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/drm_atomic.h> 12 #include <drm/drm_atomic_helper.h> 13 #include <drm/drm_device.h> 14 #include <drm/drm_plane_helper.h> 15 #include <drm/drm_print.h> 16 #include <drm/drm_probe_helper.h> 17 #include <drm/drm_vblank.h> 18 19 #include "sti_compositor.h" 20 #include "sti_crtc.h" 21 #include "sti_drv.h" 22 #include "sti_vid.h" 23 #include "sti_vtg.h" 24 25 static void sti_crtc_atomic_enable(struct drm_crtc *crtc, 26 struct drm_crtc_state *old_state) 27 { 28 struct sti_mixer *mixer = to_sti_mixer(crtc); 29 30 DRM_DEBUG_DRIVER("\n"); 31 32 mixer->status = STI_MIXER_READY; 33 34 drm_crtc_vblank_on(crtc); 35 } 36 37 static void sti_crtc_atomic_disable(struct drm_crtc *crtc, 38 struct drm_crtc_state *old_state) 39 { 40 struct sti_mixer *mixer = to_sti_mixer(crtc); 41 42 DRM_DEBUG_DRIVER("\n"); 43 44 mixer->status = STI_MIXER_DISABLING; 45 46 drm_crtc_wait_one_vblank(crtc); 47 } 48 49 static int 50 sti_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode) 51 { 52 struct sti_mixer *mixer = to_sti_mixer(crtc); 53 struct device *dev = mixer->dev; 54 struct sti_compositor *compo = dev_get_drvdata(dev); 55 struct clk *compo_clk, *pix_clk; 56 int rate = mode->clock * 1000; 57 58 DRM_DEBUG_KMS("CRTC:%d (%s) mode: (%s)\n", 59 crtc->base.id, sti_mixer_to_str(mixer), mode->name); 60 61 DRM_DEBUG_KMS(DRM_MODE_FMT "\n", DRM_MODE_ARG(mode)); 62 63 if (mixer->id == STI_MIXER_MAIN) { 64 compo_clk = compo->clk_compo_main; 65 pix_clk = compo->clk_pix_main; 66 } else { 67 compo_clk = compo->clk_compo_aux; 68 pix_clk = compo->clk_pix_aux; 69 } 70 71 /* Prepare and enable the compo IP clock */ 72 if (clk_prepare_enable(compo_clk)) { 73 DRM_INFO("Failed to prepare/enable compositor clk\n"); 74 goto compo_error; 75 } 76 77 /* Set rate and prepare/enable pixel clock */ 78 if (clk_set_rate(pix_clk, rate) < 0) { 79 DRM_ERROR("Cannot set rate (%dHz) for pix clk\n", rate); 80 goto pix_error; 81 } 82 if (clk_prepare_enable(pix_clk)) { 83 DRM_ERROR("Failed to prepare/enable pix clk\n"); 84 goto pix_error; 85 } 86 87 sti_vtg_set_config(compo->vtg[mixer->id], &crtc->mode); 88 89 if (sti_mixer_active_video_area(mixer, &crtc->mode)) { 90 DRM_ERROR("Can't set active video area\n"); 91 goto mixer_error; 92 } 93 94 return 0; 95 96 mixer_error: 97 clk_disable_unprepare(pix_clk); 98 pix_error: 99 clk_disable_unprepare(compo_clk); 100 compo_error: 101 return -EINVAL; 102 } 103 104 static void sti_crtc_disable(struct drm_crtc *crtc) 105 { 106 struct sti_mixer *mixer = to_sti_mixer(crtc); 107 struct device *dev = mixer->dev; 108 struct sti_compositor *compo = dev_get_drvdata(dev); 109 110 DRM_DEBUG_KMS("CRTC:%d (%s)\n", crtc->base.id, sti_mixer_to_str(mixer)); 111 112 /* Disable Background */ 113 sti_mixer_set_background_status(mixer, false); 114 115 drm_crtc_vblank_off(crtc); 116 117 /* Disable pixel clock and compo IP clocks */ 118 if (mixer->id == STI_MIXER_MAIN) { 119 clk_disable_unprepare(compo->clk_pix_main); 120 clk_disable_unprepare(compo->clk_compo_main); 121 } else { 122 clk_disable_unprepare(compo->clk_pix_aux); 123 clk_disable_unprepare(compo->clk_compo_aux); 124 } 125 126 mixer->status = STI_MIXER_DISABLED; 127 } 128 129 static void 130 sti_crtc_mode_set_nofb(struct drm_crtc *crtc) 131 { 132 sti_crtc_mode_set(crtc, &crtc->state->adjusted_mode); 133 } 134 135 static void sti_crtc_atomic_flush(struct drm_crtc *crtc, 136 struct drm_crtc_state *old_crtc_state) 137 { 138 struct drm_device *drm_dev = crtc->dev; 139 struct sti_mixer *mixer = to_sti_mixer(crtc); 140 struct sti_compositor *compo = dev_get_drvdata(mixer->dev); 141 struct drm_plane *p; 142 struct drm_pending_vblank_event *event; 143 unsigned long flags; 144 145 DRM_DEBUG_DRIVER("\n"); 146 147 /* perform plane actions */ 148 list_for_each_entry(p, &drm_dev->mode_config.plane_list, head) { 149 struct sti_plane *plane = to_sti_plane(p); 150 151 switch (plane->status) { 152 case STI_PLANE_UPDATED: 153 /* ignore update for other CRTC */ 154 if (p->state->crtc != crtc) 155 continue; 156 157 /* update planes tag as updated */ 158 DRM_DEBUG_DRIVER("update plane %s\n", 159 sti_plane_to_str(plane)); 160 161 if (sti_mixer_set_plane_depth(mixer, plane)) { 162 DRM_ERROR("Cannot set plane %s depth\n", 163 sti_plane_to_str(plane)); 164 break; 165 } 166 167 if (sti_mixer_set_plane_status(mixer, plane, true)) { 168 DRM_ERROR("Cannot enable plane %s at mixer\n", 169 sti_plane_to_str(plane)); 170 break; 171 } 172 173 /* if plane is HQVDP_0 then commit the vid[0] */ 174 if (plane->desc == STI_HQVDP_0) 175 sti_vid_commit(compo->vid[0], p->state); 176 177 plane->status = STI_PLANE_READY; 178 179 break; 180 case STI_PLANE_DISABLING: 181 /* disabling sequence for planes tag as disabling */ 182 DRM_DEBUG_DRIVER("disable plane %s from mixer\n", 183 sti_plane_to_str(plane)); 184 185 if (sti_mixer_set_plane_status(mixer, plane, false)) { 186 DRM_ERROR("Cannot disable plane %s at mixer\n", 187 sti_plane_to_str(plane)); 188 continue; 189 } 190 191 if (plane->desc == STI_CURSOR) 192 /* tag plane status for disabled */ 193 plane->status = STI_PLANE_DISABLED; 194 else 195 /* tag plane status for flushing */ 196 plane->status = STI_PLANE_FLUSHING; 197 198 /* if plane is HQVDP_0 then disable the vid[0] */ 199 if (plane->desc == STI_HQVDP_0) 200 sti_vid_disable(compo->vid[0]); 201 202 break; 203 default: 204 /* Other status case are not handled */ 205 break; 206 } 207 } 208 209 event = crtc->state->event; 210 if (event) { 211 crtc->state->event = NULL; 212 213 spin_lock_irqsave(&crtc->dev->event_lock, flags); 214 if (drm_crtc_vblank_get(crtc) == 0) 215 drm_crtc_arm_vblank_event(crtc, event); 216 else 217 drm_crtc_send_vblank_event(crtc, event); 218 spin_unlock_irqrestore(&crtc->dev->event_lock, flags); 219 } 220 } 221 222 static const struct drm_crtc_helper_funcs sti_crtc_helper_funcs = { 223 .mode_set_nofb = sti_crtc_mode_set_nofb, 224 .atomic_flush = sti_crtc_atomic_flush, 225 .atomic_enable = sti_crtc_atomic_enable, 226 .atomic_disable = sti_crtc_atomic_disable, 227 }; 228 229 static void sti_crtc_destroy(struct drm_crtc *crtc) 230 { 231 DRM_DEBUG_KMS("\n"); 232 drm_crtc_cleanup(crtc); 233 } 234 235 static int sti_crtc_set_property(struct drm_crtc *crtc, 236 struct drm_property *property, 237 uint64_t val) 238 { 239 DRM_DEBUG_KMS("\n"); 240 return 0; 241 } 242 243 int sti_crtc_vblank_cb(struct notifier_block *nb, 244 unsigned long event, void *data) 245 { 246 struct sti_compositor *compo; 247 struct drm_crtc *crtc = data; 248 struct sti_mixer *mixer; 249 unsigned int pipe; 250 251 pipe = drm_crtc_index(crtc); 252 compo = container_of(nb, struct sti_compositor, vtg_vblank_nb[pipe]); 253 mixer = compo->mixer[pipe]; 254 255 if ((event != VTG_TOP_FIELD_EVENT) && 256 (event != VTG_BOTTOM_FIELD_EVENT)) { 257 DRM_ERROR("unknown event: %lu\n", event); 258 return -EINVAL; 259 } 260 261 drm_crtc_handle_vblank(crtc); 262 263 if (mixer->status == STI_MIXER_DISABLING) { 264 struct drm_plane *p; 265 266 /* Disable mixer only if all overlay planes (GDP and VDP) 267 * are disabled */ 268 list_for_each_entry(p, &crtc->dev->mode_config.plane_list, 269 head) { 270 struct sti_plane *plane = to_sti_plane(p); 271 272 if ((plane->desc & STI_PLANE_TYPE_MASK) <= STI_VDP) 273 if (plane->status != STI_PLANE_DISABLED) 274 return 0; 275 } 276 sti_crtc_disable(crtc); 277 } 278 279 return 0; 280 } 281 282 int sti_crtc_enable_vblank(struct drm_device *dev, unsigned int pipe) 283 { 284 struct sti_private *dev_priv = dev->dev_private; 285 struct sti_compositor *compo = dev_priv->compo; 286 struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb[pipe]; 287 struct drm_crtc *crtc = &compo->mixer[pipe]->drm_crtc; 288 struct sti_vtg *vtg = compo->vtg[pipe]; 289 290 DRM_DEBUG_DRIVER("\n"); 291 292 if (sti_vtg_register_client(vtg, vtg_vblank_nb, crtc)) { 293 DRM_ERROR("Cannot register VTG notifier\n"); 294 return -EINVAL; 295 } 296 297 return 0; 298 } 299 300 void sti_crtc_disable_vblank(struct drm_device *drm_dev, unsigned int pipe) 301 { 302 struct sti_private *priv = drm_dev->dev_private; 303 struct sti_compositor *compo = priv->compo; 304 struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb[pipe]; 305 struct sti_vtg *vtg = compo->vtg[pipe]; 306 307 DRM_DEBUG_DRIVER("\n"); 308 309 if (sti_vtg_unregister_client(vtg, vtg_vblank_nb)) 310 DRM_DEBUG_DRIVER("Warning: cannot unregister VTG notifier\n"); 311 } 312 313 static int sti_crtc_late_register(struct drm_crtc *crtc) 314 { 315 struct sti_mixer *mixer = to_sti_mixer(crtc); 316 struct sti_compositor *compo = dev_get_drvdata(mixer->dev); 317 318 if (drm_crtc_index(crtc) == 0) 319 return sti_compositor_debugfs_init(compo, crtc->dev->primary); 320 321 return 0; 322 } 323 324 static const struct drm_crtc_funcs sti_crtc_funcs = { 325 .set_config = drm_atomic_helper_set_config, 326 .page_flip = drm_atomic_helper_page_flip, 327 .destroy = sti_crtc_destroy, 328 .set_property = sti_crtc_set_property, 329 .reset = drm_atomic_helper_crtc_reset, 330 .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state, 331 .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state, 332 .late_register = sti_crtc_late_register, 333 }; 334 335 bool sti_crtc_is_main(struct drm_crtc *crtc) 336 { 337 struct sti_mixer *mixer = to_sti_mixer(crtc); 338 339 if (mixer->id == STI_MIXER_MAIN) 340 return true; 341 342 return false; 343 } 344 345 int sti_crtc_init(struct drm_device *drm_dev, struct sti_mixer *mixer, 346 struct drm_plane *primary, struct drm_plane *cursor) 347 { 348 struct drm_crtc *crtc = &mixer->drm_crtc; 349 int res; 350 351 res = drm_crtc_init_with_planes(drm_dev, crtc, primary, cursor, 352 &sti_crtc_funcs, NULL); 353 if (res) { 354 DRM_ERROR("Can't initialize CRTC\n"); 355 return -EINVAL; 356 } 357 358 drm_crtc_helper_add(crtc, &sti_crtc_helper_funcs); 359 360 DRM_DEBUG_DRIVER("drm CRTC:%d mapped to %s\n", 361 crtc->base.id, sti_mixer_to_str(mixer)); 362 363 return 0; 364 } 365