1 // SPDX-License-Identifier: GPL-2.0+ 2 3 #include <drm/drm_atomic_helper.h> 4 #include <drm/drm_edid.h> 5 #include <drm/drm_managed.h> 6 #include <drm/drm_probe_helper.h> 7 8 #include "vkms_config.h" 9 #include "vkms_connector.h" 10 11 static enum drm_connector_status vkms_connector_detect(struct drm_connector *connector, 12 bool force) 13 { 14 struct drm_device *dev = connector->dev; 15 struct vkms_device *vkmsdev = drm_device_to_vkms_device(dev); 16 struct vkms_connector *vkms_connector; 17 enum drm_connector_status status; 18 struct vkms_config_connector *connector_cfg; 19 20 vkms_connector = drm_connector_to_vkms_connector(connector); 21 22 /* 23 * The connector configuration might not exist if its configfs directory 24 * was deleted. Therefore, use the configuration if present or keep the 25 * current status if we can not access it anymore. 26 */ 27 status = connector->status; 28 29 vkms_config_for_each_connector(vkmsdev->config, connector_cfg) { 30 if (connector_cfg->connector == vkms_connector) 31 status = vkms_config_connector_get_status(connector_cfg); 32 } 33 34 return status; 35 } 36 37 static const struct drm_connector_funcs vkms_connector_funcs = { 38 .detect = vkms_connector_detect, 39 .fill_modes = drm_helper_probe_single_connector_modes, 40 .reset = drm_atomic_helper_connector_reset, 41 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 42 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 43 }; 44 45 static int vkms_conn_get_modes(struct drm_connector *connector) 46 { 47 int count; 48 49 /* Use the default modes list from DRM */ 50 count = drm_add_modes_noedid(connector, XRES_MAX, YRES_MAX); 51 drm_set_preferred_mode(connector, XRES_DEF, YRES_DEF); 52 53 return count; 54 } 55 56 static struct drm_encoder *vkms_conn_best_encoder(struct drm_connector *connector) 57 { 58 struct drm_encoder *encoder; 59 60 drm_connector_for_each_possible_encoder(connector, encoder) 61 return encoder; 62 63 return NULL; 64 } 65 66 static const struct drm_connector_helper_funcs vkms_conn_helper_funcs = { 67 .get_modes = vkms_conn_get_modes, 68 .best_encoder = vkms_conn_best_encoder, 69 }; 70 71 struct vkms_connector *vkms_connector_init(struct vkms_device *vkmsdev) 72 { 73 struct drm_device *dev = &vkmsdev->drm; 74 struct vkms_connector *connector; 75 int ret; 76 77 connector = drmm_kzalloc(dev, sizeof(*connector), GFP_KERNEL); 78 if (!connector) 79 return ERR_PTR(-ENOMEM); 80 81 ret = drmm_connector_init(dev, &connector->base, &vkms_connector_funcs, 82 DRM_MODE_CONNECTOR_VIRTUAL, NULL); 83 if (ret) 84 return ERR_PTR(ret); 85 86 drm_connector_helper_add(&connector->base, &vkms_conn_helper_funcs); 87 88 return connector; 89 } 90 91 void vkms_trigger_connector_hotplug(struct vkms_device *vkmsdev) 92 { 93 struct drm_device *dev = &vkmsdev->drm; 94 95 drm_kms_helper_hotplug_event(dev); 96 } 97