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media: bcm2835-unicam: change minimum number of vb2_queue buffers to 1

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Since the unicam driver was modified to write to a dummy buffer when no
user-supplied buffer is available, it can now write to and return a
buffer even when there's only a single one. Enable this by changing the
min_buffers_needed in the vb2_queue; it will be useful for enabling
still captures without allocating more memory than absolutely necessary.

Signed-off-by: David Plowman <david.plowman@raspberrypi.com>
This commit is contained in:
David Plowman
2020-05-28 11:09:48 +01:00
committed by Dom Cobley
parent 62426f6d71
commit 06e923e88b
1 changed files with 1 additions and 1 deletions
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2
drivers/media/platform/bcm2835/bcm2835-unicam.c
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@@ -2420,7 +2420,7 @@ static int register_node(struct unicam_device *unicam, struct unicam_node *node,
q->buf_struct_size = sizeof(struct unicam_buffer);
q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
q->lock = &node->lock;
q->min_buffers_needed = 2;
q->min_queued_buffers = 1;
q->dev = &unicam->pdev->dev;
ret = vb2_queue_init(q);