Worked on the torvalds/linux repository, focusing on improving firmware macro safety within the DRM/firmware code path. Addressed a subtle bug by refactoring FW_BLC_SELF_* macro definitions to use the REG_BIT() macro, enhancing type safety and preventing negative values from being assigned to unsigned integers. This change reduced the risk of firmware bugs and brought the code in line with established kernel coding standards. The update involved minimal changes to the codebase but provided a clear improvement in maintainability and future-proofing. Utilized C programming skills with an emphasis on hardware interfacing and kernel development throughout the refactor process.