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Commit f71d4af4 authored by Jesse Barnes's avatar Jesse Barnes Committed by Keith Packard
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drm/i915: move IRQ function table init to i915_irq.c 

This lets us make the various IRQ functions static and helps avoid
problems like the one fixed in "drm/i915: Use chipset-specific irq
installers" where one of the exported functions was called rather than
the chipset specific version.

This also fixes a UMS-mode bug -- the correct irq functions for IRL
and later chips were only getting loaded in the KMS path.
Signed-off-by: default avatarJesse Barnes <jbarnes@virtuousgeek.org>
Reviewed-by: default avatarBen Widawsky <ben@bwidawsk.net>
Signed-off-by: default avatarKeith Packard <keithp@keithp.com>
parent 79d24273
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Inline Side-by-side
Showing with 60 additions and 87 deletions
drivers/gpu/drm/i915/i915_dma.c
View file @ f71d4af4
...@@ -1266,30 +1266,6 @@ static int i915_load_modeset_init(struct drm_device *dev) ...@@ -1266,30 +1266,6 @@ static int i915_load_modeset_init(struct drm_device *dev)
intel_modeset_gem_init(dev); intel_modeset_gem_init(dev);
if (IS_IVYBRIDGE(dev)) {
/* Share pre & uninstall handlers with ILK/SNB */
dev->driver->irq_handler = ivybridge_irq_handler;
dev->driver->irq_preinstall = ironlake_irq_preinstall;
dev->driver->irq_postinstall = ivybridge_irq_postinstall;
dev->driver->irq_uninstall = ironlake_irq_uninstall;
dev->driver->enable_vblank = ivybridge_enable_vblank;
dev->driver->disable_vblank = ivybridge_disable_vblank;
} else if (HAS_PCH_SPLIT(dev)) {
dev->driver->irq_handler = ironlake_irq_handler;
dev->driver->irq_preinstall = ironlake_irq_preinstall;
dev->driver->irq_postinstall = ironlake_irq_postinstall;
dev->driver->irq_uninstall = ironlake_irq_uninstall;
dev->driver->enable_vblank = ironlake_enable_vblank;
dev->driver->disable_vblank = ironlake_disable_vblank;
} else {
dev->driver->irq_preinstall = i915_driver_irq_preinstall;
dev->driver->irq_postinstall = i915_driver_irq_postinstall;
dev->driver->irq_uninstall = i915_driver_irq_uninstall;
dev->driver->irq_handler = i915_driver_irq_handler;
dev->driver->enable_vblank = i915_enable_vblank;
dev->driver->disable_vblank = i915_disable_vblank;
}
ret = drm_irq_install(dev); ret = drm_irq_install(dev);
if (ret) if (ret)
goto cleanup_gem; goto cleanup_gem;
...@@ -2017,12 +1993,7 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags) ...@@ -2017,12 +1993,7 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags)
/* enable GEM by default */ /* enable GEM by default */
dev_priv->has_gem = 1; dev_priv->has_gem = 1;
dev->driver->get_vblank_counter = i915_get_vblank_counter; intel_irq_init(dev);
dev->max_vblank_count = 0xffffff; /* only 24 bits of frame count */
if (IS_G4X(dev) || IS_GEN5(dev) || IS_GEN6(dev) || IS_IVYBRIDGE(dev)) {
dev->max_vblank_count = 0xffffffff; /* full 32 bit counter */
dev->driver->get_vblank_counter = gm45_get_vblank_counter;
}
/* Try to make sure MCHBAR is enabled before poking at it */ /* Try to make sure MCHBAR is enabled before poking at it */
intel_setup_mchbar(dev); intel_setup_mchbar(dev);
......
drivers/gpu/drm/i915/i915_drv.c
View file @ f71d4af4
...@@ -765,14 +765,6 @@ static struct drm_driver driver = { ...@@ -765,14 +765,6 @@ static struct drm_driver driver = {
.resume = i915_resume, .resume = i915_resume,
.device_is_agp = i915_driver_device_is_agp, .device_is_agp = i915_driver_device_is_agp,
.enable_vblank = i915_enable_vblank,
.disable_vblank = i915_disable_vblank,
.get_vblank_timestamp = i915_get_vblank_timestamp,
.get_scanout_position = i915_get_crtc_scanoutpos,
.irq_preinstall = i915_driver_irq_preinstall,
.irq_postinstall = i915_driver_irq_postinstall,
.irq_uninstall = i915_driver_irq_uninstall,
.irq_handler = i915_driver_irq_handler,
.reclaim_buffers = drm_core_reclaim_buffers, .reclaim_buffers = drm_core_reclaim_buffers,
.master_create = i915_master_create, .master_create = i915_master_create,
.master_destroy = i915_master_destroy, .master_destroy = i915_master_destroy,
......
drivers/gpu/drm/i915/i915_drv.h
View file @ f71d4af4
...@@ -1031,33 +1031,12 @@ extern int i915_irq_emit(struct drm_device *dev, void *data, ...@@ -1031,33 +1031,12 @@ extern int i915_irq_emit(struct drm_device *dev, void *data,
extern int i915_irq_wait(struct drm_device *dev, void *data, extern int i915_irq_wait(struct drm_device *dev, void *data,
struct drm_file *file_priv); struct drm_file *file_priv);
extern irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS); extern void intel_irq_init(struct drm_device *dev);
extern void i915_driver_irq_preinstall(struct drm_device * dev);
extern int i915_driver_irq_postinstall(struct drm_device *dev);
extern void i915_driver_irq_uninstall(struct drm_device * dev);
extern irqreturn_t ironlake_irq_handler(DRM_IRQ_ARGS);
extern void ironlake_irq_preinstall(struct drm_device *dev);
extern int ironlake_irq_postinstall(struct drm_device *dev);
extern void ironlake_irq_uninstall(struct drm_device *dev);
extern irqreturn_t ivybridge_irq_handler(DRM_IRQ_ARGS);
extern void ivybridge_irq_preinstall(struct drm_device *dev);
extern int ivybridge_irq_postinstall(struct drm_device *dev);
extern void ivybridge_irq_uninstall(struct drm_device *dev);
extern int i915_vblank_pipe_set(struct drm_device *dev, void *data, extern int i915_vblank_pipe_set(struct drm_device *dev, void *data,
struct drm_file *file_priv); struct drm_file *file_priv);
extern int i915_vblank_pipe_get(struct drm_device *dev, void *data, extern int i915_vblank_pipe_get(struct drm_device *dev, void *data,
struct drm_file *file_priv); struct drm_file *file_priv);
extern int i915_enable_vblank(struct drm_device *dev, int crtc);
extern void i915_disable_vblank(struct drm_device *dev, int crtc);
extern int ironlake_enable_vblank(struct drm_device *dev, int crtc);
extern void ironlake_disable_vblank(struct drm_device *dev, int crtc);
extern int ivybridge_enable_vblank(struct drm_device *dev, int crtc);
extern void ivybridge_disable_vblank(struct drm_device *dev, int crtc);
extern u32 i915_get_vblank_counter(struct drm_device *dev, int crtc);
extern u32 gm45_get_vblank_counter(struct drm_device *dev, int crtc);
extern int i915_vblank_swap(struct drm_device *dev, void *data, extern int i915_vblank_swap(struct drm_device *dev, void *data,
struct drm_file *file_priv); struct drm_file *file_priv);
...@@ -1068,13 +1047,6 @@ void ...@@ -1068,13 +1047,6 @@ void
i915_disable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask); i915_disable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask);
void intel_enable_asle (struct drm_device *dev); void intel_enable_asle (struct drm_device *dev);
int i915_get_vblank_timestamp(struct drm_device *dev, int crtc,
int *max_error,
struct timeval *vblank_time,
unsigned flags);
int i915_get_crtc_scanoutpos(struct drm_device *dev, int pipe,
int *vpos, int *hpos);
#ifdef CONFIG_DEBUG_FS #ifdef CONFIG_DEBUG_FS
extern void i915_destroy_error_state(struct drm_device *dev); extern void i915_destroy_error_state(struct drm_device *dev);
......
drivers/gpu/drm/i915/i915_irq.c
View file @ f71d4af4
...@@ -152,7 +152,7 @@ i915_pipe_enabled(struct drm_device *dev, int pipe) ...@@ -152,7 +152,7 @@ i915_pipe_enabled(struct drm_device *dev, int pipe)
/* Called from drm generic code, passed a 'crtc', which /* Called from drm generic code, passed a 'crtc', which
* we use as a pipe index * we use as a pipe index
*/ */
u32 i915_get_vblank_counter(struct drm_device *dev, int pipe) static u32 i915_get_vblank_counter(struct drm_device *dev, int pipe)
{ {
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
unsigned long high_frame; unsigned long high_frame;
...@@ -184,7 +184,7 @@ u32 i915_get_vblank_counter(struct drm_device *dev, int pipe) ...@@ -184,7 +184,7 @@ u32 i915_get_vblank_counter(struct drm_device *dev, int pipe)
return (high1 << 8) | low; return (high1 << 8) | low;
} }
u32 gm45_get_vblank_counter(struct drm_device *dev, int pipe) static u32 gm45_get_vblank_counter(struct drm_device *dev, int pipe)
{ {
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
int reg = PIPE_FRMCOUNT_GM45(pipe); int reg = PIPE_FRMCOUNT_GM45(pipe);
...@@ -198,7 +198,7 @@ u32 gm45_get_vblank_counter(struct drm_device *dev, int pipe) ...@@ -198,7 +198,7 @@ u32 gm45_get_vblank_counter(struct drm_device *dev, int pipe)
return I915_READ(reg); return I915_READ(reg);
} }
int i915_get_crtc_scanoutpos(struct drm_device *dev, int pipe, static int i915_get_crtc_scanoutpos(struct drm_device *dev, int pipe,
int *vpos, int *hpos) int *vpos, int *hpos)
{ {
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
...@@ -264,7 +264,7 @@ int i915_get_crtc_scanoutpos(struct drm_device *dev, int pipe, ...@@ -264,7 +264,7 @@ int i915_get_crtc_scanoutpos(struct drm_device *dev, int pipe,
return ret; return ret;
} }
int i915_get_vblank_timestamp(struct drm_device *dev, int pipe, static int i915_get_vblank_timestamp(struct drm_device *dev, int pipe,
int *max_error, int *max_error,
struct timeval *vblank_time, struct timeval *vblank_time,
unsigned flags) unsigned flags)
...@@ -462,7 +462,7 @@ static void pch_irq_handler(struct drm_device *dev) ...@@ -462,7 +462,7 @@ static void pch_irq_handler(struct drm_device *dev)
DRM_DEBUG_DRIVER("PCH transcoder A underrun interrupt\n"); DRM_DEBUG_DRIVER("PCH transcoder A underrun interrupt\n");
} }
irqreturn_t ivybridge_irq_handler(DRM_IRQ_ARGS) static irqreturn_t ivybridge_irq_handler(DRM_IRQ_ARGS)
{ {
struct drm_device *dev = (struct drm_device *) arg; struct drm_device *dev = (struct drm_device *) arg;
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
...@@ -550,7 +550,7 @@ irqreturn_t ivybridge_irq_handler(DRM_IRQ_ARGS) ...@@ -550,7 +550,7 @@ irqreturn_t ivybridge_irq_handler(DRM_IRQ_ARGS)
return ret; return ret;
} }
irqreturn_t ironlake_irq_handler(DRM_IRQ_ARGS) static irqreturn_t ironlake_irq_handler(DRM_IRQ_ARGS)
{ {
struct drm_device *dev = (struct drm_device *) arg; struct drm_device *dev = (struct drm_device *) arg;
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
...@@ -1209,7 +1209,7 @@ static void i915_pageflip_stall_check(struct drm_device *dev, int pipe) ...@@ -1209,7 +1209,7 @@ static void i915_pageflip_stall_check(struct drm_device *dev, int pipe)
} }
} }
irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS) static irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS)
{ {
struct drm_device *dev = (struct drm_device *) arg; struct drm_device *dev = (struct drm_device *) arg;
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
...@@ -1454,7 +1454,7 @@ int i915_irq_wait(struct drm_device *dev, void *data, ...@@ -1454,7 +1454,7 @@ int i915_irq_wait(struct drm_device *dev, void *data,
/* Called from drm generic code, passed 'crtc' which /* Called from drm generic code, passed 'crtc' which
* we use as a pipe index * we use as a pipe index
*/ */
int i915_enable_vblank(struct drm_device *dev, int pipe) static int i915_enable_vblank(struct drm_device *dev, int pipe)
{ {
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
unsigned long irqflags; unsigned long irqflags;
...@@ -1478,7 +1478,7 @@ int i915_enable_vblank(struct drm_device *dev, int pipe) ...@@ -1478,7 +1478,7 @@ int i915_enable_vblank(struct drm_device *dev, int pipe)
return 0; return 0;
} }
int ironlake_enable_vblank(struct drm_device *dev, int pipe) static int ironlake_enable_vblank(struct drm_device *dev, int pipe)
{ {
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
unsigned long irqflags; unsigned long irqflags;
...@@ -1494,7 +1494,7 @@ int ironlake_enable_vblank(struct drm_device *dev, int pipe) ...@@ -1494,7 +1494,7 @@ int ironlake_enable_vblank(struct drm_device *dev, int pipe)
return 0; return 0;
} }
int ivybridge_enable_vblank(struct drm_device *dev, int pipe) static int ivybridge_enable_vblank(struct drm_device *dev, int pipe)
{ {
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
unsigned long irqflags; unsigned long irqflags;
...@@ -1513,7 +1513,7 @@ int ivybridge_enable_vblank(struct drm_device *dev, int pipe) ...@@ -1513,7 +1513,7 @@ int ivybridge_enable_vblank(struct drm_device *dev, int pipe)
/* Called from drm generic code, passed 'crtc' which /* Called from drm generic code, passed 'crtc' which
* we use as a pipe index * we use as a pipe index
*/ */
void i915_disable_vblank(struct drm_device *dev, int pipe) static void i915_disable_vblank(struct drm_device *dev, int pipe)
{ {
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
unsigned long irqflags; unsigned long irqflags;
...@@ -1529,7 +1529,7 @@ void i915_disable_vblank(struct drm_device *dev, int pipe) ...@@ -1529,7 +1529,7 @@ void i915_disable_vblank(struct drm_device *dev, int pipe)
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
} }
void ironlake_disable_vblank(struct drm_device *dev, int pipe) static void ironlake_disable_vblank(struct drm_device *dev, int pipe)
{ {
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
unsigned long irqflags; unsigned long irqflags;
...@@ -1540,7 +1540,7 @@ void ironlake_disable_vblank(struct drm_device *dev, int pipe) ...@@ -1540,7 +1540,7 @@ void ironlake_disable_vblank(struct drm_device *dev, int pipe)
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
} }
void ivybridge_disable_vblank(struct drm_device *dev, int pipe) static void ivybridge_disable_vblank(struct drm_device *dev, int pipe)
{ {
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
unsigned long irqflags; unsigned long irqflags;
...@@ -1728,7 +1728,7 @@ void i915_hangcheck_elapsed(unsigned long data) ...@@ -1728,7 +1728,7 @@ void i915_hangcheck_elapsed(unsigned long data)
/* drm_dma.h hooks /* drm_dma.h hooks
*/ */
void ironlake_irq_preinstall(struct drm_device *dev) static void ironlake_irq_preinstall(struct drm_device *dev)
{ {
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
...@@ -1769,7 +1769,7 @@ void ironlake_irq_preinstall(struct drm_device *dev) ...@@ -1769,7 +1769,7 @@ void ironlake_irq_preinstall(struct drm_device *dev)
POSTING_READ(SDEIER); POSTING_READ(SDEIER);
} }
int ironlake_irq_postinstall(struct drm_device *dev) static int ironlake_irq_postinstall(struct drm_device *dev)
{ {
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
/* enable kind of interrupts always enabled */ /* enable kind of interrupts always enabled */
...@@ -1841,7 +1841,7 @@ int ironlake_irq_postinstall(struct drm_device *dev) ...@@ -1841,7 +1841,7 @@ int ironlake_irq_postinstall(struct drm_device *dev)
return 0; return 0;
} }
int ivybridge_irq_postinstall(struct drm_device *dev) static int ivybridge_irq_postinstall(struct drm_device *dev)
{ {
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
/* enable kind of interrupts always enabled */ /* enable kind of interrupts always enabled */
...@@ -1891,7 +1891,7 @@ int ivybridge_irq_postinstall(struct drm_device *dev) ...@@ -1891,7 +1891,7 @@ int ivybridge_irq_postinstall(struct drm_device *dev)
return 0; return 0;
} }
void i915_driver_irq_preinstall(struct drm_device * dev) static void i915_driver_irq_preinstall(struct drm_device * dev)
{ {
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
int pipe; int pipe;
...@@ -1918,7 +1918,7 @@ void i915_driver_irq_preinstall(struct drm_device * dev) ...@@ -1918,7 +1918,7 @@ void i915_driver_irq_preinstall(struct drm_device * dev)
* Must be called after intel_modeset_init or hotplug interrupts won't be * Must be called after intel_modeset_init or hotplug interrupts won't be
* enabled correctly. * enabled correctly.
*/ */
int i915_driver_irq_postinstall(struct drm_device *dev) static int i915_driver_irq_postinstall(struct drm_device *dev)
{ {
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
u32 enable_mask = I915_INTERRUPT_ENABLE_FIX | I915_INTERRUPT_ENABLE_VAR; u32 enable_mask = I915_INTERRUPT_ENABLE_FIX | I915_INTERRUPT_ENABLE_VAR;
...@@ -1994,7 +1994,7 @@ int i915_driver_irq_postinstall(struct drm_device *dev) ...@@ -1994,7 +1994,7 @@ int i915_driver_irq_postinstall(struct drm_device *dev)
return 0; return 0;
} }
void ironlake_irq_uninstall(struct drm_device *dev) static void ironlake_irq_uninstall(struct drm_device *dev)
{ {
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
...@@ -2014,7 +2014,7 @@ void ironlake_irq_uninstall(struct drm_device *dev) ...@@ -2014,7 +2014,7 @@ void ironlake_irq_uninstall(struct drm_device *dev)
I915_WRITE(GTIIR, I915_READ(GTIIR)); I915_WRITE(GTIIR, I915_READ(GTIIR));
} }
void i915_driver_irq_uninstall(struct drm_device * dev) static void i915_driver_irq_uninstall(struct drm_device * dev)
{ {
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
int pipe; int pipe;
...@@ -2040,3 +2040,41 @@ void i915_driver_irq_uninstall(struct drm_device * dev) ...@@ -2040,3 +2040,41 @@ void i915_driver_irq_uninstall(struct drm_device * dev)
I915_READ(PIPESTAT(pipe)) & 0x8000ffff); I915_READ(PIPESTAT(pipe)) & 0x8000ffff);
I915_WRITE(IIR, I915_READ(IIR)); I915_WRITE(IIR, I915_READ(IIR));
} }
void intel_irq_init(struct drm_device *dev)
{
dev->driver->get_vblank_counter = i915_get_vblank_counter;
dev->max_vblank_count = 0xffffff; /* only 24 bits of frame count */
if (IS_G4X(dev) || IS_GEN5(dev) || IS_GEN6(dev) || IS_IVYBRIDGE(dev)) {
dev->max_vblank_count = 0xffffffff; /* full 32 bit counter */
dev->driver->get_vblank_counter = gm45_get_vblank_counter;
}
dev->driver->get_vblank_timestamp = i915_get_vblank_timestamp;
dev->driver->get_scanout_position = i915_get_crtc_scanoutpos;
if (IS_IVYBRIDGE(dev)) {
/* Share pre & uninstall handlers with ILK/SNB */
dev->driver->irq_handler = ivybridge_irq_handler;
dev->driver->irq_preinstall = ironlake_irq_preinstall;
dev->driver->irq_postinstall = ivybridge_irq_postinstall;
dev->driver->irq_uninstall = ironlake_irq_uninstall;
dev->driver->enable_vblank = ivybridge_enable_vblank;
dev->driver->disable_vblank = ivybridge_disable_vblank;
} else if (HAS_PCH_SPLIT(dev)) {
dev->driver->irq_handler = ironlake_irq_handler;
dev->driver->irq_preinstall = ironlake_irq_preinstall;
dev->driver->irq_postinstall = ironlake_irq_postinstall;
dev->driver->irq_uninstall = ironlake_irq_uninstall;
dev->driver->enable_vblank = ironlake_enable_vblank;
dev->driver->disable_vblank = ironlake_disable_vblank;
} else {
dev->driver->irq_preinstall = i915_driver_irq_preinstall;
dev->driver->irq_postinstall = i915_driver_irq_postinstall;
dev->driver->irq_uninstall = i915_driver_irq_uninstall;
dev->driver->irq_handler = i915_driver_irq_handler;
dev->driver->enable_vblank = i915_enable_vblank;
dev->driver->disable_vblank = i915_disable_vblank;
}
}
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