1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) STMicroelectronics SA 2014
4 * Authors: Benjamin Gaignard <benjamin.gaignard@st.com>
5 * Fabien Dessenne <fabien.dessenne@st.com>
6 * for STMicroelectronics.
7 */
8
9#include <linux/clk.h>
10
11#include <drm/drm_atomic.h>
12#include <drm/drm_atomic_helper.h>
13#include <drm/drm_device.h>
14#include <drm/drm_print.h>
15#include <drm/drm_probe_helper.h>
16#include <drm/drm_vblank.h>
17
18#include "sti_compositor.h"
19#include "sti_crtc.h"
20#include "sti_drv.h"
21#include "sti_vid.h"
22#include "sti_vtg.h"
23
24static void sti_crtc_atomic_enable(struct drm_crtc *crtc,
25 struct drm_atomic_state *state)
26{
27 struct sti_mixer *mixer = to_sti_mixer(crtc);
28
29 DRM_DEBUG_DRIVER("\n");
30
31 mixer->status = STI_MIXER_READY;
32
33 drm_crtc_vblank_on(crtc);
34}
35
36static void sti_crtc_atomic_disable(struct drm_crtc *crtc,
37 struct drm_atomic_state *state)
38{
39 struct sti_mixer *mixer = to_sti_mixer(crtc);
40
41 DRM_DEBUG_DRIVER("\n");
42
43 mixer->status = STI_MIXER_DISABLING;
44
45 drm_crtc_wait_one_vblank(crtc);
46}
47
48static int
49sti_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode)
50{
51 struct sti_mixer *mixer = to_sti_mixer(crtc);
52 struct device *dev = mixer->dev;
53 struct sti_compositor *compo = dev_get_drvdata(dev);
54 struct clk *compo_clk, *pix_clk;
55 int rate = mode->clock * 1000;
56
57 DRM_DEBUG_KMS("CRTC:%d (%s) mode: (%s)\n",
58 crtc->base.id, sti_mixer_to_str(mixer), mode->name);
59
60 DRM_DEBUG_KMS(DRM_MODE_FMT "\n", DRM_MODE_ARG(mode));
61
62 if (mixer->id == STI_MIXER_MAIN) {
63 compo_clk = compo->clk_compo_main;
64 pix_clk = compo->clk_pix_main;
65 } else {
66 compo_clk = compo->clk_compo_aux;
67 pix_clk = compo->clk_pix_aux;
68 }
69
70 /* Prepare and enable the compo IP clock */
71 if (clk_prepare_enable(clk: compo_clk)) {
72 DRM_INFO("Failed to prepare/enable compositor clk\n");
73 goto compo_error;
74 }
75
76 /* Set rate and prepare/enable pixel clock */
77 if (clk_set_rate(clk: pix_clk, rate) < 0) {
78 DRM_ERROR("Cannot set rate (%dHz) for pix clk\n", rate);
79 goto pix_error;
80 }
81 if (clk_prepare_enable(clk: pix_clk)) {
82 DRM_ERROR("Failed to prepare/enable pix clk\n");
83 goto pix_error;
84 }
85
86 sti_vtg_set_config(vtg: compo->vtg[mixer->id], mode: &crtc->mode);
87
88 if (sti_mixer_active_video_area(mixer, mode: &crtc->mode)) {
89 DRM_ERROR("Can't set active video area\n");
90 goto mixer_error;
91 }
92
93 return 0;
94
95mixer_error:
96 clk_disable_unprepare(clk: pix_clk);
97pix_error:
98 clk_disable_unprepare(clk: compo_clk);
99compo_error:
100 return -EINVAL;
101}
102
103static void sti_crtc_disable(struct drm_crtc *crtc)
104{
105 struct sti_mixer *mixer = to_sti_mixer(crtc);
106 struct device *dev = mixer->dev;
107 struct sti_compositor *compo = dev_get_drvdata(dev);
108
109 DRM_DEBUG_KMS("CRTC:%d (%s)\n", crtc->base.id, sti_mixer_to_str(mixer));
110
111 /* Disable Background */
112 sti_mixer_set_background_status(mixer, enable: false);
113
114 drm_crtc_vblank_off(crtc);
115
116 /* Disable pixel clock and compo IP clocks */
117 if (mixer->id == STI_MIXER_MAIN) {
118 clk_disable_unprepare(clk: compo->clk_pix_main);
119 clk_disable_unprepare(clk: compo->clk_compo_main);
120 } else {
121 clk_disable_unprepare(clk: compo->clk_pix_aux);
122 clk_disable_unprepare(clk: compo->clk_compo_aux);
123 }
124
125 mixer->status = STI_MIXER_DISABLED;
126}
127
128static void
129sti_crtc_mode_set_nofb(struct drm_crtc *crtc)
130{
131 sti_crtc_mode_set(crtc, mode: &crtc->state->adjusted_mode);
132}
133
134static void sti_crtc_atomic_flush(struct drm_crtc *crtc,
135 struct drm_atomic_state *state)
136{
137 struct drm_device *drm_dev = crtc->dev;
138 struct sti_mixer *mixer = to_sti_mixer(crtc);
139 struct sti_compositor *compo = dev_get_drvdata(dev: mixer->dev);
140 struct drm_plane *p;
141 struct drm_pending_vblank_event *event;
142 unsigned long flags;
143
144 DRM_DEBUG_DRIVER("\n");
145
146 /* perform plane actions */
147 list_for_each_entry(p, &drm_dev->mode_config.plane_list, head) {
148 struct sti_plane *plane = to_sti_plane(p);
149
150 switch (plane->status) {
151 case STI_PLANE_UPDATED:
152 /* ignore update for other CRTC */
153 if (p->state->crtc != crtc)
154 continue;
155
156 /* update planes tag as updated */
157 DRM_DEBUG_DRIVER("update plane %s\n",
158 sti_plane_to_str(plane));
159
160 if (sti_mixer_set_plane_depth(mixer, plane)) {
161 DRM_ERROR("Cannot set plane %s depth\n",
162 sti_plane_to_str(plane));
163 break;
164 }
165
166 if (sti_mixer_set_plane_status(mixer, plane, status: true)) {
167 DRM_ERROR("Cannot enable plane %s at mixer\n",
168 sti_plane_to_str(plane));
169 break;
170 }
171
172 /* if plane is HQVDP_0 then commit the vid[0] */
173 if (plane->desc == STI_HQVDP_0)
174 sti_vid_commit(vid: compo->vid[0], state: p->state);
175
176 plane->status = STI_PLANE_READY;
177
178 break;
179 case STI_PLANE_DISABLING:
180 /* disabling sequence for planes tag as disabling */
181 DRM_DEBUG_DRIVER("disable plane %s from mixer\n",
182 sti_plane_to_str(plane));
183
184 if (sti_mixer_set_plane_status(mixer, plane, status: false)) {
185 DRM_ERROR("Cannot disable plane %s at mixer\n",
186 sti_plane_to_str(plane));
187 continue;
188 }
189
190 if (plane->desc == STI_CURSOR)
191 /* tag plane status for disabled */
192 plane->status = STI_PLANE_DISABLED;
193 else
194 /* tag plane status for flushing */
195 plane->status = STI_PLANE_FLUSHING;
196
197 /* if plane is HQVDP_0 then disable the vid[0] */
198 if (plane->desc == STI_HQVDP_0)
199 sti_vid_disable(vid: compo->vid[0]);
200
201 break;
202 default:
203 /* Other status case are not handled */
204 break;
205 }
206 }
207
208 event = crtc->state->event;
209 if (event) {
210 crtc->state->event = NULL;
211
212 spin_lock_irqsave(&crtc->dev->event_lock, flags);
213 if (drm_crtc_vblank_get(crtc) == 0)
214 drm_crtc_arm_vblank_event(crtc, e: event);
215 else
216 drm_crtc_send_vblank_event(crtc, e: event);
217 spin_unlock_irqrestore(lock: &crtc->dev->event_lock, flags);
218 }
219}
220
221static const struct drm_crtc_helper_funcs sti_crtc_helper_funcs = {
222 .mode_set_nofb = sti_crtc_mode_set_nofb,
223 .atomic_flush = sti_crtc_atomic_flush,
224 .atomic_enable = sti_crtc_atomic_enable,
225 .atomic_disable = sti_crtc_atomic_disable,
226};
227
228static void sti_crtc_destroy(struct drm_crtc *crtc)
229{
230 DRM_DEBUG_KMS("\n");
231 drm_crtc_cleanup(crtc);
232}
233
234static int sti_crtc_set_property(struct drm_crtc *crtc,
235 struct drm_property *property,
236 uint64_t val)
237{
238 DRM_DEBUG_KMS("\n");
239 return 0;
240}
241
242int sti_crtc_vblank_cb(struct notifier_block *nb,
243 unsigned long event, void *data)
244{
245 struct sti_compositor *compo;
246 struct drm_crtc *crtc = data;
247 struct sti_mixer *mixer;
248 unsigned int pipe;
249
250 pipe = drm_crtc_index(crtc);
251 compo = container_of(nb, struct sti_compositor, vtg_vblank_nb[pipe]);
252 mixer = compo->mixer[pipe];
253
254 if ((event != VTG_TOP_FIELD_EVENT) &&
255 (event != VTG_BOTTOM_FIELD_EVENT)) {
256 DRM_ERROR("unknown event: %lu\n", event);
257 return -EINVAL;
258 }
259
260 drm_crtc_handle_vblank(crtc);
261
262 if (mixer->status == STI_MIXER_DISABLING) {
263 struct drm_plane *p;
264
265 /* Disable mixer only if all overlay planes (GDP and VDP)
266 * are disabled */
267 list_for_each_entry(p, &crtc->dev->mode_config.plane_list,
268 head) {
269 struct sti_plane *plane = to_sti_plane(p);
270
271 if ((plane->desc & STI_PLANE_TYPE_MASK) <= STI_VDP)
272 if (plane->status != STI_PLANE_DISABLED)
273 return 0;
274 }
275 sti_crtc_disable(crtc);
276 }
277
278 return 0;
279}
280
281static int sti_crtc_enable_vblank(struct drm_crtc *crtc)
282{
283 struct drm_device *dev = crtc->dev;
284 unsigned int pipe = crtc->index;
285 struct sti_private *dev_priv = dev->dev_private;
286 struct sti_compositor *compo = dev_priv->compo;
287 struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb[pipe];
288 struct sti_vtg *vtg = compo->vtg[pipe];
289
290 DRM_DEBUG_DRIVER("\n");
291
292 if (sti_vtg_register_client(vtg, nb: vtg_vblank_nb, crtc)) {
293 DRM_ERROR("Cannot register VTG notifier\n");
294 return -EINVAL;
295 }
296
297 return 0;
298}
299
300static void sti_crtc_disable_vblank(struct drm_crtc *crtc)
301{
302 struct drm_device *drm_dev = crtc->dev;
303 unsigned int pipe = crtc->index;
304 struct sti_private *priv = drm_dev->dev_private;
305 struct sti_compositor *compo = priv->compo;
306 struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb[pipe];
307 struct sti_vtg *vtg = compo->vtg[pipe];
308
309 DRM_DEBUG_DRIVER("\n");
310
311 if (sti_vtg_unregister_client(vtg, nb: vtg_vblank_nb))
312 DRM_DEBUG_DRIVER("Warning: cannot unregister VTG notifier\n");
313}
314
315static int sti_crtc_late_register(struct drm_crtc *crtc)
316{
317 struct sti_mixer *mixer = to_sti_mixer(crtc);
318 struct sti_compositor *compo = dev_get_drvdata(dev: mixer->dev);
319
320 if (drm_crtc_index(crtc) == 0)
321 sti_compositor_debugfs_init(compo, minor: crtc->dev->primary);
322
323 return 0;
324}
325
326static const struct drm_crtc_funcs sti_crtc_funcs = {
327 .set_config = drm_atomic_helper_set_config,
328 .page_flip = drm_atomic_helper_page_flip,
329 .destroy = sti_crtc_destroy,
330 .set_property = sti_crtc_set_property,
331 .reset = drm_atomic_helper_crtc_reset,
332 .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
333 .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
334 .late_register = sti_crtc_late_register,
335 .enable_vblank = sti_crtc_enable_vblank,
336 .disable_vblank = sti_crtc_disable_vblank,
337};
338
339bool sti_crtc_is_main(struct drm_crtc *crtc)
340{
341 struct sti_mixer *mixer = to_sti_mixer(crtc);
342
343 if (mixer->id == STI_MIXER_MAIN)
344 return true;
345
346 return false;
347}
348
349int sti_crtc_init(struct drm_device *drm_dev, struct sti_mixer *mixer,
350 struct drm_plane *primary, struct drm_plane *cursor)
351{
352 struct drm_crtc *crtc = &mixer->drm_crtc;
353 int res;
354
355 res = drm_crtc_init_with_planes(dev: drm_dev, crtc, primary, cursor,
356 funcs: &sti_crtc_funcs, NULL);
357 if (res) {
358 DRM_ERROR("Can't initialize CRTC\n");
359 return -EINVAL;
360 }
361
362 drm_crtc_helper_add(crtc, funcs: &sti_crtc_helper_funcs);
363
364 DRM_DEBUG_DRIVER("drm CRTC:%d mapped to %s\n",
365 crtc->base.id, sti_mixer_to_str(mixer));
366
367 return 0;
368}
369

source code of linux/drivers/gpu/drm/sti/sti_crtc.c