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