[PATCH 0/2] drm/i915/fbc: Dirty rectangle bounds enforcement and CFB nuke handling

This series improves Frame Buffer Compression (FBC) dirty rectangle
handling in compliance with hardware requirements.

The first patch restricts dirty rectangle vertical coordinates to the
valid frame buffer range [y_offset, y_end], adding explicit coordinate
inversion handling for 180-degree plane rotation and debug logging when
clamping occurs[cite: 10].

The second patch tracks plane state attribute changes during atomic commits[cite: 9].
When FBC Dirty Rectangle mode is active, partial updates only apply to
surface address changes (PLANE_SURF)[cite: 9]. Modifications to any other
plane state parameters require fetching full-plane pixel data from memory to
re-compress and update the entire CFB in stolen memory[cite: 9]. Once fully
re-compressed, subsequent atomic commits can resume selective dirty
rectangle updates[cite: 9].

Austin Hu (1):
  drm/i915/fbc: nuke CFB if Plane setting (except for surf addr) changes[cite: 9]

Charlton Lin (1):
  drm/i915/fbc: fbc_dirty_rect restrictions and logging[cite: 10]

 drivers/gpu/drm/i915/display/intel_fbc.c | 158 +++++++++++++++++++++-[cite: 9, 10]
 1 file changed, 151 insertions(+), 7 deletions(-)[cite: 9, 10]