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