Hi all,
This is an update of v4 that fixes a race condition that was introduced
in v2 of patch 1. That race only popped up now and could lead to a stuck
dewarper and system crashes in scenarios with high load and/or high
frame rates. See the changelog of patch 1 for further details. The rest
is unmodified:
This series contains a few updates to the dw100 dewarper. Patches 1-2
implement V4L2 requests support and dynamic updates of the vertex map.
This enables advanced use cases like interactive pan, zoom and rotate. A
first attempt to implement the dynamic update was posted a while back in
[1] but wasn't merged due to races in the implementation. By switching
to V4L2 requests the implementation is a lot simpler now.
Patch 3 fixes an issue on PREEMPT_RT enabled kernels.
Patch 4 does a bit of cleanup.
Best regards,
Stefan
[1] https://lore.kernel.org/linux-media/20241022063155.506191-1-umang.jain@ideasonboard.com/
Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
---
Changes in v5:
- Fixed a nasty race condition in patch 1 (see local changelog)
- Link to v4: https://lore.kernel.org/r/20260225-sklug-v6-16-topic-dw100-v3-1-dev-v4-0-53536d08de91@ideasonboard.com
Changes in v4:
- Applied some style fixes and comments from review (see individual changelogs)
- Collected tags
- Link to v3: https://lore.kernel.org/r/20260129-sklug-v6-16-topic-dw100-v3-1-dev-v3-0-2eb5685eaf09@ideasonboard.com
Changes in v3:
- Split the irq handler into two halves
- Added cleanup patch 4/4
- Link to v2: https://lore.kernel.org/r/20260122-sklug-v6-16-topic-dw100-v3-1-dev-v2-0-ea1e29f18cf1@ideasonboard.com
Changes in v2:
- Use v4l2_m2m_buf_done_and_job_finish() for correct signal order
- Use dev_warn_once() instead of manual tracking
- Dropped threaded interrupt handler
- Renamed user_map_needs_update to user_map_is_dirty
- Link to v1: https://lore.kernel.org/r/20260105-sklug-v6-16-topic-dw100-v3-1-dev-v1-0-65af34d04fd8@ideasonboard.com
---
Stefan Klug (4):
media: dw100: Implement V4L2 requests support
media: dw100: Implement dynamic vertex map update
media: dw100: Fix kernel oops with PREEMPT_RT enabled
media: dw100: Merge dw100_device_run and dw100_start
drivers/media/platform/nxp/dw100/dw100.c | 134 ++++++++++++++++++++-----------
1 file changed, 89 insertions(+), 45 deletions(-)
---
base-commit: 05f7e89ab9731565d8a62e3b5d1ec206485eeb0b
change-id: 20260105-sklug-v6-16-topic-dw100-v3-1-dev-b856657db695
Best regards,
--
Stefan Klug <stefan.klug@ideasonboard.com>