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 "vkms_drv.h"
4#include <drm/drm_atomic_helper.h>
5#include <drm/drm_probe_helper.h>
6#include <drm/drm_simple_kms_helper.h>
7
8static void vkms_connector_destroy(struct drm_connector *connector)
9{
10 drm_connector_cleanup(connector);
11}
12
13static const struct drm_connector_funcs vkms_connector_funcs = {
14 .fill_modes = drm_helper_probe_single_connector_modes,
15 .destroy = vkms_connector_destroy,
16 .reset = drm_atomic_helper_connector_reset,
17 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
18 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
19};
20
21static int vkms_conn_get_modes(struct drm_connector *connector)
22{
23 int count;
24
25 count = drm_add_modes_noedid(connector, XRES_MAX, YRES_MAX);
26 drm_set_preferred_mode(connector, XRES_DEF, YRES_DEF);
27
28 return count;
29}
30
31static const struct drm_connector_helper_funcs vkms_conn_helper_funcs = {
32 .get_modes = vkms_conn_get_modes,
33};
34
35int vkms_output_init(struct vkms_device *vkmsdev, int index)
36{
37 struct vkms_output *output = &vkmsdev->output;
38 struct drm_device *dev = &vkmsdev->drm;
39 struct drm_connector *connector = &output->connector;
40 struct drm_encoder *encoder = &output->encoder;
41 struct drm_crtc *crtc = &output->crtc;
42 struct vkms_plane *primary, *cursor = NULL, *overlay = NULL;
43 int ret;
44 int writeback;
45
46 primary = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_PRIMARY, index);
47 if (IS_ERR(primary))
48 return PTR_ERR(primary);
49
50 if (vkmsdev->config->overlay) {
51 overlay = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_OVERLAY, index);
52 if (IS_ERR(overlay))
53 return PTR_ERR(overlay);
54
55 if (!overlay->base.possible_crtcs)
56 overlay->base.possible_crtcs = drm_crtc_mask(crtc);
57 }
58
59 if (vkmsdev->config->cursor) {
60 cursor = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_CURSOR, index);
61 if (IS_ERR(cursor))
62 return PTR_ERR(cursor);
63 }
64
65 ret = vkms_crtc_init(dev, crtc, &primary->base, &cursor->base);
66 if (ret)
67 return ret;
68
69 ret = drm_connector_init(dev, connector, &vkms_connector_funcs,
70 DRM_MODE_CONNECTOR_VIRTUAL);
71 if (ret) {
72 DRM_ERROR("Failed to init connector\n");
73 goto err_connector;
74 }
75
76 drm_connector_helper_add(connector, &vkms_conn_helper_funcs);
77
78 ret = drm_simple_encoder_init(dev, encoder, DRM_MODE_ENCODER_VIRTUAL);
79 if (ret) {
80 DRM_ERROR("Failed to init encoder\n");
81 goto err_encoder;
82 }
83 encoder->possible_crtcs = 1;
84
85 ret = drm_connector_attach_encoder(connector, encoder);
86 if (ret) {
87 DRM_ERROR("Failed to attach connector to encoder\n");
88 goto err_attach;
89 }
90
91 if (vkmsdev->config->writeback) {
92 writeback = vkms_enable_writeback_connector(vkmsdev);
93 if (writeback)
94 DRM_ERROR("Failed to init writeback connector\n");
95 }
96
97 drm_mode_config_reset(dev);
98
99 return 0;
100
101err_attach:
102 drm_encoder_cleanup(encoder);
103
104err_encoder:
105 drm_connector_cleanup(connector);
106
107err_connector:
108 drm_crtc_cleanup(crtc);
109
110 return ret;
111}