1 /*
2 * Copyright (C) STMicroelectronics SA 2014
3 * Authors: Benjamin Gaignard <benjamin.gaignard@st.com>
4 * Fabien Dessenne <fabien.dessenne@st.com>
5 * for STMicroelectronics.
6 * License terms: GNU General Public License (GPL), version 2
7 */
8
9 #include <linux/clk.h>
10
11 #include <drm/drmP.h>
12 #include <drm/drm_atomic.h>
13 #include <drm/drm_atomic_helper.h>
14 #include <drm/drm_crtc_helper.h>
15 #include <drm/drm_plane_helper.h>
16
17 #include "sti_compositor.h"
18 #include "sti_drm_drv.h"
19 #include "sti_drm_crtc.h"
20 #include "sti_vtg.h"
21
sti_drm_crtc_dpms(struct drm_crtc * crtc,int mode)22 static void sti_drm_crtc_dpms(struct drm_crtc *crtc, int mode)
23 {
24 DRM_DEBUG_KMS("\n");
25 }
26
sti_drm_crtc_prepare(struct drm_crtc * crtc)27 static void sti_drm_crtc_prepare(struct drm_crtc *crtc)
28 {
29 struct sti_mixer *mixer = to_sti_mixer(crtc);
30 struct device *dev = mixer->dev;
31 struct sti_compositor *compo = dev_get_drvdata(dev);
32
33 mixer->enabled = true;
34
35 /* Prepare and enable the compo IP clock */
36 if (mixer->id == STI_MIXER_MAIN) {
37 if (clk_prepare_enable(compo->clk_compo_main))
38 DRM_INFO("Failed to prepare/enable compo_main clk\n");
39 } else {
40 if (clk_prepare_enable(compo->clk_compo_aux))
41 DRM_INFO("Failed to prepare/enable compo_aux clk\n");
42 }
43
44 sti_mixer_clear_all_layers(mixer);
45 }
46
sti_drm_crtc_commit(struct drm_crtc * crtc)47 static void sti_drm_crtc_commit(struct drm_crtc *crtc)
48 {
49 struct sti_mixer *mixer = to_sti_mixer(crtc);
50 struct device *dev = mixer->dev;
51 struct sti_compositor *compo = dev_get_drvdata(dev);
52 struct sti_layer *layer;
53
54 if ((!mixer || !compo)) {
55 DRM_ERROR("Can not find mixer or compositor)\n");
56 return;
57 }
58
59 /* get GDP which is reserved to the CRTC FB */
60 layer = to_sti_layer(crtc->primary);
61 if (layer)
62 sti_layer_commit(layer);
63 else
64 DRM_ERROR("Can not find CRTC dedicated plane (GDP0)\n");
65
66 /* Enable layer on mixer */
67 if (sti_mixer_set_layer_status(mixer, layer, true))
68 DRM_ERROR("Can not enable layer at mixer\n");
69
70 drm_crtc_vblank_on(crtc);
71 }
72
sti_drm_crtc_mode_fixup(struct drm_crtc * crtc,const struct drm_display_mode * mode,struct drm_display_mode * adjusted_mode)73 static bool sti_drm_crtc_mode_fixup(struct drm_crtc *crtc,
74 const struct drm_display_mode *mode,
75 struct drm_display_mode *adjusted_mode)
76 {
77 /* accept the provided drm_display_mode, do not fix it up */
78 return true;
79 }
80
81 static int
sti_drm_crtc_mode_set(struct drm_crtc * crtc,struct drm_display_mode * mode)82 sti_drm_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode)
83 {
84 struct sti_mixer *mixer = to_sti_mixer(crtc);
85 struct device *dev = mixer->dev;
86 struct sti_compositor *compo = dev_get_drvdata(dev);
87 struct clk *clk;
88 int rate = mode->clock * 1000;
89 int res;
90
91 DRM_DEBUG_KMS("CRTC:%d (%s) mode:%d (%s)\n",
92 crtc->base.id, sti_mixer_to_str(mixer),
93 mode->base.id, mode->name);
94
95 DRM_DEBUG_KMS("%d %d %d %d %d %d %d %d %d %d 0x%x 0x%x\n",
96 mode->vrefresh, mode->clock,
97 mode->hdisplay,
98 mode->hsync_start, mode->hsync_end,
99 mode->htotal,
100 mode->vdisplay,
101 mode->vsync_start, mode->vsync_end,
102 mode->vtotal, mode->type, mode->flags);
103
104 /* Set rate and prepare/enable pixel clock */
105 if (mixer->id == STI_MIXER_MAIN)
106 clk = compo->clk_pix_main;
107 else
108 clk = compo->clk_pix_aux;
109
110 res = clk_set_rate(clk, rate);
111 if (res < 0) {
112 DRM_ERROR("Cannot set rate (%dHz) for pix clk\n", rate);
113 return -EINVAL;
114 }
115 if (clk_prepare_enable(clk)) {
116 DRM_ERROR("Failed to prepare/enable pix clk\n");
117 return -EINVAL;
118 }
119
120 sti_vtg_set_config(mixer->id == STI_MIXER_MAIN ?
121 compo->vtg_main : compo->vtg_aux, &crtc->mode);
122
123 res = sti_mixer_active_video_area(mixer, &crtc->mode);
124 if (res) {
125 DRM_ERROR("Can not set active video area\n");
126 return -EINVAL;
127 }
128
129 return res;
130 }
131
sti_drm_crtc_disable(struct drm_crtc * crtc)132 static void sti_drm_crtc_disable(struct drm_crtc *crtc)
133 {
134 struct sti_mixer *mixer = to_sti_mixer(crtc);
135 struct device *dev = mixer->dev;
136 struct sti_compositor *compo = dev_get_drvdata(dev);
137
138 if (!mixer->enabled)
139 return;
140
141 DRM_DEBUG_KMS("CRTC:%d (%s)\n", crtc->base.id, sti_mixer_to_str(mixer));
142
143 /* Disable Background */
144 sti_mixer_set_background_status(mixer, false);
145
146 drm_crtc_vblank_off(crtc);
147
148 /* Disable pixel clock and compo IP clocks */
149 if (mixer->id == STI_MIXER_MAIN) {
150 clk_disable_unprepare(compo->clk_pix_main);
151 clk_disable_unprepare(compo->clk_compo_main);
152 } else {
153 clk_disable_unprepare(compo->clk_pix_aux);
154 clk_disable_unprepare(compo->clk_compo_aux);
155 }
156
157 mixer->enabled = false;
158 }
159
160 static void
sti_drm_crtc_mode_set_nofb(struct drm_crtc * crtc)161 sti_drm_crtc_mode_set_nofb(struct drm_crtc *crtc)
162 {
163 sti_drm_crtc_prepare(crtc);
164 sti_drm_crtc_mode_set(crtc, &crtc->state->adjusted_mode);
165 }
166
sti_drm_atomic_begin(struct drm_crtc * crtc)167 static void sti_drm_atomic_begin(struct drm_crtc *crtc)
168 {
169 struct sti_mixer *mixer = to_sti_mixer(crtc);
170
171 if (crtc->state->event) {
172 crtc->state->event->pipe = drm_crtc_index(crtc);
173
174 WARN_ON(drm_crtc_vblank_get(crtc) != 0);
175
176 mixer->pending_event = crtc->state->event;
177 crtc->state->event = NULL;
178 }
179 }
180
sti_drm_atomic_flush(struct drm_crtc * crtc)181 static void sti_drm_atomic_flush(struct drm_crtc *crtc)
182 {
183 }
184
185 static struct drm_crtc_helper_funcs sti_crtc_helper_funcs = {
186 .dpms = sti_drm_crtc_dpms,
187 .prepare = sti_drm_crtc_prepare,
188 .commit = sti_drm_crtc_commit,
189 .mode_fixup = sti_drm_crtc_mode_fixup,
190 .mode_set = drm_helper_crtc_mode_set,
191 .mode_set_nofb = sti_drm_crtc_mode_set_nofb,
192 .mode_set_base = drm_helper_crtc_mode_set_base,
193 .disable = sti_drm_crtc_disable,
194 .atomic_begin = sti_drm_atomic_begin,
195 .atomic_flush = sti_drm_atomic_flush,
196 };
197
sti_drm_crtc_destroy(struct drm_crtc * crtc)198 static void sti_drm_crtc_destroy(struct drm_crtc *crtc)
199 {
200 DRM_DEBUG_KMS("\n");
201 drm_crtc_cleanup(crtc);
202 }
203
sti_drm_crtc_set_property(struct drm_crtc * crtc,struct drm_property * property,uint64_t val)204 static int sti_drm_crtc_set_property(struct drm_crtc *crtc,
205 struct drm_property *property,
206 uint64_t val)
207 {
208 DRM_DEBUG_KMS("\n");
209 return 0;
210 }
211
sti_drm_crtc_vblank_cb(struct notifier_block * nb,unsigned long event,void * data)212 int sti_drm_crtc_vblank_cb(struct notifier_block *nb,
213 unsigned long event, void *data)
214 {
215 struct drm_device *drm_dev;
216 struct sti_compositor *compo =
217 container_of(nb, struct sti_compositor, vtg_vblank_nb);
218 int *crtc = data;
219 unsigned long flags;
220 struct sti_drm_private *priv;
221
222 drm_dev = compo->mixer[*crtc]->drm_crtc.dev;
223 priv = drm_dev->dev_private;
224
225 if ((event != VTG_TOP_FIELD_EVENT) &&
226 (event != VTG_BOTTOM_FIELD_EVENT)) {
227 DRM_ERROR("unknown event: %lu\n", event);
228 return -EINVAL;
229 }
230
231 drm_handle_vblank(drm_dev, *crtc);
232
233 spin_lock_irqsave(&drm_dev->event_lock, flags);
234 if (compo->mixer[*crtc]->pending_event) {
235 drm_send_vblank_event(drm_dev, -1,
236 compo->mixer[*crtc]->pending_event);
237 drm_vblank_put(drm_dev, *crtc);
238 compo->mixer[*crtc]->pending_event = NULL;
239 }
240 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
241
242 return 0;
243 }
244
sti_drm_crtc_enable_vblank(struct drm_device * dev,int crtc)245 int sti_drm_crtc_enable_vblank(struct drm_device *dev, int crtc)
246 {
247 struct sti_drm_private *dev_priv = dev->dev_private;
248 struct sti_compositor *compo = dev_priv->compo;
249 struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb;
250
251 if (sti_vtg_register_client(crtc == STI_MIXER_MAIN ?
252 compo->vtg_main : compo->vtg_aux,
253 vtg_vblank_nb, crtc)) {
254 DRM_ERROR("Cannot register VTG notifier\n");
255 return -EINVAL;
256 }
257
258 return 0;
259 }
260 EXPORT_SYMBOL(sti_drm_crtc_enable_vblank);
261
sti_drm_crtc_disable_vblank(struct drm_device * dev,int crtc)262 void sti_drm_crtc_disable_vblank(struct drm_device *dev, int crtc)
263 {
264 struct sti_drm_private *priv = dev->dev_private;
265 struct sti_compositor *compo = priv->compo;
266 struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb;
267
268 DRM_DEBUG_DRIVER("\n");
269
270 if (sti_vtg_unregister_client(crtc == STI_MIXER_MAIN ?
271 compo->vtg_main : compo->vtg_aux, vtg_vblank_nb))
272 DRM_DEBUG_DRIVER("Warning: cannot unregister VTG notifier\n");
273
274 /* free the resources of the pending requests */
275 if (compo->mixer[crtc]->pending_event) {
276 drm_vblank_put(dev, crtc);
277 compo->mixer[crtc]->pending_event = NULL;
278 }
279 }
280 EXPORT_SYMBOL(sti_drm_crtc_disable_vblank);
281
282 static struct drm_crtc_funcs sti_crtc_funcs = {
283 .set_config = drm_atomic_helper_set_config,
284 .page_flip = drm_atomic_helper_page_flip,
285 .destroy = sti_drm_crtc_destroy,
286 .set_property = sti_drm_crtc_set_property,
287 .reset = drm_atomic_helper_crtc_reset,
288 .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
289 .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
290 };
291
sti_drm_crtc_is_main(struct drm_crtc * crtc)292 bool sti_drm_crtc_is_main(struct drm_crtc *crtc)
293 {
294 struct sti_mixer *mixer = to_sti_mixer(crtc);
295
296 if (mixer->id == STI_MIXER_MAIN)
297 return true;
298
299 return false;
300 }
301 EXPORT_SYMBOL(sti_drm_crtc_is_main);
302
sti_drm_crtc_init(struct drm_device * drm_dev,struct sti_mixer * mixer,struct drm_plane * primary,struct drm_plane * cursor)303 int sti_drm_crtc_init(struct drm_device *drm_dev, struct sti_mixer *mixer,
304 struct drm_plane *primary, struct drm_plane *cursor)
305 {
306 struct drm_crtc *crtc = &mixer->drm_crtc;
307 int res;
308
309 res = drm_crtc_init_with_planes(drm_dev, crtc, primary, cursor,
310 &sti_crtc_funcs);
311 if (res) {
312 DRM_ERROR("Can not initialze CRTC\n");
313 return -EINVAL;
314 }
315
316 drm_crtc_helper_add(crtc, &sti_crtc_helper_funcs);
317
318 DRM_DEBUG_DRIVER("drm CRTC:%d mapped to %s\n",
319 crtc->base.id, sti_mixer_to_str(mixer));
320
321 return 0;
322 }
323