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-rw-r--r--bsd-core/drmP.h7
-rw-r--r--bsd-core/drm_irq.c93
2 files changed, 65 insertions, 35 deletions
diff --git a/bsd-core/drmP.h b/bsd-core/drmP.h
index d3f53b86..88ea4e69 100644
--- a/bsd-core/drmP.h
+++ b/bsd-core/drmP.h
@@ -794,13 +794,12 @@ struct drm_device {
atomic_t *vblank_refcount; /* number of users of vblank interrupts per crtc */
u32 *last_vblank; /* protected by dev->vbl_lock, used */
/* for wraparound handling */
-
- u32 *vblank_offset; /* used to track how many vblanks */
int *vblank_enabled; /* so we don't call enable more than */
/* once per disable */
- u32 *vblank_premodeset; /* were lost during modeset */
+ u32 *vblank_premodeset; /* for compensation of spurious wraparounds */
+ int *vblank_suspend; /* Don't wait while crtc is likely disabled */
struct callout vblank_disable_timer;
- unsigned long max_vblank_count; /* size of vblank counter register */
+ u32 max_vblank_count; /* size of vblank counter register */
int num_crtcs;
#ifdef __FreeBSD__
diff --git a/bsd-core/drm_irq.c b/bsd-core/drm_irq.c
index 132d01bb..c3ecd28b 100644
--- a/bsd-core/drm_irq.c
+++ b/bsd-core/drm_irq.c
@@ -120,15 +120,15 @@ 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_offset, sizeof(*dev->vblank_offset) * 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;
}
int drm_vblank_init(struct drm_device *dev, int num_crtcs)
{
- int i, ret = -ENOMEM;
+ int i, ret = ENOMEM;
callout_init_mtx(&dev->vblank_disable_timer, &dev->vbl_lock, 0);
atomic_set(&dev->vbl_signal_pending, 0);
@@ -168,8 +168,9 @@ int drm_vblank_init(struct drm_device *dev, int num_crtcs)
if (!dev->vblank_premodeset)
goto err;
- dev->vblank_offset = drm_calloc(num_crtcs, sizeof(u32), DRM_MEM_DRIVER);
- if (!dev->vblank_offset)
+ dev->vblank_suspend = drm_calloc(num_crtcs, sizeof(int),
+ DRM_MEM_DRIVER);
+ if (!dev->vblank_suspend)
goto err;
/* Zero per-crtc vblank stuff */
@@ -328,8 +329,7 @@ int drm_control(struct drm_device *dev, void *data, struct drm_file *file_priv)
u32 drm_vblank_count(struct drm_device *dev, int crtc)
{
- return atomic_read(&dev->_vblank_count[crtc]) +
- dev->vblank_offset[crtc];
+ return atomic_read(&dev->_vblank_count[crtc]);
}
void drm_update_vblank_count(struct drm_device *dev, int crtc)
@@ -337,6 +337,9 @@ 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.
@@ -347,9 +350,16 @@ void drm_update_vblank_count(struct drm_device *dev, int crtc)
cur_vblank = dev->driver.get_vblank_counter(dev, crtc);
DRM_SPINLOCK_IRQSAVE(&dev->vbl_lock, irqflags);
if (cur_vblank < dev->last_vblank[crtc]) {
- diff = dev->max_vblank_count -
- dev->last_vblank[crtc];
- diff += cur_vblank;
+ if (cur_vblank == dev->last_vblank[crtc] - 1) {
+ diff = 0;
+ } else {
+ diff = dev->max_vblank_count -
+ dev->last_vblank[crtc];
+ diff += cur_vblank;
+ }
+
+ DRM_DEBUG("last_vblank[%d]=0x%x, cur_vblank=0x%x => diff=0x%x\n",
+ crtc, dev->last_vblank[crtc], cur_vblank, diff);
} else {
diff = cur_vblank - dev->last_vblank[crtc];
}
@@ -398,11 +408,10 @@ 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) {
- ret = -EINVAL;
+ ret = EINVAL;
goto out;
}
@@ -410,13 +419,28 @@ 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);
- dev->vblank_offset[crtc] = dev->vblank_premodeset[crtc] - new;
+ 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;
+ ret = EINVAL;
break;
}
@@ -427,7 +451,6 @@ out:
int drm_wait_vblank(struct drm_device *dev, void *data, struct drm_file *file_priv)
{
drm_wait_vblank_t *vblwait = data;
- struct timeval now;
int ret = 0;
int flags, seq, crtc;
@@ -473,6 +496,9 @@ int drm_wait_vblank(struct drm_device *dev, void *data, struct drm_file *file_pr
if (vbl_sig == NULL)
return ENOMEM;
+ if (dev->vblank_suspend[crtc])
+ return EBUSY;
+
vbl_sig->sequence = vblwait->request.sequence;
vbl_sig->signo = vblwait->request.signal;
vbl_sig->pid = DRM_CURRENTPID;
@@ -486,23 +512,28 @@ int drm_wait_vblank(struct drm_device *dev, void *data, struct drm_file *file_pr
#endif
ret = EINVAL;
} else {
- unsigned long cur_vblank;
-
- DRM_LOCK();
- /* shared code returns -errno */
-
- 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))
+ if (!dev->vblank_suspend[crtc]) {
+ DRM_LOCK();
+ /* shared code returns -errno */
+
+ 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);
- DRM_UNLOCK();
+ drm_vblank_put(dev, crtc);
+ DRM_UNLOCK();
+ }
- microtime(&now);
- vblwait->reply.tval_sec = now.tv_sec;
- vblwait->reply.tval_usec = now.tv_usec;
+ if (ret != EINTR) {
+ struct timeval now;
+
+ microtime(&now);
+ vblwait->reply.tval_sec = now.tv_sec;
+ vblwait->reply.tval_usec = now.tv_usec;
+ vblwait->reply.sequence = drm_vblank_count(dev, crtc);
+ }
}
return ret;
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-25 18:11:12 +0000