diff options
| -rw-r--r-- | linux-core/drmP.h | 1 | ||||
| -rw-r--r-- | linux-core/drm_irq.c | 62 |
2 files changed, 40 insertions, 23 deletions
diff --git a/linux-core/drmP.h b/linux-core/drmP.h index d7b1960c..00db3000 100644 --- a/linux-core/drmP.h +++ b/linux-core/drmP.h @@ -843,6 +843,7 @@ struct drm_device { int *vblank_enabled; /* so we don't call enable more than once per disable */ u32 *vblank_premodeset; /* for compensation of spurious wraparounds */ + int *vblank_suspend; /* Don't wait while crtc is likely disabled */ struct timer_list vblank_disable_timer; u32 max_vblank_count; /**< size of vblank counter register */ diff --git a/linux-core/drm_irq.c b/linux-core/drm_irq.c index 3627a890..abedbe73 100644 --- a/linux-core/drm_irq.c +++ b/linux-core/drm_irq.c @@ -112,6 +112,8 @@ static void drm_vblank_cleanup(struct drm_device *dev) DRM_MEM_DRIVER); drm_free(dev->vblank_premodeset, sizeof(*dev->vblank_premodeset) * dev->num_crtcs, DRM_MEM_DRIVER); + drm_free(dev->vblank_suspend, sizeof(*dev->vblank_suspend) * + dev->num_crtcs, DRM_MEM_DRIVER); dev->num_crtcs = 0; } @@ -160,6 +162,11 @@ int drm_vblank_init(struct drm_device *dev, int num_crtcs) if (!dev->vblank_premodeset) goto err; + dev->vblank_suspend = drm_calloc(num_crtcs, sizeof(int), + DRM_MEM_DRIVER); + if (!dev->vblank_suspend) + goto err; + /* Zero per-crtc vblank stuff */ for (i = 0; i < num_crtcs; i++) { init_waitqueue_head(&dev->vbl_queue[i]); @@ -343,6 +350,9 @@ void drm_update_vblank_count(struct drm_device *dev, int crtc) unsigned long irqflags; u32 cur_vblank, diff; + if (dev->vblank_suspend[crtc]) + return; + /* * Interrupts were disabled prior to this call, so deal with counter * wrap if needed. @@ -435,7 +445,6 @@ int drm_modeset_ctl(struct drm_device *dev, void *data, { struct drm_modeset_ctl *modeset = data; int crtc, ret = 0; - u32 new; crtc = modeset->crtc; if (crtc >= dev->num_crtcs) { @@ -447,21 +456,25 @@ int drm_modeset_ctl(struct drm_device *dev, void *data, case _DRM_PRE_MODESET: dev->vblank_premodeset[crtc] = dev->driver->get_vblank_counter(dev, crtc); + dev->vblank_suspend[crtc] = 1; break; case _DRM_POST_MODESET: - new = dev->driver->get_vblank_counter(dev, crtc); - - /* Compensate for spurious wraparound */ - if (new < dev->vblank_premodeset[crtc]) { - atomic_sub(dev->max_vblank_count + new - - dev->vblank_premodeset[crtc], - &dev->_vblank_count[crtc]); - DRM_DEBUG("vblank_premodeset[%d]=0x%x, new=0x%x " - "=> _vblank_count[%d]-=0x%x\n", crtc, - dev->vblank_premodeset[crtc], new, - crtc, dev->max_vblank_count + new - - dev->vblank_premodeset[crtc]); + if (dev->vblank_suspend[crtc]) { + u32 new = dev->driver->get_vblank_counter(dev, crtc); + + /* Compensate for spurious wraparound */ + if (new < dev->vblank_premodeset[crtc]) { + atomic_sub(dev->max_vblank_count + new - + dev->vblank_premodeset[crtc], + &dev->_vblank_count[crtc]); + DRM_DEBUG("vblank_premodeset[%d]=0x%x, new=0x%x" + " => _vblank_count[%d]-=0x%x\n", crtc, + dev->vblank_premodeset[crtc], new, + crtc, dev->max_vblank_count + new - + dev->vblank_premodeset[crtc]); + } } + dev->vblank_suspend[crtc] = 0; break; default: ret = -EINVAL; @@ -538,6 +551,9 @@ int drm_wait_vblank(struct drm_device *dev, void *data, struct list_head *vbl_sigs = &dev->vbl_sigs[crtc]; struct drm_vbl_sig *vbl_sig; + if (dev->vblank_suspend[crtc]) + return -EBUSY; + spin_lock_irqsave(&dev->vbl_lock, irqflags); /* Check if this task has already scheduled the same signal @@ -589,15 +605,15 @@ int drm_wait_vblank(struct drm_device *dev, void *data, vblwait->reply.sequence = seq; } else { - unsigned long cur_vblank; - - ret = drm_vblank_get(dev, crtc); - if (ret) - return ret; - DRM_WAIT_ON(ret, dev->vbl_queue[crtc], 3 * DRM_HZ, - (((cur_vblank = drm_vblank_count(dev, crtc)) - - vblwait->request.sequence) <= (1 << 23))); - drm_vblank_put(dev, crtc); + if (!dev->vblank_suspend[crtc]) { + ret = drm_vblank_get(dev, crtc); + if (ret) + return ret; + DRM_WAIT_ON(ret, dev->vbl_queue[crtc], 3 * DRM_HZ, + ((drm_vblank_count(dev, crtc) + - vblwait->request.sequence) <= (1 << 23))); + drm_vblank_put(dev, crtc); + } if (ret != -EINTR) { struct timeval now; @@ -606,7 +622,7 @@ int drm_wait_vblank(struct drm_device *dev, void *data, vblwait->reply.tval_sec = now.tv_sec; vblwait->reply.tval_usec = now.tv_usec; - vblwait->reply.sequence = cur_vblank; + vblwait->reply.sequence = drm_vblank_count(dev, crtc); } } |