drm/i915/fbc: Extract intel_fbc_cfb_cpp()

Extract a helper to determine the CFB bytes per pixel value.
Currently this is always 4, but that could change in the
future.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240705145254.3355-14-ville.syrjala@linux.intel.com
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
This commit is contained in:
Ville Syrjälä 2024-07-05 17:52:47 +03:00
commit d43caea1fa