From: Ville Syrjälä Date: Thu, 3 Mar 2022 19:12:04 +0000 (+0200) Subject: drm/i915: Round up when calculating display bandwidth requirements X-Git-Tag: v6.6.17~3937^2~17^2~1474 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=6c69d0bb9f15cdbc8fd6134e2c66438b69bb9581;p=platform%2Fkernel%2Flinux-rpi.git drm/i915: Round up when calculating display bandwidth requirements We should round up when doing bandwidth calculations to make sure our estimates don't fall short of the actual number. Signed-off-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20220303191207.27931-7-ville.syrjala@linux.intel.com Reviewed-by: Stanislav Lisovskiy --- diff --git a/drivers/gpu/drm/i915/display/intel_bw.c b/drivers/gpu/drm/i915/display/intel_bw.c index e991949..8155f23 100644 --- a/drivers/gpu/drm/i915/display/intel_bw.c +++ b/drivers/gpu/drm/i915/display/intel_bw.c @@ -638,7 +638,7 @@ static unsigned int intel_bw_data_rate(struct drm_i915_private *dev_priv, data_rate += bw_state->data_rate[pipe]; if (DISPLAY_VER(dev_priv) >= 13 && intel_vtd_active(dev_priv)) - data_rate = data_rate * 105 / 100; + data_rate = DIV_ROUND_UP(data_rate * 105, 100); return data_rate; } @@ -763,7 +763,7 @@ int intel_bw_calc_min_cdclk(struct intel_atomic_state *state) } } - new_bw_state->min_cdclk = max_bw / 64; + new_bw_state->min_cdclk = DIV_ROUND_UP(max_bw, 64); if (new_bw_state->min_cdclk != old_bw_state->min_cdclk) { int ret = intel_atomic_lock_global_state(&new_bw_state->base);