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14#include <linux/of_platform.h>
15#include <linux/component.h>
16#include <linux/module.h>
17#include <linux/of_graph.h>
18#include <linux/platform_device.h>
19
20#include <drm/drm_atomic_helper.h>
21#include <drm/drm_drv.h>
22#include <drm/drm_fb_cma_helper.h>
23#include <drm/drm_fb_helper.h>
24#include <drm/drm_gem_cma_helper.h>
25#include <drm/drm_gem_framebuffer_helper.h>
26#include <drm/drm_of.h>
27#include <drm/drm_probe_helper.h>
28#include <drm/drm_vblank.h>
29
30#include "kirin_drm_drv.h"
31
32#define KIRIN_MAX_PLANE 2
33
34struct kirin_drm_private {
35 struct kirin_crtc crtc;
36 struct kirin_plane planes[KIRIN_MAX_PLANE];
37 void *hw_ctx;
38};
39
40static int kirin_drm_crtc_init(struct drm_device *dev, struct drm_crtc *crtc,
41 struct drm_plane *plane,
42 const struct kirin_drm_data *driver_data)
43{
44 struct device_node *port;
45 int ret;
46
47
48
49
50 port = of_get_child_by_name(dev->dev->of_node, "port");
51 if (!port) {
52 DRM_ERROR("no port node found in %pOF\n", dev->dev->of_node);
53 return -EINVAL;
54 }
55 of_node_put(port);
56 crtc->port = port;
57
58 ret = drm_crtc_init_with_planes(dev, crtc, plane, NULL,
59 driver_data->crtc_funcs, NULL);
60 if (ret) {
61 DRM_ERROR("failed to init crtc.\n");
62 return ret;
63 }
64
65 drm_crtc_helper_add(crtc, driver_data->crtc_helper_funcs);
66
67 return 0;
68}
69
70static int kirin_drm_plane_init(struct drm_device *dev, struct drm_plane *plane,
71 enum drm_plane_type type,
72 const struct kirin_drm_data *data)
73{
74 int ret = 0;
75
76 ret = drm_universal_plane_init(dev, plane, 1, data->plane_funcs,
77 data->channel_formats,
78 data->channel_formats_cnt,
79 NULL, type, NULL);
80 if (ret) {
81 DRM_ERROR("fail to init plane, ch=%d\n", 0);
82 return ret;
83 }
84
85 drm_plane_helper_add(plane, data->plane_helper_funcs);
86
87 return 0;
88}
89
90static void kirin_drm_private_cleanup(struct drm_device *dev)
91{
92 struct kirin_drm_private *kirin_priv = dev->dev_private;
93 struct kirin_drm_data *data;
94
95 data = (struct kirin_drm_data *)of_device_get_match_data(dev->dev);
96 if (data->cleanup_hw_ctx)
97 data->cleanup_hw_ctx(kirin_priv->hw_ctx);
98
99 devm_kfree(dev->dev, kirin_priv);
100 dev->dev_private = NULL;
101}
102
103static int kirin_drm_private_init(struct drm_device *dev,
104 const struct kirin_drm_data *driver_data)
105{
106 struct platform_device *pdev = to_platform_device(dev->dev);
107 struct kirin_drm_private *kirin_priv;
108 struct drm_plane *prim_plane;
109 enum drm_plane_type type;
110 void *ctx;
111 int ret;
112 u32 ch;
113
114 kirin_priv = devm_kzalloc(dev->dev, sizeof(*kirin_priv), GFP_KERNEL);
115 if (!kirin_priv) {
116 DRM_ERROR("failed to alloc kirin_drm_private\n");
117 return -ENOMEM;
118 }
119
120 ctx = driver_data->alloc_hw_ctx(pdev, &kirin_priv->crtc.base);
121 if (IS_ERR(ctx)) {
122 DRM_ERROR("failed to initialize kirin_priv hw ctx\n");
123 return -EINVAL;
124 }
125 kirin_priv->hw_ctx = ctx;
126
127
128
129
130
131
132 for (ch = 0; ch < driver_data->num_planes; ch++) {
133 if (ch == driver_data->prim_plane)
134 type = DRM_PLANE_TYPE_PRIMARY;
135 else
136 type = DRM_PLANE_TYPE_OVERLAY;
137 ret = kirin_drm_plane_init(dev, &kirin_priv->planes[ch].base,
138 type, driver_data);
139 if (ret)
140 return ret;
141 kirin_priv->planes[ch].ch = ch;
142 kirin_priv->planes[ch].hw_ctx = ctx;
143 }
144
145
146 prim_plane = &kirin_priv->planes[driver_data->prim_plane].base;
147 ret = kirin_drm_crtc_init(dev, &kirin_priv->crtc.base,
148 prim_plane, driver_data);
149 if (ret)
150 return ret;
151 kirin_priv->crtc.hw_ctx = ctx;
152 dev->dev_private = kirin_priv;
153
154 return 0;
155}
156
157static int kirin_drm_kms_init(struct drm_device *dev,
158 const struct kirin_drm_data *driver_data)
159{
160 int ret;
161
162
163 drm_mode_config_init(dev);
164 dev->mode_config.min_width = 0;
165 dev->mode_config.min_height = 0;
166 dev->mode_config.max_width = driver_data->config_max_width;
167 dev->mode_config.max_height = driver_data->config_max_width;
168 dev->mode_config.funcs = driver_data->mode_config_funcs;
169
170
171 ret = kirin_drm_private_init(dev, driver_data);
172 if (ret)
173 goto err_mode_config_cleanup;
174
175
176 ret = component_bind_all(dev->dev, dev);
177 if (ret) {
178 DRM_ERROR("failed to bind all component.\n");
179 goto err_private_cleanup;
180 }
181
182
183 ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
184 if (ret) {
185 DRM_ERROR("failed to initialize vblank.\n");
186 goto err_unbind_all;
187 }
188
189 dev->irq_enabled = true;
190
191
192 drm_mode_config_reset(dev);
193
194
195 drm_kms_helper_poll_init(dev);
196
197 return 0;
198
199err_unbind_all:
200 component_unbind_all(dev->dev, dev);
201err_private_cleanup:
202 kirin_drm_private_cleanup(dev);
203err_mode_config_cleanup:
204 drm_mode_config_cleanup(dev);
205 return ret;
206}
207
208static int compare_of(struct device *dev, void *data)
209{
210 return dev->of_node == data;
211}
212
213static int kirin_drm_kms_cleanup(struct drm_device *dev)
214{
215 drm_kms_helper_poll_fini(dev);
216 kirin_drm_private_cleanup(dev);
217 drm_mode_config_cleanup(dev);
218
219 return 0;
220}
221
222static int kirin_drm_bind(struct device *dev)
223{
224 struct kirin_drm_data *driver_data;
225 struct drm_device *drm_dev;
226 int ret;
227
228 driver_data = (struct kirin_drm_data *)of_device_get_match_data(dev);
229 if (!driver_data)
230 return -EINVAL;
231
232 drm_dev = drm_dev_alloc(driver_data->driver, dev);
233 if (IS_ERR(drm_dev))
234 return PTR_ERR(drm_dev);
235 dev_set_drvdata(dev, drm_dev);
236
237
238 ret = kirin_drm_kms_init(drm_dev, driver_data);
239 if (ret)
240 goto err_drm_dev_put;
241
242 ret = drm_dev_register(drm_dev, 0);
243 if (ret)
244 goto err_kms_cleanup;
245
246 drm_fbdev_generic_setup(drm_dev, 32);
247
248 return 0;
249
250err_kms_cleanup:
251 kirin_drm_kms_cleanup(drm_dev);
252err_drm_dev_put:
253 drm_dev_put(drm_dev);
254
255 return ret;
256}
257
258static void kirin_drm_unbind(struct device *dev)
259{
260 struct drm_device *drm_dev = dev_get_drvdata(dev);
261
262 drm_dev_unregister(drm_dev);
263 kirin_drm_kms_cleanup(drm_dev);
264 drm_dev_put(drm_dev);
265}
266
267static const struct component_master_ops kirin_drm_ops = {
268 .bind = kirin_drm_bind,
269 .unbind = kirin_drm_unbind,
270};
271
272static int kirin_drm_platform_probe(struct platform_device *pdev)
273{
274 struct device *dev = &pdev->dev;
275 struct device_node *np = dev->of_node;
276 struct component_match *match = NULL;
277 struct device_node *remote;
278
279 remote = of_graph_get_remote_node(np, 0, 0);
280 if (!remote)
281 return -ENODEV;
282
283 drm_of_component_match_add(dev, &match, compare_of, remote);
284 of_node_put(remote);
285
286 return component_master_add_with_match(dev, &kirin_drm_ops, match);
287}
288
289static int kirin_drm_platform_remove(struct platform_device *pdev)
290{
291 component_master_del(&pdev->dev, &kirin_drm_ops);
292 return 0;
293}
294
295static const struct of_device_id kirin_drm_dt_ids[] = {
296 { .compatible = "hisilicon,hi6220-ade",
297 .data = &ade_driver_data,
298 },
299 { },
300};
301MODULE_DEVICE_TABLE(of, kirin_drm_dt_ids);
302
303static struct platform_driver kirin_drm_platform_driver = {
304 .probe = kirin_drm_platform_probe,
305 .remove = kirin_drm_platform_remove,
306 .driver = {
307 .name = "kirin-drm",
308 .of_match_table = kirin_drm_dt_ids,
309 },
310};
311
312module_platform_driver(kirin_drm_platform_driver);
313
314MODULE_AUTHOR("Xinliang Liu <xinliang.liu@linaro.org>");
315MODULE_AUTHOR("Xinliang Liu <z.liuxinliang@hisilicon.com>");
316MODULE_AUTHOR("Xinwei Kong <kong.kongxinwei@hisilicon.com>");
317MODULE_DESCRIPTION("hisilicon Kirin SoCs' DRM master driver");
318MODULE_LICENSE("GPL v2");
319
