diff options
| -rw-r--r-- | drivers/media/platform/rcar-vin/rcar-dma.c | 16 | ||||
| -rw-r--r-- | drivers/media/platform/rcar-vin/rcar-vin.h | 2 |
2 files changed, 17 insertions, 1 deletions
diff --git a/drivers/media/platform/rcar-vin/rcar-dma.c b/drivers/media/platform/rcar-vin/rcar-dma.c index ac07f99e3516..cfe5d7a9d44e 100644 --- a/drivers/media/platform/rcar-vin/rcar-dma.c +++ b/drivers/media/platform/rcar-vin/rcar-dma.c @@ -856,7 +856,7 @@ static int rvin_capture_start(struct rvin_dev *vin) /* Continuous Frame Capture Mode */ rvin_write(vin, VNFC_C_FRAME, VNFC_REG); - vin->state = RUNNING; + vin->state = STARTING; return 0; } @@ -910,6 +910,20 @@ static irqreturn_t rvin_irq(int irq, void *data) vnms = rvin_read(vin, VNMS_REG); slot = (vnms & VNMS_FBS_MASK) >> VNMS_FBS_SHIFT; + /* + * To hand buffers back in a known order to userspace start + * to capture first from slot 0. + */ + if (vin->state == STARTING) { + if (slot != 0) { + vin_dbg(vin, "Starting sync slot: %d\n", slot); + goto done; + } + + vin_dbg(vin, "Capture start synced!\n"); + vin->state = RUNNING; + } + /* Capture frame */ if (vin->queue_buf[slot]) { vin->queue_buf[slot]->field = vin->format.field; diff --git a/drivers/media/platform/rcar-vin/rcar-vin.h b/drivers/media/platform/rcar-vin/rcar-vin.h index c2aef789b491..ff747e22d8cf 100644 --- a/drivers/media/platform/rcar-vin/rcar-vin.h +++ b/drivers/media/platform/rcar-vin/rcar-vin.h @@ -53,11 +53,13 @@ enum rvin_csi_id { /** * STOPPED - No operation in progress + * STARTING - Capture starting up * RUNNING - Operation in progress have buffers * STOPPING - Stopping operation */ enum rvin_dma_state { STOPPED = 0, + STARTING, RUNNING, STOPPING, }; |
