/* drm_dma.h hooks */ void i915_driver_irq_preinstall(drm_device_t * dev) { drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; I915_WRITE16(I915REG_HWSTAM, 0xfffe); I915_WRITE16(I915REG_INT_MASK_R, 0x0); I915_WRITE16(I915REG_INT_ENABLE_R, 0x0); }
void i915_driver_irq_uninstall(drm_device_t * dev) { drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; u16 temp; if (!dev_priv) return; I915_WRITE16(I915REG_HWSTAM, 0xffff); I915_WRITE16(I915REG_INT_MASK_R, 0xffff); I915_WRITE16(I915REG_INT_ENABLE_R, 0x0); temp = I915_READ16(I915REG_INT_IDENTITY_R); I915_WRITE16(I915REG_INT_IDENTITY_R, temp); }
irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS) { drm_device_t *dev = (drm_device_t *) arg; drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; u16 temp; temp = I915_READ16(I915REG_INT_IDENTITY_R); temp &= (USER_INT_FLAG | VSYNC_PIPEA_FLAG | VSYNC_PIPEB_FLAG); DRM_DEBUG("%s flag=%08x\n", __FUNCTION__, temp); if (temp == 0) return IRQ_NONE; I915_WRITE16(I915REG_INT_IDENTITY_R, temp); dev_priv->sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv); if (temp & USER_INT_FLAG) DRM_WAKEUP(&dev_priv->irq_queue); if (temp & (VSYNC_PIPEA_FLAG | VSYNC_PIPEB_FLAG)) { atomic_inc(&dev->vbl_received); DRM_WAKEUP(&dev->vbl_queue); drm_vbl_send_signals(dev); } return IRQ_HANDLED; }
static int i915_enable_interrupt (drm_device_t *dev) { drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; u16 flag; flag = 0; if (dev_priv->vblank_pipe & DRM_I915_VBLANK_PIPE_A) flag |= VSYNC_PIPEA_FLAG; if (dev_priv->vblank_pipe & DRM_I915_VBLANK_PIPE_B) flag |= VSYNC_PIPEB_FLAG; if (dev_priv->vblank_pipe & ~(DRM_I915_VBLANK_PIPE_A|DRM_I915_VBLANK_PIPE_B)) { DRM_ERROR("%s called with invalid pipe 0x%x\n", __FUNCTION__, dev_priv->vblank_pipe); return DRM_ERR(EINVAL); } I915_WRITE16(I915REG_INT_ENABLE_R, USER_INT_FLAG | flag); return 0; }