diff options
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 73 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_irq.c | 17 |
2 files changed, 88 insertions, 2 deletions
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index 3bd404b727b6..d18d72a520f2 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -3853,7 +3853,9 @@ void amdgpu_dm_update_connector_after_detect( drm_dbg_kms(dev, "DCHPD: connector_id=%d: Old sink=%p New sink=%p\n", aconnector->connector_id, aconnector->dc_sink, sink); - guard(mutex)(&dev->mode_config.mutex); + /* When polling, DRM has already locked the mutex for us. */ + if (!drm_kms_helper_is_poll_worker()) + mutex_lock(&dev->mode_config.mutex); /* * 1. Update status of the drm connector @@ -3916,6 +3918,10 @@ void amdgpu_dm_update_connector_after_detect( } update_subconnector_property(aconnector); + + /* When polling, the mutex will be unlocked for us by DRM. */ + if (!drm_kms_helper_is_poll_worker()) + mutex_unlock(&dev->mode_config.mutex); } static void handle_hpd_irq_helper(struct amdgpu_dm_connector *aconnector) @@ -7227,11 +7233,62 @@ finish: } /** + * amdgpu_dm_connector_poll() - Poll a connector to see if it's connected to a display + * + * Used for connectors that don't support HPD (hotplug detection) + * to periodically checked whether the connector is connected to a display. + */ +static enum drm_connector_status +amdgpu_dm_connector_poll(struct amdgpu_dm_connector *aconnector, bool force) +{ + struct drm_connector *connector = &aconnector->base; + struct drm_device *dev = connector->dev; + struct amdgpu_device *adev = drm_to_adev(dev); + struct dc_link *link = aconnector->dc_link; + enum dc_connection_type conn_type = dc_connection_none; + enum drm_connector_status status = connector_status_disconnected; + + mutex_lock(&aconnector->hpd_lock); + + if (dc_link_detect_connection_type(aconnector->dc_link, &conn_type) && + conn_type != dc_connection_none) { + mutex_lock(&adev->dm.dc_lock); + + /* Only call full link detection when a sink isn't created yet, + * ie. just when the display is plugged in, otherwise we risk flickering. + */ + if (link->local_sink || + dc_link_detect(link, DETECT_REASON_HPD)) + status = connector_status_connected; + + mutex_unlock(&adev->dm.dc_lock); + } + + if (connector->status != status) { + if (status == connector_status_disconnected) { + if (link->local_sink) + dc_sink_release(link->local_sink); + + link->local_sink = NULL; + link->dpcd_sink_count = 0; + link->type = dc_connection_none; + } + + amdgpu_dm_update_connector_after_detect(aconnector); + } + + mutex_unlock(&aconnector->hpd_lock); + return status; +} + +/** * amdgpu_dm_connector_detect() - Detect whether a DRM connector is connected to a display * * A connector is considered connected when it has a sink that is not NULL. * For connectors that support HPD (hotplug detection), the connection is * handled in the HPD interrupt. + * For connectors that may not support HPD, such as analog connectors, + * DRM will call this function repeatedly to poll them. * * Notes: * 1. This interface is NOT called in context of HPD irq. @@ -7251,6 +7308,14 @@ amdgpu_dm_connector_detect(struct drm_connector *connector, bool force) else if (aconnector->base.force == DRM_FORCE_OFF) return connector_status_disconnected; + /* Poll analog connectors and only when either + * disconnected or connected to an analog display. + */ + if (drm_kms_helper_is_poll_worker() && + dc_connector_supports_analog(aconnector->dc_link->link_id.id) && + (!aconnector->dc_sink || aconnector->dc_sink->edid_caps.analog)) + return amdgpu_dm_connector_poll(aconnector, force); + return (aconnector->dc_sink ? connector_status_connected : connector_status_disconnected); } @@ -8675,9 +8740,13 @@ void amdgpu_dm_connector_init_helper(struct amdgpu_display_manager *dm, link->link_enc->features.dp_ycbcr420_supported ? true : false; break; case DRM_MODE_CONNECTOR_DVID: - case DRM_MODE_CONNECTOR_DVII: aconnector->base.polled = DRM_CONNECTOR_POLL_HPD; break; + case DRM_MODE_CONNECTOR_DVII: + case DRM_MODE_CONNECTOR_VGA: + aconnector->base.polled = + DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT; + break; default: break; } diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_irq.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_irq.c index a1c722112c22..0a2a3f233a0e 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_irq.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_irq.c @@ -476,6 +476,7 @@ void amdgpu_dm_irq_fini(struct amdgpu_device *adev) void amdgpu_dm_irq_suspend(struct amdgpu_device *adev) { + struct drm_device *dev = adev_to_drm(adev); int src; struct list_head *hnd_list_h; struct list_head *hnd_list_l; @@ -512,6 +513,9 @@ void amdgpu_dm_irq_suspend(struct amdgpu_device *adev) } DM_IRQ_TABLE_UNLOCK(adev, irq_table_flags); + + if (dev->mode_config.poll_enabled) + drm_kms_helper_poll_disable(dev); } void amdgpu_dm_irq_resume_early(struct amdgpu_device *adev) @@ -537,6 +541,7 @@ void amdgpu_dm_irq_resume_early(struct amdgpu_device *adev) void amdgpu_dm_irq_resume_late(struct amdgpu_device *adev) { + struct drm_device *dev = adev_to_drm(adev); int src; struct list_head *hnd_list_h, *hnd_list_l; unsigned long irq_table_flags; @@ -557,6 +562,9 @@ void amdgpu_dm_irq_resume_late(struct amdgpu_device *adev) } DM_IRQ_TABLE_UNLOCK(adev, irq_table_flags); + + if (dev->mode_config.poll_enabled) + drm_kms_helper_poll_enable(dev); } /* @@ -893,6 +901,7 @@ void amdgpu_dm_hpd_init(struct amdgpu_device *adev) struct drm_connector_list_iter iter; int irq_type; int i; + bool use_polling = false; /* First, clear all hpd and hpdrx interrupts */ for (i = DC_IRQ_SOURCE_HPD1; i <= DC_IRQ_SOURCE_HPD6RX; i++) { @@ -906,6 +915,8 @@ void amdgpu_dm_hpd_init(struct amdgpu_device *adev) struct amdgpu_dm_connector *amdgpu_dm_connector; const struct dc_link *dc_link; + use_polling |= connector->polled != DRM_CONNECTOR_POLL_HPD; + if (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK) continue; @@ -947,6 +958,9 @@ void amdgpu_dm_hpd_init(struct amdgpu_device *adev) } } drm_connector_list_iter_end(&iter); + + if (use_polling) + drm_kms_helper_poll_init(dev); } /** @@ -997,4 +1011,7 @@ void amdgpu_dm_hpd_fini(struct amdgpu_device *adev) } } drm_connector_list_iter_end(&iter); + + if (dev->mode_config.poll_enabled) + drm_kms_helper_poll_fini(dev); } |