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ALSA: hda - Move hda_i915.c from sound/pci/hda to sound/hda 

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@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Mengdong Lin 2015-05-19 22:29:30 +08:00 коммит произвёл Takashi Iwai
Родитель 4214c5349c
Коммит 98d8fc6c5d
11 изменённых файлов: 313 добавлений и 280 удалений
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36
include/sound/hda_i915.h Normal file
Просмотреть файл

@ -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 */

4
include/sound/hda_register.h
Просмотреть файл

@ -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

5
include/sound/hdaudio.h
Просмотреть файл

@ -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,

6
sound/hda/Kconfig
Просмотреть файл

@ -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

3
sound/hda/Makefile
Просмотреть файл

@ -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

193
sound/hda/hdac_i915.c Normal file
Просмотреть файл

@ -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);

5
sound/pci/hda/Kconfig
Просмотреть файл

@ -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

2
sound/pci/hda/Makefile
Просмотреть файл

@ -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

227
sound/pci/hda/hda_i915.c
Просмотреть файл

@ -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;
}

82
sound/pci/hda/hda_intel.c
Просмотреть файл

@ -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)

30
sound/pci/hda/hda_intel.h
Просмотреть файл

@ -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