[PATCH v8 29/53] media: pci: tw686x: Set min_buffers_needed to 3

Benjamin Gaignard
2023-09-27T15:38:41Z

vb2 queue_setup checks for a minimum number of buffers so set
min_buffers_needed to 3 and remove the useless check in
tw686x_queue_setup().

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
---
drivers/media/pci/tw686x/tw686x-video.c | 13 +++++--------
1 file changed, 5 insertions(+), 8 deletions(-)

diff --git a/drivers/media/pci/tw686x/tw686x-video.c b/drivers/media/pci/tw686x/tw686x-video.c
index 3ebf7a2c95f0..74cd864365aa 100644
--- a/drivers/media/pci/tw686x/tw686x-video.c
+++ b/drivers/media/pci/tw686x/tw686x-video.c
@@ -426,13 +426,6 @@ static int tw686x_queue_setup(struct vb2_queue *vq,
unsigned int szimage =
(vc->width * vc->height * vc->format->depth) >> 3;

- /*
- * Let's request at least three buffers: two for the
- * DMA engine and one for userspace.
- */
- if (vq->num_buffers + *nbuffers < 3)
- *nbuffers = 3 - vq->num_buffers;
-
if (*nplanes) {
if (*nplanes != 1 || sizes[0] < szimage)
return -EINVAL;
@@ -1221,7 +1214,11 @@ int tw686x_video_init(struct tw686x_dev *dev)
vc->vidq.ops = &tw686x_video_qops;
vc->vidq.mem_ops = dev->dma_ops->mem_ops;
vc->vidq.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
- vc->vidq.min_buffers_needed = 2;
+ /*
+ * Let's request at least three buffers: two for the
+ * DMA engine and one for userspace.
+ */
+ vc->vidq.min_buffers_needed = 3;
vc->vidq.lock = &vc->vb_mutex;
vc->vidq.gfp_flags = dev->dma_mode != TW686X_DMA_MODE_MEMCPY ?
GFP_DMA32 : 0;