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drm/radeon/kms: reset ddc_bus in object header parsing

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Some LVDS connectors don't have a ddc bus, so reset the
ddc bus to invalid before parsing the next connector
to avoid using stale ddc bus data.  Should fix
fdo bug 28164.

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Cc: stable@kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Alex Deucher 2010-05-18 19:26:46 -04:00 committed by Dave Airlie
parent 6fd0248939
commit 2bfcc0fc69
1 changed files with 2 additions and 3 deletions
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5
drivers/gpu/drm/radeon/radeon_atombios.c
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@ -530,6 +530,8 @@ bool radeon_get_atom_connector_info_from_object_table(struct drm_device *dev)
}
/* look up gpio for ddc, hpd */
ddc_bus.valid = false;
hpd.hpd = RADEON_HPD_NONE;
if ((le16_to_cpu(path->usDeviceTag) &
(ATOM_DEVICE_TV_SUPPORT | ATOM_DEVICE_CV_SUPPORT)) == 0) {
for (j = 0; j < con_obj->ucNumberOfObjects; j++) {
@ -585,9 +587,6 @@ bool radeon_get_atom_connector_info_from_object_table(struct drm_device *dev)
break;
}
}
} else {
hpd.hpd = RADEON_HPD_NONE;
ddc_bus.valid = false;
}
/* needed for aux chan transactions */