Hi Dave,
it seems to be missed call to
drm_mode_connector_set_tile_property(port->connector);
here:
> + } else if (port->pdt == DP_PEER_DEVICE_SST_SINK ||
> + port->pdt == DP_PEER_DEVICE_DP_LEGACY_CONV) {
> + if (!port->cached_edid) {
> + port->cached_edid =
> + drm_get_edid(port->connector, &port->aux.ddc);
drm_mode_connector_set_tile_property(port->connector);
> + }
I will test with tile display to see if it solves the issue.
Thanks,
Mykola
-----Original Message-----
From: Dave Airlie [mailto:airlied@xxxxxxxxx]
Sent: Wednesday, February 17, 2016 1:46 PM
To: Wentland, Harry <Harry.Wentland@xxxxxxx>
Cc: dri-devel <dri-devel@xxxxxxxxxxxxxxxxxxxxx>; Lysenko, Mykola <Mykola.Lysenko@xxxxxxx>
Subject: Re: [PATCH 3/5] drm/dp/mst: change MST detection scheme
On 23 January 2016 at 08:07, Harry Wentland <harry.wentland@xxxxxxx> wrote:
> From: Mykola Lysenko <Mykola.Lysenko@xxxxxxx>
>
> 1. Get edid for all connected MST displays, not only on logical ports,
> in the same thread as MST topology detection is done:
> There are displays that have branches inside w/o logical ports.
> So in case another SST display connected downstream system can
> end-up in situation when 3 DOWN requests sent: two for
> ‘remote i2c read’ and one for ‘enum path resources’, making slots full.
>
> 2. Call notification callback in one place in the end of topology discovery/update:
> This is done to reduce number of events sent to userspace in case complex
> topology discovery is going, adding multiple number of connectors;
>
> 3. Remove notification callback call from short pulse interrupt processing function:
> This is done in order not to block interrupt processing function, in case any
> MST request will be made from it. Notification will be send from topology
> discovery/update work item.
I've had to pull this out, as I did some more indepth testing with
i915 and a Dell 30"
and this broke things.
The main thing it broke is setting the tiling property that userspace
needs to see
those dual-panel monitors as one.
you should be able to see xrandr --props if the tile property is
correct if you test.
I'm also not sure about some other bits in this patch, so I probably need to dig
a bit deeper into it.
Dave.
>
> Signed-off-by: Mykola Lysenko <Mykola.Lysenko@xxxxxxx>
> Reviewed-by: Harry Wentland <Harry.Wentland@xxxxxxx>
> Acked-by: Alex Deucher <alexander.deucher@xxxxxxx>
> ---
> drivers/gpu/drm/drm_dp_mst_topology.c | 37 ++++++++++++++++++-----------------
> 1 file changed, 19 insertions(+), 18 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c
> index 041597b7a7c6..052c20ca35ee 100644
> --- a/drivers/gpu/drm/drm_dp_mst_topology.c
> +++ b/drivers/gpu/drm/drm_dp_mst_topology.c
> @@ -1130,13 +1130,11 @@ static void drm_dp_add_port(struct drm_dp_mst_branch *mstb,
> drm_dp_put_port(port);
> goto out;
> }
> - if (port->port_num >= DP_MST_LOGICAL_PORT_0) {
> - port->cached_edid = drm_get_edid(port->connector, &port->aux.ddc);
> - drm_mode_connector_set_tile_property(port->connector);
> - }
> +
> + drm_mode_connector_set_tile_property(port->connector);
> +
> (*mstb->mgr->cbs->register_connector)(port->connector);
> }
> -
> out:
> /* put reference to this port */
> drm_dp_put_port(port);
> @@ -1161,9 +1159,9 @@ static void drm_dp_update_port(struct drm_dp_mst_branch *mstb,
> port->ddps = conn_stat->displayport_device_plug_status;
>
> if (old_ddps != port->ddps) {
> + dowork = true;
> if (port->ddps) {
> drm_dp_check_port_guid(mstb, port);
> - dowork = true;
> } else {
> port->guid_valid = false;
> port->available_pbn = 0;
> @@ -1271,8 +1269,13 @@ static void drm_dp_check_and_send_link_address(struct drm_dp_mst_topology_mgr *m
> if (port->input)
> continue;
>
> - if (!port->ddps)
> + if (!port->ddps) {
> + if (port->cached_edid) {
> + kfree(port->cached_edid);
> + port->cached_edid = NULL;
> + }
> continue;
> + }
>
> if (!port->available_pbn)
> drm_dp_send_enum_path_resources(mgr, mstb, port);
> @@ -1283,6 +1286,12 @@ static void drm_dp_check_and_send_link_address(struct drm_dp_mst_topology_mgr *m
> drm_dp_check_and_send_link_address(mgr, mstb_child);
> drm_dp_put_mst_branch_device(mstb_child);
> }
> + } else if (port->pdt == DP_PEER_DEVICE_SST_SINK ||
> + port->pdt == DP_PEER_DEVICE_DP_LEGACY_CONV) {
> + if (!port->cached_edid) {
> + port->cached_edid =
> + drm_get_edid(port->connector, &port->aux.ddc);
> + }
> }
> }
> }
> @@ -1302,6 +1311,8 @@ static void drm_dp_mst_link_probe_work(struct work_struct *work)
> drm_dp_check_and_send_link_address(mgr, mstb);
> drm_dp_put_mst_branch_device(mstb);
> }
> +
> + (*mgr->cbs->hotplug)(mgr);
> }
>
> static bool drm_dp_validate_guid(struct drm_dp_mst_topology_mgr *mgr,
> @@ -1558,7 +1569,6 @@ static void drm_dp_send_link_address(struct drm_dp_mst_topology_mgr *mgr,
> for (i = 0; i < txmsg->reply.u.link_addr.nports; i++) {
> drm_dp_add_port(mstb, mgr->dev, &txmsg->reply.u.link_addr.ports[i]);
> }
> - (*mgr->cbs->hotplug)(mgr);
> }
> } else {
> mstb->link_address_sent = false;
> @@ -2232,8 +2242,6 @@ static int drm_dp_mst_handle_up_req(struct drm_dp_mst_topology_mgr *mgr)
>
> drm_dp_update_port(mstb, &msg.u.conn_stat);
> DRM_DEBUG_KMS("Got CSN: pn: %d ldps:%d ddps: %d mcs: %d ip: %d pdt: %d\n", msg.u.conn_stat.port_number, msg.u.conn_stat.legacy_device_plug_status, msg.u.conn_stat.displayport_device_plug_status, msg.u.conn_stat.message_capability_status, msg.u.conn_stat.input_port, msg.u.conn_stat.peer_device_type);
> - (*mgr->cbs->hotplug)(mgr);
> -
> } else if (msg.req_type == DP_RESOURCE_STATUS_NOTIFY) {
> drm_dp_send_up_ack_reply(mgr, mgr->mst_primary, msg.req_type, seqno, false);
> if (!mstb)
> @@ -2320,10 +2328,6 @@ enum drm_connector_status drm_dp_mst_detect_port(struct drm_connector *connector
>
> case DP_PEER_DEVICE_SST_SINK:
> status = connector_status_connected;
> - /* for logical ports - cache the EDID */
> - if (port->port_num >= 8 && !port->cached_edid) {
> - port->cached_edid = drm_get_edid(connector, &port->aux.ddc);
> - }
> break;
> case DP_PEER_DEVICE_DP_LEGACY_CONV:
> if (port->ldps)
> @@ -2378,10 +2382,7 @@ struct edid *drm_dp_mst_get_edid(struct drm_connector *connector, struct drm_dp_
>
> if (port->cached_edid)
> edid = drm_edid_duplicate(port->cached_edid);
> - else {
> - edid = drm_get_edid(connector, &port->aux.ddc);
> - drm_mode_connector_set_tile_property(connector);
> - }
> +
> port->has_audio = drm_detect_monitor_audio(edid);
> drm_dp_put_port(port);
> return edid;
> --
> 2.1.4
>
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