[RFC PATCH 08/17] drm/vkms: Allow to configure multiple connectors

["José Expósito" <jose.exposito89@gmail.com>]

Add a list of connector configurations to vkms_config and add as many
connector as configured during output initialization.

For backwards compatibility, create a single connector in the default
configuration.

Signed-off-by: José Expósito <jose.exposito89@gmail.com>
---
 drivers/gpu/drm/vkms/vkms_config.c | 40 ++++++++++++++++++++++++++++++
 drivers/gpu/drm/vkms/vkms_config.h | 12 +++++++++
 drivers/gpu/drm/vkms/vkms_output.c | 11 +++++---
 3 files changed, 59 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/vkms/vkms_config.c b/drivers/gpu/drm/vkms/vkms_config.c
index 6a8dfebee24e..a456f9db3c66 100644
--- a/drivers/gpu/drm/vkms/vkms_config.c
+++ b/drivers/gpu/drm/vkms/vkms_config.c
@@ -19,6 +19,7 @@ struct vkms_config *vkms_config_create(char *dev_name)
 	config->dev_name = dev_name;
 	config->crtcs = (struct list_head)LIST_HEAD_INIT(config->crtcs);
 	config->encoders = (struct list_head)LIST_HEAD_INIT(config->encoders);
+	config->connectors = (struct list_head)LIST_HEAD_INIT(config->connectors);
 
 	return config;
 }
@@ -30,6 +31,7 @@ struct vkms_config *vkms_config_default_create(bool enable_cursor,
 	struct vkms_config *config;
 	struct vkms_config_crtc *crtc_cfg;
 	struct vkms_config_encoder *encoder_cfg;
+	struct vkms_config_connector *connector_cfg;
 
 	config = vkms_config_create(DEFAULT_DEVICE_NAME);
 	if (IS_ERR(config))
@@ -46,6 +48,10 @@ 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));
+	if (IS_ERR(connector_cfg))
+		return ERR_CAST(connector_cfg);
+
 	return config;
 }
 
@@ -53,6 +59,7 @@ void vkms_config_destroy(struct vkms_config *config)
 {
 	struct vkms_config_crtc *crtc_cfg, *crtc_tmp;
 	struct vkms_config_encoder *encoder_cfg, *encoder_tmp;
+	struct vkms_config_connector *connector_cfg, *connector_tmp;
 
 	list_for_each_entry_safe(crtc_cfg, crtc_tmp, &config->crtcs, list)
 		vkms_config_destroy_crtc(config, crtc_cfg);
@@ -60,6 +67,9 @@ void vkms_config_destroy(struct vkms_config *config)
 	list_for_each_entry_safe(encoder_cfg, encoder_tmp, &config->encoders, list)
 		vkms_config_destroy_encoder(config, encoder_cfg);
 
+	list_for_each_entry_safe(connector_cfg, connector_tmp, &config->connectors, list)
+		vkms_config_destroy_connector(config, connector_cfg);
+
 	kfree(config);
 }
 
@@ -70,6 +80,7 @@ static int vkms_config_show(struct seq_file *m, void *data)
 	struct vkms_device *vkmsdev = drm_device_to_vkms_device(dev);
 	struct vkms_config_crtc *crtc_cfg;
 	struct vkms_config_encoder *encoder_cfg;
+	struct vkms_config_connector *connector_cfg;
 	int n;
 
 	seq_printf(m, "dev_name=%s\n", vkmsdev->config->dev_name);
@@ -90,6 +101,13 @@ static int vkms_config_show(struct seq_file *m, void *data)
 		n++;
 	}
 
+	n = 0;
+	list_for_each_entry(connector_cfg, &vkmsdev->config->connectors, list) {
+		seq_printf(m, "connector(%d).possible_encoders=%d\n", n,
+			   connector_cfg->possible_encoders);
+		n++;
+	}
+
 	return 0;
 }
 
@@ -166,3 +184,25 @@ void vkms_config_destroy_encoder(struct vkms_config *config,
 	list_del(&encoder_cfg->list);
 	kfree(encoder_cfg);
 }
+
+struct vkms_config_connector *vkms_config_add_connector(struct vkms_config *config,
+							uint32_t possible_encoders)
+{
+	struct vkms_config_connector *connector_cfg;
+
+	connector_cfg = kzalloc(sizeof(*connector_cfg), GFP_KERNEL);
+	if (!connector_cfg)
+		return ERR_PTR(-ENOMEM);
+
+	connector_cfg->possible_encoders = possible_encoders;
+	list_add_tail(&connector_cfg->list, &config->connectors);
+
+	return connector_cfg;
+}
+
+void vkms_config_destroy_connector(struct vkms_config *config,
+				   struct vkms_config_connector *connector_cfg)
+{
+	list_del(&connector_cfg->list);
+	kfree(connector_cfg);
+}
diff --git a/drivers/gpu/drm/vkms/vkms_config.h b/drivers/gpu/drm/vkms/vkms_config.h
index b717b5c0d3d9..f1dd59fc6300 100644
--- a/drivers/gpu/drm/vkms/vkms_config.h
+++ b/drivers/gpu/drm/vkms/vkms_config.h
@@ -20,12 +20,18 @@ struct vkms_config_encoder {
 	uint32_t possible_crtcs;
 };
 
+struct vkms_config_connector {
+	struct list_head list;
+	uint32_t possible_encoders;
+};
+
 struct vkms_config {
 	char *dev_name;
 	bool cursor;
 	bool overlay;
 	struct list_head crtcs;
 	struct list_head encoders;
+	struct list_head connectors;
 	/* only set when instantiated */
 	struct vkms_device *dev;
 };
@@ -52,4 +58,10 @@ struct vkms_config_encoder *vkms_config_add_encoder(struct vkms_config *config,
 void vkms_config_destroy_encoder(struct vkms_config *config,
 				 struct vkms_config_encoder *encoder_cfg);
 
+/* Connectors */
+struct vkms_config_connector *vkms_config_add_connector(struct vkms_config *config,
+							uint32_t possible_encoders);
+void vkms_config_destroy_connector(struct vkms_config *config,
+				   struct vkms_config_connector *connector_cfg);
+
 #endif /* _VKMS_CONFIG_H_ */
diff --git a/drivers/gpu/drm/vkms/vkms_output.c b/drivers/gpu/drm/vkms/vkms_output.c
index 4413cf88afc7..021a491de817 100644
--- a/drivers/gpu/drm/vkms/vkms_output.c
+++ b/drivers/gpu/drm/vkms/vkms_output.c
@@ -100,6 +100,7 @@ int vkms_output_init(struct vkms_device *vkmsdev, int index)
 {
 	struct drm_device *dev = &vkmsdev->drm;
 	struct drm_connector *connector;
+	struct vkms_config_connector *connector_cfg;
 	struct drm_encoder *encoder;
 	struct vkms_config_encoder *encoder_cfg;
 	struct vkms_crtc *vkms_crtc;
@@ -142,10 +143,6 @@ int vkms_output_init(struct vkms_device *vkmsdev, int index)
 		}
 	}
 
-	connector = vkms_connector_init(vkmsdev, BIT(index));
-	if (IS_ERR(connector))
-		return PTR_ERR(connector);
-
 	list_for_each_entry(encoder_cfg, &vkmsdev->config->encoders, list) {
 		encoder = vkms_encoder_init(vkmsdev, encoder_cfg->possible_crtcs,
 					    encoder_cfg->index);
@@ -153,6 +150,12 @@ int vkms_output_init(struct vkms_device *vkmsdev, int index)
 			return PTR_ERR(encoder);
 	}
 
+	list_for_each_entry(connector_cfg, &vkmsdev->config->connectors, list) {
+		connector = vkms_connector_init(vkmsdev, connector_cfg->possible_encoders);
+		if (IS_ERR(connector))
+			return PTR_ERR(connector);
+	}
+
 	drm_mode_config_reset(dev);
 
 	return 0;
-- 
2.46.0