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(mixer->id == STI_MIXER_MAIN ?
  90                         compo->vtg_main : compo->vtg_aux, &crtc->mode);
  91
  92         if (sti_mixer_active_video_area(mixer, &crtc->mode)) {
  93                 DRM_ERROR("Can't set active video area\n");
  94                 goto mixer_error;
  95         }
  96
  97         return 0;
  98
  99 mixer_error:
 100         clk_disable_unprepare(pix_clk);
 101 pix_error:
 102         clk_disable_unprepare(compo_clk);
 103 compo_error:
 104         return -EINVAL;
 105 }
 106
 107 static void sti_crtc_disable(struct drm_crtc *crtc)
 108 {
 109         struct sti_mixer *mixer = to_sti_mixer(crtc);
 110         struct device *dev = mixer->dev;
 111         struct sti_compositor *compo = dev_get_drvdata(dev);
 112
 113         DRM_DEBUG_KMS("CRTC:%d (%s)\n", crtc->base.id, sti_mixer_to_str(mixer));
 114
 115         /* Disable Background */
 116         sti_mixer_set_background_status(mixer, false);
 117
 118         drm_crtc_vblank_off(crtc);
 119
 120         /* Disable pixel clock and compo IP clocks */
 121         if (mixer->id == STI_MIXER_MAIN) {
 122                 clk_disable_unprepare(compo->clk_pix_main);
 123                 clk_disable_unprepare(compo->clk_compo_main);
 124         } else {
 125                 clk_disable_unprepare(compo->clk_pix_aux);
 126                 clk_disable_unprepare(compo->clk_compo_aux);
 127         }
 128
 129         mixer->status = STI_MIXER_DISABLED;
 130 }
 131
 132 static void
 133 sti_crtc_mode_set_nofb(struct drm_crtc *crtc)
 134 {
 135         sti_crtc_mode_set(crtc, &crtc->state->adjusted_mode);
 136 }
 137
 138 static void sti_crtc_atomic_begin(struct drm_crtc *crtc,
 139                                   struct drm_crtc_state *old_crtc_state)
 140 {
 141         struct sti_mixer *mixer = to_sti_mixer(crtc);
 142
 143         if (crtc->state->event) {
 144                 crtc->state->event->pipe = drm_crtc_index(crtc);
 145
 146                 WARN_ON(drm_crtc_vblank_get(crtc) != 0);
 147
 148                 mixer->pending_event = crtc->state->event;
 149                 crtc->state->event = NULL;
 150         }
 151 }
 152
 153 static void sti_crtc_atomic_flush(struct drm_crtc *crtc,
 154                                   struct drm_crtc_state *old_crtc_state)
 155 {
 156         struct drm_device *drm_dev = crtc->dev;
 157         struct sti_mixer *mixer = to_sti_mixer(crtc);
 158         struct sti_compositor *compo = dev_get_drvdata(mixer->dev);
 159         struct drm_plane *p;
 160
 161         DRM_DEBUG_DRIVER("\n");
 162
 163         /* perform plane actions */
 164         list_for_each_entry(p, &drm_dev->mode_config.plane_list, head) {
 165                 struct sti_plane *plane = to_sti_plane(p);
 166
 167                 switch (plane->status) {
 168                 case STI_PLANE_UPDATED:
 169                         /* update planes tag as updated */
 170                         DRM_DEBUG_DRIVER("update plane %s\n",
 171                                          sti_plane_to_str(plane));
 172
 173                         if (sti_mixer_set_plane_depth(mixer, plane)) {
 174                                 DRM_ERROR("Cannot set plane %s depth\n",
 175                                           sti_plane_to_str(plane));
 176                                 break;
 177                         }
 178
 179                         if (sti_mixer_set_plane_status(mixer, plane, true)) {
 180                                 DRM_ERROR("Cannot enable plane %s at mixer\n",
 181                                           sti_plane_to_str(plane));
 182                                 break;
 183                         }
 184
 185                         /* if plane is HQVDP_0 then commit the vid[0] */
 186                         if (plane->desc == STI_HQVDP_0)
 187                                 sti_vid_commit(compo->vid[0], p->state);
 188
 189                         plane->status = STI_PLANE_READY;
 190
 191                         break;
 192                 case STI_PLANE_DISABLING:
 193                         /* disabling sequence for planes tag as disabling */
 194                         DRM_DEBUG_DRIVER("disable plane %s from mixer\n",
 195                                          sti_plane_to_str(plane));
 196
 197                         if (sti_mixer_set_plane_status(mixer, plane, false)) {
 198                                 DRM_ERROR("Cannot disable plane %s at mixer\n",
 199                                           sti_plane_to_str(plane));
 200                                 continue;
 201                         }
 202
 203                         if (plane->desc == STI_CURSOR)
 204                                 /* tag plane status for disabled */
 205                                 plane->status = STI_PLANE_DISABLED;
 206                         else
 207                                 /* tag plane status for flushing */
 208                                 plane->status = STI_PLANE_FLUSHING;
 209
 210                         /* if plane is HQVDP_0 then disable the vid[0] */
 211                         if (plane->desc == STI_HQVDP_0)
 212                                 sti_vid_disable(compo->vid[0]);
 213
 214                         break;
 215                 default:
 216                         /* Other status case are not handled */
 217                         break;
 218                 }
 219         }
 220 }
 221
 222 static const struct drm_crtc_helper_funcs sti_crtc_helper_funcs = {
 223         .enable = sti_crtc_enable,
 224         .disable = sti_crtc_disabling,
 225         .mode_set_nofb = sti_crtc_mode_set_nofb,
 226         .atomic_begin = sti_crtc_atomic_begin,
 227         .atomic_flush = sti_crtc_atomic_flush,
 228 };
 229
 230 static void sti_crtc_destroy(struct drm_crtc *crtc)
 231 {
 232         DRM_DEBUG_KMS("\n");
 233         drm_crtc_cleanup(crtc);
 234 }
 235
 236 static int sti_crtc_set_property(struct drm_crtc *crtc,
 237                                  struct drm_property *property,
 238                                  uint64_t val)
 239 {
 240         DRM_DEBUG_KMS("\n");
 241         return 0;
 242 }
 243
 244 int sti_crtc_vblank_cb(struct notifier_block *nb,
 245                        unsigned long event, void *data)
 246 {
 247         struct sti_compositor *compo =
 248                 container_of(nb, struct sti_compositor, vtg_vblank_nb);
 249         struct drm_crtc *crtc = data;
 250         struct sti_mixer *mixer;
 251         unsigned long flags;
 252         struct sti_private *priv;
 253         unsigned int pipe;
 254
 255         priv = crtc->dev->dev_private;
 256         pipe = drm_crtc_index(crtc);
 257         mixer = compo->mixer[pipe];
 258
 259         if ((event != VTG_TOP_FIELD_EVENT) &&
 260             (event != VTG_BOTTOM_FIELD_EVENT)) {
 261                 DRM_ERROR("unknown event: %lu\n", event);
 262                 return -EINVAL;
 263         }
 264
 265         drm_crtc_handle_vblank(crtc);
 266
 267         spin_lock_irqsave(&crtc->dev->event_lock, flags);
 268         if (mixer->pending_event) {
 269                 drm_crtc_send_vblank_event(crtc, mixer->pending_event);
 270                 drm_crtc_vblank_put(crtc);
 271                 mixer->pending_event = NULL;
 272         }
 273         spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
 274
 275         if (mixer->status == STI_MIXER_DISABLING) {
 276                 struct drm_plane *p;
 277
 278                 /* Disable mixer only if all overlay planes (GDP and VDP)
 279                  * are disabled */
 280                 list_for_each_entry(p, &crtc->dev->mode_config.plane_list,
 281                                     head) {
 282                         struct sti_plane *plane = to_sti_plane(p);
 283
 284                         if ((plane->desc & STI_PLANE_TYPE_MASK) <= STI_VDP)
 285                                 if (plane->status != STI_PLANE_DISABLED)
 286                                         return 0;
 287                 }
 288                 sti_crtc_disable(crtc);
 289         }
 290
 291         return 0;
 292 }
 293
 294 int sti_crtc_enable_vblank(struct drm_device *dev, unsigned int pipe)
 295 {
 296         struct sti_private *dev_priv = dev->dev_private;
 297         struct sti_compositor *compo = dev_priv->compo;
 298         struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb;
 299         struct drm_crtc *crtc = &compo->mixer[pipe]->drm_crtc;
 300
 301         DRM_DEBUG_DRIVER("\n");
 302
 303         if (sti_vtg_register_client(pipe == STI_MIXER_MAIN ?
 304                         compo->vtg_main : compo->vtg_aux,
 305                         vtg_vblank_nb, crtc)) {
 306                 DRM_ERROR("Cannot register VTG notifier\n");
 307                 return -EINVAL;
 308         }
 309
 310         return 0;
 311 }
 312
 313 void sti_crtc_disable_vblank(struct drm_device *drm_dev, unsigned int pipe)
 314 {
 315         struct sti_private *priv = drm_dev->dev_private;
 316         struct sti_compositor *compo = priv->compo;
 317         struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb;
 318         struct drm_crtc *crtc = &compo->mixer[pipe]->drm_crtc;
 319
 320         DRM_DEBUG_DRIVER("\n");
 321
 322         if (sti_vtg_unregister_client(pipe == STI_MIXER_MAIN ?
 323                         compo->vtg_main : compo->vtg_aux, vtg_vblank_nb))
 324                 DRM_DEBUG_DRIVER("Warning: cannot unregister VTG notifier\n");
 325
 326         /* free the resources of the pending requests */
 327         if (compo->mixer[pipe]->pending_event) {
 328                 drm_crtc_vblank_put(crtc);
 329                 compo->mixer[pipe]->pending_event = NULL;
 330         }
 331 }
 332
 333 static int sti_crtc_late_register(struct drm_crtc *crtc)
 334 {
 335         struct sti_mixer *mixer = to_sti_mixer(crtc);
 336         struct sti_compositor *compo = dev_get_drvdata(mixer->dev);
 337
 338         if (drm_crtc_index(crtc) == 0)
 339                 return sti_compositor_debufs_init(compo, crtc->dev->primary);
 340
 341         return 0;
 342 }
 343
 344 static const struct drm_crtc_funcs sti_crtc_funcs = {
 345         .set_config = drm_atomic_helper_set_config,
 346         .page_flip = drm_atomic_helper_page_flip,
 347         .destroy = sti_crtc_destroy,
 348         .set_property = sti_crtc_set_property,
 349         .reset = drm_atomic_helper_crtc_reset,
 350         .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
 351         .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
 352         .late_register = sti_crtc_late_register,
 353 };
 354
 355 bool sti_crtc_is_main(struct drm_crtc *crtc)
 356 {
 357         struct sti_mixer *mixer = to_sti_mixer(crtc);
 358
 359         if (mixer->id == STI_MIXER_MAIN)
 360                 return true;
 361
 362         return false;
 363 }
 364
 365 int sti_crtc_init(struct drm_device *drm_dev, struct sti_mixer *mixer,
 366                   struct drm_plane *primary, struct drm_plane *cursor)
 367 {
 368         struct drm_crtc *crtc = &mixer->drm_crtc;
 369         int res;
 370
 371         res = drm_crtc_init_with_planes(drm_dev, crtc, primary, cursor,
 372                                         &sti_crtc_funcs, NULL);
 373         if (res) {
 374                 DRM_ERROR("Can't initialze CRTC\n");
 375                 return -EINVAL;
 376         }
 377
 378         drm_crtc_helper_add(crtc, &sti_crtc_helper_funcs);
 379
 380         DRM_DEBUG_DRIVER("drm CRTC:%d mapped to %s\n",
 381                          crtc->base.id, sti_mixer_to_str(mixer));
 382
 383         return 0;
 384 }