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Commit 7de56f43 authored by Zhao Yakui's avatar Zhao Yakui Committed by Eric Anholt
Browse files

drm/i915: Validate the mode for eDP by using fixed panel size 



Signed-off-by: default avatarZhao Yakui <yakui.zhao@intel.com>
Reviewed-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Cc: stable@kernel.org
Signed-off-by: default avatarEric Anholt <eric@anholt.net>
parent 0d3a1bee

drivers/gpu/drm/i915/intel_dp.c

+12 −0
Original line number Diff line number Diff line
@@ -150,9 +150,21 @@ intel_dp_mode_valid(struct drm_connector *connector, 
{

	struct drm_encoder *encoder = intel_attached_encoder(connector);

	struct intel_encoder *intel_encoder = enc_to_intel_encoder(encoder);

	struct intel_dp_priv *dp_priv = intel_encoder->dev_priv;

	struct drm_device *dev = connector->dev;

	struct drm_i915_private *dev_priv = dev->dev_private;

	int max_link_clock = intel_dp_link_clock(intel_dp_max_link_bw(intel_encoder));

	int max_lanes = intel_dp_max_lane_count(intel_encoder);



	if ((IS_eDP(intel_encoder) || IS_PCH_eDP(dp_priv)) &&

	    dev_priv->panel_fixed_mode) {

		if (mode->hdisplay > dev_priv->panel_fixed_mode->hdisplay)

			return MODE_PANEL;



		if (mode->vdisplay > dev_priv->panel_fixed_mode->vdisplay)

			return MODE_PANEL;

	}



	/* only refuse the mode on non eDP since we have seen some wierd eDP panels

	   which are outside spec tolerances but somehow work by magic */

	if (!IS_eDP(intel_encoder) &&