Claude review: drm/i915/color: Add YCbCr limited-to-full range color block support

Claude Code Review Bot
2026-04-12T03:07:25Z

Patch Review

**Overall**: Adds `INTEL_PLANE_CB_YUV_RANGE_CORRECT` as a single-option fixed matrix colorop (`BIT(DRM_COLOROP_FM_YCBCR_LIMITED_FULL)`).

**Observation**: Having a colorop with only one selectable option (plus bypass) is a valid pattern — the real control is the bypass toggle. This cleanly models the hardware's YUV range correction block.

No issues with this patch in isolation, but the programming side (patch 12) has the critical interaction bug described above.