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