drm/i915: Use DIV_ROUND_CLOSEST()

vlv_find_best_dpll() has an open coded DIV_ROUND_CLOSEST(). Replace it
with the real thing.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index fcf22960d88b6172c5dbec195a3e5766bfc1e01d..76870f0ffa7a2b4574de5f57a1053ad8b0c60704 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -695,8 +695,7 @@ vlv_find_best_dpll(const intel_limit_t *limit, struct drm_crtc *crtc,
                                p = p1 * p2;
                                /* based on hardware requirement, prefer bigger m1,m2 values */
                                for (m1 = limit->m1.min; m1 <= limit->m1.max; m1++) {
-                                       m2 = (((2*(fastclk * p * n / m1 )) +
-                                              refclk) / (2*refclk));
+                                       m2 = DIV_ROUND_CLOSEST(fastclk * p * n, refclk * m1);
                                        m = m1 * m2;
                                        vco = updrate * m;