diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nouveau_dp.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_dp.c | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_dp.c b/drivers/gpu/drm/nouveau/nouveau_dp.c index 87d52d36f4fc..0d052e1660f8 100644 --- a/drivers/gpu/drm/nouveau/nouveau_dp.c +++ b/drivers/gpu/drm/nouveau/nouveau_dp.c @@ -30,6 +30,13 @@ #include "nouveau_encoder.h" #include "nouveau_crtc.h" +#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) { @@ -55,14 +62,14 @@ nouveau_dp_detect(struct nouveau_encoder *nv_encoder) struct drm_device *dev = nv_encoder->base.base.dev; struct nouveau_drm *drm = nouveau_drm(dev); struct nvkm_i2c_aux *aux; - u8 *dpcd = nv_encoder->dp.dpcd; + u8 dpcd[8]; int ret; aux = nv_encoder->aux; if (!aux) return -ENODEV; - ret = nvkm_rdaux(aux, DP_DPCD_REV, dpcd, 8); + ret = nvkm_rdaux(aux, DP_DPCD_REV, dpcd, sizeof(dpcd)); if (ret) return ret; @@ -84,5 +91,11 @@ nouveau_dp_detect(struct nouveau_encoder *nv_encoder) nv_encoder->dp.link_nr, nv_encoder->dp.link_bw); nouveau_dp_probe_oui(dev, aux, dpcd); - return 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; } |