From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> Rounding to nearest is what we do for most other clock calculations so should probably do that for M/N too. TODO: GOP seems to truncate instead so fastboot is going to be a PITA to get right. Not sure what to do about it yet. Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> --- drivers/gpu/drm/i915/display/intel_display.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c index 89a7c8c1be28..c4257630a3fe 100644 --- a/drivers/gpu/drm/i915/display/intel_display.c +++ b/drivers/gpu/drm/i915/display/intel_display.c @@ -2856,7 +2856,7 @@ static void compute_m_n(u32 *ret_m, u32 *ret_n, else *ret_n = min_t(unsigned int, roundup_pow_of_two(n), DATA_LINK_N_MAX); - *ret_m = div_u64(mul_u32_u32(m, *ret_n), n); + *ret_m = DIV_ROUND_CLOSEST_ULL(mul_u32_u32(m, *ret_n), n); intel_reduce_m_n_ratio(ret_m, ret_n); } @@ -4602,7 +4602,8 @@ int intel_dotclock_calculate(int link_freq, if (!m_n->link_n) return 0; - return div_u64(mul_u32_u32(m_n->link_m, link_freq), m_n->link_n); + return DIV_ROUND_CLOSEST_ULL(mul_u32_u32(m_n->link_m, link_freq), + m_n->link_n); } /* Returns the currently programmed mode of the given encoder. */ -- 2.35.1
