tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
11static 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
37static 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
45static 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
56static 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
66static 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
71struct 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
91void 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}