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