZX_DCAPS_I915_POWERWELL
>  		&& !hda->need_i915_power)
> -		hda_display_power(hda, false);
> +		snd_hdac_display_power(bus, false);
>  
>  i915_power_fail:
>  	if (err < 0)
> diff --git a/sound/pci/hda/hda_intel.h b/sound/pci/hda/hda_intel.h
> index 7fd3254..354f0bb 100644
> --- a/sound/pci/hda/hda_intel.h
> +++ b/sound/pci/hda/hda_intel.h
> @@ -16,7 +16,6 @@
>  #ifndef __SOUND_HDA_INTEL_H
>  #define __SOUND_HDA_INTEL_H
>  
> -#include <drm/i915_component.h>
>  #include "hda_controller.h"
>  
>  struct hda_intel {
> @@ -44,36 +43,7 @@ struct hda_intel {
>  	/* secondary power domain for hdmi audio under vga device */
>  	struct dev_pm_domain hdmi_pm_domain;
>  
> -	/* i915 component interface */
>  	bool need_i915_power:1; /* the hda controller needs i915 power */
> -	struct i915_audio_component audio_component;
> -	int i915_power_refcount;
>  };
>  
> -#ifdef CONFIG_SND_HDA_I915
> -int hda_set_codec_wakeup(struct hda_intel *hda, bool enable);
> -int hda_display_power(struct hda_intel *hda, bool enable);
> -void haswell_set_bclk(struct hda_intel *hda);
> -int hda_i915_init(struct hda_intel *hda);
> -int hda_i915_exit(struct hda_intel *hda);
> -#else
> -static inline int hda_set_codec_wakeup(struct hda_intel *hda, bool enable)
> -{
> -	return 0;
> -}
> -static inline int hda_display_power(struct hda_intel *hda, bool enable)
> -{
> -	return 0;
> -}
> -static inline void haswell_set_bclk(struct hda_intel *hda) { return; }
> -static inline int hda_i915_init(struct hda_intel *hda)
> -{
> -	return 0;
> -}
> -static inline int hda_i915_exit(struct hda_intel *hda)
> -{
> -	return 0;
> -}
> -#endif
> -
>  #endif
> -- 
> 1.9.1
> 


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