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_connector.h"
9
10 static const struct drm_connector_funcs vkms_connector_funcs = {
11 .fill_modes = drm_helper_probe_single_connector_modes,
12 .reset = drm_atomic_helper_connector_reset,
13 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
14 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
15 };
16
vkms_conn_get_modes(struct drm_connector * connector)17 static int vkms_conn_get_modes(struct drm_connector *connector)
18 {
19 int count;
20
21 /* Use the default modes list from DRM */
22 count = drm_add_modes_noedid(connector, XRES_MAX, YRES_MAX);
23 drm_set_preferred_mode(connector, XRES_DEF, YRES_DEF);
24
25 return count;
26 }
27
vkms_conn_best_encoder(struct drm_connector * connector)28 static struct drm_encoder *vkms_conn_best_encoder(struct drm_connector *connector)
29 {
30 struct drm_encoder *encoder;
31
32 drm_connector_for_each_possible_encoder(connector, encoder)
33 return encoder;
34
35 return NULL;
36 }
37
38 static const struct drm_connector_helper_funcs vkms_conn_helper_funcs = {
39 .get_modes = vkms_conn_get_modes,
40 .best_encoder = vkms_conn_best_encoder,
41 };
42
vkms_connector_init(struct vkms_device * vkmsdev)43 struct vkms_connector *vkms_connector_init(struct vkms_device *vkmsdev)
44 {
45 struct drm_device *dev = &vkmsdev->drm;
46 struct vkms_connector *connector;
47 int ret;
48
49 connector = drmm_kzalloc(dev, sizeof(*connector), GFP_KERNEL);
50 if (!connector)
51 return ERR_PTR(-ENOMEM);
52
53 ret = drmm_connector_init(dev, &connector->base, &vkms_connector_funcs,
54 DRM_MODE_CONNECTOR_VIRTUAL, NULL);
55 if (ret)
56 return ERR_PTR(ret);
57
58 drm_connector_helper_add(&connector->base, &vkms_conn_helper_funcs);
59
60 return connector;
61 }
62