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6#include <drm/drm_atomic.h>
7#include <drm/drm_atomic_helper.h>
8#include <drm/drm_bridge_connector.h>
9#include <drm/drm_drv.h>
10#include <drm/drm_fb_helper.h>
11#include <drm/drm_gem_cma_helper.h>
12#include <drm/drm_gem_framebuffer_helper.h>
13#include <drm/drm_of.h>
14#include <drm/drm_probe_helper.h>
15#include <drm/drm_vblank.h>
16
17#include "dcss-dev.h"
18#include "dcss-kms.h"
19
20DEFINE_DRM_GEM_CMA_FOPS(dcss_cma_fops);
21
22static const struct drm_mode_config_funcs dcss_drm_mode_config_funcs = {
23 .fb_create = drm_gem_fb_create,
24 .output_poll_changed = drm_fb_helper_output_poll_changed,
25 .atomic_check = drm_atomic_helper_check,
26 .atomic_commit = drm_atomic_helper_commit,
27};
28
29static const struct drm_driver dcss_kms_driver = {
30 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC,
31 DRM_GEM_CMA_DRIVER_OPS,
32 .fops = &dcss_cma_fops,
33 .name = "imx-dcss",
34 .desc = "i.MX8MQ Display Subsystem",
35 .date = "20190917",
36 .major = 1,
37 .minor = 0,
38 .patchlevel = 0,
39};
40
41static const struct drm_mode_config_helper_funcs dcss_mode_config_helpers = {
42 .atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
43};
44
45static void dcss_kms_mode_config_init(struct dcss_kms_dev *kms)
46{
47 struct drm_mode_config *config = &kms->base.mode_config;
48
49 drm_mode_config_init(&kms->base);
50
51 config->min_width = 1;
52 config->min_height = 1;
53 config->max_width = 4096;
54 config->max_height = 4096;
55 config->normalize_zpos = true;
56
57 config->funcs = &dcss_drm_mode_config_funcs;
58 config->helper_private = &dcss_mode_config_helpers;
59}
60
61static const struct drm_encoder_funcs dcss_kms_simple_encoder_funcs = {
62 .destroy = drm_encoder_cleanup,
63};
64
65static int dcss_kms_bridge_connector_init(struct dcss_kms_dev *kms)
66{
67 struct drm_device *ddev = &kms->base;
68 struct drm_encoder *encoder = &kms->encoder;
69 struct drm_crtc *crtc = (struct drm_crtc *)&kms->crtc;
70 struct drm_panel *panel;
71 struct drm_bridge *bridge;
72 int ret;
73
74 ret = drm_of_find_panel_or_bridge(ddev->dev->of_node, 0, 0,
75 &panel, &bridge);
76 if (ret)
77 return ret;
78
79 if (!bridge) {
80 dev_err(ddev->dev, "No bridge found %d.\n", ret);
81 return -ENODEV;
82 }
83
84 encoder->possible_crtcs = drm_crtc_mask(crtc);
85
86 ret = drm_encoder_init(&kms->base, encoder,
87 &dcss_kms_simple_encoder_funcs,
88 DRM_MODE_ENCODER_NONE, NULL);
89 if (ret) {
90 dev_err(ddev->dev, "Failed initializing encoder %d.\n", ret);
91 return ret;
92 }
93
94 ret = drm_bridge_attach(encoder, bridge, NULL,
95 DRM_BRIDGE_ATTACH_NO_CONNECTOR);
96 if (ret < 0)
97 return ret;
98
99 kms->connector = drm_bridge_connector_init(ddev, encoder);
100 if (IS_ERR(kms->connector)) {
101 dev_err(ddev->dev, "Unable to create bridge connector.\n");
102 return PTR_ERR(kms->connector);
103 }
104
105 drm_connector_attach_encoder(kms->connector, encoder);
106
107 return 0;
108}
109
110struct dcss_kms_dev *dcss_kms_attach(struct dcss_dev *dcss)
111{
112 struct dcss_kms_dev *kms;
113 struct drm_device *drm;
114 struct dcss_crtc *crtc;
115 int ret;
116
117 kms = devm_drm_dev_alloc(dcss->dev, &dcss_kms_driver,
118 struct dcss_kms_dev, base);
119 if (IS_ERR(kms))
120 return kms;
121
122 drm = &kms->base;
123 crtc = &kms->crtc;
124
125 drm->dev_private = dcss;
126
127 dcss_kms_mode_config_init(kms);
128
129 ret = drm_vblank_init(drm, 1);
130 if (ret)
131 goto cleanup_mode_config;
132
133 ret = dcss_kms_bridge_connector_init(kms);
134 if (ret)
135 goto cleanup_mode_config;
136
137 ret = dcss_crtc_init(crtc, drm);
138 if (ret)
139 goto cleanup_mode_config;
140
141 drm_mode_config_reset(drm);
142
143 drm_kms_helper_poll_init(drm);
144
145 drm_bridge_connector_enable_hpd(kms->connector);
146
147 ret = drm_dev_register(drm, 0);
148 if (ret)
149 goto cleanup_crtc;
150
151 drm_fbdev_generic_setup(drm, 32);
152
153 return kms;
154
155cleanup_crtc:
156 drm_bridge_connector_disable_hpd(kms->connector);
157 drm_kms_helper_poll_fini(drm);
158 dcss_crtc_deinit(crtc, drm);
159
160cleanup_mode_config:
161 drm_mode_config_cleanup(drm);
162 drm->dev_private = NULL;
163
164 return ERR_PTR(ret);
165}
166
167void dcss_kms_detach(struct dcss_kms_dev *kms)
168{
169 struct drm_device *drm = &kms->base;
170
171 drm_dev_unregister(drm);
172 drm_bridge_connector_disable_hpd(kms->connector);
173 drm_kms_helper_poll_fini(drm);
174 drm_atomic_helper_shutdown(drm);
175 drm_crtc_vblank_off(&kms->crtc.base);
176 drm_mode_config_cleanup(drm);
177 dcss_crtc_deinit(&kms->crtc, drm);
178 drm->dev_private = NULL;
179}
180
