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13#include <linux/component.h>
14#include <linux/of_graph.h>
15
16#include <drm/drmP.h>
17#include <drm/drm_crtc_helper.h>
18#include <drm/drm_fb_cma_helper.h>
19#include <drm/drm_gem_cma_helper.h>
20
21#include "sun4i_crtc.h"
22#include "sun4i_drv.h"
23#include "sun4i_framebuffer.h"
24#include "sun4i_layer.h"
25#include "sun4i_tcon.h"
26
27static int sun4i_drv_enable_vblank(struct drm_device *drm, unsigned int pipe)
28{
29 struct sun4i_drv *drv = drm->dev_private;
30 struct sun4i_tcon *tcon = drv->tcon;
31
32 DRM_DEBUG_DRIVER("Enabling VBLANK on pipe %d\n", pipe);
33
34 sun4i_tcon_enable_vblank(tcon, true);
35
36 return 0;
37}
38
39static void sun4i_drv_disable_vblank(struct drm_device *drm, unsigned int pipe)
40{
41 struct sun4i_drv *drv = drm->dev_private;
42 struct sun4i_tcon *tcon = drv->tcon;
43
44 DRM_DEBUG_DRIVER("Disabling VBLANK on pipe %d\n", pipe);
45
46 sun4i_tcon_enable_vblank(tcon, false);
47}
48
49static const struct file_operations sun4i_drv_fops = {
50 .owner = THIS_MODULE,
51 .open = drm_open,
52 .release = drm_release,
53 .unlocked_ioctl = drm_ioctl,
54#ifdef CONFIG_COMPAT
55 .compat_ioctl = drm_compat_ioctl,
56#endif
57 .poll = drm_poll,
58 .read = drm_read,
59 .llseek = no_llseek,
60 .mmap = drm_gem_cma_mmap,
61};
62
63static struct drm_driver sun4i_drv_driver = {
64 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME | DRIVER_ATOMIC,
65
66
67 .fops = &sun4i_drv_fops,
68 .name = "sun4i-drm",
69 .desc = "Allwinner sun4i Display Engine",
70 .date = "20150629",
71 .major = 1,
72 .minor = 0,
73
74
75 .dumb_create = drm_gem_cma_dumb_create,
76 .dumb_destroy = drm_gem_dumb_destroy,
77 .dumb_map_offset = drm_gem_cma_dumb_map_offset,
78 .gem_free_object_unlocked = drm_gem_cma_free_object,
79 .gem_vm_ops = &drm_gem_cma_vm_ops,
80
81
82 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
83 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
84 .gem_prime_import = drm_gem_prime_import,
85 .gem_prime_export = drm_gem_prime_export,
86 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
87 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
88 .gem_prime_vmap = drm_gem_cma_prime_vmap,
89 .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
90 .gem_prime_mmap = drm_gem_cma_prime_mmap,
91
92
93
94
95 .get_vblank_counter = drm_vblank_no_hw_counter,
96 .enable_vblank = sun4i_drv_enable_vblank,
97 .disable_vblank = sun4i_drv_disable_vblank,
98};
99
100static void sun4i_remove_framebuffers(void)
101{
102 struct apertures_struct *ap;
103
104 ap = alloc_apertures(1);
105 if (!ap)
106 return;
107
108
109 ap->ranges[0].base = 0;
110 ap->ranges[0].size = ~0;
111
112 remove_conflicting_framebuffers(ap, "sun4i-drm-fb", false);
113 kfree(ap);
114}
115
116static int sun4i_drv_bind(struct device *dev)
117{
118 struct drm_device *drm;
119 struct sun4i_drv *drv;
120 int ret;
121
122 drm = drm_dev_alloc(&sun4i_drv_driver, dev);
123 if (!drm)
124 return -ENOMEM;
125
126 drv = devm_kzalloc(dev, sizeof(*drv), GFP_KERNEL);
127 if (!drv) {
128 ret = -ENOMEM;
129 goto free_drm;
130 }
131 drm->dev_private = drv;
132
133 drm_vblank_init(drm, 1);
134 drm_mode_config_init(drm);
135
136 ret = component_bind_all(drm->dev, drm);
137 if (ret) {
138 dev_err(drm->dev, "Couldn't bind all pipelines components\n");
139 goto free_drm;
140 }
141
142
143 drv->layers = sun4i_layers_init(drm);
144 if (!drv->layers) {
145 dev_err(drm->dev, "Couldn't create the planes\n");
146 ret = -EINVAL;
147 goto free_drm;
148 }
149
150
151 drv->crtc = sun4i_crtc_init(drm);
152 if (!drv->crtc) {
153 dev_err(drm->dev, "Couldn't create the CRTC\n");
154 ret = -EINVAL;
155 goto free_drm;
156 }
157 drm->irq_enabled = true;
158
159
160 sun4i_remove_framebuffers();
161
162
163 drv->fbdev = sun4i_framebuffer_init(drm);
164 if (IS_ERR(drv->fbdev)) {
165 dev_err(drm->dev, "Couldn't create our framebuffer\n");
166 ret = PTR_ERR(drv->fbdev);
167 goto free_drm;
168 }
169
170
171 drm_kms_helper_poll_init(drm);
172
173 ret = drm_dev_register(drm, 0);
174 if (ret)
175 goto free_drm;
176
177 return 0;
178
179free_drm:
180 drm_dev_unref(drm);
181 return ret;
182}
183
184static void sun4i_drv_unbind(struct device *dev)
185{
186 struct drm_device *drm = dev_get_drvdata(dev);
187
188 drm_dev_unregister(drm);
189 drm_kms_helper_poll_fini(drm);
190 sun4i_framebuffer_free(drm);
191 drm_vblank_cleanup(drm);
192 drm_dev_unref(drm);
193}
194
195static const struct component_master_ops sun4i_drv_master_ops = {
196 .bind = sun4i_drv_bind,
197 .unbind = sun4i_drv_unbind,
198};
199
200static bool sun4i_drv_node_is_frontend(struct device_node *node)
201{
202 return of_device_is_compatible(node,
203 "allwinner,sun5i-a13-display-frontend");
204}
205
206static bool sun4i_drv_node_is_tcon(struct device_node *node)
207{
208 return of_device_is_compatible(node, "allwinner,sun5i-a13-tcon");
209}
210
211static int compare_of(struct device *dev, void *data)
212{
213 DRM_DEBUG_DRIVER("Comparing of node %s with %s\n",
214 of_node_full_name(dev->of_node),
215 of_node_full_name(data));
216
217 return dev->of_node == data;
218}
219
220static int sun4i_drv_add_endpoints(struct device *dev,
221 struct component_match **match,
222 struct device_node *node)
223{
224 struct device_node *port, *ep, *remote;
225 int count = 0;
226
227
228
229
230
231
232 if (!sun4i_drv_node_is_frontend(node) &&
233 !of_device_is_available(node))
234 return 0;
235
236 if (!sun4i_drv_node_is_frontend(node)) {
237
238 DRM_DEBUG_DRIVER("Adding component %s\n",
239 of_node_full_name(node));
240 component_match_add(dev, match, compare_of, node);
241 count++;
242 }
243
244
245 port = of_graph_get_port_by_id(node, 1);
246 if (!port) {
247 DRM_DEBUG_DRIVER("No output to bind\n");
248 return count;
249 }
250
251 for_each_available_child_of_node(port, ep) {
252 remote = of_graph_get_remote_port_parent(ep);
253 if (!remote) {
254 DRM_DEBUG_DRIVER("Error retrieving the output node\n");
255 of_node_put(remote);
256 continue;
257 }
258
259
260
261
262
263
264 if (sun4i_drv_node_is_tcon(node)) {
265 struct of_endpoint endpoint;
266
267 if (of_graph_parse_endpoint(ep, &endpoint)) {
268 DRM_DEBUG_DRIVER("Couldn't parse endpoint\n");
269 continue;
270 }
271
272 if (!endpoint.id) {
273 DRM_DEBUG_DRIVER("Endpoint is our panel... skipping\n");
274 continue;
275 }
276 }
277
278
279 count += sun4i_drv_add_endpoints(dev, match, remote);
280
281 of_node_put(remote);
282 }
283
284 return count;
285}
286
287static int sun4i_drv_probe(struct platform_device *pdev)
288{
289 struct component_match *match = NULL;
290 struct device_node *np = pdev->dev.of_node;
291 int i, count = 0;
292
293 for (i = 0;; i++) {
294 struct device_node *pipeline = of_parse_phandle(np,
295 "allwinner,pipelines",
296 i);
297 if (!pipeline)
298 break;
299
300 count += sun4i_drv_add_endpoints(&pdev->dev, &match,
301 pipeline);
302 of_node_put(pipeline);
303
304 DRM_DEBUG_DRIVER("Queued %d outputs on pipeline %d\n",
305 count, i);
306 }
307
308 if (count)
309 return component_master_add_with_match(&pdev->dev,
310 &sun4i_drv_master_ops,
311 match);
312 else
313 return 0;
314}
315
316static int sun4i_drv_remove(struct platform_device *pdev)
317{
318 return 0;
319}
320
321static const struct of_device_id sun4i_drv_of_table[] = {
322 { .compatible = "allwinner,sun5i-a13-display-engine" },
323 { }
324};
325MODULE_DEVICE_TABLE(of, sun4i_drv_of_table);
326
327static struct platform_driver sun4i_drv_platform_driver = {
328 .probe = sun4i_drv_probe,
329 .remove = sun4i_drv_remove,
330 .driver = {
331 .name = "sun4i-drm",
332 .of_match_table = sun4i_drv_of_table,
333 },
334};
335module_platform_driver(sun4i_drv_platform_driver);
336
337MODULE_AUTHOR("Boris Brezillon <boris.brezillon@free-electrons.com>");
338MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
339MODULE_DESCRIPTION("Allwinner A10 Display Engine DRM/KMS Driver");
340MODULE_LICENSE("GPL");
341
