From 44fc199145966a06d1ee06abbfb46b2a590f1b4c Mon Sep 17 00:00:00 2001 From: David Plowman Date: Thu, 28 May 2020 11:09:48 +0100 Subject: [PATCH] media: bcm2835-unicam: change minimum number of vb2_queue buffers to 1 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 --- drivers/media/platform/bcm2835/bcm2835-unicam.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/media/platform/bcm2835/bcm2835-unicam.c +++ b/drivers/media/platform/bcm2835/bcm2835-unicam.c @@ -2430,7 +2430,7 @@ static int register_node(struct unicam_d 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_buffers_needed = 1; q->dev = &unicam->pdev->dev; ret = vb2_queue_init(q);