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path: root/drivers/gpu/drm/drm_irq.c
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Diffstat (limited to 'drivers/gpu/drm/drm_irq.c')
-rw-r--r--drivers/gpu/drm/drm_irq.c73
1 files changed, 54 insertions, 19 deletions
diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c
index 1e787f894b3c..724e505873cf 100644
--- a/drivers/gpu/drm/drm_irq.c
+++ b/drivers/gpu/drm/drm_irq.c
@@ -116,6 +116,9 @@ void drm_vblank_cleanup(struct drm_device *dev)
dev->num_crtcs, DRM_MEM_DRIVER);
drm_free(dev->last_vblank, sizeof(*dev->last_vblank) * dev->num_crtcs,
DRM_MEM_DRIVER);
+ drm_free(dev->last_vblank_wait,
+ sizeof(*dev->last_vblank_wait) * dev->num_crtcs,
+ DRM_MEM_DRIVER);
drm_free(dev->vblank_inmodeset, sizeof(*dev->vblank_inmodeset) *
dev->num_crtcs, DRM_MEM_DRIVER);
@@ -161,6 +164,11 @@ int drm_vblank_init(struct drm_device *dev, int num_crtcs)
if (!dev->last_vblank)
goto err;
+ dev->last_vblank_wait = drm_calloc(num_crtcs, sizeof(u32),
+ DRM_MEM_DRIVER);
+ if (!dev->last_vblank_wait)
+ goto err;
+
dev->vblank_inmodeset = drm_calloc(num_crtcs, sizeof(int),
DRM_MEM_DRIVER);
if (!dev->vblank_inmodeset)
@@ -305,6 +313,8 @@ int drm_control(struct drm_device *dev, void *data,
case DRM_INST_HANDLER:
if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ))
return 0;
+ if (drm_core_check_feature(dev, DRIVER_MODESET))
+ return 0;
if (dev->if_version < DRM_IF_VERSION(1, 2) &&
ctl->irq != dev->pdev->irq)
return -EINVAL;
@@ -312,6 +322,8 @@ int drm_control(struct drm_device *dev, void *data,
case DRM_UNINST_HANDLER:
if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ))
return 0;
+ if (drm_core_check_feature(dev, DRIVER_MODESET))
+ return 0;
return drm_irq_uninstall(dev);
default:
return -EINVAL;
@@ -427,6 +439,45 @@ void drm_vblank_put(struct drm_device *dev, int crtc)
EXPORT_SYMBOL(drm_vblank_put);
/**
+ * drm_vblank_pre_modeset - account for vblanks across mode sets
+ * @dev: DRM device
+ * @crtc: CRTC in question
+ * @post: post or pre mode set?
+ *
+ * Account for vblank events across mode setting events, which will likely
+ * reset the hardware frame counter.
+ */
+void drm_vblank_pre_modeset(struct drm_device *dev, int crtc)
+{
+ /*
+ * To avoid all the problems that might happen if interrupts
+ * were enabled/disabled around or between these calls, we just
+ * have the kernel take a reference on the CRTC (just once though
+ * to avoid corrupting the count if multiple, mismatch calls occur),
+ * so that interrupts remain enabled in the interim.
+ */
+ if (!dev->vblank_inmodeset[crtc]) {
+ dev->vblank_inmodeset[crtc] = 1;
+ drm_vblank_get(dev, crtc);
+ }
+}
+EXPORT_SYMBOL(drm_vblank_pre_modeset);
+
+void drm_vblank_post_modeset(struct drm_device *dev, int crtc)
+{
+ unsigned long irqflags;
+
+ if (dev->vblank_inmodeset[crtc]) {
+ spin_lock_irqsave(&dev->vbl_lock, irqflags);
+ dev->vblank_disable_allowed = 1;
+ dev->vblank_inmodeset[crtc] = 0;
+ spin_unlock_irqrestore(&dev->vbl_lock, irqflags);
+ drm_vblank_put(dev, crtc);
+ }
+}
+EXPORT_SYMBOL(drm_vblank_post_modeset);
+
+/**
* drm_modeset_ctl - handle vblank event counter changes across mode switch
* @DRM_IOCTL_ARGS: standard ioctl arguments
*
@@ -441,7 +492,6 @@ int drm_modeset_ctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_modeset_ctl *modeset = data;
- unsigned long irqflags;
int crtc, ret = 0;
/* If drm_vblank_init() hasn't been called yet, just no-op */
@@ -454,28 +504,12 @@ int drm_modeset_ctl(struct drm_device *dev, void *data,
goto out;
}
- /*
- * To avoid all the problems that might happen if interrupts
- * were enabled/disabled around or between these calls, we just
- * have the kernel take a reference on the CRTC (just once though
- * to avoid corrupting the count if multiple, mismatch calls occur),
- * so that interrupts remain enabled in the interim.
- */
switch (modeset->cmd) {
case _DRM_PRE_MODESET:
- if (!dev->vblank_inmodeset[crtc]) {
- dev->vblank_inmodeset[crtc] = 1;
- drm_vblank_get(dev, crtc);
- }
+ drm_vblank_pre_modeset(dev, crtc);
break;
case _DRM_POST_MODESET:
- if (dev->vblank_inmodeset[crtc]) {
- spin_lock_irqsave(&dev->vbl_lock, irqflags);
- dev->vblank_disable_allowed = 1;
- dev->vblank_inmodeset[crtc] = 0;
- spin_unlock_irqrestore(&dev->vbl_lock, irqflags);
- drm_vblank_put(dev, crtc);
- }
+ drm_vblank_post_modeset(dev, crtc);
break;
default:
ret = -EINVAL;
@@ -616,6 +650,7 @@ int drm_wait_vblank(struct drm_device *dev, void *data,
} else {
DRM_DEBUG("waiting on vblank count %d, crtc %d\n",
vblwait->request.sequence, crtc);
+ dev->last_vblank_wait[crtc] = vblwait->request.sequence;
DRM_WAIT_ON(ret, dev->vbl_queue[crtc], 3 * DRM_HZ,
((drm_vblank_count(dev, crtc)
- vblwait->request.sequence) <= (1 << 23)));