#include "drmP.h"
#include <linux/interrupt.h> /* For task queue support */
+#include <linux/slab.h>
+#include <linux/vgaarb.h>
/**
* Get interrupt from bus id.
*
dev->num_crtcs = 0;
}
+EXPORT_SYMBOL(drm_vblank_cleanup);
int drm_vblank_init(struct drm_device *dev, int num_crtcs)
{
}
dev->vblank_disable_allowed = 0;
-
return 0;
err:
}
EXPORT_SYMBOL(drm_vblank_init);
+static void drm_irq_vgaarb_nokms(void *cookie, bool state)
+{
+ struct drm_device *dev = cookie;
+
+ if (dev->driver->vgaarb_irq) {
+ dev->driver->vgaarb_irq(dev, state);
+ return;
+ }
+
+ if (!dev->irq_enabled)
+ return;
+
+ if (state)
+ dev->driver->irq_uninstall(dev);
+ else {
+ dev->driver->irq_preinstall(dev);
+ dev->driver->irq_postinstall(dev);
+ }
+}
+
/**
* Install IRQ handler.
*
return ret;
}
+ if (!drm_core_check_feature(dev, DRIVER_MODESET))
+ vga_client_register(dev->pdev, (void *)dev, drm_irq_vgaarb_nokms, NULL);
+
/* After installing handler */
ret = dev->driver->irq_postinstall(dev);
if (ret < 0) {
DRM_DEBUG("irq=%d\n", dev->pdev->irq);
+ if (!drm_core_check_feature(dev, DRIVER_MODESET))
+ vga_client_register(dev->pdev, NULL, NULL, NULL);
+
dev->driver->irq_uninstall(dev);
free_irq(dev->pdev->irq, dev);
spin_lock_irqsave(&dev->vbl_lock, irqflags);
/* Going from 0->1 means we have to enable interrupts again */
- if (atomic_add_return(1, &dev->vblank_refcount[crtc]) == 1 &&
- !dev->vblank_enabled[crtc]) {
- ret = dev->driver->enable_vblank(dev, crtc);
- DRM_DEBUG("enabling vblank on crtc %d, ret: %d\n", crtc, ret);
- if (ret)
+ if (atomic_add_return(1, &dev->vblank_refcount[crtc]) == 1) {
+ if (!dev->vblank_enabled[crtc]) {
+ ret = dev->driver->enable_vblank(dev, crtc);
+ DRM_DEBUG("enabling vblank on crtc %d, ret: %d\n", crtc, ret);
+ if (ret)
+ atomic_dec(&dev->vblank_refcount[crtc]);
+ else {
+ dev->vblank_enabled[crtc] = 1;
+ drm_update_vblank_count(dev, crtc);
+ }
+ }
+ } else {
+ if (!dev->vblank_enabled[crtc]) {
atomic_dec(&dev->vblank_refcount[crtc]);
- else {
- dev->vblank_enabled[crtc] = 1;
- drm_update_vblank_count(dev, crtc);
+ ret = -EINVAL;
}
}
spin_unlock_irqrestore(&dev->vbl_lock, irqflags);
}
EXPORT_SYMBOL(drm_vblank_put);
+void drm_vblank_off(struct drm_device *dev, int crtc)
+{
+ unsigned long irqflags;
+
+ spin_lock_irqsave(&dev->vbl_lock, irqflags);
+ dev->driver->disable_vblank(dev, crtc);
+ DRM_WAKEUP(&dev->vbl_queue[crtc]);
+ dev->vblank_enabled[crtc] = 0;
+ dev->last_vblank[crtc] = dev->driver->get_vblank_counter(dev, crtc);
+ spin_unlock_irqrestore(&dev->vbl_lock, irqflags);
+}
+EXPORT_SYMBOL(drm_vblank_off);
+
/**
* drm_vblank_pre_modeset - account for vblanks across mode sets
* @dev: DRM device
*/
void drm_vblank_pre_modeset(struct drm_device *dev, int crtc)
{
+ /* vblank is not initialized (IRQ not installed ?) */
+ if (!dev->num_crtcs)
+ return;
/*
* To avoid all the problems that might happen if interrupts
* were enabled/disabled around or between these calls, we just
return ret;
}
+static int drm_queue_vblank_event(struct drm_device *dev, int pipe,
+ union drm_wait_vblank *vblwait,
+ struct drm_file *file_priv)
+{
+ struct drm_pending_vblank_event *e;
+ struct timeval now;
+ unsigned long flags;
+ unsigned int seq;
+
+ e = kzalloc(sizeof *e, GFP_KERNEL);
+ if (e == NULL)
+ return -ENOMEM;
+
+ e->pipe = pipe;
+ e->event.base.type = DRM_EVENT_VBLANK;
+ e->event.base.length = sizeof e->event;
+ e->event.user_data = vblwait->request.signal;
+ e->base.event = &e->event.base;
+ e->base.file_priv = file_priv;
+ e->base.destroy = (void (*) (struct drm_pending_event *)) kfree;
+
+ do_gettimeofday(&now);
+ spin_lock_irqsave(&dev->event_lock, flags);
+
+ if (file_priv->event_space < sizeof e->event) {
+ spin_unlock_irqrestore(&dev->event_lock, flags);
+ kfree(e);
+ return -ENOMEM;
+ }
+
+ file_priv->event_space -= sizeof e->event;
+ seq = drm_vblank_count(dev, pipe);
+ if ((vblwait->request.type & _DRM_VBLANK_NEXTONMISS) &&
+ (seq - vblwait->request.sequence) <= (1 << 23)) {
+ vblwait->request.sequence = seq + 1;
+ vblwait->reply.sequence = vblwait->request.sequence;
+ }
+
+ DRM_DEBUG("event on vblank count %d, current %d, crtc %d\n",
+ vblwait->request.sequence, seq, pipe);
+
+ e->event.sequence = vblwait->request.sequence;
+ if ((seq - vblwait->request.sequence) <= (1 << 23)) {
+ e->event.tv_sec = now.tv_sec;
+ e->event.tv_usec = now.tv_usec;
+ drm_vblank_put(dev, e->pipe);
+ list_add_tail(&e->base.link, &e->base.file_priv->event_list);
+ wake_up_interruptible(&e->base.file_priv->event_wait);
+ } else {
+ list_add_tail(&e->base.link, &dev->vblank_event_list);
+ }
+
+ spin_unlock_irqrestore(&dev->event_lock, flags);
+
+ return 0;
+}
+
/**
* Wait for VBLANK.
*
ret = drm_vblank_get(dev, crtc);
if (ret) {
- DRM_ERROR("failed to acquire vblank counter, %d\n", ret);
+ DRM_DEBUG("failed to acquire vblank counter, %d\n", ret);
return ret;
}
seq = drm_vblank_count(dev, crtc);
goto done;
}
+ if (flags & _DRM_VBLANK_EVENT)
+ return drm_queue_vblank_event(dev, crtc, vblwait, file_priv);
+
if ((flags & _DRM_VBLANK_NEXTONMISS) &&
(seq - vblwait->request.sequence) <= (1<<23)) {
vblwait->request.sequence = seq + 1;
return ret;
}
+void drm_handle_vblank_events(struct drm_device *dev, int crtc)
+{
+ struct drm_pending_vblank_event *e, *t;
+ struct timeval now;
+ unsigned long flags;
+ unsigned int seq;
+
+ do_gettimeofday(&now);
+ seq = drm_vblank_count(dev, crtc);
+
+ spin_lock_irqsave(&dev->event_lock, flags);
+
+ list_for_each_entry_safe(e, t, &dev->vblank_event_list, base.link) {
+ if (e->pipe != crtc)
+ continue;
+ if ((seq - e->event.sequence) > (1<<23))
+ continue;
+
+ DRM_DEBUG("vblank event on %d, current %d\n",
+ e->event.sequence, seq);
+
+ e->event.sequence = seq;
+ e->event.tv_sec = now.tv_sec;
+ e->event.tv_usec = now.tv_usec;
+ drm_vblank_put(dev, e->pipe);
+ list_move_tail(&e->base.link, &e->base.file_priv->event_list);
+ wake_up_interruptible(&e->base.file_priv->event_wait);
+ }
+
+ spin_unlock_irqrestore(&dev->event_lock, flags);
+}
+
/**
* drm_handle_vblank - handle a vblank event
* @dev: DRM device
*/
void drm_handle_vblank(struct drm_device *dev, int crtc)
{
+ if (!dev->num_crtcs)
+ return;
+
atomic_inc(&dev->_vblank_count[crtc]);
DRM_WAKEUP(&dev->vbl_queue[crtc]);
+ drm_handle_vblank_events(dev, crtc);
}
EXPORT_SYMBOL(drm_handle_vblank);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff