1 // SPDX-License-Identifier: GPL-2.0-only
2
3 #include <drm/drm_atomic_helper.h>
4 #include <drm/drm_modeset_helper_vtables.h>
5 #include <drm/drm_probe_helper.h>
6
7 #include "mgag200_ddc.h"
8 #include "mgag200_drv.h"
9
10 static const struct drm_encoder_funcs mgag200_dac_encoder_funcs = {
11 .destroy = drm_encoder_cleanup
12 };
13
14 static const struct drm_connector_helper_funcs mgag200_vga_connector_helper_funcs = {
15 .get_modes = drm_connector_helper_get_modes,
16 .detect_ctx = drm_connector_helper_detect_from_ddc
17 };
18
19 static const struct drm_connector_funcs mgag200_vga_connector_funcs = {
20 .reset = drm_atomic_helper_connector_reset,
21 .fill_modes = drm_helper_probe_single_connector_modes,
22 .destroy = drm_connector_cleanup,
23 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
24 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state
25 };
26
mgag200_vga_output_init(struct mga_device * mdev)27 int mgag200_vga_output_init(struct mga_device *mdev)
28 {
29 struct drm_device *dev = &mdev->base;
30 struct drm_crtc *crtc = &mdev->crtc;
31 struct drm_encoder *encoder;
32 struct drm_connector *connector;
33 struct i2c_adapter *ddc;
34 int ret;
35
36 encoder = &mdev->output.vga.encoder;
37 ret = drm_encoder_init(dev, encoder, &mgag200_dac_encoder_funcs,
38 DRM_MODE_ENCODER_DAC, NULL);
39 if (ret) {
40 drm_err(dev, "drm_encoder_init() failed: %d\n", ret);
41 return ret;
42 }
43 encoder->possible_crtcs = drm_crtc_mask(crtc);
44
45 ddc = mgag200_ddc_create(mdev);
46 if (IS_ERR(ddc)) {
47 ret = PTR_ERR(ddc);
48 drm_err(dev, "failed to add DDC bus: %d\n", ret);
49 return ret;
50 }
51
52 connector = &mdev->output.vga.connector;
53 ret = drm_connector_init_with_ddc(dev, connector,
54 &mgag200_vga_connector_funcs,
55 DRM_MODE_CONNECTOR_VGA, ddc);
56 if (ret) {
57 drm_err(dev, "drm_connector_init_with_ddc() failed: %d\n", ret);
58 return ret;
59 }
60 drm_connector_helper_add(connector, &mgag200_vga_connector_helper_funcs);
61
62 connector->polled = DRM_CONNECTOR_POLL_CONNECT |
63 DRM_CONNECTOR_POLL_DISCONNECT;
64
65 ret = drm_connector_attach_encoder(connector, encoder);
66 if (ret) {
67 drm_err(dev, "drm_connector_attach_encoder() failed: %d\n", ret);
68 return ret;
69 }
70
71 return 0;
72 }
73