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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 committed by Takashi Iwai
parent 4214c5349c
commit 98d8fc6c5d
11 changed files with 313 additions and 280 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

36
include/sound/hda_i915.h Normal file
View File

@ -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
View File

@ -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
View File

@ -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
View File

@ -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
View File

@ -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
View File

@ -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
View File

@ -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
View File

@ -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
View File

@ -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
View File

@ -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
View File

@ -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