diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0748-media-bcm2835-unicam-change-minimum-number-of-vb2_qu.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.4/950-0748-media-bcm2835-unicam-change-minimum-number-of-vb2_qu.patch | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0748-media-bcm2835-unicam-change-minimum-number-of-vb2_qu.patch b/target/linux/bcm27xx/patches-5.4/950-0748-media-bcm2835-unicam-change-minimum-number-of-vb2_qu.patch new file mode 100644 index 0000000000..6f14ffc02c --- /dev/null +++ b/target/linux/bcm27xx/patches-5.4/950-0748-media-bcm2835-unicam-change-minimum-number-of-vb2_qu.patch @@ -0,0 +1,28 @@ +From f70be37d1bd6b68ed38022580b16c972598901e2 Mon Sep 17 00:00:00 2001 +From: David Plowman <david.plowman@raspberrypi.com> +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 <david.plowman@raspberrypi.com> +--- + 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 +@@ -2404,7 +2404,7 @@ 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); |