Lines 649-651 had VramManager and info!() calls that don't belong
in handle_irq(). These were likely from a bad merge. The variables
fb_phys and fb_size are local to new() and don't exist in handle_irq().
Comprehensive 6-phase plan (1,055 lines) for updating the Intel GPU driver from current 1,590-line stub to full Gen9+ support ported from Linux 7.1 i915. Covers register abstraction, GMBUS I2C, DMC firmware, power wells, CDCLK, display pipeline, modesetting, and hardware validation.
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>