[RFC PATCH 10/17] drm/vkms: Allow to change connector status

[José Expósito <jose.exposito89@xxxxxxxxx>]

Store the connector status in vkms_config_connector and use the stored
value to update the connector status in the drm_connector_funcs.detect()
function.

Signed-off-by: José Expósito <jose.exposito89@xxxxxxxxx>
---
 drivers/gpu/drm/vkms/vkms_config.c | 18 ++++++++++++++++--
 drivers/gpu/drm/vkms/vkms_config.h | 12 +++++++++++-
 drivers/gpu/drm/vkms/vkms_output.c | 20 ++++++++++++++++++++
 3 files changed, 47 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/vkms/vkms_config.c b/drivers/gpu/drm/vkms/vkms_config.c
index d95a42a6745a..e8e5c02c9d43 100644
--- a/drivers/gpu/drm/vkms/vkms_config.c
+++ b/drivers/gpu/drm/vkms/vkms_config.c
@@ -3,6 +3,7 @@
 #include <linux/slab.h>
 
 #include <drm/drm_print.h>
+#include <drm/drm_probe_helper.h>
 #include <drm/drm_debugfs.h>
 
 #include "vkms_config.h"
@@ -56,7 +57,7 @@ struct vkms_config *vkms_config_default_create(bool enable_cursor,
 	if (IS_ERR(encoder_cfg))
 		return ERR_CAST(encoder_cfg);
 
-	connector_cfg = vkms_config_add_connector(config, BIT(0));
+	connector_cfg = vkms_config_add_connector(config, BIT(0), connector_status_connected);
 	if (IS_ERR(connector_cfg))
 		return ERR_CAST(connector_cfg);
 
@@ -124,6 +125,8 @@ static int vkms_config_show(struct seq_file *m, void *data)
 	list_for_each_entry(connector_cfg, &vkmsdev->config->connectors, list) {
 		seq_printf(m, "connector(%d).possible_encoders=%d\n", n,
 			   connector_cfg->possible_encoders);
+		seq_printf(m, "connector(%d).status=%d\n", n,
+			   connector_cfg->status);
 		n++;
 	}
 
@@ -229,7 +232,8 @@ void vkms_config_destroy_encoder(struct vkms_config *config,
 }
 
 struct vkms_config_connector *vkms_config_add_connector(struct vkms_config *config,
-							uint32_t possible_encoders)
+							uint32_t possible_encoders,
+							enum drm_connector_status status)
 {
 	struct vkms_config_connector *connector_cfg;
 
@@ -238,6 +242,7 @@ struct vkms_config_connector *vkms_config_add_connector(struct vkms_config *conf
 		return ERR_PTR(-ENOMEM);
 
 	connector_cfg->possible_encoders = possible_encoders;
+	connector_cfg->status = status;
 	list_add_tail(&connector_cfg->list, &config->connectors);
 
 	return connector_cfg;
@@ -249,3 +254,12 @@ void vkms_config_destroy_connector(struct vkms_config *config,
 	list_del(&connector_cfg->list);
 	kfree(connector_cfg);
 }
+
+void vkms_update_connector_status(struct vkms_config *config,
+				  struct vkms_config_connector *connector_cfg,
+				  enum drm_connector_status status)
+{
+	connector_cfg->status = status;
+	if (config->dev)
+		drm_kms_helper_hotplug_event(&config->dev->drm);
+}
diff --git a/drivers/gpu/drm/vkms/vkms_config.h b/drivers/gpu/drm/vkms/vkms_config.h
index 25dab63e7ae7..3237406fa3a3 100644
--- a/drivers/gpu/drm/vkms/vkms_config.h
+++ b/drivers/gpu/drm/vkms/vkms_config.h
@@ -6,6 +6,8 @@
 #include <linux/list.h>
 #include <linux/types.h>
 
+#include <drm/drm_connector.h>
+
 struct vkms_device;
 
 struct vkms_config_plane {
@@ -29,6 +31,9 @@ struct vkms_config_encoder {
 struct vkms_config_connector {
 	struct list_head list;
 	uint32_t possible_encoders;
+	enum drm_connector_status status;
+	/* only set when instantiated */
+	struct drm_connector *connector;
 };
 
 struct vkms_config {
@@ -72,8 +77,13 @@ void vkms_config_destroy_encoder(struct vkms_config *config,
 
 /* Connectors */
 struct vkms_config_connector *vkms_config_add_connector(struct vkms_config *config,
-							uint32_t possible_encoders);
+							uint32_t possible_encoders,
+							enum drm_connector_status status);
 void vkms_config_destroy_connector(struct vkms_config *config,
 				   struct vkms_config_connector *connector_cfg);
 
+void vkms_update_connector_status(struct vkms_config *config,
+				  struct vkms_config_connector *connector_cfg,
+				  enum drm_connector_status status);
+
 #endif /* _VKMS_CONFIG_H_ */
diff --git a/drivers/gpu/drm/vkms/vkms_output.c b/drivers/gpu/drm/vkms/vkms_output.c
index a5b1ab326cdd..511cc2c14c44 100644
--- a/drivers/gpu/drm/vkms/vkms_output.c
+++ b/drivers/gpu/drm/vkms/vkms_output.c
@@ -7,7 +7,25 @@
 #include <drm/drm_managed.h>
 #include <drm/drm_probe_helper.h>
 
+static enum drm_connector_status vkms_connector_detect(struct drm_connector *connector,
+						       bool force)
+{
+	struct vkms_device *vkmsdev = drm_device_to_vkms_device(connector->dev);
+	enum drm_connector_status status = connector->status;
+	struct vkms_config_connector *connector_cfg;
+
+	list_for_each_entry(connector_cfg, &vkmsdev->config->connectors, list) {
+		if (connector_cfg->connector == connector) {
+			status = connector_cfg->status;
+			break;
+		}
+	}
+
+	return status;
+}
+
 static const struct drm_connector_funcs vkms_connector_funcs = {
+	.detect = vkms_connector_detect,
 	.fill_modes = drm_helper_probe_single_connector_modes,
 	.reset = drm_atomic_helper_connector_reset,
 	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
@@ -155,6 +173,8 @@ int vkms_output_init(struct vkms_device *vkmsdev)
 		connector = vkms_connector_init(vkmsdev, connector_cfg->possible_encoders);
 		if (IS_ERR(connector))
 			return PTR_ERR(connector);
+
+		connector_cfg->connector = connector;
 	}
 
 	drm_mode_config_reset(dev);
-- 
2.46.0