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
10static const struct drm_encoder_funcs mgag200_dac_encoder_funcs = {
11	.destroy = drm_encoder_cleanup
12};
13
14static 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
19static 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
27int 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}