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9026e0d1 MR |
1 | /* |
2 | * Copyright (C) 2015 Free Electrons | |
3 | * Copyright (C) 2015 NextThing Co | |
4 | * | |
5 | * Maxime Ripard <maxime.ripard@free-electrons.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU General Public License as | |
9 | * published by the Free Software Foundation; either version 2 of | |
10 | * the License, or (at your option) any later version. | |
11 | */ | |
12 | ||
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 | ||
9026e0d1 MR |
27 | static 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 | ||
39 | static 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 | ||
49 | static 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 | ||
63 | static struct drm_driver sun4i_drv_driver = { | |
64 | .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME | DRIVER_ATOMIC, | |
65 | ||
66 | /* Generic Operations */ | |
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 | /* GEM Operations */ | |
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, | |
ae2c6221 | 78 | .gem_free_object_unlocked = drm_gem_cma_free_object, |
9026e0d1 MR |
79 | .gem_vm_ops = &drm_gem_cma_vm_ops, |
80 | ||
81 | /* PRIME Operations */ | |
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 | /* Frame Buffer Operations */ | |
93 | ||
94 | /* VBlank Operations */ | |
0b340405 | 95 | .get_vblank_counter = drm_vblank_no_hw_counter, |
9026e0d1 MR |
96 | .enable_vblank = sun4i_drv_enable_vblank, |
97 | .disable_vblank = sun4i_drv_disable_vblank, | |
98 | }; | |
99 | ||
3d6bd906 MR |
100 | static void sun4i_remove_framebuffers(void) |
101 | { | |
102 | struct apertures_struct *ap; | |
103 | ||
104 | ap = alloc_apertures(1); | |
105 | if (!ap) | |
106 | return; | |
107 | ||
108 | /* The framebuffer can be located anywhere in RAM */ | |
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 | ||
9026e0d1 MR |
116 | static 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 | ||
9026e0d1 MR |
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 | /* Create our layers */ | |
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 | /* Create our CRTC */ | |
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 | ||
3d6bd906 MR |
159 | /* Remove early framebuffers (ie. simplefb) */ |
160 | sun4i_remove_framebuffers(); | |
161 | ||
9026e0d1 MR |
162 | /* Create our framebuffer */ |
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 | /* Enable connectors polling */ | |
171 | drm_kms_helper_poll_init(drm); | |
172 | ||
173 | ret = drm_dev_register(drm, 0); | |
174 | if (ret) | |
175 | goto free_drm; | |
176 | ||
9026e0d1 MR |
177 | return 0; |
178 | ||
9026e0d1 MR |
179 | free_drm: |
180 | drm_dev_unref(drm); | |
181 | return ret; | |
182 | } | |
183 | ||
184 | static 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 | ||
195 | static const struct component_master_ops sun4i_drv_master_ops = { | |
196 | .bind = sun4i_drv_bind, | |
197 | .unbind = sun4i_drv_unbind, | |
198 | }; | |
199 | ||
200 | static 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 | ||
29e57fab MR |
206 | static bool sun4i_drv_node_is_tcon(struct device_node *node) |
207 | { | |
208 | return of_device_is_compatible(node, "allwinner,sun5i-a13-tcon"); | |
209 | } | |
210 | ||
9026e0d1 MR |
211 | static 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 | ||
220 | static 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 | * We don't support the frontend for now, so we will never | |
229 | * have a device bound. Just skip over it, but we still want | |
230 | * the rest our pipeline to be added. | |
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 | /* Add current component */ | |
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 | /* Inputs are listed first, then outputs */ | |
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 | ||
29e57fab MR |
259 | /* |
260 | * If the node is our TCON, the first port is used for our | |
261 | * panel, and will not be part of the | |
262 | * component framework. | |
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 | ||
9026e0d1 MR |
278 | /* Walk down our tree */ |
279 | count += sun4i_drv_add_endpoints(dev, match, remote); | |
280 | ||
281 | of_node_put(remote); | |
282 | } | |
283 | ||
284 | return count; | |
285 | } | |
286 | ||
287 | static 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); | |
3b8e64f6 | 302 | of_node_put(pipeline); |
9026e0d1 MR |
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 | ||
316 | static int sun4i_drv_remove(struct platform_device *pdev) | |
317 | { | |
318 | return 0; | |
319 | } | |
320 | ||
321 | static const struct of_device_id sun4i_drv_of_table[] = { | |
322 | { .compatible = "allwinner,sun5i-a13-display-engine" }, | |
323 | { } | |
324 | }; | |
325 | MODULE_DEVICE_TABLE(of, sun4i_drv_of_table); | |
326 | ||
327 | static 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 | }; | |
335 | module_platform_driver(sun4i_drv_platform_driver); | |
336 | ||
337 | MODULE_AUTHOR("Boris Brezillon <boris.brezillon@free-electrons.com>"); | |
338 | MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>"); | |
339 | MODULE_DESCRIPTION("Allwinner A10 Display Engine DRM/KMS Driver"); | |
340 | MODULE_LICENSE("GPL"); |