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drm/i915: Don't add panel_fixed_mode to the probed modes list at LVDS init.

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In the case where no EDID data is read from the device, adding the
panel_fixed_mode pointer to the probed modes list causes data corruption.

If the panel_fixed_mode pointer is added to the probed modes list at
init time, a copy of the mode is added again at drm_get_modes() request
time.  Then, the panel_fixed_mode pointer is freed because it is seen as
a duplicate mode.  Unfortunately, this pointer is still stored and used
in mode_fixup().

Because the panel_fixed_mode data is copied and returned at
drm_get_modes() time, it is unnecessary to add this information at init
time.

Signed-off-by: Steve Aarnio <steve.j.aarnio@intel.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Dave Airlie <airlied@linux.ie>
This commit is contained in:
Steve Aarnio 2009-02-12 11:34:02 -08:00 committed by Dave Airlie
parent ea39f83516
commit 67eabc0553
1 changed files with 0 additions and 2 deletions
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2
drivers/gpu/drm/i915/intel_lvds.c
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@ -481,8 +481,6 @@ void intel_lvds_init(struct drm_device *dev)
if (dev_priv->panel_fixed_mode) {
dev_priv->panel_fixed_mode->type |=
DRM_MODE_TYPE_PREFERRED;
drm_mode_probed_add(connector,
dev_priv->panel_fixed_mode);
goto out;
}
}