1
2
3#include <drm/drm_atomic.h>
4#include <drm/drm_atomic_helper.h>
5#include <drm/drm_probe_helper.h>
6#include <drm/drm_vblank.h>
7
8#include "vkms_drv.h"
9
10static enum hrtimer_restart vkms_vblank_simulate(struct hrtimer *timer)
11{
12 struct vkms_output *output = container_of(timer, struct vkms_output,
13 vblank_hrtimer);
14 struct drm_crtc *crtc = &output->crtc;
15 struct vkms_crtc_state *state;
16 u64 ret_overrun;
17 bool ret;
18
19 ret_overrun = hrtimer_forward_now(&output->vblank_hrtimer,
20 output->period_ns);
21 WARN_ON(ret_overrun != 1);
22
23 spin_lock(&output->lock);
24 ret = drm_crtc_handle_vblank(crtc);
25 if (!ret)
26 DRM_ERROR("vkms failure on handling vblank");
27
28 state = output->composer_state;
29 spin_unlock(&output->lock);
30
31 if (state && output->composer_enabled) {
32 u64 frame = drm_crtc_accurate_vblank_count(crtc);
33
34
35
36
37 spin_lock(&output->composer_lock);
38 if (!state->crc_pending)
39 state->frame_start = frame;
40 else
41 DRM_DEBUG_DRIVER("crc worker falling behind, frame_start: %llu, frame_end: %llu\n",
42 state->frame_start, frame);
43 state->frame_end = frame;
44 state->crc_pending = true;
45 spin_unlock(&output->composer_lock);
46
47 ret = queue_work(output->composer_workq, &state->composer_work);
48 if (!ret)
49 DRM_DEBUG_DRIVER("Composer worker already queued\n");
50 }
51
52 return HRTIMER_RESTART;
53}
54
55static int vkms_enable_vblank(struct drm_crtc *crtc)
56{
57 struct drm_device *dev = crtc->dev;
58 unsigned int pipe = drm_crtc_index(crtc);
59 struct drm_vblank_crtc *vblank = &dev->vblank[pipe];
60 struct vkms_output *out = drm_crtc_to_vkms_output(crtc);
61
62 drm_calc_timestamping_constants(crtc, &crtc->mode);
63
64 hrtimer_init(&out->vblank_hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
65 out->vblank_hrtimer.function = &vkms_vblank_simulate;
66 out->period_ns = ktime_set(0, vblank->framedur_ns);
67 hrtimer_start(&out->vblank_hrtimer, out->period_ns, HRTIMER_MODE_REL);
68
69 return 0;
70}
71
72static void vkms_disable_vblank(struct drm_crtc *crtc)
73{
74 struct vkms_output *out = drm_crtc_to_vkms_output(crtc);
75
76 hrtimer_cancel(&out->vblank_hrtimer);
77}
78
79static bool vkms_get_vblank_timestamp(struct drm_crtc *crtc,
80 int *max_error, ktime_t *vblank_time,
81 bool in_vblank_irq)
82{
83 struct drm_device *dev = crtc->dev;
84 unsigned int pipe = crtc->index;
85 struct vkms_device *vkmsdev = drm_device_to_vkms_device(dev);
86 struct vkms_output *output = &vkmsdev->output;
87 struct drm_vblank_crtc *vblank = &dev->vblank[pipe];
88
89 *vblank_time = READ_ONCE(output->vblank_hrtimer.node.expires);
90
91 if (WARN_ON(*vblank_time == vblank->time))
92 return true;
93
94
95
96
97
98
99
100
101 *vblank_time -= output->period_ns;
102
103 return true;
104}
105
106static struct drm_crtc_state *
107vkms_atomic_crtc_duplicate_state(struct drm_crtc *crtc)
108{
109 struct vkms_crtc_state *vkms_state;
110
111 if (WARN_ON(!crtc->state))
112 return NULL;
113
114 vkms_state = kzalloc(sizeof(*vkms_state), GFP_KERNEL);
115 if (!vkms_state)
116 return NULL;
117
118 __drm_atomic_helper_crtc_duplicate_state(crtc, &vkms_state->base);
119
120 INIT_WORK(&vkms_state->composer_work, vkms_composer_worker);
121
122 return &vkms_state->base;
123}
124
125static void vkms_atomic_crtc_destroy_state(struct drm_crtc *crtc,
126 struct drm_crtc_state *state)
127{
128 struct vkms_crtc_state *vkms_state = to_vkms_crtc_state(state);
129
130 __drm_atomic_helper_crtc_destroy_state(state);
131
132 WARN_ON(work_pending(&vkms_state->composer_work));
133 kfree(vkms_state->active_planes);
134 kfree(vkms_state);
135}
136
137static void vkms_atomic_crtc_reset(struct drm_crtc *crtc)
138{
139 struct vkms_crtc_state *vkms_state =
140 kzalloc(sizeof(*vkms_state), GFP_KERNEL);
141
142 if (crtc->state)
143 vkms_atomic_crtc_destroy_state(crtc, crtc->state);
144
145 __drm_atomic_helper_crtc_reset(crtc, &vkms_state->base);
146 if (vkms_state)
147 INIT_WORK(&vkms_state->composer_work, vkms_composer_worker);
148}
149
150static const struct drm_crtc_funcs vkms_crtc_funcs = {
151 .set_config = drm_atomic_helper_set_config,
152 .destroy = drm_crtc_cleanup,
153 .page_flip = drm_atomic_helper_page_flip,
154 .reset = vkms_atomic_crtc_reset,
155 .atomic_duplicate_state = vkms_atomic_crtc_duplicate_state,
156 .atomic_destroy_state = vkms_atomic_crtc_destroy_state,
157 .enable_vblank = vkms_enable_vblank,
158 .disable_vblank = vkms_disable_vblank,
159 .get_vblank_timestamp = vkms_get_vblank_timestamp,
160 .get_crc_sources = vkms_get_crc_sources,
161 .set_crc_source = vkms_set_crc_source,
162 .verify_crc_source = vkms_verify_crc_source,
163};
164
165static int vkms_crtc_atomic_check(struct drm_crtc *crtc,
166 struct drm_crtc_state *state)
167{
168 struct vkms_crtc_state *vkms_state = to_vkms_crtc_state(state);
169 struct drm_plane *plane;
170 struct drm_plane_state *plane_state;
171 int i = 0, ret;
172
173 if (vkms_state->active_planes)
174 return 0;
175
176 ret = drm_atomic_add_affected_planes(state->state, crtc);
177 if (ret < 0)
178 return ret;
179
180 drm_for_each_plane_mask(plane, crtc->dev, state->plane_mask) {
181 plane_state = drm_atomic_get_existing_plane_state(state->state,
182 plane);
183 WARN_ON(!plane_state);
184
185 if (!plane_state->visible)
186 continue;
187
188 i++;
189 }
190
191 vkms_state->active_planes = kcalloc(i, sizeof(plane), GFP_KERNEL);
192 if (!vkms_state->active_planes)
193 return -ENOMEM;
194 vkms_state->num_active_planes = i;
195
196 i = 0;
197 drm_for_each_plane_mask(plane, crtc->dev, state->plane_mask) {
198 plane_state = drm_atomic_get_existing_plane_state(state->state,
199 plane);
200
201 if (!plane_state->visible)
202 continue;
203
204 vkms_state->active_planes[i++] =
205 to_vkms_plane_state(plane_state);
206 }
207
208 return 0;
209}
210
211static void vkms_crtc_atomic_enable(struct drm_crtc *crtc,
212 struct drm_crtc_state *old_state)
213{
214 drm_crtc_vblank_on(crtc);
215}
216
217static void vkms_crtc_atomic_disable(struct drm_crtc *crtc,
218 struct drm_crtc_state *old_state)
219{
220 drm_crtc_vblank_off(crtc);
221}
222
223static void vkms_crtc_atomic_begin(struct drm_crtc *crtc,
224 struct drm_crtc_state *old_crtc_state)
225{
226 struct vkms_output *vkms_output = drm_crtc_to_vkms_output(crtc);
227
228
229
230
231 spin_lock_irq(&vkms_output->lock);
232}
233
234static void vkms_crtc_atomic_flush(struct drm_crtc *crtc,
235 struct drm_crtc_state *old_crtc_state)
236{
237 struct vkms_output *vkms_output = drm_crtc_to_vkms_output(crtc);
238
239 if (crtc->state->event) {
240 spin_lock(&crtc->dev->event_lock);
241
242 if (drm_crtc_vblank_get(crtc) != 0)
243 drm_crtc_send_vblank_event(crtc, crtc->state->event);
244 else
245 drm_crtc_arm_vblank_event(crtc, crtc->state->event);
246
247 spin_unlock(&crtc->dev->event_lock);
248
249 crtc->state->event = NULL;
250 }
251
252 vkms_output->composer_state = to_vkms_crtc_state(crtc->state);
253
254 spin_unlock_irq(&vkms_output->lock);
255}
256
257static const struct drm_crtc_helper_funcs vkms_crtc_helper_funcs = {
258 .atomic_check = vkms_crtc_atomic_check,
259 .atomic_begin = vkms_crtc_atomic_begin,
260 .atomic_flush = vkms_crtc_atomic_flush,
261 .atomic_enable = vkms_crtc_atomic_enable,
262 .atomic_disable = vkms_crtc_atomic_disable,
263};
264
265int vkms_crtc_init(struct drm_device *dev, struct drm_crtc *crtc,
266 struct drm_plane *primary, struct drm_plane *cursor)
267{
268 struct vkms_output *vkms_out = drm_crtc_to_vkms_output(crtc);
269 int ret;
270
271 ret = drm_crtc_init_with_planes(dev, crtc, primary, cursor,
272 &vkms_crtc_funcs, NULL);
273 if (ret) {
274 DRM_ERROR("Failed to init CRTC\n");
275 return ret;
276 }
277
278 drm_crtc_helper_add(crtc, &vkms_crtc_helper_funcs);
279
280 spin_lock_init(&vkms_out->lock);
281 spin_lock_init(&vkms_out->composer_lock);
282
283 vkms_out->composer_workq = alloc_ordered_workqueue("vkms_composer", 0);
284 if (!vkms_out->composer_workq)
285 return -ENOMEM;
286
287 return ret;
288}
289
