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path: root/drivers/video/tegra/dc/dc.c
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Diffstat (limited to 'drivers/video/tegra/dc/dc.c')
-rw-r--r--drivers/video/tegra/dc/dc.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/video/tegra/dc/dc.c b/drivers/video/tegra/dc/dc.c
index db97ed3..de865e4 100644
--- a/drivers/video/tegra/dc/dc.c
+++ b/drivers/video/tegra/dc/dc.c
@@ -1045,6 +1045,10 @@ static void tegra_dc_continuous_irq(struct tegra_dc *dc, unsigned long status)
queue_work(system_freezable_wq, &dc->vblank_work);
if (status & FRAME_END_INT) {
+ struct timespec tm = CURRENT_TIME;
+ dc->frame_end_timestamp = timespec_to_ns(&tm);
+ wake_up(&dc->timestamp_wq);
+
/* Mark the frame_end as complete. */
if (!completion_done(&dc->frame_end_complete))
complete(&dc->frame_end_complete);
@@ -1052,6 +1056,20 @@ static void tegra_dc_continuous_irq(struct tegra_dc *dc, unsigned long status)
tegra_dc_trigger_windows(dc);
}
}
+
+/* XXX: Not sure if we limit look ahead to 1 frame */
+bool tegra_dc_is_within_n_vsync(struct tegra_dc *dc, s64 ts)
+{
+ return ((ts - dc->frame_end_timestamp) < dc->frametime_ns);
+}
+
+bool tegra_dc_does_vsync_separate(struct tegra_dc *dc, s64 new_ts, s64 old_ts)
+{
+ return (((new_ts - old_ts) > dc->frametime_ns)
+ || (div_s64((new_ts - dc->frame_end_timestamp), dc->frametime_ns)
+ != div_s64((old_ts - dc->frame_end_timestamp),
+ dc->frametime_ns)));
+}
#endif
static irqreturn_t tegra_dc_irq(int irq, void *ptr)
@@ -1759,6 +1777,7 @@ static int tegra_dc_probe(struct nvhost_device *ndev,
mutex_init(&dc->one_shot_lock);
init_completion(&dc->frame_end_complete);
init_waitqueue_head(&dc->wq);
+ init_waitqueue_head(&dc->timestamp_wq);
#ifdef CONFIG_ARCH_TEGRA_2x_SOC
INIT_WORK(&dc->reset_work, tegra_dc_reset_worker);
#endif