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 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 45 static 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 54 static 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 return true; 60 } 61 62 static int 63 sti_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode) 64 { 65 struct sti_mixer *mixer = to_sti_mixer(crtc); 66 struct device *dev = mixer->dev; 67 struct sti_compositor *compo = dev_get_drvdata(dev); 68 struct clk *clk; 69 int rate = mode->clock * 1000; 70 int res; 71 72 DRM_DEBUG_KMS("CRTC:%d (%s) mode:%d (%s)\n", 73 crtc->base.id, sti_mixer_to_str(mixer), 74 mode->base.id, mode->name); 75 76 DRM_DEBUG_KMS("%d %d %d %d %d %d %d %d %d %d 0x%x 0x%x\n", 77 mode->vrefresh, mode->clock, 78 mode->hdisplay, 79 mode->hsync_start, mode->hsync_end, 80 mode->htotal, 81 mode->vdisplay, 82 mode->vsync_start, mode->vsync_end, 83 mode->vtotal, mode->type, mode->flags); 84 85 /* Set rate and prepare/enable pixel clock */ 86 if (mixer->id == STI_MIXER_MAIN) 87 clk = compo->clk_pix_main; 88 else 89 clk = compo->clk_pix_aux; 90 91 res = clk_set_rate(clk, rate); 92 if (res < 0) { 93 DRM_ERROR("Cannot set rate (%dHz) for pix clk\n", rate); 94 return -EINVAL; 95 } 96 if (clk_prepare_enable(clk)) { 97 DRM_ERROR("Failed to prepare/enable pix clk\n"); 98 return -EINVAL; 99 } 100 101 sti_vtg_set_config(mixer->id == STI_MIXER_MAIN ? 102 compo->vtg_main : compo->vtg_aux, &crtc->mode); 103 104 res = sti_mixer_active_video_area(mixer, &crtc->mode); 105 if (res) { 106 DRM_ERROR("Can't set active video area\n"); 107 return -EINVAL; 108 } 109 110 return res; 111 } 112 113 static void sti_crtc_disable(struct drm_crtc *crtc) 114 { 115 struct sti_mixer *mixer = to_sti_mixer(crtc); 116 struct device *dev = mixer->dev; 117 struct sti_compositor *compo = dev_get_drvdata(dev); 118 119 DRM_DEBUG_KMS("CRTC:%d (%s)\n", crtc->base.id, sti_mixer_to_str(mixer)); 120 121 /* Disable Background */ 122 sti_mixer_set_background_status(mixer, false); 123 124 drm_crtc_vblank_off(crtc); 125 126 /* Disable pixel clock and compo IP clocks */ 127 if (mixer->id == STI_MIXER_MAIN) { 128 clk_disable_unprepare(compo->clk_pix_main); 129 clk_disable_unprepare(compo->clk_compo_main); 130 } else { 131 clk_disable_unprepare(compo->clk_pix_aux); 132 clk_disable_unprepare(compo->clk_compo_aux); 133 } 134 135 mixer->status = STI_MIXER_DISABLED; 136 } 137 138 static void 139 sti_crtc_mode_set_nofb(struct drm_crtc *crtc) 140 { 141 sti_crtc_enable(crtc); 142 sti_crtc_mode_set(crtc, &crtc->state->adjusted_mode); 143 } 144 145 static void sti_crtc_atomic_begin(struct drm_crtc *crtc, 146 struct drm_crtc_state *old_crtc_state) 147 { 148 struct sti_mixer *mixer = to_sti_mixer(crtc); 149 150 if (crtc->state->event) { 151 crtc->state->event->pipe = drm_crtc_index(crtc); 152 153 WARN_ON(drm_crtc_vblank_get(crtc) != 0); 154 155 mixer->pending_event = crtc->state->event; 156 crtc->state->event = NULL; 157 } 158 } 159 160 static void sti_crtc_atomic_flush(struct drm_crtc *crtc, 161 struct drm_crtc_state *old_crtc_state) 162 { 163 struct drm_device *drm_dev = crtc->dev; 164 struct sti_mixer *mixer = to_sti_mixer(crtc); 165 struct sti_compositor *compo = dev_get_drvdata(mixer->dev); 166 struct drm_plane *p; 167 168 DRM_DEBUG_DRIVER("\n"); 169 170 /* perform plane actions */ 171 list_for_each_entry(p, &drm_dev->mode_config.plane_list, head) { 172 struct sti_plane *plane = to_sti_plane(p); 173 174 switch (plane->status) { 175 case STI_PLANE_UPDATED: 176 /* update planes tag as updated */ 177 DRM_DEBUG_DRIVER("update plane %s\n", 178 sti_plane_to_str(plane)); 179 180 if (sti_mixer_set_plane_depth(mixer, plane)) { 181 DRM_ERROR("Cannot set plane %s depth\n", 182 sti_plane_to_str(plane)); 183 break; 184 } 185 186 if (sti_mixer_set_plane_status(mixer, plane, true)) { 187 DRM_ERROR("Cannot enable plane %s at mixer\n", 188 sti_plane_to_str(plane)); 189 break; 190 } 191 192 /* if plane is HQVDP_0 then commit the vid[0] */ 193 if (plane->desc == STI_HQVDP_0) 194 sti_vid_commit(compo->vid[0], p->state); 195 196 plane->status = STI_PLANE_READY; 197 198 break; 199 case STI_PLANE_DISABLING: 200 /* disabling sequence for planes tag as disabling */ 201 DRM_DEBUG_DRIVER("disable plane %s from mixer\n", 202 sti_plane_to_str(plane)); 203 204 if (sti_mixer_set_plane_status(mixer, plane, false)) { 205 DRM_ERROR("Cannot disable plane %s at mixer\n", 206 sti_plane_to_str(plane)); 207 continue; 208 } 209 210 if (plane->desc == STI_CURSOR) 211 /* tag plane status for disabled */ 212 plane->status = STI_PLANE_DISABLED; 213 else 214 /* tag plane status for flushing */ 215 plane->status = STI_PLANE_FLUSHING; 216 217 /* if plane is HQVDP_0 then disable the vid[0] */ 218 if (plane->desc == STI_HQVDP_0) 219 sti_vid_disable(compo->vid[0]); 220 221 break; 222 default: 223 /* Other status case are not handled */ 224 break; 225 } 226 } 227 } 228 229 static struct drm_crtc_helper_funcs sti_crtc_helper_funcs = { 230 .enable = sti_crtc_enable, 231 .disable = sti_crtc_disabling, 232 .mode_fixup = sti_crtc_mode_fixup, 233 .mode_set = drm_helper_crtc_mode_set, 234 .mode_set_nofb = sti_crtc_mode_set_nofb, 235 .mode_set_base = drm_helper_crtc_mode_set_base, 236 .atomic_begin = sti_crtc_atomic_begin, 237 .atomic_flush = sti_crtc_atomic_flush, 238 }; 239 240 static void sti_crtc_destroy(struct drm_crtc *crtc) 241 { 242 DRM_DEBUG_KMS("\n"); 243 drm_crtc_cleanup(crtc); 244 } 245 246 static int sti_crtc_set_property(struct drm_crtc *crtc, 247 struct drm_property *property, 248 uint64_t val) 249 { 250 DRM_DEBUG_KMS("\n"); 251 return 0; 252 } 253 254 int sti_crtc_vblank_cb(struct notifier_block *nb, 255 unsigned long event, void *data) 256 { 257 struct drm_device *drm_dev; 258 struct sti_compositor *compo = 259 container_of(nb, struct sti_compositor, vtg_vblank_nb); 260 int *crtc = data; 261 unsigned long flags; 262 struct sti_private *priv; 263 264 drm_dev = compo->mixer[*crtc]->drm_crtc.dev; 265 priv = drm_dev->dev_private; 266 267 if ((event != VTG_TOP_FIELD_EVENT) && 268 (event != VTG_BOTTOM_FIELD_EVENT)) { 269 DRM_ERROR("unknown event: %lu\n", event); 270 return -EINVAL; 271 } 272 273 drm_handle_vblank(drm_dev, *crtc); 274 275 spin_lock_irqsave(&drm_dev->event_lock, flags); 276 if (compo->mixer[*crtc]->pending_event) { 277 drm_send_vblank_event(drm_dev, -1, 278 compo->mixer[*crtc]->pending_event); 279 drm_vblank_put(drm_dev, *crtc); 280 compo->mixer[*crtc]->pending_event = NULL; 281 } 282 spin_unlock_irqrestore(&drm_dev->event_lock, flags); 283 284 if (compo->mixer[*crtc]->status == STI_MIXER_DISABLING) { 285 struct drm_plane *p; 286 287 /* Disable mixer only if all overlay planes (GDP and VDP) 288 * are disabled */ 289 list_for_each_entry(p, &drm_dev->mode_config.plane_list, head) { 290 struct sti_plane *plane = to_sti_plane(p); 291 292 if ((plane->desc & STI_PLANE_TYPE_MASK) <= STI_VDP) 293 if (plane->status != STI_PLANE_DISABLED) 294 return 0; 295 } 296 sti_crtc_disable(&compo->mixer[*crtc]->drm_crtc); 297 } 298 299 return 0; 300 } 301 302 int sti_crtc_enable_vblank(struct drm_device *dev, int crtc) 303 { 304 struct sti_private *dev_priv = dev->dev_private; 305 struct sti_compositor *compo = dev_priv->compo; 306 struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb; 307 308 DRM_DEBUG_DRIVER("\n"); 309 310 if (sti_vtg_register_client(crtc == STI_MIXER_MAIN ? 311 compo->vtg_main : compo->vtg_aux, 312 vtg_vblank_nb, crtc)) { 313 DRM_ERROR("Cannot register VTG notifier\n"); 314 return -EINVAL; 315 } 316 317 return 0; 318 } 319 EXPORT_SYMBOL(sti_crtc_enable_vblank); 320 321 void sti_crtc_disable_vblank(struct drm_device *drm_dev, int crtc) 322 { 323 struct sti_private *priv = drm_dev->dev_private; 324 struct sti_compositor *compo = priv->compo; 325 struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb; 326 327 DRM_DEBUG_DRIVER("\n"); 328 329 if (sti_vtg_unregister_client(crtc == STI_MIXER_MAIN ? 330 compo->vtg_main : compo->vtg_aux, vtg_vblank_nb)) 331 DRM_DEBUG_DRIVER("Warning: cannot unregister VTG notifier\n"); 332 333 /* free the resources of the pending requests */ 334 if (compo->mixer[crtc]->pending_event) { 335 drm_vblank_put(drm_dev, crtc); 336 compo->mixer[crtc]->pending_event = NULL; 337 } 338 } 339 EXPORT_SYMBOL(sti_crtc_disable_vblank); 340 341 static struct drm_crtc_funcs sti_crtc_funcs = { 342 .set_config = drm_atomic_helper_set_config, 343 .page_flip = drm_atomic_helper_page_flip, 344 .destroy = sti_crtc_destroy, 345 .set_property = sti_crtc_set_property, 346 .reset = drm_atomic_helper_crtc_reset, 347 .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state, 348 .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state, 349 }; 350 351 bool sti_crtc_is_main(struct drm_crtc *crtc) 352 { 353 struct sti_mixer *mixer = to_sti_mixer(crtc); 354 355 if (mixer->id == STI_MIXER_MAIN) 356 return true; 357 358 return false; 359 } 360 EXPORT_SYMBOL(sti_crtc_is_main); 361 362 int sti_crtc_init(struct drm_device *drm_dev, struct sti_mixer *mixer, 363 struct drm_plane *primary, struct drm_plane *cursor) 364 { 365 struct drm_crtc *crtc = &mixer->drm_crtc; 366 int res; 367 368 res = drm_crtc_init_with_planes(drm_dev, crtc, primary, cursor, 369 &sti_crtc_funcs); 370 if (res) { 371 DRM_ERROR("Can't initialze CRTC\n"); 372 return -EINVAL; 373 } 374 375 drm_crtc_helper_add(crtc, &sti_crtc_helper_funcs); 376 377 DRM_DEBUG_DRIVER("drm CRTC:%d mapped to %s\n", 378 crtc->base.id, sti_mixer_to_str(mixer)); 379 380 return 0; 381 } 382