drm/i915/bw: Fix DCLK rounding mess

Fix up the total mess when calculating the DCLK
frequency. Some codepaths are trying to do both DIV_ROUND_UP()
and an open coded "round to nearest" at the same time. The
MTL+ codepath was the only one that was correct (using
DIV_ROUND_CLOSEST()).

Let's unify all of them, and borrow the actual '100/6'
approach from adl_calc_psf_bw() so that we get even less
rounding errors.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patch.msgid.link/20260522200346.17377-3-ville.syrjala@linux.intel.com
Reviewed-by: Vinod Govindapillai <vinod.govindapillai@intel.com>

0 files changed, 0 insertions, 0 deletions