[PATCH v3 0/2] media: nxp: imx8-isi: Fix single frame capture and optimize buffer usage

[Guoniu Zhou]

This series fixes a hang issue when capturing single frames and improves
buffer utilization by prioritizing user buffers over discard buffers.

Patch 1 reduces min_queued_buffers to allow streaming to start without any
queued buffers.

Patch 2 changes the buffer selection logic to use pending user buffers first,
minimizing unnecessary frame drops at stream start.

Signed-off-by: Guoniu Zhou <guoniu.zhou@xxxxxxx>
---
Changes in v3:
- Expanded commit message to explain the problem in current driver and the
  benefits gained from this change
- No code changes
- Add Rb tag from Laurent Pinchart
- Link to v2: https://lore.kernel.org/r/20260312-isi_min_buffers-v2-0-d5ea1c79ad81@xxxxxxx

Changes in v2:
- Add fix tag
- Replace "This ensures" with "ensure"
- Reduce min_queued_buffers from 2 to 0 suggested by Jacopo Mondi
- Put example from commit message to comment in driver suggested by Frank
- Detailed changes can be found in each patch's changelog
- Link to v1: https://lore.kernel.org/r/20260311-isi_min_buffers-v1-0-c9299d6e8ae6@xxxxxxx

---
Guoniu Zhou (2):
      media: nxp: imx8-isi: Reduce minimum queued buffers from 2 to 0
      media: nxp: imx8-isi: Prioritize pending buffers over discard buffers

 drivers/media/platform/nxp/imx8-isi/imx8-isi-video.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)
---
base-commit: 6de23f81a5e08be8fbf5e8d7e9febc72a5b5f27f
change-id: 20260310-isi_min_buffers-4b490a124223

Best regards,
-- 
Guoniu Zhou <guoniu.zhou@xxxxxxxxxxx>