[PATCH v2 0/3] media: i2c: ov5693: Fix mode changes, flips and autosuspend

[Marco Ziliani <rylos78@gmail.com>]

Three fixes for the ov5693, found while getting the front camera of the
Microsoft Surface Pro 5 (IPU3) to work, and since tested on IPU6 and
IPU4P Surfaces as well.

Patch 1 programs the mode registers on every stream start instead of
on runtime PM resume, so that a format change also reaches a sensor
that stays powered between streams. This is the ov5693 counterpart of
commit 4e1446ac169a ("media: i2c: ov8865: Program the sensor on stream
start").

Patch 2 keeps the reported SBGGR10 order when a single flip is enabled
at full resolution: each flip moves the Bayer phase by one column, so
the output window is shifted by one column when hflip XOR vflip.

Patch 3 drops the usage count at stream stop with
pm_runtime_put_autosuspend(), so that the autosuspend delay counts from
stream stop rather than from the last resume.

Patch 1 has been public and in testing in the linux-surface tree since
2026-10-23 [2]. Simon Kruse's active state conversion [1] made the same
change as part of a larger rework; he has since dropped it from his
patch and will rebase the conversion on top of this series.

Patches 1 and 2 were developed in the linux-surface tree and tested
there on a Surface Pro 5 (IPU3), a Surface Pro 7 (IPU4P) and a Surface
Pro 7+ and Pro 9 (IPU6); patch 3 follows a report by Dario Manresa in
the same thread [2]. The three patches as posted here have also been
run on a Surface Pro 7 (IPU4P) and a Surface Pro 9 (IPU6) there.

[1] https://lore.kernel.org/linux-media/20261027074933.21921-1-simon0x+git@proton.me/
[2] https://github.com/linux-surface/kernel/pull/181

Signed-off-by: Marco Ziliani <rylos78@gmail.com>
---
Changes in v2:
- Patch 1: move ov5693_mode_configure() from ov5693_sensor_init() to
  ov5693_s_stream() rather than calling it in both, and shorten the
  commit message (Dan)
- Patch 1: Tested-by tags not carried over, since the code changed
- Patch 2: unchanged; whether to shift the window or to use
  V4L2_CTRL_FLAG_MODIFY_LAYOUT is still being discussed on v1, happy
  to switch if that is preferred (Dan)
- Patches 2 and 3: collected Reviewed-by and Tested-by tags
- Retested the series on the Surface Pro 5 (IPU3)
- Link to v1: https://patch.msgid.link/20261027-ov5693-fixes-v1-0-3c8ab1ae104d@gmail.com

---
Marco Ziliani (3):
      media: i2c: ov5693: Program the mode registers on stream start
      media: i2c: ov5693: Keep the Bayer order when flipping at full resolution
      media: i2c: ov5693: Use autosuspend when stopping the stream

 drivers/media/i2c/ov5693.c | 76 +++++++++++++++++++++++++++++++++++++---------
 1 file changed, 62 insertions(+), 14 deletions(-)
---
base-commit: d7e7bca7169873b46e857c025c10f3336c1258d8
change-id: 20261027-ov5693-fixes-8ec29752893a

Best regards,
--  
Marco Ziliani <rylos78@gmail.com>