[PATCH v15 45/56] media: test-drivers: vivid: Increase max supported buffers for capture queues

[Benjamin Gaignard]

Change the maximum number of buffers of some capture queues in order
to test max_num_buffers field.

Allow to allocate up to:
- 64 buffers for video capture queue.
- 1024 buffers for sdr capture queue.
- 32768 buffers for vbi capture queue.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@xxxxxxxxxxxxx>
Reviewed-by: Andrzej Pietrasiewicz <andrzej.p@xxxxxxxxxxxxx>
---
 drivers/media/test-drivers/vivid/vivid-core.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/media/test-drivers/vivid/vivid-core.c b/drivers/media/test-drivers/vivid/vivid-core.c
index 394c9f81ea72..353f035fcd19 100644
--- a/drivers/media/test-drivers/vivid/vivid-core.c
+++ b/drivers/media/test-drivers/vivid/vivid-core.c
@@ -876,6 +876,20 @@ static int vivid_create_queue(struct vivid_dev *dev,
 	q->type = buf_type;
 	q->io_modes = VB2_MMAP | VB2_DMABUF;
 	q->io_modes |= V4L2_TYPE_IS_OUTPUT(buf_type) ?  VB2_WRITE : VB2_READ;
+
+	/*
+	 * The maximum number of buffers is 32768 if PAGE_SHIFT == 12,
+	 * see also MAX_BUFFER_INDEX in videobuf2-core.c. It will be less if
+	 * PAGE_SHIFT > 12, but then max_num_buffers will be clamped by
+	 * videobuf2-core.c to MAX_BUFFER_INDEX.
+	 */
+	if (buf_type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
+		q->max_num_buffers = 64;
+	if (buf_type == V4L2_BUF_TYPE_SDR_CAPTURE)
+		q->max_num_buffers = 1024;
+	if (buf_type == V4L2_BUF_TYPE_VBI_CAPTURE)
+		q->max_num_buffers = 32768;
+
 	if (allocators[dev->inst] != 1)
 		q->io_modes |= VB2_USERPTR;
 	q->drv_priv = dev;
-- 
2.39.2