kernel/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         struct device *dev = mixer->dev;
  27         struct sti_compositor *compo = dev_get_drvdata(dev);
  28
  29         DRM_DEBUG_DRIVER("\n");
  30
  31         mixer->status = STI_MIXER_READY;
  32
  33         /* Prepare and enable the compo IP clock */
  34         if (mixer->id == STI_MIXER_MAIN) {
  35                 if (clk_prepare_enable(compo->clk_compo_main))
  36                         DRM_INFO("Failed to prepare/enable compo_main clk\n");
  37         } else {
  38                 if (clk_prepare_enable(compo->clk_compo_aux))
  39                         DRM_INFO("Failed to prepare/enable compo_aux clk\n");
  40         }
  41
  42         drm_crtc_vblank_on(crtc);
  43 }
  44
  45 static void sti_crtc_disabling(struct drm_crtc *crtc)
  46 {
  47         struct sti_mixer *mixer = to_sti_mixer(crtc);
  48
  49         DRM_DEBUG_DRIVER("\n");
  50
  51         mixer->status = STI_MIXER_DISABLING;
  52 }
  53
  54 static bool sti_crtc_mode_fixup(struct drm_crtc *crtc,
  55                                 const struct drm_display_mode *mode,
  56                                 struct drm_display_mode *adjusted_mode)
  57 {
  58         /* accept the provided drm_display_mode, do not fix it up */
  59         return true;
  60 }
  61
  62 static int
  63 sti_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode)
  64 {
  65         struct sti_mixer *mixer = to_sti_mixer(crtc);
  66         struct device *dev = mixer->dev;
  67         struct sti_compositor *compo = dev_get_drvdata(dev);
  68         struct clk *clk;
  69         int rate = mode->clock * 1000;
  70         int res;
  71
  72         DRM_DEBUG_KMS("CRTC:%d (%s) mode:%d (%s)\n",
  73                       crtc->base.id, sti_mixer_to_str(mixer),
  74                       mode->base.id, mode->name);
  75
  76         DRM_DEBUG_KMS("%d %d %d %d %d %d %d %d %d %d 0x%x 0x%x\n",
  77                       mode->vrefresh, mode->clock,
  78                       mode->hdisplay,
  79                       mode->hsync_start, mode->hsync_end,
  80                       mode->htotal,
  81                       mode->vdisplay,
  82                       mode->vsync_start, mode->vsync_end,
  83                       mode->vtotal, mode->type, mode->flags);
  84
  85         /* Set rate and prepare/enable pixel clock */
  86         if (mixer->id == STI_MIXER_MAIN)
  87                 clk = compo->clk_pix_main;
  88         else
  89                 clk = compo->clk_pix_aux;
  90
  91         res = clk_set_rate(clk, rate);
  92         if (res < 0) {
  93                 DRM_ERROR("Cannot set rate (%dHz) for pix clk\n", rate);
  94                 return -EINVAL;
  95         }
  96         if (clk_prepare_enable(clk)) {
  97                 DRM_ERROR("Failed to prepare/enable pix clk\n");
  98                 return -EINVAL;
  99         }
 100
 101         sti_vtg_set_config(mixer->id == STI_MIXER_MAIN ?
 102                         compo->vtg_main : compo->vtg_aux, &crtc->mode);
 103
 104         res = sti_mixer_active_video_area(mixer, &crtc->mode);
 105         if (res) {
 106                 DRM_ERROR("Can't set active video area\n");
 107                 return -EINVAL;
 108         }
 109
 110         return res;
 111 }
 112
 113 static void sti_crtc_disable(struct drm_crtc *crtc)
 114 {
 115         struct sti_mixer *mixer = to_sti_mixer(crtc);
 116         struct device *dev = mixer->dev;
 117         struct sti_compositor *compo = dev_get_drvdata(dev);
 118
 119         DRM_DEBUG_KMS("CRTC:%d (%s)\n", crtc->base.id, sti_mixer_to_str(mixer));
 120
 121         /* Disable Background */
 122         sti_mixer_set_background_status(mixer, false);
 123
 124         drm_crtc_vblank_off(crtc);
 125
 126         /* Disable pixel clock and compo IP clocks */
 127         if (mixer->id == STI_MIXER_MAIN) {
 128                 clk_disable_unprepare(compo->clk_pix_main);
 129                 clk_disable_unprepare(compo->clk_compo_main);
 130         } else {
 131                 clk_disable_unprepare(compo->clk_pix_aux);
 132                 clk_disable_unprepare(compo->clk_compo_aux);
 133         }
 134
 135         mixer->status = STI_MIXER_DISABLED;
 136 }
 137
 138 static void
 139 sti_crtc_mode_set_nofb(struct drm_crtc *crtc)
 140 {
 141         sti_crtc_enable(crtc);
 142         sti_crtc_mode_set(crtc, &crtc->state->adjusted_mode);
 143 }
 144
 145 static void sti_crtc_atomic_begin(struct drm_crtc *crtc,
 146                                   struct drm_crtc_state *old_crtc_state)
 147 {
 148         struct sti_mixer *mixer = to_sti_mixer(crtc);
 149
 150         if (crtc->state->event) {
 151                 crtc->state->event->pipe = drm_crtc_index(crtc);
 152
 153                 WARN_ON(drm_crtc_vblank_get(crtc) != 0);
 154
 155                 mixer->pending_event = crtc->state->event;
 156                 crtc->state->event = NULL;
 157         }
 158 }
 159
 160 static void sti_crtc_atomic_flush(struct drm_crtc *crtc,
 161                                   struct drm_crtc_state *old_crtc_state)
 162 {
 163         struct drm_device *drm_dev = crtc->dev;
 164         struct sti_mixer *mixer = to_sti_mixer(crtc);
 165         struct sti_compositor *compo = dev_get_drvdata(mixer->dev);
 166         struct drm_plane *p;
 167
 168         DRM_DEBUG_DRIVER("\n");
 169
 170         /* perform plane actions */
 171         list_for_each_entry(p, &drm_dev->mode_config.plane_list, head) {
 172                 struct sti_plane *plane = to_sti_plane(p);
 173
 174                 switch (plane->status) {
 175                 case STI_PLANE_UPDATED:
 176                         /* update planes tag as updated */
 177                         DRM_DEBUG_DRIVER("update plane %s\n",
 178                                          sti_plane_to_str(plane));
 179
 180                         if (sti_mixer_set_plane_depth(mixer, plane)) {
 181                                 DRM_ERROR("Cannot set plane %s depth\n",
 182                                           sti_plane_to_str(plane));
 183                                 break;
 184                         }
 185
 186                         if (sti_mixer_set_plane_status(mixer, plane, true)) {
 187                                 DRM_ERROR("Cannot enable plane %s at mixer\n",
 188                                           sti_plane_to_str(plane));
 189                                 break;
 190                         }
 191
 192                         /* if plane is HQVDP_0 then commit the vid[0] */
 193                         if (plane->desc == STI_HQVDP_0)
 194                                 sti_vid_commit(compo->vid[0], p->state);
 195
 196                         plane->status = STI_PLANE_READY;
 197
 198                         break;
 199                 case STI_PLANE_DISABLING:
 200                         /* disabling sequence for planes tag as disabling */
 201                         DRM_DEBUG_DRIVER("disable plane %s from mixer\n",
 202                                          sti_plane_to_str(plane));
 203
 204                         if (sti_mixer_set_plane_status(mixer, plane, false)) {
 205                                 DRM_ERROR("Cannot disable plane %s at mixer\n",
 206                                           sti_plane_to_str(plane));
 207                                 continue;
 208                         }
 209
 210                         if (plane->desc == STI_CURSOR)
 211                                 /* tag plane status for disabled */
 212                                 plane->status = STI_PLANE_DISABLED;
 213                         else
 214                                 /* tag plane status for flushing */
 215                                 plane->status = STI_PLANE_FLUSHING;
 216
 217                         /* if plane is HQVDP_0 then disable the vid[0] */
 218                         if (plane->desc == STI_HQVDP_0)
 219                                 sti_vid_disable(compo->vid[0]);
 220
 221                         break;
 222                 default:
 223                         /* Other status case are not handled */
 224                         break;
 225                 }
 226         }
 227 }
 228
 229 static const struct drm_crtc_helper_funcs sti_crtc_helper_funcs = {
 230         .enable = sti_crtc_enable,
 231         .disable = sti_crtc_disabling,
 232         .mode_fixup = sti_crtc_mode_fixup,
 233         .mode_set = drm_helper_crtc_mode_set,
 234         .mode_set_nofb = sti_crtc_mode_set_nofb,
 235         .mode_set_base = drm_helper_crtc_mode_set_base,
 236         .atomic_begin = sti_crtc_atomic_begin,
 237         .atomic_flush = sti_crtc_atomic_flush,
 238 };
 239
 240 static void sti_crtc_destroy(struct drm_crtc *crtc)
 241 {
 242         DRM_DEBUG_KMS("\n");
 243         drm_crtc_cleanup(crtc);
 244 }
 245
 246 static int sti_crtc_set_property(struct drm_crtc *crtc,
 247                                  struct drm_property *property,
 248                                  uint64_t val)
 249 {
 250         DRM_DEBUG_KMS("\n");
 251         return 0;
 252 }
 253
 254 int sti_crtc_vblank_cb(struct notifier_block *nb,
 255                        unsigned long event, void *data)
 256 {
 257         struct sti_compositor *compo =
 258                 container_of(nb, struct sti_compositor, vtg_vblank_nb);
 259         struct drm_crtc *crtc = data;
 260         struct sti_mixer *mixer;
 261         unsigned long flags;
 262         struct sti_private *priv;
 263         unsigned int pipe;
 264
 265         priv = crtc->dev->dev_private;
 266         pipe = drm_crtc_index(crtc);
 267         mixer = compo->mixer[pipe];
 268
 269         if ((event != VTG_TOP_FIELD_EVENT) &&
 270             (event != VTG_BOTTOM_FIELD_EVENT)) {
 271                 DRM_ERROR("unknown event: %lu\n", event);
 272                 return -EINVAL;
 273         }
 274
 275         drm_crtc_handle_vblank(crtc);
 276
 277         spin_lock_irqsave(&crtc->dev->event_lock, flags);
 278         if (mixer->pending_event) {
 279                 drm_crtc_send_vblank_event(crtc, mixer->pending_event);
 280                 drm_crtc_vblank_put(crtc);
 281                 mixer->pending_event = NULL;
 282         }
 283         spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
 284
 285         if (mixer->status == STI_MIXER_DISABLING) {
 286                 struct drm_plane *p;
 287
 288                 /* Disable mixer only if all overlay planes (GDP and VDP)
 289                  * are disabled */
 290                 list_for_each_entry(p, &crtc->dev->mode_config.plane_list,
 291                                     head) {
 292                         struct sti_plane *plane = to_sti_plane(p);
 293
 294                         if ((plane->desc & STI_PLANE_TYPE_MASK) <= STI_VDP)
 295                                 if (plane->status != STI_PLANE_DISABLED)
 296                                         return 0;
 297                 }
 298                 sti_crtc_disable(crtc);
 299         }
 300
 301         return 0;
 302 }
 303
 304 int sti_crtc_enable_vblank(struct drm_device *dev, unsigned int pipe)
 305 {
 306         struct sti_private *dev_priv = dev->dev_private;
 307         struct sti_compositor *compo = dev_priv->compo;
 308         struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb;
 309         struct drm_crtc *crtc = &compo->mixer[pipe]->drm_crtc;
 310
 311         DRM_DEBUG_DRIVER("\n");
 312
 313         if (sti_vtg_register_client(pipe == STI_MIXER_MAIN ?
 314                         compo->vtg_main : compo->vtg_aux,
 315                         vtg_vblank_nb, crtc)) {
 316                 DRM_ERROR("Cannot register VTG notifier\n");
 317                 return -EINVAL;
 318         }
 319
 320         return 0;
 321 }
 322
 323 void sti_crtc_disable_vblank(struct drm_device *drm_dev, unsigned int pipe)
 324 {
 325         struct sti_private *priv = drm_dev->dev_private;
 326         struct sti_compositor *compo = priv->compo;
 327         struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb;
 328         struct drm_crtc *crtc = &compo->mixer[pipe]->drm_crtc;
 329
 330         DRM_DEBUG_DRIVER("\n");
 331
 332         if (sti_vtg_unregister_client(pipe == STI_MIXER_MAIN ?
 333                         compo->vtg_main : compo->vtg_aux, vtg_vblank_nb))
 334                 DRM_DEBUG_DRIVER("Warning: cannot unregister VTG notifier\n");
 335
 336         /* free the resources of the pending requests */
 337         if (compo->mixer[pipe]->pending_event) {
 338                 drm_crtc_vblank_put(crtc);
 339                 compo->mixer[pipe]->pending_event = NULL;
 340         }
 341 }
 342
 343 static const struct drm_crtc_funcs sti_crtc_funcs = {
 344         .set_config = drm_atomic_helper_set_config,
 345         .page_flip = drm_atomic_helper_page_flip,
 346         .destroy = sti_crtc_destroy,
 347         .set_property = sti_crtc_set_property,
 348         .reset = drm_atomic_helper_crtc_reset,
 349         .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
 350         .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
 351 };
 352
 353 bool sti_crtc_is_main(struct drm_crtc *crtc)
 354 {
 355         struct sti_mixer *mixer = to_sti_mixer(crtc);
 356
 357         if (mixer->id == STI_MIXER_MAIN)
 358                 return true;
 359
 360         return false;
 361 }
 362
 363 int sti_crtc_init(struct drm_device *drm_dev, struct sti_mixer *mixer,
 364                   struct drm_plane *primary, struct drm_plane *cursor)
 365 {
 366         struct drm_crtc *crtc = &mixer->drm_crtc;
 367         int res;
 368
 369         res = drm_crtc_init_with_planes(drm_dev, crtc, primary, cursor,
 370                                         &sti_crtc_funcs);
 371         if (res) {
 372                 DRM_ERROR("Can't initialze CRTC\n");
 373                 return -EINVAL;
 374         }
 375
 376         drm_crtc_helper_add(crtc, &sti_crtc_helper_funcs);
 377
 378         DRM_DEBUG_DRIVER("drm CRTC:%d mapped to %s\n",
 379                          crtc->base.id, sti_mixer_to_str(mixer));
 380
 381         return 0;
 382 }