drm/nouveau/kms/nv50: initial support for DP 1.2 multi-stream
authorBen Skeggs <bskeggs@redhat.com>
Fri, 4 Nov 2016 07:20:36 +0000 (17:20 +1000)
committerBen Skeggs <bskeggs@redhat.com>
Mon, 7 Nov 2016 04:05:03 +0000 (14:05 +1000)
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
drivers/gpu/drm/nouveau/nouveau_connector.c
drivers/gpu/drm/nouveau/nouveau_dp.c
drivers/gpu/drm/nouveau/nouveau_encoder.h
drivers/gpu/drm/nouveau/nv50_display.c

index 5df390809f929b1b7ec5c7b688a729d8e694e646..947c200655b4d1da0c0ea77d6ceaf47cdb7d776d 100644 (file)
@@ -1118,12 +1118,21 @@ nouveau_connector_hotplug(struct nvif_notify *notify)
        struct nouveau_drm *drm = nouveau_drm(connector->dev);
        const struct nvif_notify_conn_rep_v0 *rep = notify->data;
        const char *name = connector->name;
+       struct nouveau_encoder *nv_encoder;
 
        if (rep->mask & NVIF_NOTIFY_CONN_V0_IRQ) {
+               NV_DEBUG(drm, "service %s\n", name);
+               if ((nv_encoder = find_encoder(connector, DCB_OUTPUT_DP)))
+                       nv50_mstm_service(nv_encoder->dp.mstm);
        } else {
                bool plugged = (rep->mask != NVIF_NOTIFY_CONN_V0_UNPLUG);
 
                NV_DEBUG(drm, "%splugged %s\n", plugged ? "" : "un", name);
+               if ((nv_encoder = find_encoder(connector, DCB_OUTPUT_DP))) {
+                       if (!plugged)
+                               nv50_mstm_remove(nv_encoder->dp.mstm);
+               }
+
                drm_helper_hpd_irq_event(connector->dev);
        }
 
index ddffb5cde673616b999cd5a28aa857300908cdc2..0d052e1660f839b4dee6b68b13590982fc33c00c 100644 (file)
 #include <nvif/class.h>
 #include <nvif/cl5070.h>
 
+MODULE_PARM_DESC(mst, "Enable DisplayPort multi-stream (default: enabled)");
+static int nouveau_mst = 1;
+module_param_named(mst, nouveau_mst, int, 0400);
+
 static void
 nouveau_dp_probe_oui(struct drm_device *dev, struct nvkm_i2c_aux *aux, u8 *dpcd)
 {
@@ -88,7 +92,9 @@ nouveau_dp_detect(struct nouveau_encoder *nv_encoder)
 
        nouveau_dp_probe_oui(dev, aux, dpcd);
 
-       ret = nv50_mstm_detect(nv_encoder->dp.mstm, dpcd, 0);
+       ret = nv50_mstm_detect(nv_encoder->dp.mstm, dpcd, nouveau_mst);
+       if (ret == 1)
+               return NOUVEAU_DP_MST;
        if (ret == 0)
                return NOUVEAU_DP_SST;
        return ret;
index 848982bd18e961ee6f014a9620625e152fcb2ad1..198e5f27682ff64f31e61daf2f2a3d67d244db7e 100644 (file)
@@ -103,4 +103,6 @@ struct nouveau_connector *
 nouveau_encoder_connector_get(struct nouveau_encoder *encoder);
 
 int nv50_mstm_detect(struct nv50_mstm *, u8 dpcd[8], int allow);
+void nv50_mstm_remove(struct nv50_mstm *);
+void nv50_mstm_service(struct nv50_mstm *);
 #endif /* __NOUVEAU_ENCODER_H__ */
index 854fa31eddb6200a6aa0fd31a9f92baa8f231c5c..a9855a4ec5329626c04086f25b22310433af289e 100644 (file)
@@ -2804,12 +2804,502 @@ nv50_hdmi_enable(struct drm_encoder *encoder, struct drm_display_mode *mode)
 /******************************************************************************
  * MST
  *****************************************************************************/
+#define nv50_mstm(p) container_of((p), struct nv50_mstm, mgr)
+#define nv50_mstc(p) container_of((p), struct nv50_mstc, connector)
+#define nv50_msto(p) container_of((p), struct nv50_msto, encoder)
+
 struct nv50_mstm {
        struct nouveau_encoder *outp;
 
        struct drm_dp_mst_topology_mgr mgr;
+       struct nv50_msto *msto[4];
+
+       bool modified;
+};
+
+struct nv50_mstc {
+       struct nv50_mstm *mstm;
+       struct drm_dp_mst_port *port;
+       struct drm_connector connector;
+
+       struct drm_display_mode *native;
+       struct edid *edid;
+
+       int pbn;
 };
 
+struct nv50_msto {
+       struct drm_encoder encoder;
+
+       struct nv50_head *head;
+       struct nv50_mstc *mstc;
+       bool disabled;
+};
+
+static struct drm_dp_payload *
+nv50_msto_payload(struct nv50_msto *msto)
+{
+       struct nouveau_drm *drm = nouveau_drm(msto->encoder.dev);
+       struct nv50_mstc *mstc = msto->mstc;
+       struct nv50_mstm *mstm = mstc->mstm;
+       int vcpi = mstc->port->vcpi.vcpi, i;
+
+       NV_ATOMIC(drm, "%s: vcpi %d\n", msto->encoder.name, vcpi);
+       for (i = 0; i < mstm->mgr.max_payloads; i++) {
+               struct drm_dp_payload *payload = &mstm->mgr.payloads[i];
+               NV_ATOMIC(drm, "%s: %d: vcpi %d start 0x%02x slots 0x%02x\n",
+                         mstm->outp->base.base.name, i, payload->vcpi,
+                         payload->start_slot, payload->num_slots);
+       }
+
+       for (i = 0; i < mstm->mgr.max_payloads; i++) {
+               struct drm_dp_payload *payload = &mstm->mgr.payloads[i];
+               if (payload->vcpi == vcpi)
+                       return payload;
+       }
+
+       return NULL;
+}
+
+static void
+nv50_msto_cleanup(struct nv50_msto *msto)
+{
+       struct nouveau_drm *drm = nouveau_drm(msto->encoder.dev);
+       struct nv50_mstc *mstc = msto->mstc;
+       struct nv50_mstm *mstm = mstc->mstm;
+
+       NV_ATOMIC(drm, "%s: msto cleanup\n", msto->encoder.name);
+       if (mstc->port && mstc->port->vcpi.vcpi > 0 && !nv50_msto_payload(msto))
+               drm_dp_mst_deallocate_vcpi(&mstm->mgr, mstc->port);
+       if (msto->disabled) {
+               msto->mstc = NULL;
+               msto->head = NULL;
+               msto->disabled = false;
+       }
+}
+
+static void
+nv50_msto_prepare(struct nv50_msto *msto)
+{
+       struct nouveau_drm *drm = nouveau_drm(msto->encoder.dev);
+       struct nv50_mstc *mstc = msto->mstc;
+       struct nv50_mstm *mstm = mstc->mstm;
+       struct {
+               struct nv50_disp_mthd_v1 base;
+               struct nv50_disp_sor_dp_mst_vcpi_v0 vcpi;
+       } args = {
+               .base.version = 1,
+               .base.method = NV50_DISP_MTHD_V1_SOR_DP_MST_VCPI,
+               .base.hasht  = mstm->outp->dcb->hasht,
+               .base.hashm  = (0xf0ff & mstm->outp->dcb->hashm) |
+                              (0x0100 << msto->head->base.index),
+       };
+
+       NV_ATOMIC(drm, "%s: msto prepare\n", msto->encoder.name);
+       if (mstc->port && mstc->port->vcpi.vcpi > 0) {
+               struct drm_dp_payload *payload = nv50_msto_payload(msto);
+               if (payload) {
+                       args.vcpi.start_slot = payload->start_slot;
+                       args.vcpi.num_slots = payload->num_slots;
+                       args.vcpi.pbn = mstc->port->vcpi.pbn;
+                       args.vcpi.aligned_pbn = mstc->port->vcpi.aligned_pbn;
+               }
+       }
+
+       NV_ATOMIC(drm, "%s: %s: %02x %02x %04x %04x\n",
+                 msto->encoder.name, msto->head->base.base.name,
+                 args.vcpi.start_slot, args.vcpi.num_slots,
+                 args.vcpi.pbn, args.vcpi.aligned_pbn);
+       nvif_mthd(&drm->display->disp, 0, &args, sizeof(args));
+}
+
+static int
+nv50_msto_atomic_check(struct drm_encoder *encoder,
+                      struct drm_crtc_state *crtc_state,
+                      struct drm_connector_state *conn_state)
+{
+       struct nv50_mstc *mstc = nv50_mstc(conn_state->connector);
+       struct nv50_mstm *mstm = mstc->mstm;
+       int bpp = conn_state->connector->display_info.bpc * 3;
+       int slots;
+
+       mstc->pbn = drm_dp_calc_pbn_mode(crtc_state->adjusted_mode.clock, bpp);
+
+       slots = drm_dp_find_vcpi_slots(&mstm->mgr, mstc->pbn);
+       if (slots < 0)
+               return slots;
+
+       return nv50_outp_atomic_check_view(encoder, crtc_state, conn_state,
+                                          mstc->native);
+}
+
+static void
+nv50_msto_enable(struct drm_encoder *encoder)
+{
+       struct nv50_head *head = nv50_head(encoder->crtc);
+       struct nv50_msto *msto = nv50_msto(encoder);
+       struct nv50_mstc *mstc = NULL;
+       struct nv50_mstm *mstm = NULL;
+       struct drm_connector *connector;
+       u8 proto, depth;
+       int slots;
+       bool r;
+
+       drm_for_each_connector(connector, encoder->dev) {
+               if (connector->state->best_encoder == &msto->encoder) {
+                       mstc = nv50_mstc(connector);
+                       mstm = mstc->mstm;
+                       break;
+               }
+       }
+
+       if (WARN_ON(!mstc))
+               return;
+
+       r = drm_dp_mst_allocate_vcpi(&mstm->mgr, mstc->port, mstc->pbn, &slots);
+       WARN_ON(!r);
+
+       if (mstm->outp->dcb->sorconf.link & 1)
+               proto = 0x8;
+       else
+               proto = 0x9;
+
+       switch (mstc->connector.display_info.bpc) {
+       case  6: depth = 0x2; break;
+       case  8: depth = 0x5; break;
+       case 10:
+       default: depth = 0x6; break;
+       }
+
+       mstm->outp->update(mstm->outp, head->base.index,
+                          &head->base.base.state->adjusted_mode, proto, depth);
+
+       msto->head = head;
+       msto->mstc = mstc;
+       mstm->modified = true;
+}
+
+static void
+nv50_msto_disable(struct drm_encoder *encoder)
+{
+       struct nv50_msto *msto = nv50_msto(encoder);
+       struct nv50_mstc *mstc = msto->mstc;
+       struct nv50_mstm *mstm = mstc->mstm;
+
+       if (mstc->port)
+               drm_dp_mst_reset_vcpi_slots(&mstm->mgr, mstc->port);
+
+       mstm->outp->update(mstm->outp, msto->head->base.index, NULL, 0, 0);
+       mstm->modified = true;
+       msto->disabled = true;
+}
+
+static const struct drm_encoder_helper_funcs
+nv50_msto_help = {
+       .disable = nv50_msto_disable,
+       .enable = nv50_msto_enable,
+       .atomic_check = nv50_msto_atomic_check,
+};
+
+static void
+nv50_msto_destroy(struct drm_encoder *encoder)
+{
+       struct nv50_msto *msto = nv50_msto(encoder);
+       drm_encoder_cleanup(&msto->encoder);
+       kfree(msto);
+}
+
+static const struct drm_encoder_funcs
+nv50_msto = {
+       .destroy = nv50_msto_destroy,
+};
+
+static int
+nv50_msto_new(struct drm_device *dev, u32 heads, const char *name, int id,
+             struct nv50_msto **pmsto)
+{
+       struct nv50_msto *msto;
+       int ret;
+
+       if (!(msto = *pmsto = kzalloc(sizeof(*msto), GFP_KERNEL)))
+               return -ENOMEM;
+
+       ret = drm_encoder_init(dev, &msto->encoder, &nv50_msto,
+                              DRM_MODE_ENCODER_DPMST, "%s-mst-%d", name, id);
+       if (ret) {
+               kfree(*pmsto);
+               *pmsto = NULL;
+               return ret;
+       }
+
+       drm_encoder_helper_add(&msto->encoder, &nv50_msto_help);
+       msto->encoder.possible_crtcs = heads;
+       return 0;
+}
+
+static struct drm_encoder *
+nv50_mstc_atomic_best_encoder(struct drm_connector *connector,
+                             struct drm_connector_state *connector_state)
+{
+       struct nv50_head *head = nv50_head(connector_state->crtc);
+       struct nv50_mstc *mstc = nv50_mstc(connector);
+       if (mstc->port) {
+               struct nv50_mstm *mstm = mstc->mstm;
+               return &mstm->msto[head->base.index]->encoder;
+       }
+       return NULL;
+}
+
+static struct drm_encoder *
+nv50_mstc_best_encoder(struct drm_connector *connector)
+{
+       struct nv50_mstc *mstc = nv50_mstc(connector);
+       if (mstc->port) {
+               struct nv50_mstm *mstm = mstc->mstm;
+               return &mstm->msto[0]->encoder;
+       }
+       return NULL;
+}
+
+static enum drm_mode_status
+nv50_mstc_mode_valid(struct drm_connector *connector,
+                    struct drm_display_mode *mode)
+{
+       return MODE_OK;
+}
+
+static int
+nv50_mstc_get_modes(struct drm_connector *connector)
+{
+       struct nv50_mstc *mstc = nv50_mstc(connector);
+       int ret = 0;
+
+       mstc->edid = drm_dp_mst_get_edid(&mstc->connector, mstc->port->mgr, mstc->port);
+       drm_mode_connector_update_edid_property(&mstc->connector, mstc->edid);
+       if (mstc->edid) {
+               ret = drm_add_edid_modes(&mstc->connector, mstc->edid);
+               drm_edid_to_eld(&mstc->connector, mstc->edid);
+       }
+
+       if (!mstc->connector.display_info.bpc)
+               mstc->connector.display_info.bpc = 8;
+
+       if (mstc->native)
+               drm_mode_destroy(mstc->connector.dev, mstc->native);
+       mstc->native = nouveau_conn_native_mode(&mstc->connector);
+       return ret;
+}
+
+static const struct drm_connector_helper_funcs
+nv50_mstc_help = {
+       .get_modes = nv50_mstc_get_modes,
+       .mode_valid = nv50_mstc_mode_valid,
+       .best_encoder = nv50_mstc_best_encoder,
+       .atomic_best_encoder = nv50_mstc_atomic_best_encoder,
+};
+
+static enum drm_connector_status
+nv50_mstc_detect(struct drm_connector *connector, bool force)
+{
+       struct nv50_mstc *mstc = nv50_mstc(connector);
+       if (!mstc->port)
+               return connector_status_disconnected;
+       return drm_dp_mst_detect_port(connector, mstc->port->mgr, mstc->port);
+}
+
+static void
+nv50_mstc_destroy(struct drm_connector *connector)
+{
+       struct nv50_mstc *mstc = nv50_mstc(connector);
+       drm_connector_cleanup(&mstc->connector);
+       kfree(mstc);
+}
+
+static const struct drm_connector_funcs
+nv50_mstc = {
+       .dpms = drm_atomic_helper_connector_dpms,
+       .reset = nouveau_conn_reset,
+       .detect = nv50_mstc_detect,
+       .fill_modes = drm_helper_probe_single_connector_modes,
+       .set_property = drm_atomic_helper_connector_set_property,
+       .destroy = nv50_mstc_destroy,
+       .atomic_duplicate_state = nouveau_conn_atomic_duplicate_state,
+       .atomic_destroy_state = nouveau_conn_atomic_destroy_state,
+       .atomic_set_property = nouveau_conn_atomic_set_property,
+       .atomic_get_property = nouveau_conn_atomic_get_property,
+};
+
+static int
+nv50_mstc_new(struct nv50_mstm *mstm, struct drm_dp_mst_port *port,
+             const char *path, struct nv50_mstc **pmstc)
+{
+       struct drm_device *dev = mstm->outp->base.base.dev;
+       struct nv50_mstc *mstc;
+       int ret, i;
+
+       if (!(mstc = *pmstc = kzalloc(sizeof(*mstc), GFP_KERNEL)))
+               return -ENOMEM;
+       mstc->mstm = mstm;
+       mstc->port = port;
+
+       ret = drm_connector_init(dev, &mstc->connector, &nv50_mstc,
+                                DRM_MODE_CONNECTOR_DisplayPort);
+       if (ret) {
+               kfree(*pmstc);
+               *pmstc = NULL;
+               return ret;
+       }
+
+       drm_connector_helper_add(&mstc->connector, &nv50_mstc_help);
+
+       mstc->connector.funcs->reset(&mstc->connector);
+       nouveau_conn_attach_properties(&mstc->connector);
+
+       for (i = 0; i < ARRAY_SIZE(mstm->msto) && mstm->msto; i++)
+               drm_mode_connector_attach_encoder(&mstc->connector, &mstm->msto[i]->encoder);
+
+       drm_object_attach_property(&mstc->connector.base, dev->mode_config.path_property, 0);
+       drm_object_attach_property(&mstc->connector.base, dev->mode_config.tile_property, 0);
+       drm_mode_connector_set_path_property(&mstc->connector, path);
+       return 0;
+}
+
+static void
+nv50_mstm_cleanup(struct nv50_mstm *mstm)
+{
+       struct nouveau_drm *drm = nouveau_drm(mstm->outp->base.base.dev);
+       struct drm_encoder *encoder;
+       int ret;
+
+       NV_ATOMIC(drm, "%s: mstm cleanup\n", mstm->outp->base.base.name);
+       ret = drm_dp_check_act_status(&mstm->mgr);
+
+       ret = drm_dp_update_payload_part2(&mstm->mgr);
+
+       drm_for_each_encoder(encoder, mstm->outp->base.base.dev) {
+               if (encoder->encoder_type == DRM_MODE_ENCODER_DPMST) {
+                       struct nv50_msto *msto = nv50_msto(encoder);
+                       struct nv50_mstc *mstc = msto->mstc;
+                       if (mstc && mstc->mstm == mstm)
+                               nv50_msto_cleanup(msto);
+               }
+       }
+
+       mstm->modified = false;
+}
+
+static void
+nv50_mstm_prepare(struct nv50_mstm *mstm)
+{
+       struct nouveau_drm *drm = nouveau_drm(mstm->outp->base.base.dev);
+       struct drm_encoder *encoder;
+       int ret;
+
+       NV_ATOMIC(drm, "%s: mstm prepare\n", mstm->outp->base.base.name);
+       ret = drm_dp_update_payload_part1(&mstm->mgr);
+
+       drm_for_each_encoder(encoder, mstm->outp->base.base.dev) {
+               if (encoder->encoder_type == DRM_MODE_ENCODER_DPMST) {
+                       struct nv50_msto *msto = nv50_msto(encoder);
+                       struct nv50_mstc *mstc = msto->mstc;
+                       if (mstc && mstc->mstm == mstm)
+                               nv50_msto_prepare(msto);
+               }
+       }
+}
+
+static void
+nv50_mstm_hotplug(struct drm_dp_mst_topology_mgr *mgr)
+{
+       struct nv50_mstm *mstm = nv50_mstm(mgr);
+       drm_kms_helper_hotplug_event(mstm->outp->base.base.dev);
+}
+
+static void
+nv50_mstm_destroy_connector(struct drm_dp_mst_topology_mgr *mgr,
+                           struct drm_connector *connector)
+{
+       struct nouveau_drm *drm = nouveau_drm(connector->dev);
+       struct nv50_mstc *mstc = nv50_mstc(connector);
+
+       drm_connector_unregister(&mstc->connector);
+
+       drm_modeset_lock_all(drm->dev);
+       drm_fb_helper_remove_one_connector(&drm->fbcon->helper, &mstc->connector);
+       mstc->port = NULL;
+       drm_modeset_unlock_all(drm->dev);
+
+       drm_connector_unreference(&mstc->connector);
+}
+
+static void
+nv50_mstm_register_connector(struct drm_connector *connector)
+{
+       struct nouveau_drm *drm = nouveau_drm(connector->dev);
+
+       drm_modeset_lock_all(drm->dev);
+       drm_fb_helper_add_one_connector(&drm->fbcon->helper, connector);
+       drm_modeset_unlock_all(drm->dev);
+
+       drm_connector_register(connector);
+}
+
+static struct drm_connector *
+nv50_mstm_add_connector(struct drm_dp_mst_topology_mgr *mgr,
+                       struct drm_dp_mst_port *port, const char *path)
+{
+       struct nv50_mstm *mstm = nv50_mstm(mgr);
+       struct nv50_mstc *mstc;
+       int ret;
+
+       ret = nv50_mstc_new(mstm, port, path, &mstc);
+       if (ret) {
+               if (mstc)
+                       mstc->connector.funcs->destroy(&mstc->connector);
+               return NULL;
+       }
+
+       return &mstc->connector;
+}
+
+static const struct drm_dp_mst_topology_cbs
+nv50_mstm = {
+       .add_connector = nv50_mstm_add_connector,
+       .register_connector = nv50_mstm_register_connector,
+       .destroy_connector = nv50_mstm_destroy_connector,
+       .hotplug = nv50_mstm_hotplug,
+};
+
+void
+nv50_mstm_service(struct nv50_mstm *mstm)
+{
+       struct drm_dp_aux *aux = mstm->mgr.aux;
+       bool handled = true;
+       int ret;
+       u8 esi[8] = {};
+
+       while (handled) {
+               ret = drm_dp_dpcd_read(aux, DP_SINK_COUNT_ESI, esi, 8);
+               if (ret != 8) {
+                       drm_dp_mst_topology_mgr_set_mst(&mstm->mgr, false);
+                       return;
+               }
+
+               drm_dp_mst_hpd_irq(&mstm->mgr, esi, &handled);
+               if (!handled)
+                       break;
+
+               drm_dp_dpcd_write(aux, DP_SINK_COUNT_ESI + 1, &esi[1], 3);
+       }
+}
+
+void
+nv50_mstm_remove(struct nv50_mstm *mstm)
+{
+       if (mstm)
+               drm_dp_mst_topology_mgr_set_mst(&mstm->mgr, false);
+}
+
 static int
 nv50_mstm_enable(struct nv50_mstm *mstm, u8 dpcd, int state)
 {
@@ -2872,6 +3362,20 @@ nv50_mstm_detect(struct nv50_mstm *mstm, u8 dpcd[8], int allow)
        return mstm->mgr.mst_state;
 }
 
+static void
+nv50_mstm_fini(struct nv50_mstm *mstm)
+{
+       if (mstm && mstm->mgr.mst_state)
+               drm_dp_mst_topology_mgr_suspend(&mstm->mgr);
+}
+
+static void
+nv50_mstm_init(struct nv50_mstm *mstm)
+{
+       if (mstm && mstm->mgr.mst_state)
+               drm_dp_mst_topology_mgr_resume(&mstm->mgr);
+}
+
 static void
 nv50_mstm_del(struct nv50_mstm **pmstm)
 {
@@ -2889,17 +3393,36 @@ nv50_mstm_new(struct nouveau_encoder *outp, struct drm_dp_aux *aux, int aux_max,
        const int max_payloads = hweight8(outp->dcb->heads);
        struct drm_device *dev = outp->base.base.dev;
        struct nv50_mstm *mstm;
-       int ret;
+       int ret, i;
+       u8 dpcd;
+
+       /* This is a workaround for some monitors not functioning
+        * correctly in MST mode on initial module load.  I think
+        * some bad interaction with the VBIOS may be responsible.
+        *
+        * A good ol' off and on again seems to work here ;)
+        */
+       ret = drm_dp_dpcd_readb(aux, DP_DPCD_REV, &dpcd);
+       if (ret >= 0 && dpcd >= 0x12)
+               drm_dp_dpcd_writeb(aux, DP_MSTM_CTRL, 0);
 
        if (!(mstm = *pmstm = kzalloc(sizeof(*mstm), GFP_KERNEL)))
                return -ENOMEM;
        mstm->outp = outp;
+       mstm->mgr.cbs = &nv50_mstm;
 
        ret = drm_dp_mst_topology_mgr_init(&mstm->mgr, dev->dev, aux, aux_max,
                                           max_payloads, conn_base_id);
        if (ret)
                return ret;
 
+       for (i = 0; i < max_payloads; i++) {
+               ret = nv50_msto_new(dev, outp->dcb->heads, outp->base.base.name,
+                                   i, &mstm->msto[i]);
+               if (ret)
+                       return ret;
+       }
+
        return 0;
 }
 
@@ -3364,10 +3887,20 @@ nv50_disp_atomic_commit_core(struct nouveau_drm *drm, u32 interlock)
 {
        struct nv50_disp *disp = nv50_disp(drm->dev);
        struct nv50_dmac *core = &disp->mast.base;
+       struct nv50_mstm *mstm;
+       struct drm_encoder *encoder;
        u32 *push;
 
        NV_ATOMIC(drm, "commit core %08x\n", interlock);
 
+       drm_for_each_encoder(encoder, drm->dev) {
+               if (encoder->encoder_type != DRM_MODE_ENCODER_DPMST) {
+                       mstm = nouveau_encoder(encoder)->dp.mstm;
+                       if (mstm && mstm->modified)
+                               nv50_mstm_prepare(mstm);
+               }
+       }
+
        if ((push = evo_wait(core, 5))) {
                evo_mthd(push, 0x0084, 1);
                evo_data(push, 0x80000000);
@@ -3383,6 +3916,14 @@ nv50_disp_atomic_commit_core(struct nouveau_drm *drm, u32 interlock)
                ) < 0)
                        NV_ERROR(drm, "EVO timeout\n");
        }
+
+       drm_for_each_encoder(encoder, drm->dev) {
+               if (encoder->encoder_type != DRM_MODE_ENCODER_DPMST) {
+                       mstm = nouveau_encoder(encoder)->dp.mstm;
+                       if (mstm && mstm->modified)
+                               nv50_mstm_cleanup(mstm);
+               }
+       }
 }
 
 static void
@@ -3792,6 +4333,8 @@ nv50_disp_func = {
 void
 nv50_display_fini(struct drm_device *dev)
 {
+       struct nouveau_encoder *nv_encoder;
+       struct drm_encoder *encoder;
        struct drm_plane *plane;
 
        drm_for_each_plane(plane, dev) {
@@ -3800,6 +4343,13 @@ nv50_display_fini(struct drm_device *dev)
                        continue;
                nv50_wndw_fini(wndw);
        }
+
+       list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
+               if (encoder->encoder_type != DRM_MODE_ENCODER_DPMST) {
+                       nv_encoder = nouveau_encoder(encoder);
+                       nv50_mstm_fini(nv_encoder->dp.mstm);
+               }
+       }
 }
 
 int
@@ -3827,6 +4377,8 @@ nv50_display_init(struct drm_device *dev)
                        help = encoder->helper_private;
                        if (help && help->dpms)
                                help->dpms(encoder, DRM_MODE_DPMS_ON);
+
+                       nv50_mstm_init(nv_encoder->dp.mstm);
                }
        }