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         drm_mode_set_crtcinfo(adjusted_mode, CRTC_INTERLACE_HALVE_V);
  60         return true;
  61 }
  62
  63 static int
  64 sti_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode)
  65 {
  66         struct sti_mixer *mixer = to_sti_mixer(crtc);
  67         struct device *dev = mixer->dev;
  68         struct sti_compositor *compo = dev_get_drvdata(dev);
  69         struct clk *clk;
  70         int rate = mode->clock * 1000;
  71         int res;
  72
  73         DRM_DEBUG_KMS("CRTC:%d (%s) mode:%d (%s)\n",
  74                       crtc->base.id, sti_mixer_to_str(mixer),
  75                       mode->base.id, mode->name);
  76
  77         DRM_DEBUG_KMS("%d %d %d %d %d %d %d %d %d %d 0x%x 0x%x\n",
  78                       mode->vrefresh, mode->clock,
  79                       mode->hdisplay,
  80                       mode->hsync_start, mode->hsync_end,
  81                       mode->htotal,
  82                       mode->vdisplay,
  83                       mode->vsync_start, mode->vsync_end,
  84                       mode->vtotal, mode->type, mode->flags);
  85
  86         /* Set rate and prepare/enable pixel clock */
  87         if (mixer->id == STI_MIXER_MAIN)
  88                 clk = compo->clk_pix_main;
  89         else
  90                 clk = compo->clk_pix_aux;
  91
  92         res = clk_set_rate(clk, rate);
  93         if (res < 0) {
  94                 DRM_ERROR("Cannot set rate (%dHz) for pix clk\n", rate);
  95                 return -EINVAL;
  96         }
  97         if (clk_prepare_enable(clk)) {
  98                 DRM_ERROR("Failed to prepare/enable pix clk\n");
  99                 return -EINVAL;
 100         }
 101
 102         sti_vtg_set_config(mixer->id == STI_MIXER_MAIN ?
 103                         compo->vtg_main : compo->vtg_aux, &crtc->mode);
 104
 105         res = sti_mixer_active_video_area(mixer, &crtc->mode);
 106         if (res) {
 107                 DRM_ERROR("Can't set active video area\n");
 108                 return -EINVAL;
 109         }
 110
 111         return res;
 112 }
 113
 114 static void sti_crtc_disable(struct drm_crtc *crtc)
 115 {
 116         struct sti_mixer *mixer = to_sti_mixer(crtc);
 117         struct device *dev = mixer->dev;
 118         struct sti_compositor *compo = dev_get_drvdata(dev);
 119
 120         DRM_DEBUG_KMS("CRTC:%d (%s)\n", crtc->base.id, sti_mixer_to_str(mixer));
 121
 122         /* Disable Background */
 123         sti_mixer_set_background_status(mixer, false);
 124
 125         drm_crtc_vblank_off(crtc);
 126
 127         /* Disable pixel clock and compo IP clocks */
 128         if (mixer->id == STI_MIXER_MAIN) {
 129                 clk_disable_unprepare(compo->clk_pix_main);
 130                 clk_disable_unprepare(compo->clk_compo_main);
 131         } else {
 132                 clk_disable_unprepare(compo->clk_pix_aux);
 133                 clk_disable_unprepare(compo->clk_compo_aux);
 134         }
 135
 136         mixer->status = STI_MIXER_DISABLED;
 137 }
 138
 139 static void
 140 sti_crtc_mode_set_nofb(struct drm_crtc *crtc)
 141 {
 142         sti_crtc_enable(crtc);
 143         sti_crtc_mode_set(crtc, &crtc->state->adjusted_mode);
 144 }
 145
 146 static void sti_crtc_atomic_begin(struct drm_crtc *crtc,
 147                                   struct drm_crtc_state *old_crtc_state)
 148 {
 149         struct sti_mixer *mixer = to_sti_mixer(crtc);
 150
 151         if (crtc->state->event) {
 152                 crtc->state->event->pipe = drm_crtc_index(crtc);
 153
 154                 WARN_ON(drm_crtc_vblank_get(crtc) != 0);
 155
 156                 mixer->pending_event = crtc->state->event;
 157                 crtc->state->event = NULL;
 158         }
 159 }
 160
 161 static void sti_crtc_atomic_flush(struct drm_crtc *crtc,
 162                                   struct drm_crtc_state *old_crtc_state)
 163 {
 164         struct drm_device *drm_dev = crtc->dev;
 165         struct sti_mixer *mixer = to_sti_mixer(crtc);
 166         struct sti_compositor *compo = dev_get_drvdata(mixer->dev);
 167         struct drm_plane *p;
 168
 169         DRM_DEBUG_DRIVER("\n");
 170
 171         /* perform plane actions */
 172         list_for_each_entry(p, &drm_dev->mode_config.plane_list, head) {
 173                 struct sti_plane *plane = to_sti_plane(p);
 174
 175                 switch (plane->status) {
 176                 case STI_PLANE_UPDATED:
 177                         /* update planes tag as updated */
 178                         DRM_DEBUG_DRIVER("update plane %s\n",
 179                                          sti_plane_to_str(plane));
 180
 181                         if (sti_mixer_set_plane_depth(mixer, plane)) {
 182                                 DRM_ERROR("Cannot set plane %s depth\n",
 183                                           sti_plane_to_str(plane));
 184                                 break;
 185                         }
 186
 187                         if (sti_mixer_set_plane_status(mixer, plane, true)) {
 188                                 DRM_ERROR("Cannot enable plane %s at mixer\n",
 189                                           sti_plane_to_str(plane));
 190                                 break;
 191                         }
 192
 193                         /* if plane is HQVDP_0 then commit the vid[0] */
 194                         if (plane->desc == STI_HQVDP_0)
 195                                 sti_vid_commit(compo->vid[0], p->state);
 196
 197                         plane->status = STI_PLANE_READY;
 198
 199                         break;
 200                 case STI_PLANE_DISABLING:
 201                         /* disabling sequence for planes tag as disabling */
 202                         DRM_DEBUG_DRIVER("disable plane %s from mixer\n",
 203                                          sti_plane_to_str(plane));
 204
 205                         if (sti_mixer_set_plane_status(mixer, plane, false)) {
 206                                 DRM_ERROR("Cannot disable plane %s at mixer\n",
 207                                           sti_plane_to_str(plane));
 208                                 continue;
 209                         }
 210
 211                         if (plane->desc == STI_CURSOR)
 212                                 /* tag plane status for disabled */
 213                                 plane->status = STI_PLANE_DISABLED;
 214                         else
 215                                 /* tag plane status for flushing */
 216                                 plane->status = STI_PLANE_FLUSHING;
 217
 218                         /* if plane is HQVDP_0 then disable the vid[0] */
 219                         if (plane->desc == STI_HQVDP_0)
 220                                 sti_vid_disable(compo->vid[0]);
 221
 222                         break;
 223                 default:
 224                         /* Other status case are not handled */
 225                         break;
 226                 }
 227         }
 228 }
 229
 230 static const struct drm_crtc_helper_funcs sti_crtc_helper_funcs = {
 231         .enable = sti_crtc_enable,
 232         .disable = sti_crtc_disabling,
 233         .mode_fixup = sti_crtc_mode_fixup,
 234         .mode_set = drm_helper_crtc_mode_set,
 235         .mode_set_nofb = sti_crtc_mode_set_nofb,
 236         .mode_set_base = drm_helper_crtc_mode_set_base,
 237         .atomic_begin = sti_crtc_atomic_begin,
 238         .atomic_flush = sti_crtc_atomic_flush,
 239 };
 240
 241 static void sti_crtc_destroy(struct drm_crtc *crtc)
 242 {
 243         DRM_DEBUG_KMS("\n");
 244         drm_crtc_cleanup(crtc);
 245 }
 246
 247 static int sti_crtc_set_property(struct drm_crtc *crtc,
 248                                  struct drm_property *property,
 249                                  uint64_t val)
 250 {
 251         DRM_DEBUG_KMS("\n");
 252         return 0;
 253 }
 254
 255 int sti_crtc_vblank_cb(struct notifier_block *nb,
 256                        unsigned long event, void *data)
 257 {
 258         struct sti_compositor *compo =
 259                 container_of(nb, struct sti_compositor, vtg_vblank_nb);
 260         struct drm_crtc *crtc = data;
 261         struct sti_mixer *mixer;
 262         unsigned long flags;
 263         struct sti_private *priv;
 264         unsigned int pipe;
 265
 266         priv = crtc->dev->dev_private;
 267         pipe = drm_crtc_index(crtc);
 268         mixer = compo->mixer[pipe];
 269
 270         if ((event != VTG_TOP_FIELD_EVENT) &&
 271             (event != VTG_BOTTOM_FIELD_EVENT)) {
 272                 DRM_ERROR("unknown event: %lu\n", event);
 273                 return -EINVAL;
 274         }
 275
 276         drm_crtc_handle_vblank(crtc);
 277
 278         spin_lock_irqsave(&crtc->dev->event_lock, flags);
 279         if (mixer->pending_event) {
 280                 drm_crtc_send_vblank_event(crtc, mixer->pending_event);
 281                 drm_crtc_vblank_put(crtc);
 282                 mixer->pending_event = NULL;
 283         }
 284         spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
 285
 286         if (mixer->status == STI_MIXER_DISABLING) {
 287                 struct drm_plane *p;
 288
 289                 /* Disable mixer only if all overlay planes (GDP and VDP)
 290                  * are disabled */
 291                 list_for_each_entry(p, &crtc->dev->mode_config.plane_list,
 292                                     head) {
 293                         struct sti_plane *plane = to_sti_plane(p);
 294
 295                         if ((plane->desc & STI_PLANE_TYPE_MASK) <= STI_VDP)
 296                                 if (plane->status != STI_PLANE_DISABLED)
 297                                         return 0;
 298                 }
 299                 sti_crtc_disable(crtc);
 300         }
 301
 302         return 0;
 303 }
 304
 305 int sti_crtc_enable_vblank(struct drm_device *dev, unsigned int pipe)
 306 {
 307         struct sti_private *dev_priv = dev->dev_private;
 308         struct sti_compositor *compo = dev_priv->compo;
 309         struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb;
 310         struct drm_crtc *crtc = &compo->mixer[pipe]->drm_crtc;
 311
 312         DRM_DEBUG_DRIVER("\n");
 313
 314         if (sti_vtg_register_client(pipe == STI_MIXER_MAIN ?
 315                         compo->vtg_main : compo->vtg_aux,
 316                         vtg_vblank_nb, crtc)) {
 317                 DRM_ERROR("Cannot register VTG notifier\n");
 318                 return -EINVAL;
 319         }
 320
 321         return 0;
 322 }
 323
 324 void sti_crtc_disable_vblank(struct drm_device *drm_dev, unsigned int pipe)
 325 {
 326         struct sti_private *priv = drm_dev->dev_private;
 327         struct sti_compositor *compo = priv->compo;
 328         struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb;
 329         struct drm_crtc *crtc = &compo->mixer[pipe]->drm_crtc;
 330
 331         DRM_DEBUG_DRIVER("\n");
 332
 333         if (sti_vtg_unregister_client(pipe == STI_MIXER_MAIN ?
 334                         compo->vtg_main : compo->vtg_aux, vtg_vblank_nb))
 335                 DRM_DEBUG_DRIVER("Warning: cannot unregister VTG notifier\n");
 336
 337         /* free the resources of the pending requests */
 338         if (compo->mixer[pipe]->pending_event) {
 339                 drm_crtc_vblank_put(crtc);
 340                 compo->mixer[pipe]->pending_event = NULL;
 341         }
 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 };
 353
 354 bool sti_crtc_is_main(struct drm_crtc *crtc)
 355 {
 356         struct sti_mixer *mixer = to_sti_mixer(crtc);
 357
 358         if (mixer->id == STI_MIXER_MAIN)
 359                 return true;
 360
 361         return false;
 362 }
 363
 364 int sti_crtc_init(struct drm_device *drm_dev, struct sti_mixer *mixer,
 365                   struct drm_plane *primary, struct drm_plane *cursor)
 366 {
 367         struct drm_crtc *crtc = &mixer->drm_crtc;
 368         int res;
 369
 370         res = drm_crtc_init_with_planes(drm_dev, crtc, primary, cursor,
 371                                         &sti_crtc_funcs, NULL);
 372         if (res) {
 373                 DRM_ERROR("Can't initialze CRTC\n");
 374                 return -EINVAL;
 375         }
 376
 377         drm_crtc_helper_add(crtc, &sti_crtc_helper_funcs);
 378
 379         DRM_DEBUG_DRIVER("drm CRTC:%d mapped to %s\n",
 380                          crtc->base.id, sti_mixer_to_str(mixer));
 381
 382         return 0;
 383 }