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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_crtc.h"
19#include "sti_drv.h"
20#include "sti_vid.h"
21#include "sti_vtg.h"
22
23static void sti_crtc_enable(struct drm_crtc *crtc)
24{
25 struct sti_mixer *mixer = to_sti_mixer(crtc);
26 struct device *dev = mixer->dev;
27 struct sti_compositor *compo = dev_get_drvdata(dev);
28
29 DRM_DEBUG_DRIVER("\n");
30
31 mixer->status = STI_MIXER_READY;
32
33 /* Prepare and enable the compo IP clock */
34 if (mixer->id == STI_MIXER_MAIN) {
35 if (clk_prepare_enable(compo->clk_compo_main))
36 DRM_INFO("Failed to prepare/enable compo_main clk\n");
37 } else {
38 if (clk_prepare_enable(compo->clk_compo_aux))
39 DRM_INFO("Failed to prepare/enable compo_aux clk\n");
40 }
41
42 drm_crtc_vblank_on(crtc);
43}
44
45static void sti_crtc_disabling(struct drm_crtc *crtc)
46{
47 struct sti_mixer *mixer = to_sti_mixer(crtc);
48
49 DRM_DEBUG_DRIVER("\n");
50
51 mixer->status = STI_MIXER_DISABLING;
52}
53
54static bool sti_crtc_mode_fixup(struct drm_crtc *crtc,
55 const struct drm_display_mode *mode,
56 struct drm_display_mode *adjusted_mode)
57{
58 /* accept the provided drm_display_mode, do not fix it up */
59 drm_mode_set_crtcinfo(adjusted_mode, CRTC_INTERLACE_HALVE_V);
60 return true;
61}
62
63static int
64sti_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode)
65{
66 struct sti_mixer *mixer = to_sti_mixer(crtc);
67 struct device *dev = mixer->dev;
68 struct sti_compositor *compo = dev_get_drvdata(dev);
69 struct clk *clk;
70 int rate = mode->clock * 1000;
71 int res;
72
73 DRM_DEBUG_KMS("CRTC:%d (%s) mode:%d (%s)\n",
74 crtc->base.id, sti_mixer_to_str(mixer),
75 mode->base.id, mode->name);
76
77 DRM_DEBUG_KMS("%d %d %d %d %d %d %d %d %d %d 0x%x 0x%x\n",
78 mode->vrefresh, mode->clock,
79 mode->hdisplay,
80 mode->hsync_start, mode->hsync_end,
81 mode->htotal,
82 mode->vdisplay,
83 mode->vsync_start, mode->vsync_end,
84 mode->vtotal, mode->type, mode->flags);
85
86 /* Set rate and prepare/enable pixel clock */
87 if (mixer->id == STI_MIXER_MAIN)
88 clk = compo->clk_pix_main;
89 else
90 clk = compo->clk_pix_aux;
91
92 res = clk_set_rate(clk, rate);
93 if (res < 0) {
94 DRM_ERROR("Cannot set rate (%dHz) for pix clk\n", rate);
95 return -EINVAL;
96 }
97 if (clk_prepare_enable(clk)) {
98 DRM_ERROR("Failed to prepare/enable pix clk\n");
99 return -EINVAL;
100 }
101
102 sti_vtg_set_config(mixer->id == STI_MIXER_MAIN ?
103 compo->vtg_main : compo->vtg_aux, &crtc->mode);
104
105 res = sti_mixer_active_video_area(mixer, &crtc->mode);
106 if (res) {
107 DRM_ERROR("Can't set active video area\n");
108 return -EINVAL;
109 }
110
111 return res;
112}
113
114static void sti_crtc_disable(struct drm_crtc *crtc)
115{
116 struct sti_mixer *mixer = to_sti_mixer(crtc);
117 struct device *dev = mixer->dev;
118 struct sti_compositor *compo = dev_get_drvdata(dev);
119
120 DRM_DEBUG_KMS("CRTC:%d (%s)\n", crtc->base.id, sti_mixer_to_str(mixer));
121
122 /* Disable Background */
123 sti_mixer_set_background_status(mixer, false);
124
125 drm_crtc_vblank_off(crtc);
126
127 /* Disable pixel clock and compo IP clocks */
128 if (mixer->id == STI_MIXER_MAIN) {
129 clk_disable_unprepare(compo->clk_pix_main);
130 clk_disable_unprepare(compo->clk_compo_main);
131 } else {
132 clk_disable_unprepare(compo->clk_pix_aux);
133 clk_disable_unprepare(compo->clk_compo_aux);
134 }
135
136 mixer->status = STI_MIXER_DISABLED;
137}
138
139static void
140sti_crtc_mode_set_nofb(struct drm_crtc *crtc)
141{
142 sti_crtc_enable(crtc);
143 sti_crtc_mode_set(crtc, &crtc->state->adjusted_mode);
144}
145
146static void sti_crtc_atomic_begin(struct drm_crtc *crtc,
147 struct drm_crtc_state *old_crtc_state)
148{
149 struct sti_mixer *mixer = to_sti_mixer(crtc);
150
151 if (crtc->state->event) {
152 crtc->state->event->pipe = drm_crtc_index(crtc);
153
154 WARN_ON(drm_crtc_vblank_get(crtc) != 0);
155
156 mixer->pending_event = crtc->state->event;
157 crtc->state->event = NULL;
158 }
159}
160
161static void sti_crtc_atomic_flush(struct drm_crtc *crtc,
162 struct drm_crtc_state *old_crtc_state)
163{
164 struct drm_device *drm_dev = crtc->dev;
165 struct sti_mixer *mixer = to_sti_mixer(crtc);
166 struct sti_compositor *compo = dev_get_drvdata(mixer->dev);
167 struct drm_plane *p;
168
169 DRM_DEBUG_DRIVER("\n");
170
171 /* perform plane actions */
172 list_for_each_entry(p, &drm_dev->mode_config.plane_list, head) {
173 struct sti_plane *plane = to_sti_plane(p);
174
175 switch (plane->status) {
176 case STI_PLANE_UPDATED:
177 /* update planes tag as updated */
178 DRM_DEBUG_DRIVER("update plane %s\n",
179 sti_plane_to_str(plane));
180
181 if (sti_mixer_set_plane_depth(mixer, plane)) {
182 DRM_ERROR("Cannot set plane %s depth\n",
183 sti_plane_to_str(plane));
184 break;
185 }
186
187 if (sti_mixer_set_plane_status(mixer, plane, true)) {
188 DRM_ERROR("Cannot enable plane %s at mixer\n",
189 sti_plane_to_str(plane));
190 break;
191 }
192
193 /* if plane is HQVDP_0 then commit the vid[0] */
194 if (plane->desc == STI_HQVDP_0)
195 sti_vid_commit(compo->vid[0], p->state);
196
197 plane->status = STI_PLANE_READY;
198
199 break;
200 case STI_PLANE_DISABLING:
201 /* disabling sequence for planes tag as disabling */
202 DRM_DEBUG_DRIVER("disable plane %s from mixer\n",
203 sti_plane_to_str(plane));
204
205 if (sti_mixer_set_plane_status(mixer, plane, false)) {
206 DRM_ERROR("Cannot disable plane %s at mixer\n",
207 sti_plane_to_str(plane));
208 continue;
209 }
210
211 if (plane->desc == STI_CURSOR)
212 /* tag plane status for disabled */
213 plane->status = STI_PLANE_DISABLED;
214 else
215 /* tag plane status for flushing */
216 plane->status = STI_PLANE_FLUSHING;
217
218 /* if plane is HQVDP_0 then disable the vid[0] */
219 if (plane->desc == STI_HQVDP_0)
220 sti_vid_disable(compo->vid[0]);
221
222 break;
223 default:
224 /* Other status case are not handled */
225 break;
226 }
227 }
228}
229
230static const struct drm_crtc_helper_funcs sti_crtc_helper_funcs = {
231 .enable = sti_crtc_enable,
232 .disable = sti_crtc_disabling,
233 .mode_fixup = sti_crtc_mode_fixup,
234 .mode_set = drm_helper_crtc_mode_set,
235 .mode_set_nofb = sti_crtc_mode_set_nofb,
236 .mode_set_base = drm_helper_crtc_mode_set_base,
237 .atomic_begin = sti_crtc_atomic_begin,
238 .atomic_flush = sti_crtc_atomic_flush,
239};
240
241static void sti_crtc_destroy(struct drm_crtc *crtc)
242{
243 DRM_DEBUG_KMS("\n");
244 drm_crtc_cleanup(crtc);
245}
246
247static int sti_crtc_set_property(struct drm_crtc *crtc,
248 struct drm_property *property,
249 uint64_t val)
250{
251 DRM_DEBUG_KMS("\n");
252 return 0;
253}
254
255int sti_crtc_vblank_cb(struct notifier_block *nb,
256 unsigned long event, void *data)
257{
258 struct sti_compositor *compo =
259 container_of(nb, struct sti_compositor, vtg_vblank_nb);
260 struct drm_crtc *crtc = data;
261 struct sti_mixer *mixer;
262 unsigned long flags;
263 struct sti_private *priv;
264 unsigned int pipe;
265
266 priv = crtc->dev->dev_private;
267 pipe = drm_crtc_index(crtc);
268 mixer = compo->mixer[pipe];
269
270 if ((event != VTG_TOP_FIELD_EVENT) &&
271 (event != VTG_BOTTOM_FIELD_EVENT)) {
272 DRM_ERROR("unknown event: %lu\n", event);
273 return -EINVAL;
274 }
275
276 drm_crtc_handle_vblank(crtc);
277
278 spin_lock_irqsave(&crtc->dev->event_lock, flags);
279 if (mixer->pending_event) {
280 drm_crtc_send_vblank_event(crtc, mixer->pending_event);
281 drm_crtc_vblank_put(crtc);
282 mixer->pending_event = NULL;
283 }
284 spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
285
286 if (mixer->status == STI_MIXER_DISABLING) {
287 struct drm_plane *p;
288
289 /* Disable mixer only if all overlay planes (GDP and VDP)
290 * are disabled */
291 list_for_each_entry(p, &crtc->dev->mode_config.plane_list,
292 head) {
293 struct sti_plane *plane = to_sti_plane(p);
294
295 if ((plane->desc & STI_PLANE_TYPE_MASK) <= STI_VDP)
296 if (plane->status != STI_PLANE_DISABLED)
297 return 0;
298 }
299 sti_crtc_disable(crtc);
300 }
301
302 return 0;
303}
304
305int sti_crtc_enable_vblank(struct drm_device *dev, unsigned int pipe)
306{
307 struct sti_private *dev_priv = dev->dev_private;
308 struct sti_compositor *compo = dev_priv->compo;
309 struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb;
310 struct drm_crtc *crtc = &compo->mixer[pipe]->drm_crtc;
311
312 DRM_DEBUG_DRIVER("\n");
313
314 if (sti_vtg_register_client(pipe == STI_MIXER_MAIN ?
315 compo->vtg_main : compo->vtg_aux,
316 vtg_vblank_nb, crtc)) {
317 DRM_ERROR("Cannot register VTG notifier\n");
318 return -EINVAL;
319 }
320
321 return 0;
322}
323
324void sti_crtc_disable_vblank(struct drm_device *drm_dev, unsigned int pipe)
325{
326 struct sti_private *priv = drm_dev->dev_private;
327 struct sti_compositor *compo = priv->compo;
328 struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb;
329 struct drm_crtc *crtc = &compo->mixer[pipe]->drm_crtc;
330
331 DRM_DEBUG_DRIVER("\n");
332
333 if (sti_vtg_unregister_client(pipe == STI_MIXER_MAIN ?
334 compo->vtg_main : compo->vtg_aux, vtg_vblank_nb))
335 DRM_DEBUG_DRIVER("Warning: cannot unregister VTG notifier\n");
336
337 /* free the resources of the pending requests */
338 if (compo->mixer[pipe]->pending_event) {
339 drm_crtc_vblank_put(crtc);
340 compo->mixer[pipe]->pending_event = NULL;
341 }
342}
343
344static const struct drm_crtc_funcs sti_crtc_funcs = {
345 .set_config = drm_atomic_helper_set_config,
346 .page_flip = drm_atomic_helper_page_flip,
347 .destroy = sti_crtc_destroy,
348 .set_property = sti_crtc_set_property,
349 .reset = drm_atomic_helper_crtc_reset,
350 .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
351 .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
352};
353
354bool sti_crtc_is_main(struct drm_crtc *crtc)
355{
356 struct sti_mixer *mixer = to_sti_mixer(crtc);
357
358 if (mixer->id == STI_MIXER_MAIN)
359 return true;
360
361 return false;
362}
363
364int sti_crtc_init(struct drm_device *drm_dev, struct sti_mixer *mixer,
365 struct drm_plane *primary, struct drm_plane *cursor)
366{
367 struct drm_crtc *crtc = &mixer->drm_crtc;
368 int res;
369
370 res = drm_crtc_init_with_planes(drm_dev, crtc, primary, cursor,
371 &sti_crtc_funcs, NULL);
372 if (res) {
373 DRM_ERROR("Can't initialze CRTC\n");
374 return -EINVAL;
375 }
376
377 drm_crtc_helper_add(crtc, &sti_crtc_helper_funcs);
378
379 DRM_DEBUG_DRIVER("drm CRTC:%d mapped to %s\n",
380 crtc->base.id, sti_mixer_to_str(mixer));
381
382 return 0;
383}