[074/200] drm/radeon/kms: reset ddc_bus in object header parsing

From: Greg KH
Date: Thu Jul 01 2010 - 17:51:45 EST


2.6.34-stable review patch. If anyone has any objections, please let me know.

------------------

From: Alex Deucher <alexdeucher@xxxxxxxxx>

commit 2bfcc0fc698d550689ef020c73b2d977b73e728c upstream.

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@xxxxxxxxx>
Signed-off-by: Dave Airlie <airlied@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

---
drivers/gpu/drm/radeon/radeon_atombios.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)

--- a/drivers/gpu/drm/radeon/radeon_atombios.c
+++ b/drivers/gpu/drm/radeon/radeon_atombios.c
@@ -530,6 +530,8 @@ bool radeon_get_atom_connector_info_from
}

/* 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
break;
}
}
- } else {
- hpd.hpd = RADEON_HPD_NONE;
- ddc_bus.valid = false;
}

/* needed for aux chan transactions */


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/