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Commit 5d8e6bb7 authored by Eric Anholt's avatar Eric Anholt Committed by Dave Airlie
Browse files

drm: Remove infrastructure for supporting i915's vblank swapping. 



It's not used in any other drivers, and doesn't look like it will be from
drm.git master.

Signed-off-by: default avatarEric Anholt <eric@anholt.net>
Signed-off-by: default avatarDave Airlie <airlied@linux.ie>
parent bd95e0a4

drivers/gpu/drm/drm_irq.c

+0 −80
Original line number Diff line number Diff line
@@ -280,8 +280,6 @@ int drm_irq_uninstall(struct drm_device * dev) 


	drm_vblank_cleanup(dev);



	dev->locked_tasklet_func = NULL;



	return 0;

}

EXPORT_SYMBOL(drm_irq_uninstall);
@@ -699,81 +697,3 @@ void drm_handle_vblank(struct drm_device *dev, int crtc) 
	drm_vbl_send_signals(dev, crtc);

}

EXPORT_SYMBOL(drm_handle_vblank);
 


/**

 * Tasklet wrapper function.

 *

 * \param data DRM device in disguise.

 *

 * Attempts to grab the HW lock and calls the driver callback on success. On

 * failure, leave the lock marked as contended so the callback can be called

 * from drm_unlock().

 */

static void drm_locked_tasklet_func(unsigned long data)

{

	struct drm_device *dev = (struct drm_device *)data;

	unsigned long irqflags;

	void (*tasklet_func)(struct drm_device *);

	

	spin_lock_irqsave(&dev->tasklet_lock, irqflags);

	tasklet_func = dev->locked_tasklet_func;

	spin_unlock_irqrestore(&dev->tasklet_lock, irqflags);



	if (!tasklet_func ||

	    !drm_lock_take(&dev->lock,

			   DRM_KERNEL_CONTEXT)) {

		return;

	}



	dev->lock.lock_time = jiffies;

	atomic_inc(&dev->counts[_DRM_STAT_LOCKS]);



	spin_lock_irqsave(&dev->tasklet_lock, irqflags);

	tasklet_func = dev->locked_tasklet_func;

	dev->locked_tasklet_func = NULL;

	spin_unlock_irqrestore(&dev->tasklet_lock, irqflags);

	

	if (tasklet_func != NULL)

		tasklet_func(dev);



	drm_lock_free(&dev->lock,

		      DRM_KERNEL_CONTEXT);

}



/**

 * Schedule a tasklet to call back a driver hook with the HW lock held.

 *

 * \param dev DRM device.

 * \param func Driver callback.

 *

 * This is intended for triggering actions that require the HW lock from an

 * interrupt handler. The lock will be grabbed ASAP after the interrupt handler

 * completes. Note that the callback may be called from interrupt or process

 * context, it must not make any assumptions about this. Also, the HW lock will

 * be held with the kernel context or any client context.

 */

void drm_locked_tasklet(struct drm_device *dev, void (*func)(struct drm_device *))

{

	unsigned long irqflags;

	static DECLARE_TASKLET(drm_tasklet, drm_locked_tasklet_func, 0);



	if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ) ||

	    test_bit(TASKLET_STATE_SCHED, &drm_tasklet.state))

		return;



	spin_lock_irqsave(&dev->tasklet_lock, irqflags);



	if (dev->locked_tasklet_func) {

		spin_unlock_irqrestore(&dev->tasklet_lock, irqflags);

		return;

	}



	dev->locked_tasklet_func = func;



	spin_unlock_irqrestore(&dev->tasklet_lock, irqflags);



	drm_tasklet.data = (unsigned long)dev;



	tasklet_hi_schedule(&drm_tasklet);

}

EXPORT_SYMBOL(drm_locked_tasklet);

drivers/gpu/drm/drm_lock.c

+0 −9
Original line number Diff line number Diff line
@@ -154,8 +154,6 @@ int drm_lock(struct drm_device *dev, void *data, struct drm_file *file_priv) 
int drm_unlock(struct drm_device *dev, void *data, struct drm_file *file_priv)

{

	struct drm_lock *lock = data;

	unsigned long irqflags;

	void (*tasklet_func)(struct drm_device *);



	if (lock->context == DRM_KERNEL_CONTEXT) {

		DRM_ERROR("Process %d using kernel context %d\n",
@@ -163,13 +161,6 @@ int drm_unlock(struct drm_device *dev, void *data, struct drm_file *file_priv) 
		return -EINVAL;

	}



	spin_lock_irqsave(&dev->tasklet_lock, irqflags);

	tasklet_func = dev->locked_tasklet_func;

	dev->locked_tasklet_func = NULL;

	spin_unlock_irqrestore(&dev->tasklet_lock, irqflags);

	if (tasklet_func != NULL)

		tasklet_func(dev);



	atomic_inc(&dev->counts[_DRM_STAT_UNLOCKS]);



	/* kernel_context_switch isn't used by any of the x86 drm

drivers/gpu/drm/drm_stub.c

+0 −1
Original line number Diff line number Diff line
@@ -92,7 +92,6 @@ static int drm_fill_in_dev(struct drm_device * dev, struct pci_dev *pdev, 


	spin_lock_init(&dev->count_lock);

	spin_lock_init(&dev->drw_lock);

	spin_lock_init(&dev->tasklet_lock);

	spin_lock_init(&dev->lock.spinlock);

	init_timer(&dev->timer);

	mutex_init(&dev->struct_mutex);

include/drm/drmP.h

+0 −5
Original line number Diff line number Diff line
@@ -861,8 +861,6 @@ struct drm_device { 
	struct timer_list vblank_disable_timer;



	u32 max_vblank_count;           /**< size of vblank counter register */

	spinlock_t tasklet_lock;	/**< For drm_locked_tasklet */

	void (*locked_tasklet_func)(struct drm_device *dev);



	/*@} */

	cycles_t ctx_start;
@@ -1149,8 +1147,6 @@ extern int drm_vblank_init(struct drm_device *dev, int num_crtcs); 
extern int drm_wait_vblank(struct drm_device *dev, void *data,

			   struct drm_file *filp);

extern int drm_vblank_wait(struct drm_device *dev, unsigned int *vbl_seq);

extern void drm_locked_tasklet(struct drm_device *dev,

			       void(*func)(struct drm_device *));

extern u32 drm_vblank_count(struct drm_device *dev, int crtc);

extern void drm_handle_vblank(struct drm_device *dev, int crtc);

extern int drm_vblank_get(struct drm_device *dev, int crtc);
@@ -1158,7 +1154,6 @@ extern void drm_vblank_put(struct drm_device *dev, int crtc); 
/* Modesetting support */

extern int drm_modeset_ctl(struct drm_device *dev, void *data,

			   struct drm_file *file_priv);

extern void drm_locked_tasklet(struct drm_device *dev, void(*func)(struct drm_device*));



				/* AGP/GART support (drm_agpsupport.h) */

extern struct drm_agp_head *drm_agp_init(struct drm_device *dev);