Claude review: drm/tegra: Enable cmu for Tegra186 and Tegra194

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

Overall Series Review

Subject: drm/tegra: Enable cmu for Tegra186 and Tegra194
Author: Aaron Kling via B4 Relay <devnull+webgeek1234.gmail.com@kernel.org>
Patches: 2
Reviewed: 2026-04-12T14:39:02.640673

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This is a single-patch series (v3) that enables the Color Management Unit (CMU) on Tegra186/Tegra194 nvdisplay hardware, loading an sRGB LUT to correct dark color output. The motivation is sound -- without CMU, colors are noticeably darker than intended, and the vendor bootloader/downstream driver both enable this.

The implementation is straightforward: allocate a DMA-coherent buffer at probe time, populate it with an sRGB correction table, and program the CMU registers during HDMI and DisplayPort enable paths. v3 improvements (dmam_alloc_coherent, removal of improper IOVA null check) are welcome simplifications.

**Key issues:**
- Missing `Signed-off-by` for the `Co-developed-by` tag (process requirement).
- The HDMI and DP paths duplicate the LUT programming sequence -- could be a small helper.
- Minor style nits.

Overall this looks correct and ready with the tagging fix.

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