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drm/i915/mst: use reference counted connectors. (v3)

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Don't just free the connector when we get the destroy callback.

Drop a reference to it, and set it's mst_port to NULL so
no more mst work is done on it.

v2: core mst accepts NULLs fine. Cleanup EDID code properly.
v3: drop the extra reference we were taking.

Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie 2016-03-09 11:14:38 +10:00
parent d2307dea14
commit 0552f7651b
2 changed files with 21 additions and 24 deletions
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43
drivers/gpu/drm/i915/intel_dp_mst.c
View file

@ -109,7 +109,7 @@ static void intel_mst_disable_dp(struct intel_encoder *encoder)
DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, intel_mst->port);
drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, intel_mst->connector->port);
ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
if (ret) {
@ -134,10 +134,11 @@ static void intel_mst_post_disable_dp(struct intel_encoder *encoder)
/* and this can also fail */
drm_dp_update_payload_part2(&intel_dp->mst_mgr);
drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, intel_mst->port);
drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, intel_mst->connector->port);
intel_dp->active_mst_links--;
intel_mst->port = NULL;
intel_mst->connector = NULL;
if (intel_dp->active_mst_links == 0) {
intel_dig_port->base.post_disable(&intel_dig_port->base);
intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
@ -177,7 +178,8 @@ static void intel_mst_pre_enable_dp(struct intel_encoder *encoder)
found->encoder = encoder;
DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
intel_mst->port = found->port;
intel_mst->connector = found;
if (intel_dp->active_mst_links == 0) {
intel_prepare_ddi_buffer(&intel_dig_port->base);
@ -195,7 +197,7 @@ static void intel_mst_pre_enable_dp(struct intel_encoder *encoder)
}
ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr,
intel_mst->port,
intel_mst->connector->port,
intel_crtc->config->pbn, &slots);
if (ret == false) {
DRM_ERROR("failed to allocate vcpi\n");
@ -244,7 +246,7 @@ static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
{
struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
*pipe = intel_mst->pipe;
if (intel_mst->port)
if (intel_mst->connector)
return true;
return false;
}
@ -308,10 +310,11 @@ static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
struct edid *edid;
int ret;
edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
if (!edid)
return 0;
if (!intel_dp) {
return intel_connector_update_modes(connector, NULL);
}
edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
ret = intel_connector_update_modes(connector, edid);
kfree(edid);
@ -324,6 +327,8 @@ intel_dp_mst_detect(struct drm_connector *connector, bool force)
struct intel_connector *intel_connector = to_intel_connector(connector);
struct intel_dp *intel_dp = intel_connector->mst_port;
if (!intel_dp)
return connector_status_disconnected;
return drm_dp_mst_detect_port(connector, &intel_dp->mst_mgr, intel_connector->port);
}
@ -389,6 +394,8 @@ static struct drm_encoder *intel_mst_atomic_best_encoder(struct drm_connector *c
struct intel_dp *intel_dp = intel_connector->mst_port;
struct intel_crtc *crtc = to_intel_crtc(state->crtc);
if (!intel_dp)
return NULL;
return &intel_dp->mst_encoders[crtc->pipe]->base.base;
}
@ -396,6 +403,8 @@ static struct drm_encoder *intel_mst_best_encoder(struct drm_connector *connecto
{
struct intel_connector *intel_connector = to_intel_connector(connector);
struct intel_dp *intel_dp = intel_connector->mst_port;
if (!intel_dp)
return NULL;
return &intel_dp->mst_encoders[0]->base.base;
}
@ -506,23 +515,11 @@ static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
/* need to nuke the connector */
drm_modeset_lock_all(dev);
if (connector->state->crtc) {
struct drm_mode_set set;
int ret;
memset(&set, 0, sizeof(set));
set.crtc = connector->state->crtc,
ret = drm_atomic_helper_set_config(&set);
WARN(ret, "Disabling mst crtc failed with %i\n", ret);
}
intel_connector_remove_from_fbdev(intel_connector);
drm_connector_cleanup(connector);
intel_connector->mst_port = NULL;
drm_modeset_unlock_all(dev);
kfree(intel_connector);
drm_connector_unreference(&intel_connector->base);
DRM_DEBUG_KMS("\n");
}

2
drivers/gpu/drm/i915/intel_drv.h
View file

@ -883,7 +883,7 @@ struct intel_dp_mst_encoder {
struct intel_encoder base;
enum pipe pipe;
struct intel_digital_port *primary;
void *port; /* store this opaque as its illegal to dereference it */
struct intel_connector *connector;
};
static inline enum dpio_channel