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

[Austin Hu <austin.hu@intel.com>]

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]