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drm/nouveau: Stop unsetting mstc->port, use malloc refs

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Same as we did for i915, but for nouveau this time. Additionally, we
grab a malloc reference to the port that lasts for the entire lifetime
of nv50_mstc, which gives us the guarantee that mstc->port will always
point to valid memory for as long as the mstc stays around.

Signed-off-by: Lyude Paul <lyude@redhat.com>
Reviewed-by: Ben Skeggs <bskeggs@redhat.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: David Airlie <airlied@redhat.com>
Cc: Jerry Zuo <Jerry.Zuo@amd.com>
Cc: Harry Wentland <harry.wentland@amd.com>
Cc: Juston Li <juston.li@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190111005343.17443-16-lyude@redhat.com
This commit is contained in:
Lyude Paul 2019-01-10 19:53:38 -05:00
parent 81640f01c2
commit d79a3c52f3
1 changed files with 5 additions and 13 deletions
Download patch file Download diff file Expand all files Collapse all files

18
drivers/gpu/drm/nouveau/dispnv50/disp.c
View file

@ -701,8 +701,7 @@ nv50_msto_cleanup(struct nv50_msto *msto)
NV_ATOMIC(drm, "%s: msto cleanup\n", msto->encoder.name); NV_ATOMIC(drm, "%s: msto cleanup\n", msto->encoder.name);
if (mstc->port) drm_dp_mst_deallocate_vcpi(&mstm->mgr, mstc->port);
drm_dp_mst_deallocate_vcpi(&mstm->mgr, mstc->port);
msto->mstc = NULL; msto->mstc = NULL;
msto->head = NULL; msto->head = NULL;
@ -727,7 +726,7 @@ nv50_msto_prepare(struct nv50_msto *msto)
}; };
NV_ATOMIC(drm, "%s: msto prepare\n", msto->encoder.name); NV_ATOMIC(drm, "%s: msto prepare\n", msto->encoder.name);
if (mstc->port && mstc->port->vcpi.vcpi > 0) { if (mstc->port->vcpi.vcpi > 0) {
struct drm_dp_payload *payload = nv50_msto_payload(msto); struct drm_dp_payload *payload = nv50_msto_payload(msto);
if (payload) { if (payload) {
args.vcpi.start_slot = payload->start_slot; args.vcpi.start_slot = payload->start_slot;
@ -824,8 +823,7 @@ nv50_msto_disable(struct drm_encoder *encoder)
struct nv50_mstc *mstc = msto->mstc; struct nv50_mstc *mstc = msto->mstc;
struct nv50_mstm *mstm = mstc->mstm; struct nv50_mstm *mstm = mstc->mstm;
if (mstc->port) drm_dp_mst_reset_vcpi_slots(&mstm->mgr, 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->outp->update(mstm->outp, msto->head->base.index, NULL, 0, 0);
mstm->modified = true; mstm->modified = true;
@ -937,7 +935,7 @@ nv50_mstc_detect(struct drm_connector *connector, bool force)
enum drm_connector_status conn_status; enum drm_connector_status conn_status;
int ret; int ret;
if (!mstc->port) if (drm_connector_is_unregistered(connector))
return connector_status_disconnected; return connector_status_disconnected;
ret = pm_runtime_get_sync(connector->dev->dev); ret = pm_runtime_get_sync(connector->dev->dev);
@ -958,8 +956,7 @@ nv50_mstc_destroy(struct drm_connector *connector)
struct nv50_mstc *mstc = nv50_mstc(connector); struct nv50_mstc *mstc = nv50_mstc(connector);
drm_connector_cleanup(&mstc->connector); drm_connector_cleanup(&mstc->connector);
if (mstc->port) drm_dp_mst_put_port_malloc(mstc->port);
drm_dp_mst_put_port_malloc(mstc->port);
kfree(mstc); kfree(mstc);
} }
@ -1073,11 +1070,6 @@ nv50_mstm_destroy_connector(struct drm_dp_mst_topology_mgr *mgr,
drm_fb_helper_remove_one_connector(&drm->fbcon->helper, &mstc->connector); drm_fb_helper_remove_one_connector(&drm->fbcon->helper, &mstc->connector);
drm_modeset_lock(&drm->dev->mode_config.connection_mutex, NULL);
drm_dp_mst_put_port_malloc(mstc->port);
mstc->port = NULL;
drm_modeset_unlock(&drm->dev->mode_config.connection_mutex);
drm_connector_put(&mstc->connector); drm_connector_put(&mstc->connector);
} }