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 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 drm_device *drm_dev;
 258         struct sti_compositor *compo =
 259                 container_of(nb, struct sti_compositor, vtg_vblank_nb);
 260         int *crtc = data;
 261         unsigned long flags;
 262         struct sti_private *priv;
 263
 264         drm_dev = compo->mixer[*crtc]->drm_crtc.dev;
 265         priv = drm_dev->dev_private;
 266
 267         if ((event != VTG_TOP_FIELD_EVENT) &&
 268             (event != VTG_BOTTOM_FIELD_EVENT)) {
 269                 DRM_ERROR("unknown event: %lu\n", event);
 270                 return -EINVAL;
 271         }
 272
 273         drm_handle_vblank(drm_dev, *crtc);
 274
 275         spin_lock_irqsave(&drm_dev->event_lock, flags);
 276         if (compo->mixer[*crtc]->pending_event) {
 277                 drm_send_vblank_event(drm_dev, -1,
 278                                       compo->mixer[*crtc]->pending_event);
 279                 drm_vblank_put(drm_dev, *crtc);
 280                 compo->mixer[*crtc]->pending_event = NULL;
 281         }
 282         spin_unlock_irqrestore(&drm_dev->event_lock, flags);
 283
 284         if (compo->mixer[*crtc]->status == STI_MIXER_DISABLING) {
 285                 struct drm_plane *p;
 286
 287                 /* Disable mixer only if all overlay planes (GDP and VDP)
 288                  * are disabled */
 289                 list_for_each_entry(p, &drm_dev->mode_config.plane_list, head) {
 290                         struct sti_plane *plane = to_sti_plane(p);
 291
 292                         if ((plane->desc & STI_PLANE_TYPE_MASK) <= STI_VDP)
 293                                 if (plane->status != STI_PLANE_DISABLED)
 294                                         return 0;
 295                 }
 296                 sti_crtc_disable(&compo->mixer[*crtc]->drm_crtc);
 297         }
 298
 299         return 0;
 300 }
 301
 302 int sti_crtc_enable_vblank(struct drm_device *dev, int crtc)
 303 {
 304         struct sti_private *dev_priv = dev->dev_private;
 305         struct sti_compositor *compo = dev_priv->compo;
 306         struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb;
 307
 308         DRM_DEBUG_DRIVER("\n");
 309
 310         if (sti_vtg_register_client(crtc == STI_MIXER_MAIN ?
 311                         compo->vtg_main : compo->vtg_aux,
 312                         vtg_vblank_nb, crtc)) {
 313                 DRM_ERROR("Cannot register VTG notifier\n");
 314                 return -EINVAL;
 315         }
 316
 317         return 0;
 318 }
 319 EXPORT_SYMBOL(sti_crtc_enable_vblank);
 320
 321 void sti_crtc_disable_vblank(struct drm_device *drm_dev, int crtc)
 322 {
 323         struct sti_private *priv = drm_dev->dev_private;
 324         struct sti_compositor *compo = priv->compo;
 325         struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb;
 326
 327         DRM_DEBUG_DRIVER("\n");
 328
 329         if (sti_vtg_unregister_client(crtc == STI_MIXER_MAIN ?
 330                         compo->vtg_main : compo->vtg_aux, vtg_vblank_nb))
 331                 DRM_DEBUG_DRIVER("Warning: cannot unregister VTG notifier\n");
 332
 333         /* free the resources of the pending requests */
 334         if (compo->mixer[crtc]->pending_event) {
 335                 drm_vblank_put(drm_dev, crtc);
 336                 compo->mixer[crtc]->pending_event = NULL;
 337         }
 338 }
 339 EXPORT_SYMBOL(sti_crtc_disable_vblank);
 340
 341 static struct drm_crtc_funcs sti_crtc_funcs = {
 342         .set_config = drm_atomic_helper_set_config,
 343         .page_flip = drm_atomic_helper_page_flip,
 344         .destroy = sti_crtc_destroy,
 345         .set_property = sti_crtc_set_property,
 346         .reset = drm_atomic_helper_crtc_reset,
 347         .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
 348         .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
 349 };
 350
 351 bool sti_crtc_is_main(struct drm_crtc *crtc)
 352 {
 353         struct sti_mixer *mixer = to_sti_mixer(crtc);
 354
 355         if (mixer->id == STI_MIXER_MAIN)
 356                 return true;
 357
 358         return false;
 359 }
 360 EXPORT_SYMBOL(sti_crtc_is_main);
 361
 362 int sti_crtc_init(struct drm_device *drm_dev, struct sti_mixer *mixer,
 363                   struct drm_plane *primary, struct drm_plane *cursor)
 364 {
 365         struct drm_crtc *crtc = &mixer->drm_crtc;
 366         int res;
 367
 368         res = drm_crtc_init_with_planes(drm_dev, crtc, primary, cursor,
 369                                         &sti_crtc_funcs);
 370         if (res) {
 371                 DRM_ERROR("Can't initialze CRTC\n");
 372                 return -EINVAL;
 373         }
 374
 375         drm_crtc_helper_add(crtc, &sti_crtc_helper_funcs);
 376
 377         DRM_DEBUG_DRIVER("drm CRTC:%d mapped to %s\n",
 378                          crtc->base.id, sti_mixer_to_str(mixer));
 379
 380         return 0;
 381 }