drivers/gpu/drm/sti/sti_crtc.c

   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(compo->vtg[mixer->id], &crtc->mode);
  90
  91         if (sti_mixer_active_video_area(mixer, &crtc->mode)) {
  92                 DRM_ERROR("Can't set active video area\n");
  93                 goto mixer_error;
  94         }
  95
  96         return 0;
  97
  98 mixer_error:
  99         clk_disable_unprepare(pix_clk);
 100 pix_error:
 101         clk_disable_unprepare(compo_clk);
 102 compo_error:
 103         return -EINVAL;
 104 }
 105
 106 static void sti_crtc_disable(struct drm_crtc *crtc)
 107 {
 108         struct sti_mixer *mixer = to_sti_mixer(crtc);
 109         struct device *dev = mixer->dev;
 110         struct sti_compositor *compo = dev_get_drvdata(dev);
 111
 112         DRM_DEBUG_KMS("CRTC:%d (%s)\n", crtc->base.id, sti_mixer_to_str(mixer));
 113
 114         /* Disable Background */
 115         sti_mixer_set_background_status(mixer, false);
 116
 117         drm_crtc_vblank_off(crtc);
 118
 119         /* Disable pixel clock and compo IP clocks */
 120         if (mixer->id == STI_MIXER_MAIN) {
 121                 clk_disable_unprepare(compo->clk_pix_main);
 122                 clk_disable_unprepare(compo->clk_compo_main);
 123         } else {
 124                 clk_disable_unprepare(compo->clk_pix_aux);
 125                 clk_disable_unprepare(compo->clk_compo_aux);
 126         }
 127
 128         mixer->status = STI_MIXER_DISABLED;
 129 }
 130
 131 static void
 132 sti_crtc_mode_set_nofb(struct drm_crtc *crtc)
 133 {
 134         sti_crtc_mode_set(crtc, &crtc->state->adjusted_mode);
 135 }
 136
 137 static void sti_crtc_atomic_begin(struct drm_crtc *crtc,
 138                                   struct drm_crtc_state *old_crtc_state)
 139 {
 140         struct sti_mixer *mixer = to_sti_mixer(crtc);
 141
 142         if (crtc->state->event) {
 143                 crtc->state->event->pipe = drm_crtc_index(crtc);
 144
 145                 WARN_ON(drm_crtc_vblank_get(crtc) != 0);
 146
 147                 mixer->pending_event = crtc->state->event;
 148                 crtc->state->event = NULL;
 149         }
 150 }
 151
 152 static void sti_crtc_atomic_flush(struct drm_crtc *crtc,
 153                                   struct drm_crtc_state *old_crtc_state)
 154 {
 155         struct drm_device *drm_dev = crtc->dev;
 156         struct sti_mixer *mixer = to_sti_mixer(crtc);
 157         struct sti_compositor *compo = dev_get_drvdata(mixer->dev);
 158         struct drm_plane *p;
 159
 160         DRM_DEBUG_DRIVER("\n");
 161
 162         /* perform plane actions */
 163         list_for_each_entry(p, &drm_dev->mode_config.plane_list, head) {
 164                 struct sti_plane *plane = to_sti_plane(p);
 165
 166                 switch (plane->status) {
 167                 case STI_PLANE_UPDATED:
 168                         /* ignore update for other CRTC */
 169                         if (p->state->crtc != crtc)
 170                                 continue;
 171
 172                         /* update planes tag as updated */
 173                         DRM_DEBUG_DRIVER("update plane %s\n",
 174                                          sti_plane_to_str(plane));
 175
 176                         if (sti_mixer_set_plane_depth(mixer, plane)) {
 177                                 DRM_ERROR("Cannot set plane %s depth\n",
 178                                           sti_plane_to_str(plane));
 179                                 break;
 180                         }
 181
 182                         if (sti_mixer_set_plane_status(mixer, plane, true)) {
 183                                 DRM_ERROR("Cannot enable plane %s at mixer\n",
 184                                           sti_plane_to_str(plane));
 185                                 break;
 186                         }
 187
 188                         /* if plane is HQVDP_0 then commit the vid[0] */
 189                         if (plane->desc == STI_HQVDP_0)
 190                                 sti_vid_commit(compo->vid[0], p->state);
 191
 192                         plane->status = STI_PLANE_READY;
 193
 194                         break;
 195                 case STI_PLANE_DISABLING:
 196                         /* disabling sequence for planes tag as disabling */
 197                         DRM_DEBUG_DRIVER("disable plane %s from mixer\n",
 198                                          sti_plane_to_str(plane));
 199
 200                         if (sti_mixer_set_plane_status(mixer, plane, false)) {
 201                                 DRM_ERROR("Cannot disable plane %s at mixer\n",
 202                                           sti_plane_to_str(plane));
 203                                 continue;
 204                         }
 205
 206                         if (plane->desc == STI_CURSOR)
 207                                 /* tag plane status for disabled */
 208                                 plane->status = STI_PLANE_DISABLED;
 209                         else
 210                                 /* tag plane status for flushing */
 211                                 plane->status = STI_PLANE_FLUSHING;
 212
 213                         /* if plane is HQVDP_0 then disable the vid[0] */
 214                         if (plane->desc == STI_HQVDP_0)
 215                                 sti_vid_disable(compo->vid[0]);
 216
 217                         break;
 218                 default:
 219                         /* Other status case are not handled */
 220                         break;
 221                 }
 222         }
 223 }
 224
 225 static const struct drm_crtc_helper_funcs sti_crtc_helper_funcs = {
 226         .enable = sti_crtc_enable,
 227         .disable = sti_crtc_disabling,
 228         .mode_set_nofb = sti_crtc_mode_set_nofb,
 229         .atomic_begin = sti_crtc_atomic_begin,
 230         .atomic_flush = sti_crtc_atomic_flush,
 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         unsigned long flags;
 254         struct sti_private *priv;
 255         unsigned int pipe;
 256
 257         priv = crtc->dev->dev_private;
 258         pipe = drm_crtc_index(crtc);
 259         compo = container_of(nb, struct sti_compositor, vtg_vblank_nb[pipe]);
 260         mixer = compo->mixer[pipe];
 261
 262         if ((event != VTG_TOP_FIELD_EVENT) &&
 263             (event != VTG_BOTTOM_FIELD_EVENT)) {
 264                 DRM_ERROR("unknown event: %lu\n", event);
 265                 return -EINVAL;
 266         }
 267
 268         drm_crtc_handle_vblank(crtc);
 269
 270         spin_lock_irqsave(&crtc->dev->event_lock, flags);
 271         if (mixer->pending_event) {
 272                 drm_crtc_send_vblank_event(crtc, mixer->pending_event);
 273                 drm_crtc_vblank_put(crtc);
 274                 mixer->pending_event = NULL;
 275         }
 276         spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
 277
 278         if (mixer->status == STI_MIXER_DISABLING) {
 279                 struct drm_plane *p;
 280
 281                 /* Disable mixer only if all overlay planes (GDP and VDP)
 282                  * are disabled */
 283                 list_for_each_entry(p, &crtc->dev->mode_config.plane_list,
 284                                     head) {
 285                         struct sti_plane *plane = to_sti_plane(p);
 286
 287                         if ((plane->desc & STI_PLANE_TYPE_MASK) <= STI_VDP)
 288                                 if (plane->status != STI_PLANE_DISABLED)
 289                                         return 0;
 290                 }
 291                 sti_crtc_disable(crtc);
 292         }
 293
 294         return 0;
 295 }
 296
 297 int sti_crtc_enable_vblank(struct drm_device *dev, unsigned int pipe)
 298 {
 299         struct sti_private *dev_priv = dev->dev_private;
 300         struct sti_compositor *compo = dev_priv->compo;
 301         struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb[pipe];
 302         struct drm_crtc *crtc = &compo->mixer[pipe]->drm_crtc;
 303         struct sti_vtg *vtg = compo->vtg[pipe];
 304
 305         DRM_DEBUG_DRIVER("\n");
 306
 307         if (sti_vtg_register_client(vtg, vtg_vblank_nb, crtc)) {
 308                 DRM_ERROR("Cannot register VTG notifier\n");
 309                 return -EINVAL;
 310         }
 311
 312         return 0;
 313 }
 314
 315 void sti_crtc_disable_vblank(struct drm_device *drm_dev, unsigned int pipe)
 316 {
 317         struct sti_private *priv = drm_dev->dev_private;
 318         struct sti_compositor *compo = priv->compo;
 319         struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb[pipe];
 320         struct drm_crtc *crtc = &compo->mixer[pipe]->drm_crtc;
 321         struct sti_vtg *vtg = compo->vtg[pipe];
 322
 323         DRM_DEBUG_DRIVER("\n");
 324
 325         if (sti_vtg_unregister_client(vtg, vtg_vblank_nb))
 326                 DRM_DEBUG_DRIVER("Warning: cannot unregister VTG notifier\n");
 327
 328         /* free the resources of the pending requests */
 329         if (compo->mixer[pipe]->pending_event) {
 330                 drm_crtc_vblank_put(crtc);
 331                 compo->mixer[pipe]->pending_event = NULL;
 332         }
 333 }
 334
 335 static int sti_crtc_late_register(struct drm_crtc *crtc)
 336 {
 337         struct sti_mixer *mixer = to_sti_mixer(crtc);
 338         struct sti_compositor *compo = dev_get_drvdata(mixer->dev);
 339
 340         if (drm_crtc_index(crtc) == 0)
 341                 return sti_compositor_debugfs_init(compo, crtc->dev->primary);
 342
 343         return 0;
 344 }
 345
 346 static const struct drm_crtc_funcs sti_crtc_funcs = {
 347         .set_config = drm_atomic_helper_set_config,
 348         .page_flip = drm_atomic_helper_page_flip,
 349         .destroy = sti_crtc_destroy,
 350         .set_property = sti_crtc_set_property,
 351         .reset = drm_atomic_helper_crtc_reset,
 352         .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
 353         .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
 354         .late_register = sti_crtc_late_register,
 355 };
 356
 357 bool sti_crtc_is_main(struct drm_crtc *crtc)
 358 {
 359         struct sti_mixer *mixer = to_sti_mixer(crtc);
 360
 361         if (mixer->id == STI_MIXER_MAIN)
 362                 return true;
 363
 364         return false;
 365 }
 366
 367 int sti_crtc_init(struct drm_device *drm_dev, struct sti_mixer *mixer,
 368                   struct drm_plane *primary, struct drm_plane *cursor)
 369 {
 370         struct drm_crtc *crtc = &mixer->drm_crtc;
 371         int res;
 372
 373         res = drm_crtc_init_with_planes(drm_dev, crtc, primary, cursor,
 374                                         &sti_crtc_funcs, NULL);
 375         if (res) {
 376                 DRM_ERROR("Can't initialze CRTC\n");
 377                 return -EINVAL;
 378         }
 379
 380         drm_crtc_helper_add(crtc, &sti_crtc_helper_funcs);
 381
 382         DRM_DEBUG_DRIVER("drm CRTC:%d mapped to %s\n",
 383                          crtc->base.id, sti_mixer_to_str(mixer));
 384
 385         return 0;
 386 }