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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (C) 2015 Free Electrons
4 * Copyright (C) 2015 NextThing Co
5 *
6 * Maxime Ripard <maxime.ripard@free-electrons.com>
7 */
8
9#include <linux/component.h>
10#include <linux/kfifo.h>
11#include <linux/module.h>
12#include <linux/of_graph.h>
13#include <linux/of_reserved_mem.h>
14#include <linux/platform_device.h>
15
16#include <drm/drm_atomic_helper.h>
17#include <drm/drm_drv.h>
18#include <drm/drm_fb_cma_helper.h>
19#include <drm/drm_fb_helper.h>
20#include <drm/drm_gem_cma_helper.h>
21#include <drm/drm_of.h>
22#include <drm/drm_probe_helper.h>
23#include <drm/drm_vblank.h>
24
25#include "sun4i_drv.h"
26#include "sun4i_frontend.h"
27#include "sun4i_framebuffer.h"
28#include "sun4i_tcon.h"
29#include "sun8i_tcon_top.h"
30
31static int drm_sun4i_gem_dumb_create(struct drm_file *file_priv,
32 struct drm_device *drm,
33 struct drm_mode_create_dumb *args)
34{
35 /* The hardware only allows even pitches for YUV buffers. */
36 args->pitch = ALIGN(DIV_ROUND_UP(args->width * args->bpp, 8), 2);
37
38 return drm_gem_cma_dumb_create_internal(file_priv, drm, args);
39}
40
41DEFINE_DRM_GEM_CMA_FOPS(sun4i_drv_fops);
42
43static struct drm_driver sun4i_drv_driver = {
44 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
45
46 /* Generic Operations */
47 .fops = &sun4i_drv_fops,
48 .name = "sun4i-drm",
49 .desc = "Allwinner sun4i Display Engine",
50 .date = "20150629",
51 .major = 1,
52 .minor = 0,
53
54 /* GEM Operations */
55 DRM_GEM_CMA_VMAP_DRIVER_OPS,
56 .dumb_create = drm_sun4i_gem_dumb_create,
57};
58
59static int sun4i_drv_bind(struct device *dev)
60{
61 struct drm_device *drm;
62 struct sun4i_drv *drv;
63 int ret;
64
65 drm = drm_dev_alloc(&sun4i_drv_driver, dev);
66 if (IS_ERR(drm))
67 return PTR_ERR(drm);
68
69 drv = devm_kzalloc(dev, sizeof(*drv), GFP_KERNEL);
70 if (!drv) {
71 ret = -ENOMEM;
72 goto free_drm;
73 }
74
75 dev_set_drvdata(dev, drm);
76 drm->dev_private = drv;
77 INIT_LIST_HEAD(&drv->frontend_list);
78 INIT_LIST_HEAD(&drv->engine_list);
79 INIT_LIST_HEAD(&drv->tcon_list);
80
81 ret = of_reserved_mem_device_init(dev);
82 if (ret && ret != -ENODEV) {
83 dev_err(drm->dev, "Couldn't claim our memory region\n");
84 goto free_drm;
85 }
86
87 drm_mode_config_init(drm);
88 drm->mode_config.allow_fb_modifiers = true;
89
90 ret = component_bind_all(drm->dev, drm);
91 if (ret) {
92 dev_err(drm->dev, "Couldn't bind all pipelines components\n");
93 goto cleanup_mode_config;
94 }
95
96 /* drm_vblank_init calls kcalloc, which can fail */
97 ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
98 if (ret)
99 goto cleanup_mode_config;
100
101 drm->irq_enabled = true;
102
103 /* Remove early framebuffers (ie. simplefb) */
104 drm_fb_helper_remove_conflicting_framebuffers(NULL, "sun4i-drm-fb", false);
105
106 sun4i_framebuffer_init(drm);
107
108 /* Enable connectors polling */
109 drm_kms_helper_poll_init(drm);
110
111 ret = drm_dev_register(drm, 0);
112 if (ret)
113 goto finish_poll;
114
115 drm_fbdev_generic_setup(drm, 32);
116
117 return 0;
118
119finish_poll:
120 drm_kms_helper_poll_fini(drm);
121cleanup_mode_config:
122 drm_mode_config_cleanup(drm);
123 of_reserved_mem_device_release(dev);
124free_drm:
125 drm_dev_put(drm);
126 return ret;
127}
128
129static void sun4i_drv_unbind(struct device *dev)
130{
131 struct drm_device *drm = dev_get_drvdata(dev);
132
133 drm_dev_unregister(drm);
134 drm_kms_helper_poll_fini(drm);
135 drm_atomic_helper_shutdown(drm);
136 drm_mode_config_cleanup(drm);
137
138 component_unbind_all(dev, NULL);
139 of_reserved_mem_device_release(dev);
140
141 drm_dev_put(drm);
142}
143
144static const struct component_master_ops sun4i_drv_master_ops = {
145 .bind = sun4i_drv_bind,
146 .unbind = sun4i_drv_unbind,
147};
148
149static bool sun4i_drv_node_is_connector(struct device_node *node)
150{
151 return of_device_is_compatible(node, "hdmi-connector");
152}
153
154static bool sun4i_drv_node_is_frontend(struct device_node *node)
155{
156 return of_device_is_compatible(node, "allwinner,sun4i-a10-display-frontend") ||
157 of_device_is_compatible(node, "allwinner,sun5i-a13-display-frontend") ||
158 of_device_is_compatible(node, "allwinner,sun6i-a31-display-frontend") ||
159 of_device_is_compatible(node, "allwinner,sun7i-a20-display-frontend") ||
160 of_device_is_compatible(node, "allwinner,sun8i-a23-display-frontend") ||
161 of_device_is_compatible(node, "allwinner,sun8i-a33-display-frontend") ||
162 of_device_is_compatible(node, "allwinner,sun9i-a80-display-frontend");
163}
164
165static bool sun4i_drv_node_is_deu(struct device_node *node)
166{
167 return of_device_is_compatible(node, "allwinner,sun9i-a80-deu");
168}
169
170static bool sun4i_drv_node_is_supported_frontend(struct device_node *node)
171{
172 if (IS_ENABLED(CONFIG_DRM_SUN4I_BACKEND))
173 return !!of_match_node(sun4i_frontend_of_table, node);
174
175 return false;
176}
177
178static bool sun4i_drv_node_is_tcon(struct device_node *node)
179{
180 return !!of_match_node(sun4i_tcon_of_table, node);
181}
182
183static bool sun4i_drv_node_is_tcon_with_ch0(struct device_node *node)
184{
185 const struct of_device_id *match;
186
187 match = of_match_node(sun4i_tcon_of_table, node);
188 if (match) {
189 struct sun4i_tcon_quirks *quirks;
190
191 quirks = (struct sun4i_tcon_quirks *)match->data;
192
193 return quirks->has_channel_0;
194 }
195
196 return false;
197}
198
199static bool sun4i_drv_node_is_tcon_top(struct device_node *node)
200{
201 return IS_ENABLED(CONFIG_DRM_SUN8I_TCON_TOP) &&
202 !!of_match_node(sun8i_tcon_top_of_table, node);
203}
204
205static int compare_of(struct device *dev, void *data)
206{
207 DRM_DEBUG_DRIVER("Comparing of node %pOF with %pOF\n",
208 dev->of_node,
209 data);
210
211 return dev->of_node == data;
212}
213
214/*
215 * The encoder drivers use drm_of_find_possible_crtcs to get upstream
216 * crtcs from the device tree using of_graph. For the results to be
217 * correct, encoders must be probed/bound after _all_ crtcs have been
218 * created. The existing code uses a depth first recursive traversal
219 * of the of_graph, which means the encoders downstream of the TCON
220 * get add right after the first TCON. The second TCON or CRTC will
221 * never be properly associated with encoders connected to it.
222 *
223 * Also, in a dual display pipeline setup, both frontends can feed
224 * either backend, and both backends can feed either TCON, we want
225 * all components of the same type to be added before the next type
226 * in the pipeline. Fortunately, the pipelines are perfectly symmetric,
227 * i.e. components of the same type are at the same depth when counted
228 * from the frontend. The only exception is the third pipeline in
229 * the A80 SoC, which we do not support anyway.
230 *
231 * Hence we can use a breadth first search traversal order to add
232 * components. We do not need to check for duplicates. The component
233 * matching system handles this for us.
234 */
235struct endpoint_list {
236 DECLARE_KFIFO(fifo, struct device_node *, 16);
237};
238
239static void sun4i_drv_traverse_endpoints(struct endpoint_list *list,
240 struct device_node *node,
241 int port_id)
242{
243 struct device_node *ep, *remote, *port;
244
245 port = of_graph_get_port_by_id(node, port_id);
246 if (!port) {
247 DRM_DEBUG_DRIVER("No output to bind on port %d\n", port_id);
248 return;
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 continue;
256 }
257
258 if (sun4i_drv_node_is_tcon(node)) {
259 /*
260 * TCON TOP is always probed before TCON. However, TCON
261 * points back to TCON TOP when it is source for HDMI.
262 * We have to skip it here to prevent infinite looping
263 * between TCON TOP and TCON.
264 */
265 if (sun4i_drv_node_is_tcon_top(remote)) {
266 DRM_DEBUG_DRIVER("TCON output endpoint is TCON TOP... skipping\n");
267 of_node_put(remote);
268 continue;
269 }
270
271 /*
272 * If the node is our TCON with channel 0, the first
273 * port is used for panel or bridges, and will not be
274 * part of the component framework.
275 */
276 if (sun4i_drv_node_is_tcon_with_ch0(node)) {
277 struct of_endpoint endpoint;
278
279 if (of_graph_parse_endpoint(ep, &endpoint)) {
280 DRM_DEBUG_DRIVER("Couldn't parse endpoint\n");
281 of_node_put(remote);
282 continue;
283 }
284
285 if (!endpoint.id) {
286 DRM_DEBUG_DRIVER("Endpoint is our panel... skipping\n");
287 of_node_put(remote);
288 continue;
289 }
290 }
291 }
292
293 kfifo_put(&list->fifo, remote);
294 }
295}
296
297static int sun4i_drv_add_endpoints(struct device *dev,
298 struct endpoint_list *list,
299 struct component_match **match,
300 struct device_node *node)
301{
302 int count = 0;
303
304 /*
305 * The frontend has been disabled in some of our old device
306 * trees. If we find a node that is the frontend and is
307 * disabled, we should just follow through and parse its
308 * child, but without adding it to the component list.
309 * Otherwise, we obviously want to add it to the list.
310 */
311 if (!sun4i_drv_node_is_frontend(node) &&
312 !of_device_is_available(node))
313 return 0;
314
315 /*
316 * The connectors will be the last nodes in our pipeline, we
317 * can just bail out.
318 */
319 if (sun4i_drv_node_is_connector(node))
320 return 0;
321
322 /*
323 * If the device is either just a regular device, or an
324 * enabled frontend supported by the driver, we add it to our
325 * component list.
326 */
327 if (!(sun4i_drv_node_is_frontend(node) ||
328 sun4i_drv_node_is_deu(node)) ||
329 (sun4i_drv_node_is_supported_frontend(node) &&
330 of_device_is_available(node))) {
331 /* Add current component */
332 DRM_DEBUG_DRIVER("Adding component %pOF\n", node);
333 drm_of_component_match_add(dev, match, compare_of, node);
334 count++;
335 }
336
337 /* each node has at least one output */
338 sun4i_drv_traverse_endpoints(list, node, 1);
339
340 /* TCON TOP has second and third output */
341 if (sun4i_drv_node_is_tcon_top(node)) {
342 sun4i_drv_traverse_endpoints(list, node, 3);
343 sun4i_drv_traverse_endpoints(list, node, 5);
344 }
345
346 return count;
347}
348
349static int sun4i_drv_probe(struct platform_device *pdev)
350{
351 struct component_match *match = NULL;
352 struct device_node *np = pdev->dev.of_node, *endpoint;
353 struct endpoint_list list;
354 int i, ret, count = 0;
355
356 INIT_KFIFO(list.fifo);
357
358 for (i = 0;; i++) {
359 struct device_node *pipeline = of_parse_phandle(np,
360 "allwinner,pipelines",
361 i);
362 if (!pipeline)
363 break;
364
365 kfifo_put(&list.fifo, pipeline);
366 }
367
368 while (kfifo_get(&list.fifo, &endpoint)) {
369 /* process this endpoint */
370 ret = sun4i_drv_add_endpoints(&pdev->dev, &list, &match,
371 endpoint);
372
373 /* sun4i_drv_add_endpoints can fail to allocate memory */
374 if (ret < 0)
375 return ret;
376
377 count += ret;
378 }
379
380 if (count)
381 return component_master_add_with_match(&pdev->dev,
382 &sun4i_drv_master_ops,
383 match);
384 else
385 return 0;
386}
387
388static int sun4i_drv_remove(struct platform_device *pdev)
389{
390 component_master_del(&pdev->dev, &sun4i_drv_master_ops);
391
392 return 0;
393}
394
395static const struct of_device_id sun4i_drv_of_table[] = {
396 { .compatible = "allwinner,sun4i-a10-display-engine" },
397 { .compatible = "allwinner,sun5i-a10s-display-engine" },
398 { .compatible = "allwinner,sun5i-a13-display-engine" },
399 { .compatible = "allwinner,sun6i-a31-display-engine" },
400 { .compatible = "allwinner,sun6i-a31s-display-engine" },
401 { .compatible = "allwinner,sun7i-a20-display-engine" },
402 { .compatible = "allwinner,sun8i-a23-display-engine" },
403 { .compatible = "allwinner,sun8i-a33-display-engine" },
404 { .compatible = "allwinner,sun8i-a83t-display-engine" },
405 { .compatible = "allwinner,sun8i-h3-display-engine" },
406 { .compatible = "allwinner,sun8i-r40-display-engine" },
407 { .compatible = "allwinner,sun8i-v3s-display-engine" },
408 { .compatible = "allwinner,sun9i-a80-display-engine" },
409 { .compatible = "allwinner,sun50i-a64-display-engine" },
410 { .compatible = "allwinner,sun50i-h6-display-engine" },
411 { }
412};
413MODULE_DEVICE_TABLE(of, sun4i_drv_of_table);
414
415static struct platform_driver sun4i_drv_platform_driver = {
416 .probe = sun4i_drv_probe,
417 .remove = sun4i_drv_remove,
418 .driver = {
419 .name = "sun4i-drm",
420 .of_match_table = sun4i_drv_of_table,
421 },
422};
423module_platform_driver(sun4i_drv_platform_driver);
424
425MODULE_AUTHOR("Boris Brezillon <boris.brezillon@free-electrons.com>");
426MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
427MODULE_DESCRIPTION("Allwinner A10 Display Engine DRM/KMS Driver");
428MODULE_LICENSE("GPL");
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (C) 2015 Free Electrons
4 * Copyright (C) 2015 NextThing Co
5 *
6 * Maxime Ripard <maxime.ripard@free-electrons.com>
7 */
8
9#include <linux/component.h>
10#include <linux/kfifo.h>
11#include <linux/module.h>
12#include <linux/of_graph.h>
13#include <linux/of_reserved_mem.h>
14#include <linux/platform_device.h>
15
16#include <drm/drm_atomic_helper.h>
17#include <drm/drm_drv.h>
18#include <drm/drm_fb_cma_helper.h>
19#include <drm/drm_fb_helper.h>
20#include <drm/drm_gem_cma_helper.h>
21#include <drm/drm_of.h>
22#include <drm/drm_probe_helper.h>
23#include <drm/drm_vblank.h>
24
25#include "sun4i_drv.h"
26#include "sun4i_frontend.h"
27#include "sun4i_framebuffer.h"
28#include "sun4i_tcon.h"
29#include "sun8i_tcon_top.h"
30
31static int drm_sun4i_gem_dumb_create(struct drm_file *file_priv,
32 struct drm_device *drm,
33 struct drm_mode_create_dumb *args)
34{
35 /* The hardware only allows even pitches for YUV buffers. */
36 args->pitch = ALIGN(DIV_ROUND_UP(args->width * args->bpp, 8), 2);
37
38 return drm_gem_cma_dumb_create_internal(file_priv, drm, args);
39}
40
41DEFINE_DRM_GEM_CMA_FOPS(sun4i_drv_fops);
42
43static struct drm_driver sun4i_drv_driver = {
44 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
45
46 /* Generic Operations */
47 .fops = &sun4i_drv_fops,
48 .name = "sun4i-drm",
49 .desc = "Allwinner sun4i Display Engine",
50 .date = "20150629",
51 .major = 1,
52 .minor = 0,
53
54 /* GEM Operations */
55 DRM_GEM_CMA_DRIVER_OPS_VMAP_WITH_DUMB_CREATE(drm_sun4i_gem_dumb_create),
56};
57
58static int sun4i_drv_bind(struct device *dev)
59{
60 struct drm_device *drm;
61 struct sun4i_drv *drv;
62 int ret;
63
64 drm = drm_dev_alloc(&sun4i_drv_driver, dev);
65 if (IS_ERR(drm))
66 return PTR_ERR(drm);
67
68 drv = devm_kzalloc(dev, sizeof(*drv), GFP_KERNEL);
69 if (!drv) {
70 ret = -ENOMEM;
71 goto free_drm;
72 }
73
74 dev_set_drvdata(dev, drm);
75 drm->dev_private = drv;
76 INIT_LIST_HEAD(&drv->frontend_list);
77 INIT_LIST_HEAD(&drv->engine_list);
78 INIT_LIST_HEAD(&drv->tcon_list);
79
80 ret = of_reserved_mem_device_init(dev);
81 if (ret && ret != -ENODEV) {
82 dev_err(drm->dev, "Couldn't claim our memory region\n");
83 goto free_drm;
84 }
85
86 drm_mode_config_init(drm);
87
88 ret = component_bind_all(drm->dev, drm);
89 if (ret) {
90 dev_err(drm->dev, "Couldn't bind all pipelines components\n");
91 goto cleanup_mode_config;
92 }
93
94 /* drm_vblank_init calls kcalloc, which can fail */
95 ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
96 if (ret)
97 goto cleanup_mode_config;
98
99 drm->irq_enabled = true;
100
101 /* Remove early framebuffers (ie. simplefb) */
102 drm_fb_helper_remove_conflicting_framebuffers(NULL, "sun4i-drm-fb", false);
103
104 sun4i_framebuffer_init(drm);
105
106 /* Enable connectors polling */
107 drm_kms_helper_poll_init(drm);
108
109 ret = drm_dev_register(drm, 0);
110 if (ret)
111 goto finish_poll;
112
113 drm_fbdev_generic_setup(drm, 32);
114
115 return 0;
116
117finish_poll:
118 drm_kms_helper_poll_fini(drm);
119cleanup_mode_config:
120 drm_mode_config_cleanup(drm);
121 of_reserved_mem_device_release(dev);
122free_drm:
123 drm_dev_put(drm);
124 return ret;
125}
126
127static void sun4i_drv_unbind(struct device *dev)
128{
129 struct drm_device *drm = dev_get_drvdata(dev);
130
131 drm_dev_unregister(drm);
132 drm_kms_helper_poll_fini(drm);
133 drm_atomic_helper_shutdown(drm);
134 drm_mode_config_cleanup(drm);
135
136 component_unbind_all(dev, NULL);
137 of_reserved_mem_device_release(dev);
138
139 drm_dev_put(drm);
140}
141
142static const struct component_master_ops sun4i_drv_master_ops = {
143 .bind = sun4i_drv_bind,
144 .unbind = sun4i_drv_unbind,
145};
146
147static bool sun4i_drv_node_is_connector(struct device_node *node)
148{
149 return of_device_is_compatible(node, "hdmi-connector");
150}
151
152static bool sun4i_drv_node_is_frontend(struct device_node *node)
153{
154 return of_device_is_compatible(node, "allwinner,sun4i-a10-display-frontend") ||
155 of_device_is_compatible(node, "allwinner,sun5i-a13-display-frontend") ||
156 of_device_is_compatible(node, "allwinner,sun6i-a31-display-frontend") ||
157 of_device_is_compatible(node, "allwinner,sun7i-a20-display-frontend") ||
158 of_device_is_compatible(node, "allwinner,sun8i-a23-display-frontend") ||
159 of_device_is_compatible(node, "allwinner,sun8i-a33-display-frontend") ||
160 of_device_is_compatible(node, "allwinner,sun9i-a80-display-frontend");
161}
162
163static bool sun4i_drv_node_is_deu(struct device_node *node)
164{
165 return of_device_is_compatible(node, "allwinner,sun9i-a80-deu");
166}
167
168static bool sun4i_drv_node_is_supported_frontend(struct device_node *node)
169{
170 if (IS_ENABLED(CONFIG_DRM_SUN4I_BACKEND))
171 return !!of_match_node(sun4i_frontend_of_table, node);
172
173 return false;
174}
175
176static bool sun4i_drv_node_is_tcon(struct device_node *node)
177{
178 return !!of_match_node(sun4i_tcon_of_table, node);
179}
180
181static bool sun4i_drv_node_is_tcon_with_ch0(struct device_node *node)
182{
183 const struct of_device_id *match;
184
185 match = of_match_node(sun4i_tcon_of_table, node);
186 if (match) {
187 struct sun4i_tcon_quirks *quirks;
188
189 quirks = (struct sun4i_tcon_quirks *)match->data;
190
191 return quirks->has_channel_0;
192 }
193
194 return false;
195}
196
197static bool sun4i_drv_node_is_tcon_top(struct device_node *node)
198{
199 return IS_ENABLED(CONFIG_DRM_SUN8I_TCON_TOP) &&
200 !!of_match_node(sun8i_tcon_top_of_table, node);
201}
202
203static int compare_of(struct device *dev, void *data)
204{
205 DRM_DEBUG_DRIVER("Comparing of node %pOF with %pOF\n",
206 dev->of_node,
207 data);
208
209 return dev->of_node == data;
210}
211
212/*
213 * The encoder drivers use drm_of_find_possible_crtcs to get upstream
214 * crtcs from the device tree using of_graph. For the results to be
215 * correct, encoders must be probed/bound after _all_ crtcs have been
216 * created. The existing code uses a depth first recursive traversal
217 * of the of_graph, which means the encoders downstream of the TCON
218 * get add right after the first TCON. The second TCON or CRTC will
219 * never be properly associated with encoders connected to it.
220 *
221 * Also, in a dual display pipeline setup, both frontends can feed
222 * either backend, and both backends can feed either TCON, we want
223 * all components of the same type to be added before the next type
224 * in the pipeline. Fortunately, the pipelines are perfectly symmetric,
225 * i.e. components of the same type are at the same depth when counted
226 * from the frontend. The only exception is the third pipeline in
227 * the A80 SoC, which we do not support anyway.
228 *
229 * Hence we can use a breadth first search traversal order to add
230 * components. We do not need to check for duplicates. The component
231 * matching system handles this for us.
232 */
233struct endpoint_list {
234 DECLARE_KFIFO(fifo, struct device_node *, 16);
235};
236
237static void sun4i_drv_traverse_endpoints(struct endpoint_list *list,
238 struct device_node *node,
239 int port_id)
240{
241 struct device_node *ep, *remote, *port;
242
243 port = of_graph_get_port_by_id(node, port_id);
244 if (!port) {
245 DRM_DEBUG_DRIVER("No output to bind on port %d\n", port_id);
246 return;
247 }
248
249 for_each_available_child_of_node(port, ep) {
250 remote = of_graph_get_remote_port_parent(ep);
251 if (!remote) {
252 DRM_DEBUG_DRIVER("Error retrieving the output node\n");
253 continue;
254 }
255
256 if (sun4i_drv_node_is_tcon(node)) {
257 /*
258 * TCON TOP is always probed before TCON. However, TCON
259 * points back to TCON TOP when it is source for HDMI.
260 * We have to skip it here to prevent infinite looping
261 * between TCON TOP and TCON.
262 */
263 if (sun4i_drv_node_is_tcon_top(remote)) {
264 DRM_DEBUG_DRIVER("TCON output endpoint is TCON TOP... skipping\n");
265 of_node_put(remote);
266 continue;
267 }
268
269 /*
270 * If the node is our TCON with channel 0, the first
271 * port is used for panel or bridges, and will not be
272 * part of the component framework.
273 */
274 if (sun4i_drv_node_is_tcon_with_ch0(node)) {
275 struct of_endpoint endpoint;
276
277 if (of_graph_parse_endpoint(ep, &endpoint)) {
278 DRM_DEBUG_DRIVER("Couldn't parse endpoint\n");
279 of_node_put(remote);
280 continue;
281 }
282
283 if (!endpoint.id) {
284 DRM_DEBUG_DRIVER("Endpoint is our panel... skipping\n");
285 of_node_put(remote);
286 continue;
287 }
288 }
289 }
290
291 kfifo_put(&list->fifo, remote);
292 }
293}
294
295static int sun4i_drv_add_endpoints(struct device *dev,
296 struct endpoint_list *list,
297 struct component_match **match,
298 struct device_node *node)
299{
300 int count = 0;
301
302 /*
303 * The frontend has been disabled in some of our old device
304 * trees. If we find a node that is the frontend and is
305 * disabled, we should just follow through and parse its
306 * child, but without adding it to the component list.
307 * Otherwise, we obviously want to add it to the list.
308 */
309 if (!sun4i_drv_node_is_frontend(node) &&
310 !of_device_is_available(node))
311 return 0;
312
313 /*
314 * The connectors will be the last nodes in our pipeline, we
315 * can just bail out.
316 */
317 if (sun4i_drv_node_is_connector(node))
318 return 0;
319
320 /*
321 * If the device is either just a regular device, or an
322 * enabled frontend supported by the driver, we add it to our
323 * component list.
324 */
325 if (!(sun4i_drv_node_is_frontend(node) ||
326 sun4i_drv_node_is_deu(node)) ||
327 (sun4i_drv_node_is_supported_frontend(node) &&
328 of_device_is_available(node))) {
329 /* Add current component */
330 DRM_DEBUG_DRIVER("Adding component %pOF\n", node);
331 drm_of_component_match_add(dev, match, compare_of, node);
332 count++;
333 }
334
335 /* each node has at least one output */
336 sun4i_drv_traverse_endpoints(list, node, 1);
337
338 /* TCON TOP has second and third output */
339 if (sun4i_drv_node_is_tcon_top(node)) {
340 sun4i_drv_traverse_endpoints(list, node, 3);
341 sun4i_drv_traverse_endpoints(list, node, 5);
342 }
343
344 return count;
345}
346
347#ifdef CONFIG_PM_SLEEP
348static int sun4i_drv_drm_sys_suspend(struct device *dev)
349{
350 struct drm_device *drm = dev_get_drvdata(dev);
351
352 return drm_mode_config_helper_suspend(drm);
353}
354
355static int sun4i_drv_drm_sys_resume(struct device *dev)
356{
357 struct drm_device *drm = dev_get_drvdata(dev);
358
359 return drm_mode_config_helper_resume(drm);
360}
361#endif
362
363static const struct dev_pm_ops sun4i_drv_drm_pm_ops = {
364 SET_SYSTEM_SLEEP_PM_OPS(sun4i_drv_drm_sys_suspend,
365 sun4i_drv_drm_sys_resume)
366};
367
368static int sun4i_drv_probe(struct platform_device *pdev)
369{
370 struct component_match *match = NULL;
371 struct device_node *np = pdev->dev.of_node, *endpoint;
372 struct endpoint_list list;
373 int i, ret, count = 0;
374
375 INIT_KFIFO(list.fifo);
376
377 for (i = 0;; i++) {
378 struct device_node *pipeline = of_parse_phandle(np,
379 "allwinner,pipelines",
380 i);
381 if (!pipeline)
382 break;
383
384 kfifo_put(&list.fifo, pipeline);
385 }
386
387 while (kfifo_get(&list.fifo, &endpoint)) {
388 /* process this endpoint */
389 ret = sun4i_drv_add_endpoints(&pdev->dev, &list, &match,
390 endpoint);
391
392 /* sun4i_drv_add_endpoints can fail to allocate memory */
393 if (ret < 0)
394 return ret;
395
396 count += ret;
397 }
398
399 if (count)
400 return component_master_add_with_match(&pdev->dev,
401 &sun4i_drv_master_ops,
402 match);
403 else
404 return 0;
405}
406
407static int sun4i_drv_remove(struct platform_device *pdev)
408{
409 component_master_del(&pdev->dev, &sun4i_drv_master_ops);
410
411 return 0;
412}
413
414static const struct of_device_id sun4i_drv_of_table[] = {
415 { .compatible = "allwinner,sun4i-a10-display-engine" },
416 { .compatible = "allwinner,sun5i-a10s-display-engine" },
417 { .compatible = "allwinner,sun5i-a13-display-engine" },
418 { .compatible = "allwinner,sun6i-a31-display-engine" },
419 { .compatible = "allwinner,sun6i-a31s-display-engine" },
420 { .compatible = "allwinner,sun7i-a20-display-engine" },
421 { .compatible = "allwinner,sun8i-a23-display-engine" },
422 { .compatible = "allwinner,sun8i-a33-display-engine" },
423 { .compatible = "allwinner,sun8i-a83t-display-engine" },
424 { .compatible = "allwinner,sun8i-h3-display-engine" },
425 { .compatible = "allwinner,sun8i-r40-display-engine" },
426 { .compatible = "allwinner,sun8i-v3s-display-engine" },
427 { .compatible = "allwinner,sun9i-a80-display-engine" },
428 { .compatible = "allwinner,sun50i-a64-display-engine" },
429 { .compatible = "allwinner,sun50i-h6-display-engine" },
430 { }
431};
432MODULE_DEVICE_TABLE(of, sun4i_drv_of_table);
433
434static struct platform_driver sun4i_drv_platform_driver = {
435 .probe = sun4i_drv_probe,
436 .remove = sun4i_drv_remove,
437 .driver = {
438 .name = "sun4i-drm",
439 .of_match_table = sun4i_drv_of_table,
440 .pm = &sun4i_drv_drm_pm_ops,
441 },
442};
443module_platform_driver(sun4i_drv_platform_driver);
444
445MODULE_AUTHOR("Boris Brezillon <boris.brezillon@free-electrons.com>");
446MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
447MODULE_DESCRIPTION("Allwinner A10 Display Engine DRM/KMS Driver");
448MODULE_LICENSE("GPL");