Commit fba99b1a authored by Ville Syrjälä's avatar Ville Syrjälä
Browse files

drm/i915: Parse VRR capability from VBT 



VBT seems to have an extra flag for VRR vs. not. Let's consult
that for eDP panels.

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/20220531191844.11313-2-ville.syrjala@linux.intel.com
parent 04514c14

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

+5 −0
Original line number Diff line number Diff line
@@ -1292,6 +1292,8 @@ parse_power_conservation_features(struct drm_i915_private *i915, 
	const struct bdb_lfp_power *power;

	u8 panel_type = panel->vbt.panel_type;



	panel->vbt.vrr = true; /* matches Windows behaviour */



	if (i915->vbt.version < 228)

		return;
@@ -1312,6 +1314,9 @@ parse_power_conservation_features(struct drm_i915_private *i915, 


	if (i915->vbt.version >= 232)

		panel->vbt.edp.hobl = power->hobl & BIT(panel_type);



	if (i915->vbt.version >= 233)

		panel->vbt.vrr = power->vrr_feature_enabled & BIT(panel_type);

}



static void

drivers/gpu/drm/i915/display/intel_display_types.h

+2 −0
Original line number Diff line number Diff line
@@ -294,6 +294,8 @@ struct intel_vbt_panel_data { 
	unsigned int lvds_dither:1;

	unsigned int bios_lvds_val; /* initial [PCH_]LVDS reg val in VBIOS */



	bool vrr;



	u8 seamless_drrs_min_refresh_rate;

	enum drrs_type drrs_type;

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

+16 −6
Original line number Diff line number Diff line
@@ -15,19 +15,29 @@ bool intel_vrr_is_capable(struct intel_connector *connector) 
	struct drm_i915_private *i915 = to_i915(connector->base.dev);

	struct intel_dp *intel_dp;



	if (connector->base.connector_type != DRM_MODE_CONNECTOR_eDP &&

	    connector->base.connector_type != DRM_MODE_CONNECTOR_DisplayPort)

		return false;



	intel_dp = intel_attached_dp(connector);

	/*

	 * DP Sink is capable of VRR video timings if

	 * Ignore MSA bit is set in DPCD.

	 * EDID monitor range also should be atleast 10 for reasonable

	 * Adaptive Sync or Variable Refresh Rate end user experience.

	 */

	switch (connector->base.connector_type) {

	case DRM_MODE_CONNECTOR_eDP:

		if (!connector->panel.vbt.vrr)

			return false;

		fallthrough;

	case DRM_MODE_CONNECTOR_DisplayPort:

		intel_dp = intel_attached_dp(connector);



		if (!drm_dp_sink_can_do_video_without_timing_msa(intel_dp->dpcd))

			return false;



		break;

	default:

		return false;

	}



	return HAS_VRR(i915) &&

		drm_dp_sink_can_do_video_without_timing_msa(intel_dp->dpcd) &&

		info->monitor_range.max_vfreq - info->monitor_range.min_vfreq > 10;

}