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
  45 static int
  46 sti_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode)
  47 {
  48         struct sti_mixer *mixer = to_sti_mixer(crtc);
  49         struct device *dev = mixer->dev;
  50         struct sti_compositor *compo = dev_get_drvdata(dev);
  51         struct clk *compo_clk, *pix_clk;
  52         int rate = mode->clock * 1000;
  53
  54         DRM_DEBUG_KMS("CRTC:%d (%s) mode:%d (%s)\n",
  55                       crtc->base.id, sti_mixer_to_str(mixer),
  56                       mode->base.id, mode->name);
  57
  58         DRM_DEBUG_KMS("%d %d %d %d %d %d %d %d %d %d 0x%x 0x%x\n",
  59                       mode->vrefresh, mode->clock,
  60                       mode->hdisplay,
  61                       mode->hsync_start, mode->hsync_end,
  62                       mode->htotal,
  63                       mode->vdisplay,
  64                       mode->vsync_start, mode->vsync_end,
  65                       mode->vtotal, mode->type, mode->flags);
  66
  67         if (mixer->id == STI_MIXER_MAIN) {
  68                 compo_clk = compo->clk_compo_main;
  69                 pix_clk = compo->clk_pix_main;
  70         } else {
  71                 compo_clk = compo->clk_compo_aux;
  72                 pix_clk = compo->clk_pix_aux;
  73         }
  74
  75         /* Prepare and enable the compo IP clock */
  76         if (clk_prepare_enable(compo_clk)) {
  77                 DRM_INFO("Failed to prepare/enable compositor clk\n");
  78                 goto compo_error;
  79         }
  80
  81         /* Set rate and prepare/enable pixel clock */
  82         if (clk_set_rate(pix_clk, rate) < 0) {
  83                 DRM_ERROR("Cannot set rate (%dHz) for pix clk\n", rate);
  84                 goto pix_error;
  85         }
  86         if (clk_prepare_enable(pix_clk)) {
  87                 DRM_ERROR("Failed to prepare/enable pix clk\n");
  88                 goto pix_error;
  89         }
  90
  91         sti_vtg_set_config(compo->vtg[mixer->id], &crtc->mode);
  92
  93         if (sti_mixer_active_video_area(mixer, &crtc->mode)) {
  94                 DRM_ERROR("Can't set active video area\n");
  95                 goto mixer_error;
  96         }
  97
  98         return 0;
  99
 100 mixer_error:
 101         clk_disable_unprepare(pix_clk);
 102 pix_error:
 103         clk_disable_unprepare(compo_clk);
 104 compo_error:
 105         return -EINVAL;
 106 }
 107
 108 static void sti_crtc_disable(struct drm_crtc *crtc)
 109 {
 110         struct sti_mixer *mixer = to_sti_mixer(crtc);
 111         struct device *dev = mixer->dev;
 112         struct sti_compositor *compo = dev_get_drvdata(dev);
 113
 114         DRM_DEBUG_KMS("CRTC:%d (%s)\n", crtc->base.id, sti_mixer_to_str(mixer));
 115
 116         /* Disable Background */
 117         sti_mixer_set_background_status(mixer, false);
 118
 119         drm_crtc_vblank_off(crtc);
 120
 121         /* Disable pixel clock and compo IP clocks */
 122         if (mixer->id == STI_MIXER_MAIN) {
 123                 clk_disable_unprepare(compo->clk_pix_main);
 124                 clk_disable_unprepare(compo->clk_compo_main);
 125         } else {
 126                 clk_disable_unprepare(compo->clk_pix_aux);
 127                 clk_disable_unprepare(compo->clk_compo_aux);
 128         }
 129
 130         mixer->status = STI_MIXER_DISABLED;
 131 }
 132
 133 static void
 134 sti_crtc_mode_set_nofb(struct drm_crtc *crtc)
 135 {
 136         sti_crtc_mode_set(crtc, &crtc->state->adjusted_mode);
 137 }
 138
 139 static void sti_crtc_atomic_flush(struct drm_crtc *crtc,
 140                                   struct drm_crtc_state *old_crtc_state)
 141 {
 142         struct drm_device *drm_dev = crtc->dev;
 143         struct sti_mixer *mixer = to_sti_mixer(crtc);
 144         struct sti_compositor *compo = dev_get_drvdata(mixer->dev);
 145         struct drm_plane *p;
 146         struct drm_pending_vblank_event *event;
 147         unsigned long flags;
 148
 149         DRM_DEBUG_DRIVER("\n");
 150
 151         /* perform plane actions */
 152         list_for_each_entry(p, &drm_dev->mode_config.plane_list, head) {
 153                 struct sti_plane *plane = to_sti_plane(p);
 154
 155                 switch (plane->status) {
 156                 case STI_PLANE_UPDATED:
 157                         /* ignore update for other CRTC */
 158                         if (p->state->crtc != crtc)
 159                                 continue;
 160
 161                         /* update planes tag as updated */
 162                         DRM_DEBUG_DRIVER("update plane %s\n",
 163                                          sti_plane_to_str(plane));
 164
 165                         if (sti_mixer_set_plane_depth(mixer, plane)) {
 166                                 DRM_ERROR("Cannot set plane %s depth\n",
 167                                           sti_plane_to_str(plane));
 168                                 break;
 169                         }
 170
 171                         if (sti_mixer_set_plane_status(mixer, plane, true)) {
 172                                 DRM_ERROR("Cannot enable plane %s at mixer\n",
 173                                           sti_plane_to_str(plane));
 174                                 break;
 175                         }
 176
 177                         /* if plane is HQVDP_0 then commit the vid[0] */
 178                         if (plane->desc == STI_HQVDP_0)
 179                                 sti_vid_commit(compo->vid[0], p->state);
 180
 181                         plane->status = STI_PLANE_READY;
 182
 183                         break;
 184                 case STI_PLANE_DISABLING:
 185                         /* disabling sequence for planes tag as disabling */
 186                         DRM_DEBUG_DRIVER("disable plane %s from mixer\n",
 187                                          sti_plane_to_str(plane));
 188
 189                         if (sti_mixer_set_plane_status(mixer, plane, false)) {
 190                                 DRM_ERROR("Cannot disable plane %s at mixer\n",
 191                                           sti_plane_to_str(plane));
 192                                 continue;
 193                         }
 194
 195                         if (plane->desc == STI_CURSOR)
 196                                 /* tag plane status for disabled */
 197                                 plane->status = STI_PLANE_DISABLED;
 198                         else
 199                                 /* tag plane status for flushing */
 200                                 plane->status = STI_PLANE_FLUSHING;
 201
 202                         /* if plane is HQVDP_0 then disable the vid[0] */
 203                         if (plane->desc == STI_HQVDP_0)
 204                                 sti_vid_disable(compo->vid[0]);
 205
 206                         break;
 207                 default:
 208                         /* Other status case are not handled */
 209                         break;
 210                 }
 211         }
 212
 213         event = crtc->state->event;
 214         if (event) {
 215                 crtc->state->event = NULL;
 216
 217                 spin_lock_irqsave(&crtc->dev->event_lock, flags);
 218                 if (drm_crtc_vblank_get(crtc) == 0)
 219                         drm_crtc_arm_vblank_event(crtc, event);
 220                 else
 221                         drm_crtc_send_vblank_event(crtc, event);
 222                 spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
 223         }
 224 }
 225
 226 static const struct drm_crtc_helper_funcs sti_crtc_helper_funcs = {
 227         .mode_set_nofb = sti_crtc_mode_set_nofb,
 228         .atomic_flush = sti_crtc_atomic_flush,
 229         .atomic_enable = sti_crtc_atomic_enable,
 230         .atomic_disable = sti_crtc_atomic_disable,
 231 };
 232
 233 static void sti_crtc_destroy(struct drm_crtc *crtc)
 234 {
 235         DRM_DEBUG_KMS("\n");
 236         drm_crtc_cleanup(crtc);
 237 }
 238
 239 static int sti_crtc_set_property(struct drm_crtc *crtc,
 240                                  struct drm_property *property,
 241                                  uint64_t val)
 242 {
 243         DRM_DEBUG_KMS("\n");
 244         return 0;
 245 }
 246
 247 int sti_crtc_vblank_cb(struct notifier_block *nb,
 248                        unsigned long event, void *data)
 249 {
 250         struct sti_compositor *compo;
 251         struct drm_crtc *crtc = data;
 252         struct sti_mixer *mixer;
 253         struct sti_private *priv;
 254         unsigned int pipe;
 255
 256         priv = crtc->dev->dev_private;
 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 initialze 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 }