diff options
Diffstat (limited to 'drivers/char/drm/mga_irq.c')
| -rw-r--r-- | drivers/char/drm/mga_irq.c | 69 |
1 files changed, 18 insertions, 51 deletions
diff --git a/drivers/char/drm/mga_irq.c b/drivers/char/drm/mga_irq.c index 06852fb4b27..9302cb8f0f8 100644 --- a/drivers/char/drm/mga_irq.c +++ b/drivers/char/drm/mga_irq.c @@ -35,20 +35,6 @@ #include "mga_drm.h" #include "mga_drv.h" -u32 mga_get_vblank_counter(struct drm_device *dev, int crtc) -{ - const drm_mga_private_t *const dev_priv = - (drm_mga_private_t *) dev->dev_private; - - if (crtc != 0) { - return 0; - } - - - return atomic_read(&dev_priv->vbl_received); -} - - irqreturn_t mga_driver_irq_handler(DRM_IRQ_ARGS) { struct drm_device *dev = (struct drm_device *) arg; @@ -61,8 +47,9 @@ irqreturn_t mga_driver_irq_handler(DRM_IRQ_ARGS) /* VBLANK interrupt */ if (status & MGA_VLINEPEN) { MGA_WRITE(MGA_ICLEAR, MGA_VLINEICLR); - atomic_inc(&dev_priv->vbl_received); - drm_handle_vblank(dev, 0); + atomic_inc(&dev->vbl_received); + DRM_WAKEUP(&dev->vbl_queue); + drm_vbl_send_signals(dev); handled = 1; } @@ -91,34 +78,22 @@ irqreturn_t mga_driver_irq_handler(DRM_IRQ_ARGS) return IRQ_NONE; } -int mga_enable_vblank(struct drm_device *dev, int crtc) +int mga_driver_vblank_wait(struct drm_device * dev, unsigned int *sequence) { - drm_mga_private_t *dev_priv = (drm_mga_private_t *) dev->dev_private; - - if (crtc != 0) { - DRM_ERROR("tried to enable vblank on non-existent crtc %d\n", - crtc); - return 0; - } - - MGA_WRITE(MGA_IEN, MGA_VLINEIEN | MGA_SOFTRAPEN); - return 0; -} + unsigned int cur_vblank; + int ret = 0; + /* Assume that the user has missed the current sequence number + * by about a day rather than she wants to wait for years + * using vertical blanks... + */ + DRM_WAIT_ON(ret, dev->vbl_queue, 3 * DRM_HZ, + (((cur_vblank = atomic_read(&dev->vbl_received)) + - *sequence) <= (1 << 23))); -void mga_disable_vblank(struct drm_device *dev, int crtc) -{ - if (crtc != 0) { - DRM_ERROR("tried to disable vblank on non-existent crtc %d\n", - crtc); - } + *sequence = cur_vblank; - /* Do *NOT* disable the vertical refresh interrupt. MGA doesn't have - * a nice hardware counter that tracks the number of refreshes when - * the interrupt is disabled, and the kernel doesn't know the refresh - * rate to calculate an estimate. - */ - /* MGA_WRITE(MGA_IEN, MGA_VLINEIEN | MGA_SOFTRAPEN); */ + return ret; } int mga_driver_fence_wait(struct drm_device * dev, unsigned int *sequence) @@ -150,22 +125,14 @@ void mga_driver_irq_preinstall(struct drm_device * dev) MGA_WRITE(MGA_ICLEAR, ~0); } -int mga_driver_irq_postinstall(struct drm_device * dev) +void mga_driver_irq_postinstall(struct drm_device * dev) { drm_mga_private_t *dev_priv = (drm_mga_private_t *) dev->dev_private; - int ret; - - ret = drm_vblank_init(dev, 1); - if (ret) - return ret; DRM_INIT_WAITQUEUE(&dev_priv->fence_queue); - /* Turn on soft trap interrupt. Vertical blank interrupts are enabled - * in mga_enable_vblank. - */ - MGA_WRITE(MGA_IEN, MGA_SOFTRAPEN); - return 0; + /* Turn on vertical blank interrupt and soft trap interrupt. */ + MGA_WRITE(MGA_IEN, MGA_VLINEIEN | MGA_SOFTRAPEN); } void mga_driver_irq_uninstall(struct drm_device * dev) |