drivers/gpu/drm/imx/ipuv3-plane.c

   1 /*
   2  * i.MX IPUv3 DP Overlay Planes
   3  *
   4  * Copyright (C) 2013 Philipp Zabel, Pengutronix
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version 2
   9  * of the License, or (at your option) any later version.
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  */
  15
  16 #include <drm/drmP.h>
  17 #include <drm/drm_atomic.h>
  18 #include <drm/drm_atomic_helper.h>
  19 #include <drm/drm_fb_cma_helper.h>
  20 #include <drm/drm_gem_cma_helper.h>
  21 #include <drm/drm_plane_helper.h>
  22
  23 #include "video/imx-ipu-v3.h"
  24 #include "ipuv3-plane.h"
  25
  26 static inline struct ipu_plane *to_ipu_plane(struct drm_plane *p)
  27 {
  28         return container_of(p, struct ipu_plane, base);
  29 }
  30
  31 static const uint32_t ipu_plane_formats[] = {
  32         DRM_FORMAT_ARGB1555,
  33         DRM_FORMAT_XRGB1555,
  34         DRM_FORMAT_ABGR1555,
  35         DRM_FORMAT_XBGR1555,
  36         DRM_FORMAT_RGBA5551,
  37         DRM_FORMAT_BGRA5551,
  38         DRM_FORMAT_ARGB4444,
  39         DRM_FORMAT_ARGB8888,
  40         DRM_FORMAT_XRGB8888,
  41         DRM_FORMAT_ABGR8888,
  42         DRM_FORMAT_XBGR8888,
  43         DRM_FORMAT_RGBA8888,
  44         DRM_FORMAT_RGBX8888,
  45         DRM_FORMAT_BGRA8888,
  46         DRM_FORMAT_BGRA8888,
  47         DRM_FORMAT_UYVY,
  48         DRM_FORMAT_VYUY,
  49         DRM_FORMAT_YUYV,
  50         DRM_FORMAT_YVYU,
  51         DRM_FORMAT_YUV420,
  52         DRM_FORMAT_YVU420,
  53         DRM_FORMAT_RGB565,
  54 };
  55
  56 int ipu_plane_irq(struct ipu_plane *ipu_plane)
  57 {
  58         return ipu_idmac_channel_irq(ipu_plane->ipu, ipu_plane->ipu_ch,
  59                                      IPU_IRQ_EOF);
  60 }
  61
  62 static inline unsigned long
  63 drm_plane_state_to_eba(struct drm_plane_state *state)
  64 {
  65         struct drm_framebuffer *fb = state->fb;
  66         struct drm_gem_cma_object *cma_obj;
  67
  68         cma_obj = drm_fb_cma_get_gem_obj(fb, 0);
  69         BUG_ON(!cma_obj);
  70
  71         return cma_obj->paddr + fb->offsets[0] +
  72                fb->pitches[0] * (state->src_y >> 16) +
  73                (fb->bits_per_pixel >> 3) * (state->src_x >> 16);
  74 }
  75
  76 static inline unsigned long
  77 drm_plane_state_to_ubo(struct drm_plane_state *state)
  78 {
  79         struct drm_framebuffer *fb = state->fb;
  80         struct drm_gem_cma_object *cma_obj;
  81         unsigned long eba = drm_plane_state_to_eba(state);
  82
  83         cma_obj = drm_fb_cma_get_gem_obj(fb, 1);
  84         BUG_ON(!cma_obj);
  85
  86         return cma_obj->paddr + fb->offsets[1] +
  87                fb->pitches[1] * (state->src_y >> 16) / 2 +
  88                (state->src_x >> 16) / 2 - eba;
  89 }
  90
  91 static inline unsigned long
  92 drm_plane_state_to_vbo(struct drm_plane_state *state)
  93 {
  94         struct drm_framebuffer *fb = state->fb;
  95         struct drm_gem_cma_object *cma_obj;
  96         unsigned long eba = drm_plane_state_to_eba(state);
  97
  98         cma_obj = drm_fb_cma_get_gem_obj(fb, 2);
  99         BUG_ON(!cma_obj);
 100
 101         return cma_obj->paddr + fb->offsets[2] +
 102                fb->pitches[2] * (state->src_y >> 16) / 2 +
 103                (state->src_x >> 16) / 2 - eba;
 104 }
 105
 106 static void ipu_plane_atomic_set_base(struct ipu_plane *ipu_plane)
 107 {
 108         struct drm_plane *plane = &ipu_plane->base;
 109         struct drm_plane_state *state = plane->state;
 110         struct drm_crtc_state *crtc_state = state->crtc->state;
 111         struct drm_framebuffer *fb = state->fb;
 112         unsigned long eba, ubo, vbo;
 113         int active;
 114
 115         eba = drm_plane_state_to_eba(state);
 116
 117         switch (fb->pixel_format) {
 118         case DRM_FORMAT_YUV420:
 119         case DRM_FORMAT_YVU420:
 120                 if (!drm_atomic_crtc_needs_modeset(crtc_state))
 121                         break;
 122
 123                 /*
 124                  * Multiplanar formats have to meet the following restrictions:
 125                  * - The (up to) three plane addresses are EBA, EBA+UBO, EBA+VBO
 126                  * - EBA, UBO and VBO are a multiple of 8
 127                  * - UBO and VBO are unsigned and not larger than 0xfffff8
 128                  * - Only EBA may be changed while scanout is active
 129                  * - The strides of U and V planes must be identical.
 130                  */
 131                 ubo = drm_plane_state_to_ubo(state);
 132                 vbo = drm_plane_state_to_vbo(state);
 133
 134                 if (fb->pixel_format == DRM_FORMAT_YUV420)
 135                         ipu_cpmem_set_yuv_planar_full(ipu_plane->ipu_ch,
 136                                                       fb->pitches[1], ubo, vbo);
 137                 else
 138                         ipu_cpmem_set_yuv_planar_full(ipu_plane->ipu_ch,
 139                                                       fb->pitches[1], vbo, ubo);
 140
 141                 dev_dbg(ipu_plane->base.dev->dev,
 142                         "phy = %lu %lu %lu, x = %d, y = %d", eba, ubo, vbo,
 143                         state->src_x >> 16, state->src_y >> 16);
 144                 break;
 145         default:
 146                 dev_dbg(ipu_plane->base.dev->dev, "phys = %lu, x = %d, y = %d",
 147                         eba, state->src_x >> 16, state->src_y >> 16);
 148
 149                 break;
 150         }
 151
 152         if (!drm_atomic_crtc_needs_modeset(crtc_state)) {
 153                 active = ipu_idmac_get_current_buffer(ipu_plane->ipu_ch);
 154                 ipu_cpmem_set_buffer(ipu_plane->ipu_ch, !active, eba);
 155                 ipu_idmac_select_buffer(ipu_plane->ipu_ch, !active);
 156         } else {
 157                 ipu_cpmem_set_buffer(ipu_plane->ipu_ch, 0, eba);
 158                 ipu_cpmem_set_buffer(ipu_plane->ipu_ch, 1, eba);
 159         }
 160 }
 161
 162 void ipu_plane_put_resources(struct ipu_plane *ipu_plane)
 163 {
 164         if (!IS_ERR_OR_NULL(ipu_plane->dp))
 165                 ipu_dp_put(ipu_plane->dp);
 166         if (!IS_ERR_OR_NULL(ipu_plane->dmfc))
 167                 ipu_dmfc_put(ipu_plane->dmfc);
 168         if (!IS_ERR_OR_NULL(ipu_plane->ipu_ch))
 169                 ipu_idmac_put(ipu_plane->ipu_ch);
 170 }
 171
 172 int ipu_plane_get_resources(struct ipu_plane *ipu_plane)
 173 {
 174         int ret;
 175
 176         ipu_plane->ipu_ch = ipu_idmac_get(ipu_plane->ipu, ipu_plane->dma);
 177         if (IS_ERR(ipu_plane->ipu_ch)) {
 178                 ret = PTR_ERR(ipu_plane->ipu_ch);
 179                 DRM_ERROR("failed to get idmac channel: %d\n", ret);
 180                 return ret;
 181         }
 182
 183         ipu_plane->dmfc = ipu_dmfc_get(ipu_plane->ipu, ipu_plane->dma);
 184         if (IS_ERR(ipu_plane->dmfc)) {
 185                 ret = PTR_ERR(ipu_plane->dmfc);
 186                 DRM_ERROR("failed to get dmfc: ret %d\n", ret);
 187                 goto err_out;
 188         }
 189
 190         if (ipu_plane->dp_flow >= 0) {
 191                 ipu_plane->dp = ipu_dp_get(ipu_plane->ipu, ipu_plane->dp_flow);
 192                 if (IS_ERR(ipu_plane->dp)) {
 193                         ret = PTR_ERR(ipu_plane->dp);
 194                         DRM_ERROR("failed to get dp flow: %d\n", ret);
 195                         goto err_out;
 196                 }
 197         }
 198
 199         return 0;
 200 err_out:
 201         ipu_plane_put_resources(ipu_plane);
 202
 203         return ret;
 204 }
 205
 206 static void ipu_plane_enable(struct ipu_plane *ipu_plane)
 207 {
 208         if (ipu_plane->dp)
 209                 ipu_dp_enable(ipu_plane->ipu);
 210         ipu_dmfc_enable_channel(ipu_plane->dmfc);
 211         ipu_idmac_enable_channel(ipu_plane->ipu_ch);
 212         if (ipu_plane->dp)
 213                 ipu_dp_enable_channel(ipu_plane->dp);
 214 }
 215
 216 static int ipu_disable_plane(struct drm_plane *plane)
 217 {
 218         struct ipu_plane *ipu_plane = to_ipu_plane(plane);
 219
 220         DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
 221
 222         ipu_idmac_wait_busy(ipu_plane->ipu_ch, 50);
 223
 224         if (ipu_plane->dp)
 225                 ipu_dp_disable_channel(ipu_plane->dp);
 226         ipu_idmac_disable_channel(ipu_plane->ipu_ch);
 227         ipu_dmfc_disable_channel(ipu_plane->dmfc);
 228         if (ipu_plane->dp)
 229                 ipu_dp_disable(ipu_plane->ipu);
 230
 231         return 0;
 232 }
 233
 234 static void ipu_plane_destroy(struct drm_plane *plane)
 235 {
 236         struct ipu_plane *ipu_plane = to_ipu_plane(plane);
 237
 238         DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
 239
 240         drm_plane_cleanup(plane);
 241         kfree(ipu_plane);
 242 }
 243
 244 static const struct drm_plane_funcs ipu_plane_funcs = {
 245         .update_plane   = drm_atomic_helper_update_plane,
 246         .disable_plane  = drm_atomic_helper_disable_plane,
 247         .destroy        = ipu_plane_destroy,
 248         .reset          = drm_atomic_helper_plane_reset,
 249         .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
 250         .atomic_destroy_state   = drm_atomic_helper_plane_destroy_state,
 251 };
 252
 253 static int ipu_plane_atomic_check(struct drm_plane *plane,
 254                                   struct drm_plane_state *state)
 255 {
 256         struct drm_plane_state *old_state = plane->state;
 257         struct drm_crtc_state *crtc_state;
 258         struct device *dev = plane->dev->dev;
 259         struct drm_framebuffer *fb = state->fb;
 260         struct drm_framebuffer *old_fb = old_state->fb;
 261         unsigned long eba, ubo, vbo, old_ubo, old_vbo;
 262         int hsub, vsub;
 263
 264         /* Ok to disable */
 265         if (!fb)
 266                 return 0;
 267
 268         if (!state->crtc)
 269                 return -EINVAL;
 270
 271         crtc_state =
 272                 drm_atomic_get_existing_crtc_state(state->state, state->crtc);
 273         if (WARN_ON(!crtc_state))
 274                 return -EINVAL;
 275
 276         /* CRTC should be enabled */
 277         if (!crtc_state->enable)
 278                 return -EINVAL;
 279
 280         /* no scaling */
 281         if (state->src_w >> 16 != state->crtc_w ||
 282             state->src_h >> 16 != state->crtc_h)
 283                 return -EINVAL;
 284
 285         switch (plane->type) {
 286         case DRM_PLANE_TYPE_PRIMARY:
 287                 /* full plane doesn't support partial off screen */
 288                 if (state->crtc_x || state->crtc_y ||
 289                     state->crtc_w != crtc_state->adjusted_mode.hdisplay ||
 290                     state->crtc_h != crtc_state->adjusted_mode.vdisplay)
 291                         return -EINVAL;
 292
 293                 /* full plane minimum width is 13 pixels */
 294                 if (state->crtc_w < 13)
 295                         return -EINVAL;
 296                 break;
 297         case DRM_PLANE_TYPE_OVERLAY:
 298                 if (state->crtc_x < 0 || state->crtc_y < 0)
 299                         return -EINVAL;
 300
 301                 if (state->crtc_x + state->crtc_w >
 302                     crtc_state->adjusted_mode.hdisplay)
 303                         return -EINVAL;
 304                 if (state->crtc_y + state->crtc_h >
 305                     crtc_state->adjusted_mode.vdisplay)
 306                         return -EINVAL;
 307                 break;
 308         default:
 309                 dev_warn(dev, "Unsupported plane type\n");
 310                 return -EINVAL;
 311         }
 312
 313         if (state->crtc_h < 2)
 314                 return -EINVAL;
 315
 316         /*
 317          * We support resizing active plane or changing its format by
 318          * forcing CRTC mode change in plane's ->atomic_check callback
 319          * and disabling all affected active planes in CRTC's ->atomic_disable
 320          * callback.  The planes will be reenabled in plane's ->atomic_update
 321          * callback.
 322          */
 323         if (old_fb && (state->src_w != old_state->src_w ||
 324                               state->src_h != old_state->src_h ||
 325                               fb->pixel_format != old_fb->pixel_format))
 326                 crtc_state->mode_changed = true;
 327
 328         eba = drm_plane_state_to_eba(state);
 329
 330         if (eba & 0x7)
 331                 return -EINVAL;
 332
 333         if (fb->pitches[0] < 1 || fb->pitches[0] > 16384)
 334                 return -EINVAL;
 335
 336         if (old_fb && fb->pitches[0] != old_fb->pitches[0])
 337                 crtc_state->mode_changed = true;
 338
 339         switch (fb->pixel_format) {
 340         case DRM_FORMAT_YUV420:
 341         case DRM_FORMAT_YVU420:
 342                 /*
 343                  * Multiplanar formats have to meet the following restrictions:
 344                  * - The (up to) three plane addresses are EBA, EBA+UBO, EBA+VBO
 345                  * - EBA, UBO and VBO are a multiple of 8
 346                  * - UBO and VBO are unsigned and not larger than 0xfffff8
 347                  * - Only EBA may be changed while scanout is active
 348                  * - The strides of U and V planes must be identical.
 349                  */
 350                 ubo = drm_plane_state_to_ubo(state);
 351                 vbo = drm_plane_state_to_vbo(state);
 352
 353                 if ((ubo & 0x7) || (vbo & 0x7))
 354                         return -EINVAL;
 355
 356                 if ((ubo > 0xfffff8) || (vbo > 0xfffff8))
 357                         return -EINVAL;
 358
 359                 if (old_fb &&
 360                     (old_fb->pixel_format == DRM_FORMAT_YUV420 ||
 361                      old_fb->pixel_format == DRM_FORMAT_YVU420)) {
 362                         old_ubo = drm_plane_state_to_ubo(old_state);
 363                         old_vbo = drm_plane_state_to_vbo(old_state);
 364                         if (ubo != old_ubo || vbo != old_vbo)
 365                                 return -EINVAL;
 366                 }
 367
 368                 if (fb->pitches[1] != fb->pitches[2])
 369                         return -EINVAL;
 370
 371                 if (fb->pitches[1] < 1 || fb->pitches[1] > 16384)
 372                         return -EINVAL;
 373
 374                 if (old_fb && old_fb->pitches[1] != fb->pitches[1])
 375                         crtc_state->mode_changed = true;
 376
 377                 /*
 378                  * The x/y offsets must be even in case of horizontal/vertical
 379                  * chroma subsampling.
 380                  */
 381                 hsub = drm_format_horz_chroma_subsampling(fb->pixel_format);
 382                 vsub = drm_format_vert_chroma_subsampling(fb->pixel_format);
 383                 if (((state->src_x >> 16) & (hsub - 1)) ||
 384                     ((state->src_y >> 16) & (vsub - 1)))
 385                         return -EINVAL;
 386         }
 387
 388         return 0;
 389 }
 390
 391 static void ipu_plane_atomic_disable(struct drm_plane *plane,
 392                                      struct drm_plane_state *old_state)
 393 {
 394         ipu_disable_plane(plane);
 395 }
 396
 397 static void ipu_plane_atomic_update(struct drm_plane *plane,
 398                                     struct drm_plane_state *old_state)
 399 {
 400         struct ipu_plane *ipu_plane = to_ipu_plane(plane);
 401         struct drm_plane_state *state = plane->state;
 402         enum ipu_color_space ics;
 403
 404         if (old_state->fb) {
 405                 struct drm_crtc_state *crtc_state = state->crtc->state;
 406
 407                 if (!drm_atomic_crtc_needs_modeset(crtc_state)) {
 408                         ipu_plane_atomic_set_base(ipu_plane);
 409                         return;
 410                 }
 411         }
 412
 413         switch (ipu_plane->dp_flow) {
 414         case IPU_DP_FLOW_SYNC_BG:
 415                 ipu_dp_setup_channel(ipu_plane->dp,
 416                                         IPUV3_COLORSPACE_RGB,
 417                                         IPUV3_COLORSPACE_RGB);
 418                 ipu_dp_set_global_alpha(ipu_plane->dp, true, 0, true);
 419                 break;
 420         case IPU_DP_FLOW_SYNC_FG:
 421                 ics = ipu_drm_fourcc_to_colorspace(state->fb->pixel_format);
 422                 ipu_dp_setup_channel(ipu_plane->dp, ics,
 423                                         IPUV3_COLORSPACE_UNKNOWN);
 424                 ipu_dp_set_window_pos(ipu_plane->dp, state->crtc_x,
 425                                         state->crtc_y);
 426                 /* Enable local alpha on partial plane */
 427                 switch (state->fb->pixel_format) {
 428                 case DRM_FORMAT_ARGB1555:
 429                 case DRM_FORMAT_ABGR1555:
 430                 case DRM_FORMAT_RGBA5551:
 431                 case DRM_FORMAT_BGRA5551:
 432                 case DRM_FORMAT_ARGB4444:
 433                 case DRM_FORMAT_ARGB8888:
 434                 case DRM_FORMAT_ABGR8888:
 435                 case DRM_FORMAT_RGBA8888:
 436                 case DRM_FORMAT_BGRA8888:
 437                         ipu_dp_set_global_alpha(ipu_plane->dp, false, 0, false);
 438                         break;
 439                 default:
 440                         ipu_dp_set_global_alpha(ipu_plane->dp, true, 0, true);
 441                         break;
 442                 }
 443         }
 444
 445         ipu_dmfc_config_wait4eot(ipu_plane->dmfc, state->crtc_w);
 446
 447         ipu_cpmem_zero(ipu_plane->ipu_ch);
 448         ipu_cpmem_set_resolution(ipu_plane->ipu_ch, state->src_w >> 16,
 449                                         state->src_h >> 16);
 450         ipu_cpmem_set_fmt(ipu_plane->ipu_ch, state->fb->pixel_format);
 451         ipu_cpmem_set_high_priority(ipu_plane->ipu_ch);
 452         ipu_idmac_set_double_buffer(ipu_plane->ipu_ch, 1);
 453         ipu_cpmem_set_stride(ipu_plane->ipu_ch, state->fb->pitches[0]);
 454         ipu_plane_atomic_set_base(ipu_plane);
 455         ipu_plane_enable(ipu_plane);
 456 }
 457
 458 static const struct drm_plane_helper_funcs ipu_plane_helper_funcs = {
 459         .atomic_check = ipu_plane_atomic_check,
 460         .atomic_disable = ipu_plane_atomic_disable,
 461         .atomic_update = ipu_plane_atomic_update,
 462 };
 463
 464 struct ipu_plane *ipu_plane_init(struct drm_device *dev, struct ipu_soc *ipu,
 465                                  int dma, int dp, unsigned int possible_crtcs,
 466                                  enum drm_plane_type type)
 467 {
 468         struct ipu_plane *ipu_plane;
 469         int ret;
 470
 471         DRM_DEBUG_KMS("channel %d, dp flow %d, possible_crtcs=0x%x\n",
 472                       dma, dp, possible_crtcs);
 473
 474         ipu_plane = kzalloc(sizeof(*ipu_plane), GFP_KERNEL);
 475         if (!ipu_plane) {
 476                 DRM_ERROR("failed to allocate plane\n");
 477                 return ERR_PTR(-ENOMEM);
 478         }
 479
 480         ipu_plane->ipu = ipu;
 481         ipu_plane->dma = dma;
 482         ipu_plane->dp_flow = dp;
 483
 484         ret = drm_universal_plane_init(dev, &ipu_plane->base, possible_crtcs,
 485                                        &ipu_plane_funcs, ipu_plane_formats,
 486                                        ARRAY_SIZE(ipu_plane_formats), type,
 487                                        NULL);
 488         if (ret) {
 489                 DRM_ERROR("failed to initialize plane\n");
 490                 kfree(ipu_plane);
 491                 return ERR_PTR(ret);
 492         }
 493
 494         drm_plane_helper_add(&ipu_plane->base, &ipu_plane_helper_funcs);
 495
 496         return ipu_plane;
 497 }