Le 07/04/2025 à 10:14, José Expósito a écrit :
When a connector is created, add a `status` file to allow to update the
connector status to:
- 1 connector_status_connected
- 2 connector_status_disconnected
- 3 connector_status_unknown
If the device is enabled, updating the status hot-plug or unplugs the
connector.
Reviewed-by: Louis Chauvet <[email protected]>
Signed-off-by: José Expósito <[email protected]>
---
Documentation/gpu/vkms.rst | 5 +++
drivers/gpu/drm/vkms/vkms_configfs.c | 48 +++++++++++++++++++++++++++
drivers/gpu/drm/vkms/vkms_connector.c | 7 ++++
drivers/gpu/drm/vkms/vkms_connector.h | 6 ++++
4 files changed, 66 insertions(+)
diff --git a/Documentation/gpu/vkms.rst b/Documentation/gpu/vkms.rst
index c551241fe873..7c54099b1dc6 100644
--- a/Documentation/gpu/vkms.rst
+++ b/Documentation/gpu/vkms.rst
@@ -108,6 +108,11 @@ Last but not least, create one or more connectors::
sudo mkdir /config/vkms/my-vkms/connectors/connector0
+Connectors have 1 configurable attribute:
+
+- status: Connection status: 1 connected, 2 disconnected, 3 unknown (same
values
+ as those exposed by the "status" property of a connector)
+
To finish the configuration, link the different pipeline items::
sudo ln -s /config/vkms/my-vkms/crtcs/crtc0 /config/vkms/my-vkms/planes/plane0/possible_crtcs
diff --git a/drivers/gpu/drm/vkms/vkms_configfs.c
b/drivers/gpu/drm/vkms/vkms_configfs.c
index 8e90acbebd6a..07ab794e1052 100644
--- a/drivers/gpu/drm/vkms/vkms_configfs.c
+++ b/drivers/gpu/drm/vkms/vkms_configfs.c
@@ -7,6 +7,7 @@
#include "vkms_drv.h"
#include "vkms_config.h"
#include "vkms_configfs.h"
+#include "vkms_connector.h"
/* To avoid registering configfs more than once or unregistering on error */
static bool is_configfs_registered;
@@ -512,6 +513,52 @@ static const struct config_item_type encoder_group_type = {
.ct_owner = THIS_MODULE,
};
+static ssize_t connector_status_show(struct config_item *item, char *page)
+{
+ struct vkms_configfs_connector *connector;
+ enum drm_connector_status status;
+
+ connector = connector_item_to_vkms_configfs_connector(item);
+
+ scoped_guard(mutex, &connector->dev->lock)
+ status = vkms_config_connector_get_status(connector->config);
+
+ return sprintf(page, "%u", status);
+}
+
+static ssize_t connector_status_store(struct config_item *item,
+ const char *page, size_t count)
+{
+ struct vkms_configfs_connector *connector;
+ enum drm_connector_status status;
+
+ connector = connector_item_to_vkms_configfs_connector(item);
+
+ if (kstrtouint(page, 10, &status))
+ return -EINVAL;
+
+ if (status != connector_status_connected &&
+ status != connector_status_disconnected &&
+ status != connector_status_unknown)
+ return -EINVAL;
+
+ scoped_guard(mutex, &connector->dev->lock) {
+ vkms_config_connector_set_status(connector->config, status);
+
+ if (connector->dev->enabled)
+
vkms_trigger_connector_hotplug(connector->dev->config->dev);
+ }
+
+ return (ssize_t)count;
+}
+
+CONFIGFS_ATTR(connector_, status);
+
+static struct configfs_attribute *connector_item_attrs[] = {
+ &connector_attr_status,
+ NULL,
+};
+
static void connector_release(struct config_item *item)
{
struct vkms_configfs_connector *connector;
@@ -531,6 +578,7 @@ static struct configfs_item_operations
connector_item_operations = {
};
static const struct config_item_type connector_item_type = {
+ .ct_attrs = connector_item_attrs,
.ct_item_ops = &connector_item_operations,
.ct_owner = THIS_MODULE,
};
diff --git a/drivers/gpu/drm/vkms/vkms_connector.c
b/drivers/gpu/drm/vkms/vkms_connector.c
index 89fa8d9d739b..b0a6b212d3f4 100644
--- a/drivers/gpu/drm/vkms/vkms_connector.c
+++ b/drivers/gpu/drm/vkms/vkms_connector.c
@@ -87,3 +87,10 @@ struct vkms_connector *vkms_connector_init(struct
vkms_device *vkmsdev)
return connector;
}
+
+void vkms_trigger_connector_hotplug(struct vkms_device *vkmsdev)
+{
+ struct drm_device *dev = &vkmsdev->drm;
+
+ drm_kms_helper_hotplug_event(dev);
+}
diff --git a/drivers/gpu/drm/vkms/vkms_connector.h
b/drivers/gpu/drm/vkms/vkms_connector.h
index 90f835f70b3b..35f2adf97e32 100644
--- a/drivers/gpu/drm/vkms/vkms_connector.h
+++ b/drivers/gpu/drm/vkms/vkms_connector.h
@@ -26,4 +26,10 @@ struct vkms_connector {
*/
struct vkms_connector *vkms_connector_init(struct vkms_device *vkmsdev);
+/**
+ * struct vkms_device *vkmsdev() - Update the device's connectors status
+ * @vkmsdev: VKMS device to update
+ */
+void vkms_trigger_connector_hotplug(struct vkms_device *vkmsdev);
+
#endif /* _VKMS_CONNECTOR_H_ */
--
Louis Chauvet, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
