Introduce a new boolean variable used to track connector's connect/disconnect status and it is being used on both polling and the HPD (Hot Plug Detect) paths.
A subsequent change would make use of this connector status to propagate per-connector udev hotplug events. The connector status is set in the drm_connector_funcs.fill_modes and cleared out when firing out KMS uevents. Allows user-space to receive the connector's ID, rather than having a generic hot-plug event for all connectors, or in the HPD path, just the first one found with a connection status change. Signed-off-by: Marius Vlad <[email protected]> --- drivers/gpu/drm/drm_connector.c | 1 + drivers/gpu/drm/drm_probe_helper.c | 17 +++++++++++++++++ drivers/gpu/drm/drm_sysfs.c | 1 + include/drm/drm_connector.h | 3 +++ 4 files changed, 22 insertions(+) diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c index 272d6254ea47..3c6628ee3096 100644 --- a/drivers/gpu/drm/drm_connector.c +++ b/drivers/gpu/drm/drm_connector.c @@ -274,6 +274,7 @@ static int drm_connector_init_only(struct drm_device *dev, /* provide ddc symlink in sysfs */ connector->ddc = ddc; + connector->status_changed = false; INIT_LIST_HEAD(&connector->head); INIT_LIST_HEAD(&connector->global_connector_list_entry); diff --git a/drivers/gpu/drm/drm_probe_helper.c b/drivers/gpu/drm/drm_probe_helper.c index 09b12c30df69..f0474368e98d 100644 --- a/drivers/gpu/drm/drm_probe_helper.c +++ b/drivers/gpu/drm/drm_probe_helper.c @@ -629,6 +629,8 @@ int drm_helper_probe_single_connector_modes(struct drm_connector *connector, mod_delayed_work(system_wq, &dev->mode_config.output_poll_work, 0); + + connector->status_changed = true; } /* @@ -732,6 +734,17 @@ EXPORT_SYMBOL(drm_helper_probe_single_connector_modes); */ void drm_kms_helper_hotplug_event(struct drm_device *dev) { + struct drm_connector *connector; + struct drm_connector_list_iter conn_iter; + + mutex_lock(&dev->mode_config.mutex); + drm_connector_list_iter_begin(dev, &conn_iter); + drm_for_each_connector_iter(connector, &conn_iter) { + connector->status_changed = false; + } + drm_connector_list_iter_end(&conn_iter); + mutex_unlock(&dev->mode_config.mutex); + drm_sysfs_hotplug_event(dev); drm_client_dev_hotplug(dev); } @@ -748,6 +761,10 @@ void drm_kms_helper_connector_hotplug_event(struct drm_connector *connector) { struct drm_device *dev = connector->dev; + mutex_lock(&dev->mode_config.mutex); + connector->status_changed = false; + mutex_unlock(&dev->mode_config.mutex); + drm_sysfs_connector_hotplug_event(connector); drm_client_dev_hotplug(dev); } diff --git a/drivers/gpu/drm/drm_sysfs.c b/drivers/gpu/drm/drm_sysfs.c index b01ffa4d6509..bd9161490116 100644 --- a/drivers/gpu/drm/drm_sysfs.c +++ b/drivers/gpu/drm/drm_sysfs.c @@ -199,6 +199,7 @@ static ssize_t status_store(struct device *device, return ret; old_force = connector->force; + connector->status_changed = true; if (sysfs_streq(buf, "detect")) connector->force = 0; diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h index 8f34f4b8183d..e4310df3d55c 100644 --- a/include/drm/drm_connector.h +++ b/include/drm/drm_connector.h @@ -2146,6 +2146,9 @@ struct drm_connector { /** @force: a DRM_FORCE_<foo> state for forced mode sets */ enum drm_connector_force force; + /** @status_changed: if the old status doesn't match current connection status */ + bool status_changed; + /** * @edid_override: Override EDID set via debugfs. * -- 2.47.2
