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