diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nv50_display.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nv50_display.c | 131 |
1 files changed, 123 insertions, 8 deletions
diff --git a/drivers/gpu/drm/nouveau/nv50_display.c b/drivers/gpu/drm/nouveau/nv50_display.c index 99a3866efbc2..1f4e1370ea7d 100644 --- a/drivers/gpu/drm/nouveau/nv50_display.c +++ b/drivers/gpu/drm/nouveau/nv50_display.c @@ -1841,6 +1841,108 @@ nv50_hdmi_disconnect(struct drm_encoder *encoder, struct nouveau_crtc *nv_crtc) } /****************************************************************************** + * MST + *****************************************************************************/ +struct nv50_mstm { + struct nouveau_encoder *outp; + + struct drm_dp_mst_topology_mgr mgr; +}; + +static int +nv50_mstm_enable(struct nv50_mstm *mstm, u8 dpcd, int state) +{ + struct nouveau_encoder *outp = mstm->outp; + struct { + struct nv50_disp_mthd_v1 base; + struct nv50_disp_sor_dp_mst_link_v0 mst; + } args = { + .base.version = 1, + .base.method = NV50_DISP_MTHD_V1_SOR_DP_MST_LINK, + .base.hasht = outp->dcb->hasht, + .base.hashm = outp->dcb->hashm, + .mst.state = state, + }; + struct nouveau_drm *drm = nouveau_drm(outp->base.base.dev); + struct nvif_object *disp = &drm->display->disp; + int ret; + + if (dpcd >= 0x12) { + ret = drm_dp_dpcd_readb(mstm->mgr.aux, DP_MSTM_CTRL, &dpcd); + if (ret < 0) + return ret; + + dpcd &= ~DP_MST_EN; + if (state) + dpcd |= DP_MST_EN; + + ret = drm_dp_dpcd_writeb(mstm->mgr.aux, DP_MSTM_CTRL, dpcd); + if (ret < 0) + return ret; + } + + return nvif_mthd(disp, 0, &args, sizeof(args)); +} + +int +nv50_mstm_detect(struct nv50_mstm *mstm, u8 dpcd[8], int allow) +{ + int ret, state = 0; + + if (!mstm) + return 0; + + if (dpcd[0] >= 0x12 && allow) { + ret = drm_dp_dpcd_readb(mstm->mgr.aux, DP_MSTM_CAP, &dpcd[1]); + if (ret < 0) + return ret; + + state = dpcd[1] & DP_MST_CAP; + } + + ret = nv50_mstm_enable(mstm, dpcd[0], state); + if (ret) + return ret; + + ret = drm_dp_mst_topology_mgr_set_mst(&mstm->mgr, state); + if (ret) + return nv50_mstm_enable(mstm, dpcd[0], 0); + + return mstm->mgr.mst_state; +} + +static void +nv50_mstm_del(struct nv50_mstm **pmstm) +{ + struct nv50_mstm *mstm = *pmstm; + if (mstm) { + kfree(*pmstm); + *pmstm = NULL; + } +} + +static int +nv50_mstm_new(struct nouveau_encoder *outp, struct drm_dp_aux *aux, int aux_max, + int conn_base_id, struct nv50_mstm **pmstm) +{ + const int max_payloads = hweight8(outp->dcb->heads); + struct drm_device *dev = outp->base.base.dev; + struct nv50_mstm *mstm; + int ret; + + if (!(mstm = *pmstm = kzalloc(sizeof(*mstm), GFP_KERNEL))) + return -ENOMEM; + mstm->outp = outp; + + ret = drm_dp_mst_topology_mgr_init(&mstm->mgr, dev->dev, aux, aux_max, + max_payloads, conn_base_id); + if (ret) + return ret; + + return 0; +} + +/****************************************************************************** * SOR *****************************************************************************/ static void @@ -2078,6 +2180,8 @@ nv50_sor_mode_set(struct drm_encoder *encoder, struct drm_display_mode *umode, static void nv50_sor_destroy(struct drm_encoder *encoder) { + struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder); + nv50_mstm_del(&nv_encoder->dp.mstm); drm_encoder_cleanup(encoder); kfree(encoder); } @@ -2099,11 +2203,12 @@ static const struct drm_encoder_funcs nv50_sor_func = { static int nv50_sor_create(struct drm_connector *connector, struct dcb_output *dcbe) { + struct nouveau_connector *nv_connector = nouveau_connector(connector); struct nouveau_drm *drm = nouveau_drm(connector->dev); struct nvkm_i2c *i2c = nvxx_i2c(&drm->device); struct nouveau_encoder *nv_encoder; struct drm_encoder *encoder; - int type; + int type, ret; switch (dcbe->type) { case DCB_OUTPUT_LVDS: type = DRM_MODE_ENCODER_LVDS; break; @@ -2121,6 +2226,14 @@ nv50_sor_create(struct drm_connector *connector, struct dcb_output *dcbe) nv_encoder->or = ffs(dcbe->or) - 1; nv_encoder->last_dpms = DRM_MODE_DPMS_OFF; + encoder = to_drm_encoder(nv_encoder); + encoder->possible_crtcs = dcbe->heads; + encoder->possible_clones = 0; + drm_encoder_init(connector->dev, encoder, &nv50_sor_func, type, NULL); + drm_encoder_helper_add(encoder, &nv50_sor_hfunc); + + drm_mode_connector_attach_encoder(connector, encoder); + if (dcbe->type == DCB_OUTPUT_DP) { struct nvkm_i2c_aux *aux = nvkm_i2c_aux_find(i2c, dcbe->i2c_index); @@ -2128,6 +2241,15 @@ nv50_sor_create(struct drm_connector *connector, struct dcb_output *dcbe) nv_encoder->i2c = &aux->i2c; nv_encoder->aux = aux; } + + /*TODO: Use DP Info Table to check for support. */ + if (nv50_disp(encoder->dev)->disp->oclass >= GF110_DISP) { + ret = nv50_mstm_new(nv_encoder, &nv_connector->aux, 16, + nv_connector->base.base.id, + &nv_encoder->dp.mstm); + if (ret) + return ret; + } } else { struct nvkm_i2c_bus *bus = nvkm_i2c_bus_find(i2c, dcbe->i2c_index); @@ -2135,13 +2257,6 @@ nv50_sor_create(struct drm_connector *connector, struct dcb_output *dcbe) nv_encoder->i2c = &bus->i2c; } - encoder = to_drm_encoder(nv_encoder); - encoder->possible_crtcs = dcbe->heads; - encoder->possible_clones = 0; - drm_encoder_init(connector->dev, encoder, &nv50_sor_func, type, NULL); - drm_encoder_helper_add(encoder, &nv50_sor_hfunc); - - drm_mode_connector_attach_encoder(connector, encoder); return 0; } |