fix: sensor image flip and mirror orientation

[henkwiedig]

Fixes image.flip and image.mirror config options on star6e (Infinity6E) and maruko (SSC338Q/Infinity6C) platforms. Previously, orientation either had no effect or reverted to the default within ~1 second of stream start.
This is 100% vibe coded, i have no idea what i am doing here.

Root cause

Two separate bugs:

1. VPE digital flip (MI_VPE_SetChannelParam with flip=1) caused a delayed/broken stream start on the IMX415 and possibly other sensors. It has been disabled; MI_SNR_SetOrien (sensor-level) is the only path now.

2. ISP AE first-tick resets sensor timing registers at ~1s after stream start, and on the IMX415 this incidentally clears the sensor's orientation bits. The reset is triggered asynchronously by MI_ISP_CUS3A_Enable({0,0,0}) in the CUS3A handoff, so a single re-apply immediately after the handoff does not stick.

Fix

Multi-layer re-apply targeting every point where sensor registers can be clobbered:

• Before MI_SNR_Enable in sensor_select.c — correct ordering matching the reference majestic streamer (SetRes→SetFps→SetOrien→Enable)
• After VPE init in start_vpe / maruko_start_vpe
• After ISP channel init (wait_isp_channel) and after ISP bin load in bind_and_finalize_pipeline
• After the CUS3A handoff in cus3a_tick
• After any MI_SNR_SetFps call (legacy_ae branch, live ISP bin reload, CUS3A fps_kick cold-boot fix) — SetFps resets sensor timing registers as a side effect
• Frame loop (star6e_runtime.c, maruko_pipeline.c): re-apply at frames 1, fps, 2×fps…5×fps — catches the async AE first-tick reset regardless of when it fires

Changes

File	Change
include/sensor_select.h	Add image_mirror/image_flip to SensorSelectConfig
include/star6e_cus3a.h	Add mirror/flip to Star6eCus3aConfig
include/maruko_config.h	Add image_mirror/image_flip to MarukoBackendConfig
src/sensor_select.c	Call MI_SNR_SetOrien before MI_SNR_Enable
src/star6e_pipeline.c	Disable VPE digital flip; store orientation in globals; re-apply at all ISP init milestones
src/star6e_cus3a.c	Load MI_SNR_SetOrien via dlsym; re-apply after fps_kick
src/star6e_runtime.c	Propagate mirror/flip to CUS3A config; frame-loop re-apply
src/maruko_config.c	Copy mirror/flip from vcfg
src/maruko_pipeline.c	Full parity with star6e: SetOrien in start_vpe, after fps kicks, frame-loop

Tested on star6e with IMX415. Maruko changes follow the same pattern; no maruko hardware available for direct test.

[snokvist]

Hello,

You need to test the code on maruko as well if your fixes include it. Otherwise exclude maruko and document as follow-up.
IMX335 has a bug/feature afaik which doesnt allow flip to be done, been meaning to soft disable flip there, but also needs tests/confirmation before merge.

[snokvist]

PR #84 will merge this functionality, check it out!