[PATCH] media: rcar-vin: Use user proved buffers when starting

[PATCH] media: rcar-vin: Use user proved buffers when starting

[Niklas Söderlund]

When adding an internal scratch buffer to improve buffer handling when
stopping it was also erroneously used when syncing at capture start.
This lead to that the first three buffers captured where always dropped
as they where captured in the scratch buffer instead of in a buffer
provided by the user.

Allow the hardware to be given user provided buffers when preparing for
captured in the stopped state. This still allows the driver to sync with
the hardware and always completes the buffers to user-space in the
correct order as no buffers is completed before the sync is complete.
This changes improves the driver as buffers are completed and given to
the user three frames earlier then before.

The change also fixes a warning produced by v4l2-compliance,

    warn: v4l2-test-buffers.cpp(448): got sequence number 3, expected 0

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
---
 drivers/media/platform/rcar-vin/rcar-dma.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/media/platform/rcar-vin/rcar-dma.c b/drivers/media/platform/rcar-vin/rcar-dma.c
index 58718e52ae541a87..e5162bf42bd0e3ab 100644
--- a/drivers/media/platform/rcar-vin/rcar-dma.c
+++ b/drivers/media/platform/rcar-vin/rcar-dma.c
@@ -906,7 +906,8 @@ static void rvin_fill_hw_slot(struct rvin_dev *vin, int slot)
 				vin->format.sizeimage / 2;
 			break;
 		}
-	} else if (vin->state != RUNNING || list_empty(&vin->buf_list)) {
+	} else if ((vin->state != STOPPED && vin->state != RUNNING) ||
+		   list_empty(&vin->buf_list)) {
 		vin->buf_hw[slot].buffer = NULL;
 		vin->buf_hw[slot].type = FULL;
 		phys_addr = vin->scratch_phys;
-- 
2.33.0