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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.c120
1 files changed, 89 insertions, 31 deletions
diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c
index 3a3d0ce891b9..19c01ca3cc76 100644
--- a/drivers/gpu/drm/drm_irq.c
+++ b/drivers/gpu/drm/drm_irq.c
@@ -106,6 +106,7 @@ static void vblank_disable_and_save(struct drm_device *dev, int crtc)
s64 diff_ns;
int vblrc;
struct timeval tvblank;
+ int count = DRM_TIMESTAMP_MAXRETRIES;
/* Prevent vblank irq processing while disabling vblank irqs,
* so no updates of timestamps or count can happen after we've
@@ -131,7 +132,10 @@ static void vblank_disable_and_save(struct drm_device *dev, int crtc)
do {
dev->last_vblank[crtc] = dev->driver->get_vblank_counter(dev, crtc);
vblrc = drm_get_last_vbltimestamp(dev, crtc, &tvblank, 0);
- } while (dev->last_vblank[crtc] != dev->driver->get_vblank_counter(dev, crtc));
+ } while (dev->last_vblank[crtc] != dev->driver->get_vblank_counter(dev, crtc) && (--count) && vblrc);
+
+ if (!count)
+ vblrc = 0;
/* Compute time difference to stored timestamp of last vblank
* as updated by last invocation of drm_handle_vblank() in vblank irq.
@@ -576,7 +580,8 @@ int drm_calc_vbltimestamp_from_scanoutpos(struct drm_device *dev, int crtc,
unsigned flags,
struct drm_crtc *refcrtc)
{
- struct timeval stime, raw_time;
+ ktime_t stime, etime, mono_time_offset;
+ struct timeval tv_etime;
struct drm_display_mode *mode;
int vbl_status, vtotal, vdisplay;
int vpos, hpos, i;
@@ -625,13 +630,15 @@ int drm_calc_vbltimestamp_from_scanoutpos(struct drm_device *dev, int crtc,
preempt_disable();
/* Get system timestamp before query. */
- do_gettimeofday(&stime);
+ stime = ktime_get();
/* Get vertical and horizontal scanout pos. vpos, hpos. */
vbl_status = dev->driver->get_scanout_position(dev, crtc, &vpos, &hpos);
/* Get system timestamp after query. */
- do_gettimeofday(&raw_time);
+ etime = ktime_get();
+ if (!drm_timestamp_monotonic)
+ mono_time_offset = ktime_get_monotonic_offset();
preempt_enable();
@@ -642,7 +649,7 @@ int drm_calc_vbltimestamp_from_scanoutpos(struct drm_device *dev, int crtc,
return -EIO;
}
- duration_ns = timeval_to_ns(&raw_time) - timeval_to_ns(&stime);
+ duration_ns = ktime_to_ns(etime) - ktime_to_ns(stime);
/* Accept result with < max_error nsecs timing uncertainty. */
if (duration_ns <= (s64) *max_error)
@@ -689,14 +696,20 @@ int drm_calc_vbltimestamp_from_scanoutpos(struct drm_device *dev, int crtc,
vbl_status |= 0x8;
}
+ if (!drm_timestamp_monotonic)
+ etime = ktime_sub(etime, mono_time_offset);
+
+ /* save this only for debugging purposes */
+ tv_etime = ktime_to_timeval(etime);
/* Subtract time delta from raw timestamp to get final
* vblank_time timestamp for end of vblank.
*/
- *vblank_time = ns_to_timeval(timeval_to_ns(&raw_time) - delta_ns);
+ etime = ktime_sub_ns(etime, delta_ns);
+ *vblank_time = ktime_to_timeval(etime);
DRM_DEBUG("crtc %d : v %d p(%d,%d)@ %ld.%ld -> %ld.%ld [e %d us, %d rep]\n",
crtc, (int)vbl_status, hpos, vpos,
- (long)raw_time.tv_sec, (long)raw_time.tv_usec,
+ (long)tv_etime.tv_sec, (long)tv_etime.tv_usec,
(long)vblank_time->tv_sec, (long)vblank_time->tv_usec,
(int)duration_ns/1000, i);
@@ -708,6 +721,17 @@ int drm_calc_vbltimestamp_from_scanoutpos(struct drm_device *dev, int crtc,
}
EXPORT_SYMBOL(drm_calc_vbltimestamp_from_scanoutpos);
+static struct timeval get_drm_timestamp(void)
+{
+ ktime_t now;
+
+ now = ktime_get();
+ if (!drm_timestamp_monotonic)
+ now = ktime_sub(now, ktime_get_monotonic_offset());
+
+ return ktime_to_timeval(now);
+}
+
/**
* drm_get_last_vbltimestamp - retrieve raw timestamp for the most recent
* vblank interval.
@@ -745,9 +769,9 @@ u32 drm_get_last_vbltimestamp(struct drm_device *dev, int crtc,
}
/* GPU high precision timestamp query unsupported or failed.
- * Return gettimeofday timestamp as best estimate.
+ * Return current monotonic/gettimeofday timestamp as best estimate.
*/
- do_gettimeofday(tvblank);
+ *tvblank = get_drm_timestamp();
return 0;
}
@@ -802,6 +826,47 @@ u32 drm_vblank_count_and_time(struct drm_device *dev, int crtc,
}
EXPORT_SYMBOL(drm_vblank_count_and_time);
+static void send_vblank_event(struct drm_device *dev,
+ struct drm_pending_vblank_event *e,
+ unsigned long seq, struct timeval *now)
+{
+ WARN_ON_SMP(!spin_is_locked(&dev->event_lock));
+ e->event.sequence = seq;
+ e->event.tv_sec = now->tv_sec;
+ e->event.tv_usec = now->tv_usec;
+
+ list_add_tail(&e->base.link,
+ &e->base.file_priv->event_list);
+ wake_up_interruptible(&e->base.file_priv->event_wait);
+ trace_drm_vblank_event_delivered(e->base.pid, e->pipe,
+ e->event.sequence);
+}
+
+/**
+ * drm_send_vblank_event - helper to send vblank event after pageflip
+ * @dev: DRM device
+ * @crtc: CRTC in question
+ * @e: the event to send
+ *
+ * Updates sequence # and timestamp on event, and sends it to userspace.
+ * Caller must hold event lock.
+ */
+void drm_send_vblank_event(struct drm_device *dev, int crtc,
+ struct drm_pending_vblank_event *e)
+{
+ struct timeval now;
+ unsigned int seq;
+ if (crtc >= 0) {
+ seq = drm_vblank_count_and_time(dev, crtc, &now);
+ } else {
+ seq = 0;
+
+ now = get_drm_timestamp();
+ }
+ send_vblank_event(dev, e, seq, &now);
+}
+EXPORT_SYMBOL(drm_send_vblank_event);
+
/**
* drm_update_vblank_count - update the master vblank counter
* @dev: DRM device
@@ -936,6 +1001,13 @@ void drm_vblank_put(struct drm_device *dev, int crtc)
}
EXPORT_SYMBOL(drm_vblank_put);
+/**
+ * drm_vblank_off - disable vblank events on a CRTC
+ * @dev: DRM device
+ * @crtc: CRTC in question
+ *
+ * Caller must hold event lock.
+ */
void drm_vblank_off(struct drm_device *dev, int crtc)
{
struct drm_pending_vblank_event *e, *t;
@@ -949,22 +1021,19 @@ void drm_vblank_off(struct drm_device *dev, int crtc)
/* Send any queued vblank events, lest the natives grow disquiet */
seq = drm_vblank_count_and_time(dev, crtc, &now);
+
+ spin_lock(&dev->event_lock);
list_for_each_entry_safe(e, t, &dev->vblank_event_list, base.link) {
if (e->pipe != crtc)
continue;
DRM_DEBUG("Sending premature vblank event on disable: \
wanted %d, current %d\n",
e->event.sequence, seq);
-
- e->event.sequence = seq;
- e->event.tv_sec = now.tv_sec;
- e->event.tv_usec = now.tv_usec;
+ list_del(&e->base.link);
drm_vblank_put(dev, e->pipe);
- list_move_tail(&e->base.link, &e->base.file_priv->event_list);
- wake_up_interruptible(&e->base.file_priv->event_wait);
- trace_drm_vblank_event_delivered(e->base.pid, e->pipe,
- e->event.sequence);
+ send_vblank_event(dev, e, seq, &now);
}
+ spin_unlock(&dev->event_lock);
spin_unlock_irqrestore(&dev->vbl_lock, irqflags);
}
@@ -1107,15 +1176,9 @@ static int drm_queue_vblank_event(struct drm_device *dev, int pipe,
e->event.sequence = vblwait->request.sequence;
if ((seq - vblwait->request.sequence) <= (1 << 23)) {
- e->event.sequence = seq;
- e->event.tv_sec = now.tv_sec;
- e->event.tv_usec = now.tv_usec;
drm_vblank_put(dev, pipe);
- list_add_tail(&e->base.link, &e->base.file_priv->event_list);
- wake_up_interruptible(&e->base.file_priv->event_wait);
+ send_vblank_event(dev, e, seq, &now);
vblwait->reply.sequence = seq;
- trace_drm_vblank_event_delivered(current->pid, pipe,
- vblwait->request.sequence);
} else {
/* drm_handle_vblank_events will call drm_vblank_put */
list_add_tail(&e->base.link, &dev->vblank_event_list);
@@ -1256,14 +1319,9 @@ static void drm_handle_vblank_events(struct drm_device *dev, int crtc)
DRM_DEBUG("vblank event on %d, current %d\n",
e->event.sequence, seq);
- e->event.sequence = seq;
- e->event.tv_sec = now.tv_sec;
- e->event.tv_usec = now.tv_usec;
+ list_del(&e->base.link);
drm_vblank_put(dev, e->pipe);
- list_move_tail(&e->base.link, &e->base.file_priv->event_list);
- wake_up_interruptible(&e->base.file_priv->event_wait);
- trace_drm_vblank_event_delivered(e->base.pid, e->pipe,
- e->event.sequence);
+ send_vblank_event(dev, e, seq, &now);
}
spin_unlock_irqrestore(&dev->event_lock, flags);
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