drivers/gpu/drm/sti/sti_crtc.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (C) STMicroelectronics SA 2014
   4  * Authors: Benjamin Gaignard <benjamin.gaignard@st.com>
   5  *          Fabien Dessenne <fabien.dessenne@st.com>
   6  *          for STMicroelectronics.
   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_atomic_enable(struct drm_crtc *crtc,
  24                                    struct drm_crtc_state *old_state)
  25 {
  26         struct sti_mixer *mixer = to_sti_mixer(crtc);
  27
  28         DRM_DEBUG_DRIVER("\n");
  29
  30         mixer->status = STI_MIXER_READY;
  31
  32         drm_crtc_vblank_on(crtc);
  33 }
  34
  35 static void sti_crtc_atomic_disable(struct drm_crtc *crtc,
  36                                     struct drm_crtc_state *old_state)
  37 {
  38         struct sti_mixer *mixer = to_sti_mixer(crtc);
  39
  40         DRM_DEBUG_DRIVER("\n");
  41
  42         mixer->status = STI_MIXER_DISABLING;
  43
  44         drm_crtc_wait_one_vblank(crtc);
  45 }
  46
  47 static int
  48 sti_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode)
  49 {
  50         struct sti_mixer *mixer = to_sti_mixer(crtc);
  51         struct device *dev = mixer->dev;
  52         struct sti_compositor *compo = dev_get_drvdata(dev);
  53         struct clk *compo_clk, *pix_clk;
  54         int rate = mode->clock * 1000;
  55
  56         DRM_DEBUG_KMS("CRTC:%d (%s) mode:%d (%s)\n",
  57                       crtc->base.id, sti_mixer_to_str(mixer),
  58                       mode->base.id, mode->name);
  59
  60         DRM_DEBUG_KMS("%d %d %d %d %d %d %d %d %d %d 0x%x 0x%x\n",
  61                       mode->vrefresh, mode->clock,
  62                       mode->hdisplay,
  63                       mode->hsync_start, mode->hsync_end,
  64                       mode->htotal,
  65                       mode->vdisplay,
  66                       mode->vsync_start, mode->vsync_end,
  67                       mode->vtotal, mode->type, mode->flags);
  68
  69         if (mixer->id == STI_MIXER_MAIN) {
  70                 compo_clk = compo->clk_compo_main;
  71                 pix_clk = compo->clk_pix_main;
  72         } else {
  73                 compo_clk = compo->clk_compo_aux;
  74                 pix_clk = compo->clk_pix_aux;
  75         }
  76
  77         /* Prepare and enable the compo IP clock */
  78         if (clk_prepare_enable(compo_clk)) {
  79                 DRM_INFO("Failed to prepare/enable compositor clk\n");
  80                 goto compo_error;
  81         }
  82
  83         /* Set rate and prepare/enable pixel clock */
  84         if (clk_set_rate(pix_clk, rate) < 0) {
  85                 DRM_ERROR("Cannot set rate (%dHz) for pix clk\n", rate);
  86                 goto pix_error;
  87         }
  88         if (clk_prepare_enable(pix_clk)) {
  89                 DRM_ERROR("Failed to prepare/enable pix clk\n");
  90                 goto pix_error;
  91         }
  92
  93         sti_vtg_set_config(compo->vtg[mixer->id], &crtc->mode);
  94
  95         if (sti_mixer_active_video_area(mixer, &crtc->mode)) {
  96                 DRM_ERROR("Can't set active video area\n");
  97                 goto mixer_error;
  98         }
  99
 100         return 0;
 101
 102 mixer_error:
 103         clk_disable_unprepare(pix_clk);
 104 pix_error:
 105         clk_disable_unprepare(compo_clk);
 106 compo_error:
 107         return -EINVAL;
 108 }
 109
 110 static void sti_crtc_disable(struct drm_crtc *crtc)
 111 {
 112         struct sti_mixer *mixer = to_sti_mixer(crtc);
 113         struct device *dev = mixer->dev;
 114         struct sti_compositor *compo = dev_get_drvdata(dev);
 115
 116         DRM_DEBUG_KMS("CRTC:%d (%s)\n", crtc->base.id, sti_mixer_to_str(mixer));
 117
 118         /* Disable Background */
 119         sti_mixer_set_background_status(mixer, false);
 120
 121         drm_crtc_vblank_off(crtc);
 122
 123         /* Disable pixel clock and compo IP clocks */
 124         if (mixer->id == STI_MIXER_MAIN) {
 125                 clk_disable_unprepare(compo->clk_pix_main);
 126                 clk_disable_unprepare(compo->clk_compo_main);
 127         } else {
 128                 clk_disable_unprepare(compo->clk_pix_aux);
 129                 clk_disable_unprepare(compo->clk_compo_aux);
 130         }
 131
 132         mixer->status = STI_MIXER_DISABLED;
 133 }
 134
 135 static void
 136 sti_crtc_mode_set_nofb(struct drm_crtc *crtc)
 137 {
 138         sti_crtc_mode_set(crtc, &crtc->state->adjusted_mode);
 139 }
 140
 141 static void sti_crtc_atomic_flush(struct drm_crtc *crtc,
 142                                   struct drm_crtc_state *old_crtc_state)
 143 {
 144         struct drm_device *drm_dev = crtc->dev;
 145         struct sti_mixer *mixer = to_sti_mixer(crtc);
 146         struct sti_compositor *compo = dev_get_drvdata(mixer->dev);
 147         struct drm_plane *p;
 148         struct drm_pending_vblank_event *event;
 149         unsigned long flags;
 150
 151         DRM_DEBUG_DRIVER("\n");
 152
 153         /* perform plane actions */
 154         list_for_each_entry(p, &drm_dev->mode_config.plane_list, head) {
 155                 struct sti_plane *plane = to_sti_plane(p);
 156
 157                 switch (plane->status) {
 158                 case STI_PLANE_UPDATED:
 159                         /* ignore update for other CRTC */
 160                         if (p->state->crtc != crtc)
 161                                 continue;
 162
 163                         /* update planes tag as updated */
 164                         DRM_DEBUG_DRIVER("update plane %s\n",
 165                                          sti_plane_to_str(plane));
 166
 167                         if (sti_mixer_set_plane_depth(mixer, plane)) {
 168                                 DRM_ERROR("Cannot set plane %s depth\n",
 169                                           sti_plane_to_str(plane));
 170                                 break;
 171                         }
 172
 173                         if (sti_mixer_set_plane_status(mixer, plane, true)) {
 174                                 DRM_ERROR("Cannot enable plane %s at mixer\n",
 175                                           sti_plane_to_str(plane));
 176                                 break;
 177                         }
 178
 179                         /* if plane is HQVDP_0 then commit the vid[0] */
 180                         if (plane->desc == STI_HQVDP_0)
 181                                 sti_vid_commit(compo->vid[0], p->state);
 182
 183                         plane->status = STI_PLANE_READY;
 184
 185                         break;
 186                 case STI_PLANE_DISABLING:
 187                         /* disabling sequence for planes tag as disabling */
 188                         DRM_DEBUG_DRIVER("disable plane %s from mixer\n",
 189                                          sti_plane_to_str(plane));
 190
 191                         if (sti_mixer_set_plane_status(mixer, plane, false)) {
 192                                 DRM_ERROR("Cannot disable plane %s at mixer\n",
 193                                           sti_plane_to_str(plane));
 194                                 continue;
 195                         }
 196
 197                         if (plane->desc == STI_CURSOR)
 198                                 /* tag plane status for disabled */
 199                                 plane->status = STI_PLANE_DISABLED;
 200                         else
 201                                 /* tag plane status for flushing */
 202                                 plane->status = STI_PLANE_FLUSHING;
 203
 204                         /* if plane is HQVDP_0 then disable the vid[0] */
 205                         if (plane->desc == STI_HQVDP_0)
 206                                 sti_vid_disable(compo->vid[0]);
 207
 208                         break;
 209                 default:
 210                         /* Other status case are not handled */
 211                         break;
 212                 }
 213         }
 214
 215         event = crtc->state->event;
 216         if (event) {
 217                 crtc->state->event = NULL;
 218
 219                 spin_lock_irqsave(&crtc->dev->event_lock, flags);
 220                 if (drm_crtc_vblank_get(crtc) == 0)
 221                         drm_crtc_arm_vblank_event(crtc, event);
 222                 else
 223                         drm_crtc_send_vblank_event(crtc, event);
 224                 spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
 225         }
 226 }
 227
 228 static const struct drm_crtc_helper_funcs sti_crtc_helper_funcs = {
 229         .mode_set_nofb = sti_crtc_mode_set_nofb,
 230         .atomic_flush = sti_crtc_atomic_flush,
 231         .atomic_enable = sti_crtc_atomic_enable,
 232         .atomic_disable = sti_crtc_atomic_disable,
 233 };
 234
 235 static void sti_crtc_destroy(struct drm_crtc *crtc)
 236 {
 237         DRM_DEBUG_KMS("\n");
 238         drm_crtc_cleanup(crtc);
 239 }
 240
 241 static int sti_crtc_set_property(struct drm_crtc *crtc,
 242                                  struct drm_property *property,
 243                                  uint64_t val)
 244 {
 245         DRM_DEBUG_KMS("\n");
 246         return 0;
 247 }
 248
 249 int sti_crtc_vblank_cb(struct notifier_block *nb,
 250                        unsigned long event, void *data)
 251 {
 252         struct sti_compositor *compo;
 253         struct drm_crtc *crtc = data;
 254         struct sti_mixer *mixer;
 255         unsigned int pipe;
 256
 257         pipe = drm_crtc_index(crtc);
 258         compo = container_of(nb, struct sti_compositor, vtg_vblank_nb[pipe]);
 259         mixer = compo->mixer[pipe];
 260
 261         if ((event != VTG_TOP_FIELD_EVENT) &&
 262             (event != VTG_BOTTOM_FIELD_EVENT)) {
 263                 DRM_ERROR("unknown event: %lu\n", event);
 264                 return -EINVAL;
 265         }
 266
 267         drm_crtc_handle_vblank(crtc);
 268
 269         if (mixer->status == STI_MIXER_DISABLING) {
 270                 struct drm_plane *p;
 271
 272                 /* Disable mixer only if all overlay planes (GDP and VDP)
 273                  * are disabled */
 274                 list_for_each_entry(p, &crtc->dev->mode_config.plane_list,
 275                                     head) {
 276                         struct sti_plane *plane = to_sti_plane(p);
 277
 278                         if ((plane->desc & STI_PLANE_TYPE_MASK) <= STI_VDP)
 279                                 if (plane->status != STI_PLANE_DISABLED)
 280                                         return 0;
 281                 }
 282                 sti_crtc_disable(crtc);
 283         }
 284
 285         return 0;
 286 }
 287
 288 int sti_crtc_enable_vblank(struct drm_device *dev, unsigned int pipe)
 289 {
 290         struct sti_private *dev_priv = dev->dev_private;
 291         struct sti_compositor *compo = dev_priv->compo;
 292         struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb[pipe];
 293         struct drm_crtc *crtc = &compo->mixer[pipe]->drm_crtc;
 294         struct sti_vtg *vtg = compo->vtg[pipe];
 295
 296         DRM_DEBUG_DRIVER("\n");
 297
 298         if (sti_vtg_register_client(vtg, vtg_vblank_nb, crtc)) {
 299                 DRM_ERROR("Cannot register VTG notifier\n");
 300                 return -EINVAL;
 301         }
 302
 303         return 0;
 304 }
 305
 306 void sti_crtc_disable_vblank(struct drm_device *drm_dev, unsigned int pipe)
 307 {
 308         struct sti_private *priv = drm_dev->dev_private;
 309         struct sti_compositor *compo = priv->compo;
 310         struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb[pipe];
 311         struct sti_vtg *vtg = compo->vtg[pipe];
 312
 313         DRM_DEBUG_DRIVER("\n");
 314
 315         if (sti_vtg_unregister_client(vtg, vtg_vblank_nb))
 316                 DRM_DEBUG_DRIVER("Warning: cannot unregister VTG notifier\n");
 317 }
 318
 319 static int sti_crtc_late_register(struct drm_crtc *crtc)
 320 {
 321         struct sti_mixer *mixer = to_sti_mixer(crtc);
 322         struct sti_compositor *compo = dev_get_drvdata(mixer->dev);
 323
 324         if (drm_crtc_index(crtc) == 0)
 325                 return sti_compositor_debugfs_init(compo, crtc->dev->primary);
 326
 327         return 0;
 328 }
 329
 330 static const struct drm_crtc_funcs sti_crtc_funcs = {
 331         .set_config = drm_atomic_helper_set_config,
 332         .page_flip = drm_atomic_helper_page_flip,
 333         .destroy = sti_crtc_destroy,
 334         .set_property = sti_crtc_set_property,
 335         .reset = drm_atomic_helper_crtc_reset,
 336         .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
 337         .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
 338         .late_register = sti_crtc_late_register,
 339 };
 340
 341 bool sti_crtc_is_main(struct drm_crtc *crtc)
 342 {
 343         struct sti_mixer *mixer = to_sti_mixer(crtc);
 344
 345         if (mixer->id == STI_MIXER_MAIN)
 346                 return true;
 347
 348         return false;
 349 }
 350
 351 int sti_crtc_init(struct drm_device *drm_dev, struct sti_mixer *mixer,
 352                   struct drm_plane *primary, struct drm_plane *cursor)
 353 {
 354         struct drm_crtc *crtc = &mixer->drm_crtc;
 355         int res;
 356
 357         res = drm_crtc_init_with_planes(drm_dev, crtc, primary, cursor,
 358                                         &sti_crtc_funcs, NULL);
 359         if (res) {
 360                 DRM_ERROR("Can't initialize CRTC\n");
 361                 return -EINVAL;
 362         }
 363
 364         drm_crtc_helper_add(crtc, &sti_crtc_helper_funcs);
 365
 366         DRM_DEBUG_DRIVER("drm CRTC:%d mapped to %s\n",
 367                          crtc->base.id, sti_mixer_to_str(mixer));
 368
 369         return 0;
 370 }