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Subject: media: test-drivers: vivid: Increase max supported buffers for capture
queues
Author: Benjamin Gaignard <benjamin.gaign...@collabora.com>
Date: Thu Nov 9 17:35:01 2023 +0100
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.gaign...@collabora.com>
Reviewed-by: Andrzej Pietrasiewicz <andrze...@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-ci...@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mche...@kernel.org>
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;
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