drm/amd/display: Clear connector's edid pointer

BugLink: http://bugs.launchpad.net/bugs/1808185
commit 5326c4525d1b2d5f1519268dd305e19c9bd4ef56 upstream.

Clear connector's edid pointer on coonnector update, when unplugging
the display.

Fix poison EDID when hotplugging on previously used connector.

Signed-off-by: Mikita Lipski <mikita.lipski@amd.com>
Reviewed-by: Harry Wentland <Harry.Wentland@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com>

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index b3a818eb01dd2f2389151bbfd7086cf16d003267..8a669581eb08308d021e452cb9f68b538b1b559e 100644 (file)
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -904,6 +904,7 @@ amdgpu_dm_update_connector_after_detect(struct amdgpu_dm_connector *aconnector)
                drm_mode_connector_update_edid_property(connector, NULL);
                aconnector->num_modes = 0;
                aconnector->dc_sink = NULL;
+               aconnector->edid = NULL;
        }
 
        mutex_unlock(&dev->mode_config.mutex);