Commit 949665a6 authored by Ville Syrjälä's avatar Ville Syrjälä
Browse files

drm/i915: Respect VBT seamless DRRS min refresh rate 



Make sure our choice of downclock mode respects the VBT
seameless DRRS min refresh rate limit.

v2: s/vrefesh/vrefresh/ (Jani)

Reviewed-by: default avatarJani Nikula <jani.nikula@intel.com>
Signed-off-by: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220504150440.13748-10-ville.syrjala@linux.intel.com
parent 790b45f1

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

+7 −3
Original line number Diff line number Diff line
@@ -75,13 +75,17 @@ const struct drm_display_mode * 
intel_panel_downclock_mode(struct intel_connector *connector,

			   const struct drm_display_mode *adjusted_mode)

{

	struct drm_i915_private *i915 = to_i915(connector->base.dev);

	const struct drm_display_mode *fixed_mode, *best_mode = NULL;

	int vrefresh = drm_mode_vrefresh(adjusted_mode);

	int min_vrefresh = i915->vbt.seamless_drrs_min_refresh_rate;

	int max_vrefresh = drm_mode_vrefresh(adjusted_mode);



	/* pick the fixed_mode with the lowest refresh rate */

	list_for_each_entry(fixed_mode, &connector->panel.fixed_modes, head) {

		if (drm_mode_vrefresh(fixed_mode) < vrefresh) {

			vrefresh = drm_mode_vrefresh(fixed_mode);

		int vrefresh = drm_mode_vrefresh(fixed_mode);



		if (vrefresh >= min_vrefresh && vrefresh < max_vrefresh) {

			max_vrefresh = vrefresh;

			best_mode = fixed_mode;

		}

	}