From: David Plowman Date: Thu, 28 May 2020 10:09:48 +0000 (+0100) Subject: media: bcm2835-unicam: change minimum number of vb2_queue buffers to 1 X-Git-Tag: accepted/tizen/unified/20240422.153132~738 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=f315a5ec5442c9382aa1ef784a8c60abc7b74a62;p=platform%2Fkernel%2Flinux-rpi.git 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 --- diff --git a/drivers/media/platform/bcm2835/bcm2835-unicam.c b/drivers/media/platform/bcm2835/bcm2835-unicam.c index 629a8c1..8325f1f 100644 --- 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_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_buffers_needed = 1; q->dev = &unicam->pdev->dev; ret = vb2_queue_init(q);