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

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Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: stable@kernel.org
Signed-off-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Zhao Yakui 2010-07-19 09:43:14 +01:00 committed by Eric Anholt
parent 0d3a1beecf
commit 7de56f43e0
1 changed files with 12 additions and 0 deletions
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12
drivers/gpu/drm/i915/intel_dp.c
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@ -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) &&