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 23 static 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 35 static 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 45 static int 46 sti_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; 99 100 mixer_error: 101 clk_disable_unprepare(pix_clk); 102 pix_error: 103 clk_disable_unprepare(compo_clk); 104 compo_error: 105 return -EINVAL; 106 } 107 108 static 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 } 132 133 static void 134 sti_crtc_mode_set_nofb(struct drm_crtc *crtc) 135 { 136 sti_crtc_mode_set(crtc, &crtc->state->adjusted_mode); 137 } 138 139 static 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 } 225 226 static 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 }; 232 233 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 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 } 287 288 int 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 } 305 306 void 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 } 318 319 static 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 } 329 330 static 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 }; 340 341 bool 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 } 350 351 int 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 initialize 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 } 371