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_plane_helper.h> 15 #include <drm/drm_probe_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 drm_crtc_wait_one_vblank(crtc); 45 } 46 47 static int 48 sti_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode) 49 { 50 struct sti_mixer *mixer = to_sti_mixer(crtc); 51 struct device *dev = mixer->dev; 52 struct sti_compositor *compo = dev_get_drvdata(dev); 53 struct clk *compo_clk, *pix_clk; 54 int rate = mode->clock * 1000; 55 56 DRM_DEBUG_KMS("CRTC:%d (%s) mode: (%s)\n", 57 crtc->base.id, sti_mixer_to_str(mixer), mode->name); 58 59 DRM_DEBUG_KMS(DRM_MODE_FMT "\n", DRM_MODE_ARG(mode)); 60 61 if (mixer->id == STI_MIXER_MAIN) { 62 compo_clk = compo->clk_compo_main; 63 pix_clk = compo->clk_pix_main; 64 } else { 65 compo_clk = compo->clk_compo_aux; 66 pix_clk = compo->clk_pix_aux; 67 } 68 69 /* Prepare and enable the compo IP clock */ 70 if (clk_prepare_enable(compo_clk)) { 71 DRM_INFO("Failed to prepare/enable compositor clk\n"); 72 goto compo_error; 73 } 74 75 /* Set rate and prepare/enable pixel clock */ 76 if (clk_set_rate(pix_clk, rate) < 0) { 77 DRM_ERROR("Cannot set rate (%dHz) for pix clk\n", rate); 78 goto pix_error; 79 } 80 if (clk_prepare_enable(pix_clk)) { 81 DRM_ERROR("Failed to prepare/enable pix clk\n"); 82 goto pix_error; 83 } 84 85 sti_vtg_set_config(compo->vtg[mixer->id], &crtc->mode); 86 87 if (sti_mixer_active_video_area(mixer, &crtc->mode)) { 88 DRM_ERROR("Can't set active video area\n"); 89 goto mixer_error; 90 } 91 92 return 0; 93 94 mixer_error: 95 clk_disable_unprepare(pix_clk); 96 pix_error: 97 clk_disable_unprepare(compo_clk); 98 compo_error: 99 return -EINVAL; 100 } 101 102 static void sti_crtc_disable(struct drm_crtc *crtc) 103 { 104 struct sti_mixer *mixer = to_sti_mixer(crtc); 105 struct device *dev = mixer->dev; 106 struct sti_compositor *compo = dev_get_drvdata(dev); 107 108 DRM_DEBUG_KMS("CRTC:%d (%s)\n", crtc->base.id, sti_mixer_to_str(mixer)); 109 110 /* Disable Background */ 111 sti_mixer_set_background_status(mixer, false); 112 113 drm_crtc_vblank_off(crtc); 114 115 /* Disable pixel clock and compo IP clocks */ 116 if (mixer->id == STI_MIXER_MAIN) { 117 clk_disable_unprepare(compo->clk_pix_main); 118 clk_disable_unprepare(compo->clk_compo_main); 119 } else { 120 clk_disable_unprepare(compo->clk_pix_aux); 121 clk_disable_unprepare(compo->clk_compo_aux); 122 } 123 124 mixer->status = STI_MIXER_DISABLED; 125 } 126 127 static void 128 sti_crtc_mode_set_nofb(struct drm_crtc *crtc) 129 { 130 sti_crtc_mode_set(crtc, &crtc->state->adjusted_mode); 131 } 132 133 static void sti_crtc_atomic_flush(struct drm_crtc *crtc, 134 struct drm_crtc_state *old_crtc_state) 135 { 136 struct drm_device *drm_dev = crtc->dev; 137 struct sti_mixer *mixer = to_sti_mixer(crtc); 138 struct sti_compositor *compo = dev_get_drvdata(mixer->dev); 139 struct drm_plane *p; 140 struct drm_pending_vblank_event *event; 141 unsigned long flags; 142 143 DRM_DEBUG_DRIVER("\n"); 144 145 /* perform plane actions */ 146 list_for_each_entry(p, &drm_dev->mode_config.plane_list, head) { 147 struct sti_plane *plane = to_sti_plane(p); 148 149 switch (plane->status) { 150 case STI_PLANE_UPDATED: 151 /* ignore update for other CRTC */ 152 if (p->state->crtc != crtc) 153 continue; 154 155 /* update planes tag as updated */ 156 DRM_DEBUG_DRIVER("update plane %s\n", 157 sti_plane_to_str(plane)); 158 159 if (sti_mixer_set_plane_depth(mixer, plane)) { 160 DRM_ERROR("Cannot set plane %s depth\n", 161 sti_plane_to_str(plane)); 162 break; 163 } 164 165 if (sti_mixer_set_plane_status(mixer, plane, true)) { 166 DRM_ERROR("Cannot enable plane %s at mixer\n", 167 sti_plane_to_str(plane)); 168 break; 169 } 170 171 /* if plane is HQVDP_0 then commit the vid[0] */ 172 if (plane->desc == STI_HQVDP_0) 173 sti_vid_commit(compo->vid[0], p->state); 174 175 plane->status = STI_PLANE_READY; 176 177 break; 178 case STI_PLANE_DISABLING: 179 /* disabling sequence for planes tag as disabling */ 180 DRM_DEBUG_DRIVER("disable plane %s from mixer\n", 181 sti_plane_to_str(plane)); 182 183 if (sti_mixer_set_plane_status(mixer, plane, false)) { 184 DRM_ERROR("Cannot disable plane %s at mixer\n", 185 sti_plane_to_str(plane)); 186 continue; 187 } 188 189 if (plane->desc == STI_CURSOR) 190 /* tag plane status for disabled */ 191 plane->status = STI_PLANE_DISABLED; 192 else 193 /* tag plane status for flushing */ 194 plane->status = STI_PLANE_FLUSHING; 195 196 /* if plane is HQVDP_0 then disable the vid[0] */ 197 if (plane->desc == STI_HQVDP_0) 198 sti_vid_disable(compo->vid[0]); 199 200 break; 201 default: 202 /* Other status case are not handled */ 203 break; 204 } 205 } 206 207 event = crtc->state->event; 208 if (event) { 209 crtc->state->event = NULL; 210 211 spin_lock_irqsave(&crtc->dev->event_lock, flags); 212 if (drm_crtc_vblank_get(crtc) == 0) 213 drm_crtc_arm_vblank_event(crtc, event); 214 else 215 drm_crtc_send_vblank_event(crtc, event); 216 spin_unlock_irqrestore(&crtc->dev->event_lock, flags); 217 } 218 } 219 220 static const struct drm_crtc_helper_funcs sti_crtc_helper_funcs = { 221 .mode_set_nofb = sti_crtc_mode_set_nofb, 222 .atomic_flush = sti_crtc_atomic_flush, 223 .atomic_enable = sti_crtc_atomic_enable, 224 .atomic_disable = sti_crtc_atomic_disable, 225 }; 226 227 static void sti_crtc_destroy(struct drm_crtc *crtc) 228 { 229 DRM_DEBUG_KMS("\n"); 230 drm_crtc_cleanup(crtc); 231 } 232 233 static int sti_crtc_set_property(struct drm_crtc *crtc, 234 struct drm_property *property, 235 uint64_t val) 236 { 237 DRM_DEBUG_KMS("\n"); 238 return 0; 239 } 240 241 int sti_crtc_vblank_cb(struct notifier_block *nb, 242 unsigned long event, void *data) 243 { 244 struct sti_compositor *compo; 245 struct drm_crtc *crtc = data; 246 struct sti_mixer *mixer; 247 unsigned int pipe; 248 249 pipe = drm_crtc_index(crtc); 250 compo = container_of(nb, struct sti_compositor, vtg_vblank_nb[pipe]); 251 mixer = compo->mixer[pipe]; 252 253 if ((event != VTG_TOP_FIELD_EVENT) && 254 (event != VTG_BOTTOM_FIELD_EVENT)) { 255 DRM_ERROR("unknown event: %lu\n", event); 256 return -EINVAL; 257 } 258 259 drm_crtc_handle_vblank(crtc); 260 261 if (mixer->status == STI_MIXER_DISABLING) { 262 struct drm_plane *p; 263 264 /* Disable mixer only if all overlay planes (GDP and VDP) 265 * are disabled */ 266 list_for_each_entry(p, &crtc->dev->mode_config.plane_list, 267 head) { 268 struct sti_plane *plane = to_sti_plane(p); 269 270 if ((plane->desc & STI_PLANE_TYPE_MASK) <= STI_VDP) 271 if (plane->status != STI_PLANE_DISABLED) 272 return 0; 273 } 274 sti_crtc_disable(crtc); 275 } 276 277 return 0; 278 } 279 280 int sti_crtc_enable_vblank(struct drm_device *dev, unsigned int pipe) 281 { 282 struct sti_private *dev_priv = dev->dev_private; 283 struct sti_compositor *compo = dev_priv->compo; 284 struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb[pipe]; 285 struct drm_crtc *crtc = &compo->mixer[pipe]->drm_crtc; 286 struct sti_vtg *vtg = compo->vtg[pipe]; 287 288 DRM_DEBUG_DRIVER("\n"); 289 290 if (sti_vtg_register_client(vtg, vtg_vblank_nb, crtc)) { 291 DRM_ERROR("Cannot register VTG notifier\n"); 292 return -EINVAL; 293 } 294 295 return 0; 296 } 297 298 void sti_crtc_disable_vblank(struct drm_device *drm_dev, unsigned int pipe) 299 { 300 struct sti_private *priv = drm_dev->dev_private; 301 struct sti_compositor *compo = priv->compo; 302 struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb[pipe]; 303 struct sti_vtg *vtg = compo->vtg[pipe]; 304 305 DRM_DEBUG_DRIVER("\n"); 306 307 if (sti_vtg_unregister_client(vtg, vtg_vblank_nb)) 308 DRM_DEBUG_DRIVER("Warning: cannot unregister VTG notifier\n"); 309 } 310 311 static int sti_crtc_late_register(struct drm_crtc *crtc) 312 { 313 struct sti_mixer *mixer = to_sti_mixer(crtc); 314 struct sti_compositor *compo = dev_get_drvdata(mixer->dev); 315 316 if (drm_crtc_index(crtc) == 0) 317 return sti_compositor_debugfs_init(compo, crtc->dev->primary); 318 319 return 0; 320 } 321 322 static const struct drm_crtc_funcs sti_crtc_funcs = { 323 .set_config = drm_atomic_helper_set_config, 324 .page_flip = drm_atomic_helper_page_flip, 325 .destroy = sti_crtc_destroy, 326 .set_property = sti_crtc_set_property, 327 .reset = drm_atomic_helper_crtc_reset, 328 .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state, 329 .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state, 330 .late_register = sti_crtc_late_register, 331 }; 332 333 bool sti_crtc_is_main(struct drm_crtc *crtc) 334 { 335 struct sti_mixer *mixer = to_sti_mixer(crtc); 336 337 if (mixer->id == STI_MIXER_MAIN) 338 return true; 339 340 return false; 341 } 342 343 int sti_crtc_init(struct drm_device *drm_dev, struct sti_mixer *mixer, 344 struct drm_plane *primary, struct drm_plane *cursor) 345 { 346 struct drm_crtc *crtc = &mixer->drm_crtc; 347 int res; 348 349 res = drm_crtc_init_with_planes(drm_dev, crtc, primary, cursor, 350 &sti_crtc_funcs, NULL); 351 if (res) { 352 DRM_ERROR("Can't initialize CRTC\n"); 353 return -EINVAL; 354 } 355 356 drm_crtc_helper_add(crtc, &sti_crtc_helper_funcs); 357 358 DRM_DEBUG_DRIVER("drm CRTC:%d mapped to %s\n", 359 crtc->base.id, sti_mixer_to_str(mixer)); 360 361 return 0; 362 } 363