Commit 6c69d0bb authored by Ville Syrjälä's avatar Ville Syrjälä
Browse files

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: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220303191207.27931-7-ville.syrjala@linux.intel.com


Reviewed-by: default avatarStanislav Lisovskiy <stanislav.lisovskiy@intel.com>
parent 7243867c

drivers/gpu/drm/i915/display/intel_bw.c

+2 −2
Original line number Diff line number Diff line
@@ -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);