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 23 static void sti_crtc_enable(struct drm_crtc *crtc) 24 { 25 struct sti_mixer *mixer = to_sti_mixer(crtc); 26 27 DRM_DEBUG_DRIVER("\n"); 28 29 mixer->status = STI_MIXER_READY; 30 31 drm_crtc_vblank_on(crtc); 32 } 33 34 static void sti_crtc_disabling(struct drm_crtc *crtc) 35 { 36 struct sti_mixer *mixer = to_sti_mixer(crtc); 37 38 DRM_DEBUG_DRIVER("\n"); 39 40 mixer->status = STI_MIXER_DISABLING; 41 } 42 43 static int 44 sti_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode) 45 { 46 struct sti_mixer *mixer = to_sti_mixer(crtc); 47 struct device *dev = mixer->dev; 48 struct sti_compositor *compo = dev_get_drvdata(dev); 49 struct clk *compo_clk, *pix_clk; 50 int rate = mode->clock * 1000; 51 52 DRM_DEBUG_KMS("CRTC:%d (%s) mode:%d (%s)\n", 53 crtc->base.id, sti_mixer_to_str(mixer), 54 mode->base.id, mode->name); 55 56 DRM_DEBUG_KMS("%d %d %d %d %d %d %d %d %d %d 0x%x 0x%x\n", 57 mode->vrefresh, mode->clock, 58 mode->hdisplay, 59 mode->hsync_start, mode->hsync_end, 60 mode->htotal, 61 mode->vdisplay, 62 mode->vsync_start, mode->vsync_end, 63 mode->vtotal, mode->type, mode->flags); 64 65 if (mixer->id == STI_MIXER_MAIN) { 66 compo_clk = compo->clk_compo_main; 67 pix_clk = compo->clk_pix_main; 68 } else { 69 compo_clk = compo->clk_compo_aux; 70 pix_clk = compo->clk_pix_aux; 71 } 72 73 /* Prepare and enable the compo IP clock */ 74 if (clk_prepare_enable(compo_clk)) { 75 DRM_INFO("Failed to prepare/enable compositor clk\n"); 76 goto compo_error; 77 } 78 79 /* Set rate and prepare/enable pixel clock */ 80 if (clk_set_rate(pix_clk, rate) < 0) { 81 DRM_ERROR("Cannot set rate (%dHz) for pix clk\n", rate); 82 goto pix_error; 83 } 84 if (clk_prepare_enable(pix_clk)) { 85 DRM_ERROR("Failed to prepare/enable pix clk\n"); 86 goto pix_error; 87 } 88 89 sti_vtg_set_config(compo->vtg[mixer->id], &crtc->mode); 90 91 if (sti_mixer_active_video_area(mixer, &crtc->mode)) { 92 DRM_ERROR("Can't set active video area\n"); 93 goto mixer_error; 94 } 95 96 return 0; 97 98 mixer_error: 99 clk_disable_unprepare(pix_clk); 100 pix_error: 101 clk_disable_unprepare(compo_clk); 102 compo_error: 103 return -EINVAL; 104 } 105 106 static void sti_crtc_disable(struct drm_crtc *crtc) 107 { 108 struct sti_mixer *mixer = to_sti_mixer(crtc); 109 struct device *dev = mixer->dev; 110 struct sti_compositor *compo = dev_get_drvdata(dev); 111 112 DRM_DEBUG_KMS("CRTC:%d (%s)\n", crtc->base.id, sti_mixer_to_str(mixer)); 113 114 /* Disable Background */ 115 sti_mixer_set_background_status(mixer, false); 116 117 drm_crtc_vblank_off(crtc); 118 119 /* Disable pixel clock and compo IP clocks */ 120 if (mixer->id == STI_MIXER_MAIN) { 121 clk_disable_unprepare(compo->clk_pix_main); 122 clk_disable_unprepare(compo->clk_compo_main); 123 } else { 124 clk_disable_unprepare(compo->clk_pix_aux); 125 clk_disable_unprepare(compo->clk_compo_aux); 126 } 127 128 mixer->status = STI_MIXER_DISABLED; 129 } 130 131 static void 132 sti_crtc_mode_set_nofb(struct drm_crtc *crtc) 133 { 134 sti_crtc_mode_set(crtc, &crtc->state->adjusted_mode); 135 } 136 137 static void sti_crtc_atomic_begin(struct drm_crtc *crtc, 138 struct drm_crtc_state *old_crtc_state) 139 { 140 struct sti_mixer *mixer = to_sti_mixer(crtc); 141 142 if (crtc->state->event) { 143 crtc->state->event->pipe = drm_crtc_index(crtc); 144 145 WARN_ON(drm_crtc_vblank_get(crtc) != 0); 146 147 mixer->pending_event = crtc->state->event; 148 crtc->state->event = NULL; 149 } 150 } 151 152 static void sti_crtc_atomic_flush(struct drm_crtc *crtc, 153 struct drm_crtc_state *old_crtc_state) 154 { 155 struct drm_device *drm_dev = crtc->dev; 156 struct sti_mixer *mixer = to_sti_mixer(crtc); 157 struct sti_compositor *compo = dev_get_drvdata(mixer->dev); 158 struct drm_plane *p; 159 160 DRM_DEBUG_DRIVER("\n"); 161 162 /* perform plane actions */ 163 list_for_each_entry(p, &drm_dev->mode_config.plane_list, head) { 164 struct sti_plane *plane = to_sti_plane(p); 165 166 switch (plane->status) { 167 case STI_PLANE_UPDATED: 168 /* ignore update for other CRTC */ 169 if (p->state->crtc != crtc) 170 continue; 171 172 /* update planes tag as updated */ 173 DRM_DEBUG_DRIVER("update plane %s\n", 174 sti_plane_to_str(plane)); 175 176 if (sti_mixer_set_plane_depth(mixer, plane)) { 177 DRM_ERROR("Cannot set plane %s depth\n", 178 sti_plane_to_str(plane)); 179 break; 180 } 181 182 if (sti_mixer_set_plane_status(mixer, plane, true)) { 183 DRM_ERROR("Cannot enable plane %s at mixer\n", 184 sti_plane_to_str(plane)); 185 break; 186 } 187 188 /* if plane is HQVDP_0 then commit the vid[0] */ 189 if (plane->desc == STI_HQVDP_0) 190 sti_vid_commit(compo->vid[0], p->state); 191 192 plane->status = STI_PLANE_READY; 193 194 break; 195 case STI_PLANE_DISABLING: 196 /* disabling sequence for planes tag as disabling */ 197 DRM_DEBUG_DRIVER("disable plane %s from mixer\n", 198 sti_plane_to_str(plane)); 199 200 if (sti_mixer_set_plane_status(mixer, plane, false)) { 201 DRM_ERROR("Cannot disable plane %s at mixer\n", 202 sti_plane_to_str(plane)); 203 continue; 204 } 205 206 if (plane->desc == STI_CURSOR) 207 /* tag plane status for disabled */ 208 plane->status = STI_PLANE_DISABLED; 209 else 210 /* tag plane status for flushing */ 211 plane->status = STI_PLANE_FLUSHING; 212 213 /* if plane is HQVDP_0 then disable the vid[0] */ 214 if (plane->desc == STI_HQVDP_0) 215 sti_vid_disable(compo->vid[0]); 216 217 break; 218 default: 219 /* Other status case are not handled */ 220 break; 221 } 222 } 223 } 224 225 static const struct drm_crtc_helper_funcs sti_crtc_helper_funcs = { 226 .enable = sti_crtc_enable, 227 .disable = sti_crtc_disabling, 228 .mode_set_nofb = sti_crtc_mode_set_nofb, 229 .atomic_begin = sti_crtc_atomic_begin, 230 .atomic_flush = sti_crtc_atomic_flush, 231 }; 232 233 static void sti_crtc_destroy(struct drm_crtc *crtc) 234 { 235 DRM_DEBUG_KMS("\n"); 236 drm_crtc_cleanup(crtc); 237 } 238 239 static 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 } 246 247 int 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 unsigned long flags; 254 struct sti_private *priv; 255 unsigned int pipe; 256 257 priv = crtc->dev->dev_private; 258 pipe = drm_crtc_index(crtc); 259 compo = container_of(nb, struct sti_compositor, vtg_vblank_nb[pipe]); 260 mixer = compo->mixer[pipe]; 261 262 if ((event != VTG_TOP_FIELD_EVENT) && 263 (event != VTG_BOTTOM_FIELD_EVENT)) { 264 DRM_ERROR("unknown event: %lu\n", event); 265 return -EINVAL; 266 } 267 268 drm_crtc_handle_vblank(crtc); 269 270 spin_lock_irqsave(&crtc->dev->event_lock, flags); 271 if (mixer->pending_event) { 272 drm_crtc_send_vblank_event(crtc, mixer->pending_event); 273 drm_crtc_vblank_put(crtc); 274 mixer->pending_event = NULL; 275 } 276 spin_unlock_irqrestore(&crtc->dev->event_lock, flags); 277 278 if (mixer->status == STI_MIXER_DISABLING) { 279 struct drm_plane *p; 280 281 /* Disable mixer only if all overlay planes (GDP and VDP) 282 * are disabled */ 283 list_for_each_entry(p, &crtc->dev->mode_config.plane_list, 284 head) { 285 struct sti_plane *plane = to_sti_plane(p); 286 287 if ((plane->desc & STI_PLANE_TYPE_MASK) <= STI_VDP) 288 if (plane->status != STI_PLANE_DISABLED) 289 return 0; 290 } 291 sti_crtc_disable(crtc); 292 } 293 294 return 0; 295 } 296 297 int sti_crtc_enable_vblank(struct drm_device *dev, unsigned int pipe) 298 { 299 struct sti_private *dev_priv = dev->dev_private; 300 struct sti_compositor *compo = dev_priv->compo; 301 struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb[pipe]; 302 struct drm_crtc *crtc = &compo->mixer[pipe]->drm_crtc; 303 struct sti_vtg *vtg = compo->vtg[pipe]; 304 305 DRM_DEBUG_DRIVER("\n"); 306 307 if (sti_vtg_register_client(vtg, vtg_vblank_nb, crtc)) { 308 DRM_ERROR("Cannot register VTG notifier\n"); 309 return -EINVAL; 310 } 311 312 return 0; 313 } 314 315 void sti_crtc_disable_vblank(struct drm_device *drm_dev, unsigned int pipe) 316 { 317 struct sti_private *priv = drm_dev->dev_private; 318 struct sti_compositor *compo = priv->compo; 319 struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb[pipe]; 320 struct drm_crtc *crtc = &compo->mixer[pipe]->drm_crtc; 321 struct sti_vtg *vtg = compo->vtg[pipe]; 322 323 DRM_DEBUG_DRIVER("\n"); 324 325 if (sti_vtg_unregister_client(vtg, vtg_vblank_nb)) 326 DRM_DEBUG_DRIVER("Warning: cannot unregister VTG notifier\n"); 327 328 /* free the resources of the pending requests */ 329 if (compo->mixer[pipe]->pending_event) { 330 drm_crtc_vblank_put(crtc); 331 compo->mixer[pipe]->pending_event = NULL; 332 } 333 } 334 335 static int sti_crtc_late_register(struct drm_crtc *crtc) 336 { 337 struct sti_mixer *mixer = to_sti_mixer(crtc); 338 struct sti_compositor *compo = dev_get_drvdata(mixer->dev); 339 340 if (drm_crtc_index(crtc) == 0) 341 return sti_compositor_debugfs_init(compo, crtc->dev->primary); 342 343 return 0; 344 } 345 346 static const struct drm_crtc_funcs sti_crtc_funcs = { 347 .set_config = drm_atomic_helper_set_config, 348 .page_flip = drm_atomic_helper_page_flip, 349 .destroy = sti_crtc_destroy, 350 .set_property = sti_crtc_set_property, 351 .reset = drm_atomic_helper_crtc_reset, 352 .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state, 353 .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state, 354 .late_register = sti_crtc_late_register, 355 }; 356 357 bool sti_crtc_is_main(struct drm_crtc *crtc) 358 { 359 struct sti_mixer *mixer = to_sti_mixer(crtc); 360 361 if (mixer->id == STI_MIXER_MAIN) 362 return true; 363 364 return false; 365 } 366 367 int sti_crtc_init(struct drm_device *drm_dev, struct sti_mixer *mixer, 368 struct drm_plane *primary, struct drm_plane *cursor) 369 { 370 struct drm_crtc *crtc = &mixer->drm_crtc; 371 int res; 372 373 res = drm_crtc_init_with_planes(drm_dev, crtc, primary, cursor, 374 &sti_crtc_funcs, NULL); 375 if (res) { 376 DRM_ERROR("Can't initialze CRTC\n"); 377 return -EINVAL; 378 } 379 380 drm_crtc_helper_add(crtc, &sti_crtc_helper_funcs); 381 382 DRM_DEBUG_DRIVER("drm CRTC:%d mapped to %s\n", 383 crtc->base.id, sti_mixer_to_str(mixer)); 384 385 return 0; 386 } 387