Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 2bfcc0fc authored by Alex Deucher's avatar Alex Deucher Committed by Dave Airlie
Browse files

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



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: default avatarAlex Deucher <alexdeucher@gmail.com>
Cc: stable@kernel.org
Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent 6fd02489

drivers/gpu/drm/radeon/radeon_atombios.c

+2 −3
Original line number Diff line number Diff line
@@ -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 */