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6
7#include <drm/drmP.h>
8
9#include <linux/component.h>
10#include <linux/debugfs.h>
11#include <linux/kernel.h>
12#include <linux/module.h>
13#include <linux/of_platform.h>
14
15#include <drm/drm_atomic.h>
16#include <drm/drm_atomic_helper.h>
17#include <drm/drm_crtc_helper.h>
18#include <drm/drm_gem_cma_helper.h>
19#include <drm/drm_fb_cma_helper.h>
20#include <drm/drm_of.h>
21
22#include "sti_crtc.h"
23#include "sti_drv.h"
24#include "sti_plane.h"
25
26#define DRIVER_NAME "sti"
27#define DRIVER_DESC "STMicroelectronics SoC DRM"
28#define DRIVER_DATE "20140601"
29#define DRIVER_MAJOR 1
30#define DRIVER_MINOR 0
31
32#define STI_MAX_FB_HEIGHT 4096
33#define STI_MAX_FB_WIDTH 4096
34
35static int sti_drm_fps_get(void *data, u64 *val)
36{
37 struct drm_device *drm_dev = data;
38 struct drm_plane *p;
39 unsigned int i = 0;
40
41 *val = 0;
42 list_for_each_entry(p, &drm_dev->mode_config.plane_list, head) {
43 struct sti_plane *plane = to_sti_plane(p);
44
45 *val |= plane->fps_info.output << i;
46 i++;
47 }
48
49 return 0;
50}
51
52static int sti_drm_fps_set(void *data, u64 val)
53{
54 struct drm_device *drm_dev = data;
55 struct drm_plane *p;
56 unsigned int i = 0;
57
58 list_for_each_entry(p, &drm_dev->mode_config.plane_list, head) {
59 struct sti_plane *plane = to_sti_plane(p);
60
61 memset(&plane->fps_info, 0, sizeof(plane->fps_info));
62 plane->fps_info.output = (val >> i) & 1;
63
64 i++;
65 }
66
67 return 0;
68}
69
70DEFINE_SIMPLE_ATTRIBUTE(sti_drm_fps_fops,
71 sti_drm_fps_get, sti_drm_fps_set, "%llu\n");
72
73static int sti_drm_fps_dbg_show(struct seq_file *s, void *data)
74{
75 struct drm_info_node *node = s->private;
76 struct drm_device *dev = node->minor->dev;
77 struct drm_plane *p;
78
79 list_for_each_entry(p, &dev->mode_config.plane_list, head) {
80 struct sti_plane *plane = to_sti_plane(p);
81
82 seq_printf(s, "%s%s\n",
83 plane->fps_info.fps_str,
84 plane->fps_info.fips_str);
85 }
86
87 return 0;
88}
89
90static struct drm_info_list sti_drm_dbg_list[] = {
91 {"fps_get", sti_drm_fps_dbg_show, 0},
92};
93
94static int sti_drm_dbg_init(struct drm_minor *minor)
95{
96 struct dentry *dentry;
97 int ret;
98
99 ret = drm_debugfs_create_files(sti_drm_dbg_list,
100 ARRAY_SIZE(sti_drm_dbg_list),
101 minor->debugfs_root, minor);
102 if (ret)
103 goto err;
104
105 dentry = debugfs_create_file("fps_show", S_IRUGO | S_IWUSR,
106 minor->debugfs_root, minor->dev,
107 &sti_drm_fps_fops);
108 if (!dentry) {
109 ret = -ENOMEM;
110 goto err;
111 }
112
113 DRM_INFO("%s: debugfs installed\n", DRIVER_NAME);
114 return 0;
115err:
116 DRM_ERROR("%s: cannot install debugfs\n", DRIVER_NAME);
117 return ret;
118}
119
120static int sti_atomic_check(struct drm_device *dev,
121 struct drm_atomic_state *state)
122{
123 int ret;
124
125 ret = drm_atomic_helper_check_modeset(dev, state);
126 if (ret)
127 return ret;
128
129 ret = drm_atomic_normalize_zpos(dev, state);
130 if (ret)
131 return ret;
132
133 ret = drm_atomic_helper_check_planes(dev, state);
134 if (ret)
135 return ret;
136
137 return ret;
138}
139
140static void sti_output_poll_changed(struct drm_device *ddev)
141{
142 struct sti_private *private = ddev->dev_private;
143
144 drm_fbdev_cma_hotplug_event(private->fbdev);
145}
146
147static const struct drm_mode_config_funcs sti_mode_config_funcs = {
148 .fb_create = drm_fb_cma_create,
149 .output_poll_changed = sti_output_poll_changed,
150 .atomic_check = sti_atomic_check,
151 .atomic_commit = drm_atomic_helper_commit,
152};
153
154static void sti_mode_config_init(struct drm_device *dev)
155{
156 dev->mode_config.min_width = 0;
157 dev->mode_config.min_height = 0;
158
159
160
161
162
163
164 dev->mode_config.max_width = STI_MAX_FB_WIDTH;
165 dev->mode_config.max_height = STI_MAX_FB_HEIGHT;
166
167 dev->mode_config.funcs = &sti_mode_config_funcs;
168}
169
170DEFINE_DRM_GEM_CMA_FOPS(sti_driver_fops);
171
172static struct drm_driver sti_driver = {
173 .driver_features = DRIVER_MODESET |
174 DRIVER_GEM | DRIVER_PRIME | DRIVER_ATOMIC,
175 .gem_free_object_unlocked = drm_gem_cma_free_object,
176 .gem_vm_ops = &drm_gem_cma_vm_ops,
177 .dumb_create = drm_gem_cma_dumb_create,
178 .fops = &sti_driver_fops,
179
180 .enable_vblank = sti_crtc_enable_vblank,
181 .disable_vblank = sti_crtc_disable_vblank,
182
183 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
184 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
185 .gem_prime_export = drm_gem_prime_export,
186 .gem_prime_import = drm_gem_prime_import,
187 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
188 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
189 .gem_prime_vmap = drm_gem_cma_prime_vmap,
190 .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
191 .gem_prime_mmap = drm_gem_cma_prime_mmap,
192
193 .debugfs_init = sti_drm_dbg_init,
194
195 .name = DRIVER_NAME,
196 .desc = DRIVER_DESC,
197 .date = DRIVER_DATE,
198 .major = DRIVER_MAJOR,
199 .minor = DRIVER_MINOR,
200};
201
202static int compare_of(struct device *dev, void *data)
203{
204 return dev->of_node == data;
205}
206
207static int sti_init(struct drm_device *ddev)
208{
209 struct sti_private *private;
210
211 private = kzalloc(sizeof(*private), GFP_KERNEL);
212 if (!private)
213 return -ENOMEM;
214
215 ddev->dev_private = (void *)private;
216 dev_set_drvdata(ddev->dev, ddev);
217 private->drm_dev = ddev;
218
219 drm_mode_config_init(ddev);
220
221 sti_mode_config_init(ddev);
222
223 drm_kms_helper_poll_init(ddev);
224
225 return 0;
226}
227
228static void sti_cleanup(struct drm_device *ddev)
229{
230 struct sti_private *private = ddev->dev_private;
231
232 if (private->fbdev) {
233 drm_fbdev_cma_fini(private->fbdev);
234 private->fbdev = NULL;
235 }
236
237 drm_kms_helper_poll_fini(ddev);
238 component_unbind_all(ddev->dev, ddev);
239 kfree(private);
240 ddev->dev_private = NULL;
241}
242
243static int sti_bind(struct device *dev)
244{
245 struct drm_device *ddev;
246 struct sti_private *private;
247 struct drm_fbdev_cma *fbdev;
248 int ret;
249
250 ddev = drm_dev_alloc(&sti_driver, dev);
251 if (IS_ERR(ddev))
252 return PTR_ERR(ddev);
253
254 ret = sti_init(ddev);
255 if (ret)
256 goto err_drm_dev_unref;
257
258 ret = component_bind_all(ddev->dev, ddev);
259 if (ret)
260 goto err_cleanup;
261
262 ret = drm_dev_register(ddev, 0);
263 if (ret)
264 goto err_register;
265
266 drm_mode_config_reset(ddev);
267
268 private = ddev->dev_private;
269 if (ddev->mode_config.num_connector) {
270 fbdev = drm_fbdev_cma_init(ddev, 32,
271 ddev->mode_config.num_connector);
272 if (IS_ERR(fbdev)) {
273 DRM_DEBUG_DRIVER("Warning: fails to create fbdev\n");
274 fbdev = NULL;
275 }
276 private->fbdev = fbdev;
277 }
278
279 return 0;
280
281err_register:
282 drm_mode_config_cleanup(ddev);
283err_cleanup:
284 sti_cleanup(ddev);
285err_drm_dev_unref:
286 drm_dev_unref(ddev);
287 return ret;
288}
289
290static void sti_unbind(struct device *dev)
291{
292 struct drm_device *ddev = dev_get_drvdata(dev);
293
294 drm_dev_unregister(ddev);
295 sti_cleanup(ddev);
296 drm_dev_unref(ddev);
297}
298
299static const struct component_master_ops sti_ops = {
300 .bind = sti_bind,
301 .unbind = sti_unbind,
302};
303
304static int sti_platform_probe(struct platform_device *pdev)
305{
306 struct device *dev = &pdev->dev;
307 struct device_node *node = dev->of_node;
308 struct device_node *child_np;
309 struct component_match *match = NULL;
310
311 dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
312
313 devm_of_platform_populate(dev);
314
315 child_np = of_get_next_available_child(node, NULL);
316
317 while (child_np) {
318 drm_of_component_match_add(dev, &match, compare_of,
319 child_np);
320 child_np = of_get_next_available_child(node, child_np);
321 }
322
323 return component_master_add_with_match(dev, &sti_ops, match);
324}
325
326static int sti_platform_remove(struct platform_device *pdev)
327{
328 component_master_del(&pdev->dev, &sti_ops);
329
330 return 0;
331}
332
333static const struct of_device_id sti_dt_ids[] = {
334 { .compatible = "st,sti-display-subsystem", },
335 { },
336};
337MODULE_DEVICE_TABLE(of, sti_dt_ids);
338
339static struct platform_driver sti_platform_driver = {
340 .probe = sti_platform_probe,
341 .remove = sti_platform_remove,
342 .driver = {
343 .name = DRIVER_NAME,
344 .of_match_table = sti_dt_ids,
345 },
346};
347
348static struct platform_driver * const drivers[] = {
349 &sti_tvout_driver,
350 &sti_hqvdp_driver,
351 &sti_hdmi_driver,
352 &sti_hda_driver,
353 &sti_dvo_driver,
354 &sti_vtg_driver,
355 &sti_compositor_driver,
356 &sti_platform_driver,
357};
358
359static int sti_drm_init(void)
360{
361 return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
362}
363module_init(sti_drm_init);
364
365static void sti_drm_exit(void)
366{
367 platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
368}
369module_exit(sti_drm_exit);
370
371MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
372MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
373MODULE_LICENSE("GPL");
374
