Claude review: drm/i915/color: Add support for 1D LUT in SDR planes

Claude Code Review Bot
2026-04-12T03:07:23Z

Patch Review

**Overall**: Extends the SDR pipeline with pre/post-CSC LUT blocks using a smaller LUT size (32 vs 128 for HDR).

**Observation**: The `is_hdr` check now selects the LUT size at init time:
```c
is_hdr ? PLANE_DEGAMMA_SIZE : PLANE_DEGAMMA_SIZE_SDR
```
This is correct. Note that the post-CSC LUT size (`PLANE_GAMMA_SIZE = 32`) is the same for both HDR and SDR, but the pre-CSC differs (128 vs 32).

No issues.