This source file includes following definitions.
- komeda_gem_cma_dumb_create
- komeda_kms_irq_handler
- komeda_kms_commit_tail
- komeda_plane_state_list_add
- komeda_crtc_normalize_zpos
- komeda_kms_check
- komeda_kms_mode_config_init
- komeda_kms_attach
- komeda_kms_detach
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6
7 #include <linux/component.h>
8 #include <linux/interrupt.h>
9
10 #include <drm/drm_atomic.h>
11 #include <drm/drm_atomic_helper.h>
12 #include <drm/drm_drv.h>
13 #include <drm/drm_fb_helper.h>
14 #include <drm/drm_gem_cma_helper.h>
15 #include <drm/drm_gem_framebuffer_helper.h>
16 #include <drm/drm_irq.h>
17 #include <drm/drm_probe_helper.h>
18 #include <drm/drm_vblank.h>
19
20 #include "komeda_dev.h"
21 #include "komeda_framebuffer.h"
22 #include "komeda_kms.h"
23
24 DEFINE_DRM_GEM_CMA_FOPS(komeda_cma_fops);
25
26 static int komeda_gem_cma_dumb_create(struct drm_file *file,
27 struct drm_device *dev,
28 struct drm_mode_create_dumb *args)
29 {
30 struct komeda_dev *mdev = dev->dev_private;
31 u32 pitch = DIV_ROUND_UP(args->width * args->bpp, 8);
32
33 args->pitch = ALIGN(pitch, mdev->chip.bus_width);
34
35 return drm_gem_cma_dumb_create_internal(file, dev, args);
36 }
37
38 static irqreturn_t komeda_kms_irq_handler(int irq, void *data)
39 {
40 struct drm_device *drm = data;
41 struct komeda_dev *mdev = drm->dev_private;
42 struct komeda_kms_dev *kms = to_kdev(drm);
43 struct komeda_events evts;
44 irqreturn_t status;
45 u32 i;
46
47
48 memset(&evts, 0, sizeof(evts));
49 status = mdev->funcs->irq_handler(mdev, &evts);
50
51
52 for (i = 0; i < kms->n_crtcs; i++)
53 komeda_crtc_handle_event(&kms->crtcs[i], &evts);
54
55 return status;
56 }
57
58 static struct drm_driver komeda_kms_driver = {
59 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
60 .lastclose = drm_fb_helper_lastclose,
61 .gem_free_object_unlocked = drm_gem_cma_free_object,
62 .gem_vm_ops = &drm_gem_cma_vm_ops,
63 .dumb_create = komeda_gem_cma_dumb_create,
64 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
65 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
66 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
67 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
68 .gem_prime_vmap = drm_gem_cma_prime_vmap,
69 .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
70 .gem_prime_mmap = drm_gem_cma_prime_mmap,
71 .fops = &komeda_cma_fops,
72 .name = "komeda",
73 .desc = "Arm Komeda Display Processor driver",
74 .date = "20181101",
75 .major = 0,
76 .minor = 1,
77 };
78
79 static void komeda_kms_commit_tail(struct drm_atomic_state *old_state)
80 {
81 struct drm_device *dev = old_state->dev;
82
83 drm_atomic_helper_commit_modeset_disables(dev, old_state);
84
85 drm_atomic_helper_commit_planes(dev, old_state,
86 DRM_PLANE_COMMIT_ACTIVE_ONLY);
87
88 drm_atomic_helper_commit_modeset_enables(dev, old_state);
89
90 drm_atomic_helper_wait_for_flip_done(dev, old_state);
91
92 drm_atomic_helper_commit_hw_done(old_state);
93
94 drm_atomic_helper_cleanup_planes(dev, old_state);
95 }
96
97 static const struct drm_mode_config_helper_funcs komeda_mode_config_helpers = {
98 .atomic_commit_tail = komeda_kms_commit_tail,
99 };
100
101 static int komeda_plane_state_list_add(struct drm_plane_state *plane_st,
102 struct list_head *zorder_list)
103 {
104 struct komeda_plane_state *new = to_kplane_st(plane_st);
105 struct komeda_plane_state *node, *last;
106
107 last = list_empty(zorder_list) ?
108 NULL : list_last_entry(zorder_list, typeof(*last), zlist_node);
109
110
111
112
113
114 if (!last || (new->base.zpos > last->base.zpos)) {
115 list_add_tail(&new->zlist_node, zorder_list);
116 return 0;
117 }
118
119
120 list_for_each_entry(node, zorder_list, zlist_node) {
121 if (new->base.zpos < node->base.zpos) {
122 list_add_tail(&new->zlist_node, &node->zlist_node);
123 break;
124 } else if (node->base.zpos == new->base.zpos) {
125 struct drm_plane *a = node->base.plane;
126 struct drm_plane *b = new->base.plane;
127
128
129
130
131 DRM_DEBUG_ATOMIC("PLANE: %s and PLANE: %s are configured same zpos: %d.\n",
132 a->name, b->name, node->base.zpos);
133 return -EINVAL;
134 }
135 }
136
137 return 0;
138 }
139
140 static int komeda_crtc_normalize_zpos(struct drm_crtc *crtc,
141 struct drm_crtc_state *crtc_st)
142 {
143 struct drm_atomic_state *state = crtc_st->state;
144 struct komeda_crtc *kcrtc = to_kcrtc(crtc);
145 struct komeda_crtc_state *kcrtc_st = to_kcrtc_st(crtc_st);
146 struct komeda_plane_state *kplane_st;
147 struct drm_plane_state *plane_st;
148 struct drm_plane *plane;
149 struct list_head zorder_list;
150 int order = 0, err;
151
152 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] calculating normalized zpos values\n",
153 crtc->base.id, crtc->name);
154
155 INIT_LIST_HEAD(&zorder_list);
156
157
158 drm_for_each_plane_mask(plane, crtc->dev, crtc_st->plane_mask) {
159 plane_st = drm_atomic_get_plane_state(state, plane);
160 if (IS_ERR(plane_st))
161 return PTR_ERR(plane_st);
162
163
164 err = komeda_plane_state_list_add(plane_st, &zorder_list);
165 if (err)
166 return err;
167 }
168
169 kcrtc_st->max_slave_zorder = 0;
170
171 list_for_each_entry(kplane_st, &zorder_list, zlist_node) {
172 plane_st = &kplane_st->base;
173 plane = plane_st->plane;
174
175 plane_st->normalized_zpos = order++;
176
177
178
179
180
181
182 if (to_kplane_st(plane_st)->layer_split)
183 order++;
184
185 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] zpos:%d, normalized zpos: %d\n",
186 plane->base.id, plane->name,
187 plane_st->zpos, plane_st->normalized_zpos);
188
189
190 if (has_bit(drm_plane_index(plane), kcrtc->slave_planes))
191 kcrtc_st->max_slave_zorder =
192 max(plane_st->normalized_zpos,
193 kcrtc_st->max_slave_zorder);
194 }
195
196 crtc_st->zpos_changed = true;
197
198 return 0;
199 }
200
201 static int komeda_kms_check(struct drm_device *dev,
202 struct drm_atomic_state *state)
203 {
204 struct drm_crtc *crtc;
205 struct drm_crtc_state *new_crtc_st;
206 int i, err;
207
208 err = drm_atomic_helper_check_modeset(dev, state);
209 if (err)
210 return err;
211
212
213
214
215
216 for_each_new_crtc_in_state(state, crtc, new_crtc_st, i) {
217 err = drm_atomic_add_affected_planes(state, crtc);
218 if (err)
219 return err;
220
221 err = komeda_crtc_normalize_zpos(crtc, new_crtc_st);
222 if (err)
223 return err;
224 }
225
226 err = drm_atomic_helper_check_planes(dev, state);
227 if (err)
228 return err;
229
230 return 0;
231 }
232
233 static const struct drm_mode_config_funcs komeda_mode_config_funcs = {
234 .fb_create = komeda_fb_create,
235 .atomic_check = komeda_kms_check,
236 .atomic_commit = drm_atomic_helper_commit,
237 };
238
239 static void komeda_kms_mode_config_init(struct komeda_kms_dev *kms,
240 struct komeda_dev *mdev)
241 {
242 struct drm_mode_config *config = &kms->base.mode_config;
243
244 drm_mode_config_init(&kms->base);
245
246 komeda_kms_setup_crtcs(kms, mdev);
247
248
249 config->min_width = 0;
250 config->min_height = 0;
251 config->max_width = 4096;
252 config->max_height = 4096;
253 config->allow_fb_modifiers = true;
254
255 config->funcs = &komeda_mode_config_funcs;
256 config->helper_private = &komeda_mode_config_helpers;
257 }
258
259 struct komeda_kms_dev *komeda_kms_attach(struct komeda_dev *mdev)
260 {
261 struct komeda_kms_dev *kms = kzalloc(sizeof(*kms), GFP_KERNEL);
262 struct drm_device *drm;
263 int err;
264
265 if (!kms)
266 return ERR_PTR(-ENOMEM);
267
268 drm = &kms->base;
269 err = drm_dev_init(drm, &komeda_kms_driver, mdev->dev);
270 if (err)
271 goto free_kms;
272
273 drm->dev_private = mdev;
274
275 komeda_kms_mode_config_init(kms, mdev);
276
277 err = komeda_kms_add_private_objs(kms, mdev);
278 if (err)
279 goto cleanup_mode_config;
280
281 err = komeda_kms_add_planes(kms, mdev);
282 if (err)
283 goto cleanup_mode_config;
284
285 err = drm_vblank_init(drm, kms->n_crtcs);
286 if (err)
287 goto cleanup_mode_config;
288
289 err = komeda_kms_add_crtcs(kms, mdev);
290 if (err)
291 goto cleanup_mode_config;
292
293 err = komeda_kms_add_wb_connectors(kms, mdev);
294 if (err)
295 goto cleanup_mode_config;
296
297 err = component_bind_all(mdev->dev, kms);
298 if (err)
299 goto cleanup_mode_config;
300
301 drm_mode_config_reset(drm);
302
303 err = devm_request_irq(drm->dev, mdev->irq,
304 komeda_kms_irq_handler, IRQF_SHARED,
305 drm->driver->name, drm);
306 if (err)
307 goto free_component_binding;
308
309 err = mdev->funcs->enable_irq(mdev);
310 if (err)
311 goto free_component_binding;
312
313 drm->irq_enabled = true;
314
315 drm_kms_helper_poll_init(drm);
316
317 err = drm_dev_register(drm, 0);
318 if (err)
319 goto free_interrupts;
320
321 return kms;
322
323 free_interrupts:
324 drm_kms_helper_poll_fini(drm);
325 drm->irq_enabled = false;
326 mdev->funcs->disable_irq(mdev);
327 free_component_binding:
328 component_unbind_all(mdev->dev, drm);
329 cleanup_mode_config:
330 drm_mode_config_cleanup(drm);
331 komeda_kms_cleanup_private_objs(kms);
332 drm->dev_private = NULL;
333 drm_dev_put(drm);
334 free_kms:
335 kfree(kms);
336 return ERR_PTR(err);
337 }
338
339 void komeda_kms_detach(struct komeda_kms_dev *kms)
340 {
341 struct drm_device *drm = &kms->base;
342 struct komeda_dev *mdev = drm->dev_private;
343
344 drm_dev_unregister(drm);
345 drm_kms_helper_poll_fini(drm);
346 drm_atomic_helper_shutdown(drm);
347 drm->irq_enabled = false;
348 mdev->funcs->disable_irq(mdev);
349 component_unbind_all(mdev->dev, drm);
350 drm_mode_config_cleanup(drm);
351 komeda_kms_cleanup_private_objs(kms);
352 drm->dev_private = NULL;
353 drm_dev_put(drm);
354 }