@@ -14,6 +14,7 @@
#include <linux/interrupt.h>
#include <linux/pm_runtime.h>
+#include <media/v4l2-event.h>
#include <media/videobuf2-dma-contig.h>
#include "rcar-vin.h"
@@ -115,10 +116,14 @@
#define VNFC_S_FRAME (1 << 0)
/* Video n Interrupt Enable Register bits */
+#define VNIE_VFE BIT(17)
+#define VNIE_VRE BIT(16)
#define VNIE_FIE BIT(4)
#define VNIE_EFE BIT(1)
/* Video n Interrupt Status Register bits */
+#define VNINTS_VFS BIT(17)
+#define VNINTS_VRS BIT(16)
#define VNINTS_FIS BIT(4)
#define VNINTS_EFS BIT(1)
@@ -898,6 +903,8 @@ static int rvin_setup(struct rvin_dev *vin)
/* Progressive or interlaced mode */
interrupts = progressive ? VNIE_FIE : VNIE_EFE;
+ /* Enable VSYNC Rising Edge Detection. */
+ interrupts |= VNIE_VRE;
/* Ack interrupts */
rvin_write(vin, interrupts, VNINTS_REG);
@@ -1049,6 +1056,16 @@ static irqreturn_t rvin_irq(int irq, void *data)
rvin_write(vin, status, VNINTS_REG);
handled = 1;
+ /* Signal Start of Frame. */
+ if (status & VNINTS_VRS) {
+ struct v4l2_event event = {
+ .type = V4L2_EVENT_FRAME_SYNC,
+ .u.frame_sync.frame_sequence = vin->sequence,
+ };
+
+ v4l2_event_queue(&vin->vdev, &event);
+ }
+
/* Nothing to do if nothing was captured. */
capture = vin->format.field == V4L2_FIELD_NONE ||
vin->format.field == V4L2_FIELD_ALTERNATE ?
@@ -734,6 +734,8 @@ static int rvin_subscribe_event(struct v4l2_fh *fh,
const struct v4l2_event_subscription *sub)
{
switch (sub->type) {
+ case V4L2_EVENT_FRAME_SYNC:
+ return v4l2_event_subscribe(fh, sub, 2, NULL);
case V4L2_EVENT_SOURCE_CHANGE:
return v4l2_event_subscribe(fh, sub, 4, NULL);
}
Enable the VSYNC Rising Edge Detection interrupt and generate a FRAME_SYNC event form it. The interrupt is available on all supported models of the VIN (Gen2, Gen3 and Gen4). Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se> --- .../media/platform/renesas/rcar-vin/rcar-dma.c | 17 +++++++++++++++++ .../media/platform/renesas/rcar-vin/rcar-v4l2.c | 2 ++ 2 files changed, 19 insertions(+)