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