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 at gmail.com>
Cc: stable at kernel.org
---
drivers/gpu/drm/radeon/radeon_atombios.c | 5 ++---
1 files changed, 2 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/radeon/radeon_atombios.c
b/drivers/gpu/drm/radeon/radeon_atombios.c
index 9149e4a..c2c10e2 100644
--- 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_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 */
--
1.5.6.3
