These patches introduce I915_FORMAT_MOD_4_TILED_XE2_CCS modifier, which, from the kernel's perspective, behaves similarly to `I915_FORMAT_MOD_4_TILED`. This new modifier is primarily intended for user space to effectively monitor compression status, especially when dealing with a mix of compressed and uncompressed buffers. The addition of this modifier facilitates user space in managing compression status, particularly when utilizing both compressed and uncompressed buffers concurrently. To leverage compression for these buffers, user space applications must configure the appropriate Page Attribute Table (PAT) index. Display engine will treat all Tile4 as if it were compressed under all circumstances on Xe2 architecture. Notably, this patch series omits support for X-tiled CCS and linear CCS for Xe2, neither of which is supported by display engine. X-tiled CCS offers stateless compression making it less likely to be extensively utilized. Linear CCS does possess state, but currently lacks expected users. These patches aim to enhance the flexibility and efficiency of handling compressed and uncompressed buffers in Xe driver, particularly catering to the specific requirements of the Xe2 architecture. Juha-Pekka Heikkila (3): drm/fourcc: define Intel Xe2 related tile4 ccs modifier drm/xe/display: allow creation of case I915_FORMAT_MOD_4_TILED_XE2_CCS type framebuffer drm/i915/display: allow creation of case I915_FORMAT_MOD_4_TILED_XE2_CCS type framebuffer drivers/gpu/drm/i915/display/intel_display.c | 1 + drivers/gpu/drm/i915/display/intel_fb.c | 10 ++++++++++ drivers/gpu/drm/i915/display/skl_universal_plane.c | 4 +++- drivers/gpu/drm/xe/display/xe_plane_initial.c | 1 + include/uapi/drm/drm_fourcc.h | 12 ++++++++++++ 5 files changed, 27 insertions(+), 1 deletion(-) -- 2.43.2