On Mon, Feb 01, 2021 at 02:01:43PM +0200, Imre Deak wrote:
> Caching EDIDs for physical ports prevents updating the EDID if a port
> gets reconnected via a Connection Status Notification message, fix this.
>
> Fixes: db1a07956968 ("drm/dp_mst: Handle SST-only branch device case")
> Cc: Wayne Lin <Wayne.Lin@xxxxxxx>
> Cc: Lyude Paul <lyude@xxxxxxxxxx>
> Signed-off-by: Imre Deak <imre.deak@xxxxxxxxx>
Pushed patches 2-4 to drm-misc-next, thanks for the review.
> ---
> drivers/gpu/drm/drm_dp_mst_topology.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c
> index deb7995f42fa..309afe61afdd 100644
> --- a/drivers/gpu/drm/drm_dp_mst_topology.c
> +++ b/drivers/gpu/drm/drm_dp_mst_topology.c
> @@ -2302,7 +2302,8 @@ drm_dp_mst_port_add_connector(struct drm_dp_mst_branch *mstb,
> }
>
> if (port->pdt != DP_PEER_DEVICE_NONE &&
> - drm_dp_mst_is_end_device(port->pdt, port->mcs)) {
> + drm_dp_mst_is_end_device(port->pdt, port->mcs) &&
> + port->port_num >= DP_MST_LOGICAL_PORT_0) {
> port->cached_edid = drm_get_edid(port->connector,
> &port->aux.ddc);
> drm_connector_set_tile_property(port->connector);
> --
> 2.25.1
>
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