1 // SPDX-License-Identifier: GPL-2.0+
2
3 #include "vkms_drv.h"
4 #include <drm/drm_atomic_helper.h>
5 #include <drm/drm_edid.h>
6 #include <drm/drm_managed.h>
7 #include <drm/drm_probe_helper.h>
8
9 static const struct drm_connector_funcs vkms_connector_funcs = {
10 .fill_modes = drm_helper_probe_single_connector_modes,
11 .reset = drm_atomic_helper_connector_reset,
12 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
13 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
14 };
15
vkms_conn_get_modes(struct drm_connector * connector)16 static int vkms_conn_get_modes(struct drm_connector *connector)
17 {
18 int count;
19
20 /* Use the default modes list from DRM */
21 count = drm_add_modes_noedid(connector, XRES_MAX, YRES_MAX);
22 drm_set_preferred_mode(connector, XRES_DEF, YRES_DEF);
23
24 return count;
25 }
26
27 static const struct drm_connector_helper_funcs vkms_conn_helper_funcs = {
28 .get_modes = vkms_conn_get_modes,
29 };
30
vkms_output_init(struct vkms_device * vkmsdev)31 int vkms_output_init(struct vkms_device *vkmsdev)
32 {
33 struct drm_device *dev = &vkmsdev->drm;
34 struct drm_connector *connector;
35 struct drm_encoder *encoder;
36 struct vkms_output *output;
37 struct vkms_plane *primary, *overlay, *cursor = NULL;
38 int ret;
39 int writeback;
40 unsigned int n;
41
42 /*
43 * Initialize used plane. One primary plane is required to perform the composition.
44 *
45 * The overlay and cursor planes are not mandatory, but can be used to perform complex
46 * composition.
47 */
48 primary = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_PRIMARY);
49 if (IS_ERR(primary))
50 return PTR_ERR(primary);
51
52 if (vkmsdev->config->cursor) {
53 cursor = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_CURSOR);
54 if (IS_ERR(cursor))
55 return PTR_ERR(cursor);
56 }
57
58 output = vkms_crtc_init(dev, &primary->base,
59 cursor ? &cursor->base : NULL);
60 if (IS_ERR(output)) {
61 DRM_ERROR("Failed to allocate CRTC\n");
62 return PTR_ERR(output);
63 }
64
65 if (vkmsdev->config->overlay) {
66 for (n = 0; n < NUM_OVERLAY_PLANES; n++) {
67 overlay = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_OVERLAY);
68 if (IS_ERR(overlay)) {
69 DRM_DEV_ERROR(dev->dev, "Failed to init vkms plane\n");
70 return PTR_ERR(overlay);
71 }
72 overlay->base.possible_crtcs = drm_crtc_mask(&output->crtc);
73 }
74 }
75
76 connector = drmm_kzalloc(dev, sizeof(*connector), GFP_KERNEL);
77 if (!connector) {
78 DRM_ERROR("Failed to allocate connector\n");
79 return -ENOMEM;
80 }
81
82 ret = drmm_connector_init(dev, connector, &vkms_connector_funcs,
83 DRM_MODE_CONNECTOR_VIRTUAL, NULL);
84 if (ret) {
85 DRM_ERROR("Failed to init connector\n");
86 return ret;
87 }
88
89 drm_connector_helper_add(connector, &vkms_conn_helper_funcs);
90
91 encoder = drmm_kzalloc(dev, sizeof(*encoder), GFP_KERNEL);
92 if (!encoder) {
93 DRM_ERROR("Failed to allocate encoder\n");
94 return -ENOMEM;
95 }
96 ret = drmm_encoder_init(dev, encoder, NULL,
97 DRM_MODE_ENCODER_VIRTUAL, NULL);
98 if (ret) {
99 DRM_ERROR("Failed to init encoder\n");
100 return ret;
101 }
102 encoder->possible_crtcs = drm_crtc_mask(&output->crtc);
103
104 /* Attach the encoder and the connector */
105 ret = drm_connector_attach_encoder(connector, encoder);
106 if (ret) {
107 DRM_ERROR("Failed to attach connector to encoder\n");
108 return ret;
109 }
110
111 /* Initialize the writeback component */
112 if (vkmsdev->config->writeback) {
113 writeback = vkms_enable_writeback_connector(vkmsdev, output);
114 if (writeback)
115 DRM_ERROR("Failed to init writeback connector\n");
116 }
117
118 drm_mode_config_reset(dev);
119
120 return ret;
121 }
122