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| author | Guoniu Zhou <guoniu.zhou@nxp.com> | 2026-03-12 06:12:34 +0300 |
|---|---|---|
| committer | Hans Verkuil <hverkuil+cisco@kernel.org> | 2026-03-25 00:14:44 +0300 |
| commit | 2f38622d0f85f317be9e6b131da6cd511db94fd2 (patch) | |
| tree | f38bce05a6415e10ece61f33d55997278ec2d371 /include/linux/memory_hotplug.h | |
| parent | 21ad4e8584ae6538035976eebd569cfdf41d92df (diff) | |
| download | linux-2f38622d0f85f317be9e6b131da6cd511db94fd2.tar.xz | |
media: nxp: imx8-isi: Reduce minimum queued buffers from 2 to 0
Fix a hang issue when capturing a single frame with applications like cam
in libcamera. It would hang waiting for the driver to complete the buffer,
but streaming never starts because min_queued_buffers was set to 2.
The ISI module uses a ping-pong buffer mechanism that requires two buffers
to be programmed at all times. However, when fewer than 2 user buffers are
available, the driver use internal discard buffers to fill the remaining
slot(s). Reduce minimum queued buffers from 2 to 0 allows streaming to
start without any queued buffers.
Fixes: cf21f328fcaf ("media: nxp: Add i.MX8 ISI driver")
Cc: stable@vger.kernel.org
Signed-off-by: Guoniu Zhou <guoniu.zhou@nxp.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://patch.msgid.link/20260312-isi_min_buffers-v2-1-d5ea1c79ad81@nxp.com
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>
Diffstat (limited to 'include/linux/memory_hotplug.h')
0 files changed, 0 insertions, 0 deletions