Re: [PATCH RFC 2/2] media: i2c: ov5693: fix horizontal flip polarity and Bayer phase

[Fernando Rimoli]

Tested this ov5693 patch on a Surface Pro 9 (Alder Lake IPU6, ov5693 front
camera).

I reproduced your 4-state flip/image matrix on the SP9 via raw V4L2 (capturing
SBGGR10 straight from the ISYS node, so libcamera's rotation handling is out of
the path and I could drive HFLIP/VFLIP directly). Unpatched, the matrix matched
yours: the correct image is at HFLIP=0/VFLIP=1, and the state libcamera
actually uses to undo the 180-degree mount (HFLIP=1+VFLIP=1) comes out
horizontally mirrored.

With this patch applied, the correct, un-mirrored image moves to
HFLIP=1+VFLIP=1 (what libcamera requests now yields the right
orientation). That confirms the inverted-HFLIP / correct-VFLIP conclusion on a
second IPU6 platform.

I did not separately validate the Bayer-phase column offset (my simple debayer
couldn't isolate it), so this Tested-by is for the HFLIP polarity behaviour.

Tested-by: Fernando Rimoli <fernandorimoli11@xxxxxxxxx>