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(mixer->id == STI_MIXER_MAIN ? 90 compo->vtg_main : compo->vtg_aux, &crtc->mode); 91 92 if (sti_mixer_active_video_area(mixer, &crtc->mode)) { 93 DRM_ERROR("Can't set active video area\n"); 94 goto mixer_error; 95 } 96 97 return 0; 98 99 mixer_error: 100 clk_disable_unprepare(pix_clk); 101 pix_error: 102 clk_disable_unprepare(compo_clk); 103 compo_error: 104 return -EINVAL; 105 } 106 107 static void sti_crtc_disable(struct drm_crtc *crtc) 108 { 109 struct sti_mixer *mixer = to_sti_mixer(crtc); 110 struct device *dev = mixer->dev; 111 struct sti_compositor *compo = dev_get_drvdata(dev); 112 113 DRM_DEBUG_KMS("CRTC:%d (%s)\n", crtc->base.id, sti_mixer_to_str(mixer)); 114 115 /* Disable Background */ 116 sti_mixer_set_background_status(mixer, false); 117 118 drm_crtc_vblank_off(crtc); 119 120 /* Disable pixel clock and compo IP clocks */ 121 if (mixer->id == STI_MIXER_MAIN) { 122 clk_disable_unprepare(compo->clk_pix_main); 123 clk_disable_unprepare(compo->clk_compo_main); 124 } else { 125 clk_disable_unprepare(compo->clk_pix_aux); 126 clk_disable_unprepare(compo->clk_compo_aux); 127 } 128 129 mixer->status = STI_MIXER_DISABLED; 130 } 131 132 static void 133 sti_crtc_mode_set_nofb(struct drm_crtc *crtc) 134 { 135 sti_crtc_mode_set(crtc, &crtc->state->adjusted_mode); 136 } 137 138 static void sti_crtc_atomic_begin(struct drm_crtc *crtc, 139 struct drm_crtc_state *old_crtc_state) 140 { 141 struct sti_mixer *mixer = to_sti_mixer(crtc); 142 143 if (crtc->state->event) { 144 crtc->state->event->pipe = drm_crtc_index(crtc); 145 146 WARN_ON(drm_crtc_vblank_get(crtc) != 0); 147 148 mixer->pending_event = crtc->state->event; 149 crtc->state->event = NULL; 150 } 151 } 152 153 static void sti_crtc_atomic_flush(struct drm_crtc *crtc, 154 struct drm_crtc_state *old_crtc_state) 155 { 156 struct drm_device *drm_dev = crtc->dev; 157 struct sti_mixer *mixer = to_sti_mixer(crtc); 158 struct sti_compositor *compo = dev_get_drvdata(mixer->dev); 159 struct drm_plane *p; 160 161 DRM_DEBUG_DRIVER("\n"); 162 163 /* perform plane actions */ 164 list_for_each_entry(p, &drm_dev->mode_config.plane_list, head) { 165 struct sti_plane *plane = to_sti_plane(p); 166 167 switch (plane->status) { 168 case STI_PLANE_UPDATED: 169 /* update planes tag as updated */ 170 DRM_DEBUG_DRIVER("update plane %s\n", 171 sti_plane_to_str(plane)); 172 173 if (sti_mixer_set_plane_depth(mixer, plane)) { 174 DRM_ERROR("Cannot set plane %s depth\n", 175 sti_plane_to_str(plane)); 176 break; 177 } 178 179 if (sti_mixer_set_plane_status(mixer, plane, true)) { 180 DRM_ERROR("Cannot enable plane %s at mixer\n", 181 sti_plane_to_str(plane)); 182 break; 183 } 184 185 /* if plane is HQVDP_0 then commit the vid[0] */ 186 if (plane->desc == STI_HQVDP_0) 187 sti_vid_commit(compo->vid[0], p->state); 188 189 plane->status = STI_PLANE_READY; 190 191 break; 192 case STI_PLANE_DISABLING: 193 /* disabling sequence for planes tag as disabling */ 194 DRM_DEBUG_DRIVER("disable plane %s from mixer\n", 195 sti_plane_to_str(plane)); 196 197 if (sti_mixer_set_plane_status(mixer, plane, false)) { 198 DRM_ERROR("Cannot disable plane %s at mixer\n", 199 sti_plane_to_str(plane)); 200 continue; 201 } 202 203 if (plane->desc == STI_CURSOR) 204 /* tag plane status for disabled */ 205 plane->status = STI_PLANE_DISABLED; 206 else 207 /* tag plane status for flushing */ 208 plane->status = STI_PLANE_FLUSHING; 209 210 /* if plane is HQVDP_0 then disable the vid[0] */ 211 if (plane->desc == STI_HQVDP_0) 212 sti_vid_disable(compo->vid[0]); 213 214 break; 215 default: 216 /* Other status case are not handled */ 217 break; 218 } 219 } 220 } 221 222 static const struct drm_crtc_helper_funcs sti_crtc_helper_funcs = { 223 .enable = sti_crtc_enable, 224 .disable = sti_crtc_disabling, 225 .mode_set_nofb = sti_crtc_mode_set_nofb, 226 .atomic_begin = sti_crtc_atomic_begin, 227 .atomic_flush = sti_crtc_atomic_flush, 228 }; 229 230 static void sti_crtc_destroy(struct drm_crtc *crtc) 231 { 232 DRM_DEBUG_KMS("\n"); 233 drm_crtc_cleanup(crtc); 234 } 235 236 static int sti_crtc_set_property(struct drm_crtc *crtc, 237 struct drm_property *property, 238 uint64_t val) 239 { 240 DRM_DEBUG_KMS("\n"); 241 return 0; 242 } 243 244 int sti_crtc_vblank_cb(struct notifier_block *nb, 245 unsigned long event, void *data) 246 { 247 struct sti_compositor *compo = 248 container_of(nb, struct sti_compositor, vtg_vblank_nb); 249 struct drm_crtc *crtc = data; 250 struct sti_mixer *mixer; 251 unsigned long flags; 252 struct sti_private *priv; 253 unsigned int pipe; 254 255 priv = crtc->dev->dev_private; 256 pipe = drm_crtc_index(crtc); 257 mixer = compo->mixer[pipe]; 258 259 if ((event != VTG_TOP_FIELD_EVENT) && 260 (event != VTG_BOTTOM_FIELD_EVENT)) { 261 DRM_ERROR("unknown event: %lu\n", event); 262 return -EINVAL; 263 } 264 265 drm_crtc_handle_vblank(crtc); 266 267 spin_lock_irqsave(&crtc->dev->event_lock, flags); 268 if (mixer->pending_event) { 269 drm_crtc_send_vblank_event(crtc, mixer->pending_event); 270 drm_crtc_vblank_put(crtc); 271 mixer->pending_event = NULL; 272 } 273 spin_unlock_irqrestore(&crtc->dev->event_lock, flags); 274 275 if (mixer->status == STI_MIXER_DISABLING) { 276 struct drm_plane *p; 277 278 /* Disable mixer only if all overlay planes (GDP and VDP) 279 * are disabled */ 280 list_for_each_entry(p, &crtc->dev->mode_config.plane_list, 281 head) { 282 struct sti_plane *plane = to_sti_plane(p); 283 284 if ((plane->desc & STI_PLANE_TYPE_MASK) <= STI_VDP) 285 if (plane->status != STI_PLANE_DISABLED) 286 return 0; 287 } 288 sti_crtc_disable(crtc); 289 } 290 291 return 0; 292 } 293 294 int sti_crtc_enable_vblank(struct drm_device *dev, unsigned int pipe) 295 { 296 struct sti_private *dev_priv = dev->dev_private; 297 struct sti_compositor *compo = dev_priv->compo; 298 struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb; 299 struct drm_crtc *crtc = &compo->mixer[pipe]->drm_crtc; 300 301 DRM_DEBUG_DRIVER("\n"); 302 303 if (sti_vtg_register_client(pipe == STI_MIXER_MAIN ? 304 compo->vtg_main : compo->vtg_aux, 305 vtg_vblank_nb, crtc)) { 306 DRM_ERROR("Cannot register VTG notifier\n"); 307 return -EINVAL; 308 } 309 310 return 0; 311 } 312 313 void sti_crtc_disable_vblank(struct drm_device *drm_dev, unsigned int pipe) 314 { 315 struct sti_private *priv = drm_dev->dev_private; 316 struct sti_compositor *compo = priv->compo; 317 struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb; 318 struct drm_crtc *crtc = &compo->mixer[pipe]->drm_crtc; 319 320 DRM_DEBUG_DRIVER("\n"); 321 322 if (sti_vtg_unregister_client(pipe == STI_MIXER_MAIN ? 323 compo->vtg_main : compo->vtg_aux, vtg_vblank_nb)) 324 DRM_DEBUG_DRIVER("Warning: cannot unregister VTG notifier\n"); 325 326 /* free the resources of the pending requests */ 327 if (compo->mixer[pipe]->pending_event) { 328 drm_crtc_vblank_put(crtc); 329 compo->mixer[pipe]->pending_event = NULL; 330 } 331 } 332 333 static int sti_crtc_late_register(struct drm_crtc *crtc) 334 { 335 struct sti_mixer *mixer = to_sti_mixer(crtc); 336 struct sti_compositor *compo = dev_get_drvdata(mixer->dev); 337 338 if (drm_crtc_index(crtc) == 0) 339 return sti_compositor_debufs_init(compo, crtc->dev->primary); 340 341 return 0; 342 } 343 344 static 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 .late_register = sti_crtc_late_register, 353 }; 354 355 bool sti_crtc_is_main(struct drm_crtc *crtc) 356 { 357 struct sti_mixer *mixer = to_sti_mixer(crtc); 358 359 if (mixer->id == STI_MIXER_MAIN) 360 return true; 361 362 return false; 363 } 364 365 int sti_crtc_init(struct drm_device *drm_dev, struct sti_mixer *mixer, 366 struct drm_plane *primary, struct drm_plane *cursor) 367 { 368 struct drm_crtc *crtc = &mixer->drm_crtc; 369 int res; 370 371 res = drm_crtc_init_with_planes(drm_dev, crtc, primary, cursor, 372 &sti_crtc_funcs, NULL); 373 if (res) { 374 DRM_ERROR("Can't initialze CRTC\n"); 375 return -EINVAL; 376 } 377 378 drm_crtc_helper_add(crtc, &sti_crtc_helper_funcs); 379 380 DRM_DEBUG_DRIVER("drm CRTC:%d mapped to %s\n", 381 crtc->base.id, sti_mixer_to_str(mixer)); 382 383 return 0; 384 } 385