1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Hisilicon Kirin SoCs drm master driver
4 *
5 * Copyright (c) 2016 Linaro Limited.
6 * Copyright (c) 2014-2016 HiSilicon Limited.
7 *
8 * Author:
9 * Xinliang Liu <z.liuxinliang@hisilicon.com>
10 * Xinliang Liu <xinliang.liu@linaro.org>
11 * Xinwei Kong <kong.kongxinwei@hisilicon.com>
12 */
13
14 #include <linux/component.h>
15 #include <linux/module.h>
16 #include <linux/of.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_client_setup.h>
22 #include <drm/drm_drv.h>
23 #include <drm/drm_gem_dma_helper.h>
24 #include <drm/drm_gem_framebuffer_helper.h>
25 #include <drm/drm_module.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
34 struct kirin_drm_private {
35 struct kirin_crtc crtc;
36 struct kirin_plane planes[KIRIN_MAX_PLANE];
37 void *hw_ctx;
38 };
39
kirin_drm_crtc_init(struct drm_device * dev,struct drm_crtc * crtc,struct drm_plane * plane,const struct kirin_drm_data * driver_data)40 static 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 /* set crtc port so that
48 * drm_of_find_possible_crtcs call works
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
kirin_drm_plane_init(struct drm_device * dev,struct drm_plane * plane,enum drm_plane_type type,const struct kirin_drm_data * data)70 static 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
kirin_drm_private_cleanup(struct drm_device * dev)90 static 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
kirin_drm_private_init(struct drm_device * dev,const struct kirin_drm_data * driver_data)103 static 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 * plane init
129 * TODO: Now only support primary plane, overlay planes
130 * need to do.
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 /* crtc init */
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
kirin_drm_kms_init(struct drm_device * dev,const struct kirin_drm_data * driver_data)157 static int kirin_drm_kms_init(struct drm_device *dev,
158 const struct kirin_drm_data *driver_data)
159 {
160 int ret;
161
162 /* dev->mode_config initialization */
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 /* display controller init */
171 ret = kirin_drm_private_init(dev, driver_data);
172 if (ret)
173 goto err_mode_config_cleanup;
174
175 /* bind and init sub drivers */
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 /* vblank init */
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 /* reset all the states of crtc/plane/encoder/connector */
190 drm_mode_config_reset(dev);
191
192 /* init kms poll for handling hpd */
193 drm_kms_helper_poll_init(dev);
194
195 return 0;
196
197 err_unbind_all:
198 component_unbind_all(dev->dev, dev);
199 err_private_cleanup:
200 kirin_drm_private_cleanup(dev);
201 err_mode_config_cleanup:
202 drm_mode_config_cleanup(dev);
203 return ret;
204 }
205
kirin_drm_kms_cleanup(struct drm_device * dev)206 static int kirin_drm_kms_cleanup(struct drm_device *dev)
207 {
208 drm_kms_helper_poll_fini(dev);
209 drm_atomic_helper_shutdown(dev);
210 kirin_drm_private_cleanup(dev);
211 drm_mode_config_cleanup(dev);
212
213 return 0;
214 }
215
kirin_drm_bind(struct device * dev)216 static int kirin_drm_bind(struct device *dev)
217 {
218 struct kirin_drm_data *driver_data;
219 struct drm_device *drm_dev;
220 int ret;
221
222 driver_data = (struct kirin_drm_data *)of_device_get_match_data(dev);
223 if (!driver_data)
224 return -EINVAL;
225
226 drm_dev = drm_dev_alloc(driver_data->driver, dev);
227 if (IS_ERR(drm_dev))
228 return PTR_ERR(drm_dev);
229 dev_set_drvdata(dev, drm_dev);
230
231 /* display controller init */
232 ret = kirin_drm_kms_init(drm_dev, driver_data);
233 if (ret)
234 goto err_drm_dev_put;
235
236 ret = drm_dev_register(drm_dev, 0);
237 if (ret)
238 goto err_kms_cleanup;
239
240 drm_client_setup(drm_dev, NULL);
241
242 return 0;
243
244 err_kms_cleanup:
245 kirin_drm_kms_cleanup(drm_dev);
246 err_drm_dev_put:
247 drm_dev_put(drm_dev);
248 dev_set_drvdata(dev, NULL);
249
250 return ret;
251 }
252
kirin_drm_unbind(struct device * dev)253 static void kirin_drm_unbind(struct device *dev)
254 {
255 struct drm_device *drm_dev = dev_get_drvdata(dev);
256
257 drm_dev_unregister(drm_dev);
258 kirin_drm_kms_cleanup(drm_dev);
259 drm_dev_put(drm_dev);
260 dev_set_drvdata(dev, NULL);
261 }
262
263 static const struct component_master_ops kirin_drm_ops = {
264 .bind = kirin_drm_bind,
265 .unbind = kirin_drm_unbind,
266 };
267
kirin_drm_platform_probe(struct platform_device * pdev)268 static int kirin_drm_platform_probe(struct platform_device *pdev)
269 {
270 struct device *dev = &pdev->dev;
271 struct device_node *np = dev->of_node;
272 struct component_match *match = NULL;
273 struct device_node *remote;
274
275 remote = of_graph_get_remote_node(np, 0, 0);
276 if (!remote)
277 return -ENODEV;
278
279 drm_of_component_match_add(dev, &match, component_compare_of, remote);
280 of_node_put(remote);
281
282 return component_master_add_with_match(dev, &kirin_drm_ops, match);
283 }
284
kirin_drm_platform_remove(struct platform_device * pdev)285 static void kirin_drm_platform_remove(struct platform_device *pdev)
286 {
287 component_master_del(&pdev->dev, &kirin_drm_ops);
288 }
289
kirin_drm_platform_shutdown(struct platform_device * pdev)290 static void kirin_drm_platform_shutdown(struct platform_device *pdev)
291 {
292 drm_atomic_helper_shutdown(platform_get_drvdata(pdev));
293 }
294
295 static const struct of_device_id kirin_drm_dt_ids[] = {
296 { .compatible = "hisilicon,hi6220-ade",
297 .data = &ade_driver_data,
298 },
299 { /* end node */ },
300 };
301 MODULE_DEVICE_TABLE(of, kirin_drm_dt_ids);
302
303 static struct platform_driver kirin_drm_platform_driver = {
304 .probe = kirin_drm_platform_probe,
305 .remove = kirin_drm_platform_remove,
306 .shutdown = kirin_drm_platform_shutdown,
307 .driver = {
308 .name = "kirin-drm",
309 .of_match_table = kirin_drm_dt_ids,
310 },
311 };
312
313 drm_module_platform_driver(kirin_drm_platform_driver);
314
315 MODULE_AUTHOR("Xinliang Liu <xinliang.liu@linaro.org>");
316 MODULE_AUTHOR("Xinliang Liu <z.liuxinliang@hisilicon.com>");
317 MODULE_AUTHOR("Xinwei Kong <kong.kongxinwei@hisilicon.com>");
318 MODULE_DESCRIPTION("hisilicon Kirin SoCs' DRM master driver");
319 MODULE_LICENSE("GPL v2");
320