Claude review: DSC max delta bpp support

[Claude Code Review Bot <claude-review@example.com>]

Overall Series Review

Subject: DSC max delta bpp support
Author: Nemesa Garg <nemesa.garg@intel.com>
Patches: 5
Reviewed: 2026-04-23T10:06:54.839347

---

This 2-patch series adds support for decoding DSC maximum bpp from the delta-based DPCD fields (register 0x06E) defined in eDP 1.5 / DP 2.0. The goal is reasonable — some sinks only expose max bpp via the delta encoding rather than the absolute DPCD 0x067/0x068 fields.

However, the series has a **correctness bug** (reserved 444 delta values produce garbage output), **naming convention violations** in the shared DRM header, and questionable placement of driver-specific decode constants in the common `drm_dp.h`. The series needs a respin.

**Key issues:**
- Reserved delta values (22–31) for RGB/YCbCr444 are silently passed through without decoding, producing wrong max bpp values.
- New macro names in `drm_dp.h` break the `DP_DSC_` naming convention used throughout the file.
- Driver-specific decode constants don't belong in the shared DPCD header.

---

---
Generated by Claude Code Patch Reviewer