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                                       struct drm_plane_state *old_state)
 108 {
 109         struct drm_plane *plane = &ipu_plane->base;
 110         struct drm_plane_state *state = plane->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 (old_state->fb)
 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 (old_state->fb) {
 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 void ipu_plane_disable(struct ipu_plane *ipu_plane)
 217 {
 218         ipu_idmac_wait_busy(ipu_plane->ipu_ch, 50);
 219
 220         if (ipu_plane->dp)
 221                 ipu_dp_disable_channel(ipu_plane->dp);
 222         ipu_idmac_disable_channel(ipu_plane->ipu_ch);
 223         ipu_dmfc_disable_channel(ipu_plane->dmfc);
 224         if (ipu_plane->dp)
 225                 ipu_dp_disable(ipu_plane->ipu);
 226 }
 227
 228 static int ipu_disable_plane(struct drm_plane *plane)
 229 {
 230         struct ipu_plane *ipu_plane = to_ipu_plane(plane);
 231
 232         DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
 233
 234         ipu_plane_disable(ipu_plane);
 235
 236         return 0;
 237 }
 238
 239 static void ipu_plane_destroy(struct drm_plane *plane)
 240 {
 241         struct ipu_plane *ipu_plane = to_ipu_plane(plane);
 242
 243         DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
 244
 245         ipu_disable_plane(plane);
 246         drm_plane_cleanup(plane);
 247         kfree(ipu_plane);
 248 }
 249
 250 static const struct drm_plane_funcs ipu_plane_funcs = {
 251         .update_plane   = drm_atomic_helper_update_plane,
 252         .disable_plane  = drm_atomic_helper_disable_plane,
 253         .destroy        = ipu_plane_destroy,
 254         .reset          = drm_atomic_helper_plane_reset,
 255         .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
 256         .atomic_destroy_state   = drm_atomic_helper_plane_destroy_state,
 257 };
 258
 259 static int ipu_plane_atomic_check(struct drm_plane *plane,
 260                                   struct drm_plane_state *state)
 261 {
 262         struct drm_plane_state *old_state = plane->state;
 263         struct drm_crtc_state *crtc_state;
 264         struct device *dev = plane->dev->dev;
 265         struct drm_framebuffer *fb = state->fb;
 266         struct drm_framebuffer *old_fb = old_state->fb;
 267         unsigned long eba, ubo, vbo, old_ubo, old_vbo;
 268
 269         /* Ok to disable */
 270         if (!fb)
 271                 return 0;
 272
 273         if (!state->crtc)
 274                 return -EINVAL;
 275
 276         crtc_state =
 277                 drm_atomic_get_existing_crtc_state(state->state, state->crtc);
 278         if (WARN_ON(!crtc_state))
 279                 return -EINVAL;
 280
 281         /* CRTC should be enabled */
 282         if (!crtc_state->enable)
 283                 return -EINVAL;
 284
 285         /* no scaling */
 286         if (state->src_w >> 16 != state->crtc_w ||
 287             state->src_h >> 16 != state->crtc_h)
 288                 return -EINVAL;
 289
 290         switch (plane->type) {
 291         case DRM_PLANE_TYPE_PRIMARY:
 292                 /* full plane doesn't support partial off screen */
 293                 if (state->crtc_x || state->crtc_y ||
 294                     state->crtc_w != crtc_state->adjusted_mode.hdisplay ||
 295                     state->crtc_h != crtc_state->adjusted_mode.vdisplay)
 296                         return -EINVAL;
 297
 298                 /* full plane minimum width is 13 pixels */
 299                 if (state->crtc_w < 13)
 300                         return -EINVAL;
 301                 break;
 302         case DRM_PLANE_TYPE_OVERLAY:
 303                 if (state->crtc_x < 0 || state->crtc_y < 0)
 304                         return -EINVAL;
 305
 306                 if (state->crtc_x + state->crtc_w >
 307                     crtc_state->adjusted_mode.hdisplay)
 308                         return -EINVAL;
 309                 if (state->crtc_y + state->crtc_h >
 310                     crtc_state->adjusted_mode.vdisplay)
 311                         return -EINVAL;
 312                 break;
 313         default:
 314                 dev_warn(dev, "Unsupported plane type\n");
 315                 return -EINVAL;
 316         }
 317
 318         if (state->crtc_h < 2)
 319                 return -EINVAL;
 320
 321         /*
 322          * since we cannot touch active IDMAC channels, we do not support
 323          * resizing the enabled plane or changing its format
 324          */
 325         if (old_fb && (state->src_w != old_state->src_w ||
 326                               state->src_h != old_state->src_h ||
 327                               fb->pixel_format != old_fb->pixel_format))
 328                 return -EINVAL;
 329
 330         eba = drm_plane_state_to_eba(state);
 331
 332         if (eba & 0x7)
 333                 return -EINVAL;
 334
 335         if (fb->pitches[0] < 1 || fb->pitches[0] > 16384)
 336                 return -EINVAL;
 337
 338         if (old_fb && fb->pitches[0] != old_fb->pitches[0])
 339                 return -EINVAL;
 340
 341         switch (fb->pixel_format) {
 342         case DRM_FORMAT_YUV420:
 343         case DRM_FORMAT_YVU420:
 344                 /*
 345                  * Multiplanar formats have to meet the following restrictions:
 346                  * - The (up to) three plane addresses are EBA, EBA+UBO, EBA+VBO
 347                  * - EBA, UBO and VBO are a multiple of 8
 348                  * - UBO and VBO are unsigned and not larger than 0xfffff8
 349                  * - Only EBA may be changed while scanout is active
 350                  * - The strides of U and V planes must be identical.
 351                  */
 352                 ubo = drm_plane_state_to_ubo(state);
 353                 vbo = drm_plane_state_to_vbo(state);
 354
 355                 if ((ubo & 0x7) || (vbo & 0x7))
 356                         return -EINVAL;
 357
 358                 if ((ubo > 0xfffff8) || (vbo > 0xfffff8))
 359                         return -EINVAL;
 360
 361                 if (old_fb) {
 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                         return -EINVAL;
 376         }
 377
 378         return 0;
 379 }
 380
 381 static void ipu_plane_atomic_disable(struct drm_plane *plane,
 382                                      struct drm_plane_state *old_state)
 383 {
 384         ipu_disable_plane(plane);
 385 }
 386
 387 static void ipu_plane_atomic_update(struct drm_plane *plane,
 388                                     struct drm_plane_state *old_state)
 389 {
 390         struct ipu_plane *ipu_plane = to_ipu_plane(plane);
 391         struct drm_plane_state *state = plane->state;
 392         enum ipu_color_space ics;
 393
 394         if (old_state->fb) {
 395                 ipu_plane_atomic_set_base(ipu_plane, old_state);
 396                 return;
 397         }
 398
 399         switch (ipu_plane->dp_flow) {
 400         case IPU_DP_FLOW_SYNC_BG:
 401                 ipu_dp_setup_channel(ipu_plane->dp,
 402                                         IPUV3_COLORSPACE_RGB,
 403                                         IPUV3_COLORSPACE_RGB);
 404                 ipu_dp_set_global_alpha(ipu_plane->dp, true, 0, true);
 405                 break;
 406         case IPU_DP_FLOW_SYNC_FG:
 407                 ics = ipu_drm_fourcc_to_colorspace(state->fb->pixel_format);
 408                 ipu_dp_setup_channel(ipu_plane->dp, ics,
 409                                         IPUV3_COLORSPACE_UNKNOWN);
 410                 ipu_dp_set_window_pos(ipu_plane->dp, state->crtc_x,
 411                                         state->crtc_y);
 412                 /* Enable local alpha on partial plane */
 413                 switch (state->fb->pixel_format) {
 414                 case DRM_FORMAT_ARGB1555:
 415                 case DRM_FORMAT_ABGR1555:
 416                 case DRM_FORMAT_RGBA5551:
 417                 case DRM_FORMAT_BGRA5551:
 418                 case DRM_FORMAT_ARGB4444:
 419                 case DRM_FORMAT_ARGB8888:
 420                 case DRM_FORMAT_ABGR8888:
 421                 case DRM_FORMAT_RGBA8888:
 422                 case DRM_FORMAT_BGRA8888:
 423                         ipu_dp_set_global_alpha(ipu_plane->dp, false, 0, false);
 424                         break;
 425                 default:
 426                         break;
 427                 }
 428         }
 429
 430         ipu_dmfc_config_wait4eot(ipu_plane->dmfc, state->crtc_w);
 431
 432         ipu_cpmem_zero(ipu_plane->ipu_ch);
 433         ipu_cpmem_set_resolution(ipu_plane->ipu_ch, state->src_w >> 16,
 434                                         state->src_h >> 16);
 435         ipu_cpmem_set_fmt(ipu_plane->ipu_ch, state->fb->pixel_format);
 436         ipu_cpmem_set_high_priority(ipu_plane->ipu_ch);
 437         ipu_idmac_set_double_buffer(ipu_plane->ipu_ch, 1);
 438         ipu_cpmem_set_stride(ipu_plane->ipu_ch, state->fb->pitches[0]);
 439         ipu_plane_atomic_set_base(ipu_plane, old_state);
 440         ipu_plane_enable(ipu_plane);
 441 }
 442
 443 static const struct drm_plane_helper_funcs ipu_plane_helper_funcs = {
 444         .atomic_check = ipu_plane_atomic_check,
 445         .atomic_disable = ipu_plane_atomic_disable,
 446         .atomic_update = ipu_plane_atomic_update,
 447 };
 448
 449 struct ipu_plane *ipu_plane_init(struct drm_device *dev, struct ipu_soc *ipu,
 450                                  int dma, int dp, unsigned int possible_crtcs,
 451                                  enum drm_plane_type type)
 452 {
 453         struct ipu_plane *ipu_plane;
 454         int ret;
 455
 456         DRM_DEBUG_KMS("channel %d, dp flow %d, possible_crtcs=0x%x\n",
 457                       dma, dp, possible_crtcs);
 458
 459         ipu_plane = kzalloc(sizeof(*ipu_plane), GFP_KERNEL);
 460         if (!ipu_plane) {
 461                 DRM_ERROR("failed to allocate plane\n");
 462                 return ERR_PTR(-ENOMEM);
 463         }
 464
 465         ipu_plane->ipu = ipu;
 466         ipu_plane->dma = dma;
 467         ipu_plane->dp_flow = dp;
 468
 469         ret = drm_universal_plane_init(dev, &ipu_plane->base, possible_crtcs,
 470                                        &ipu_plane_funcs, ipu_plane_formats,
 471                                        ARRAY_SIZE(ipu_plane_formats), type,
 472                                        NULL);
 473         if (ret) {
 474                 DRM_ERROR("failed to initialize plane\n");
 475                 kfree(ipu_plane);
 476                 return ERR_PTR(ret);
 477         }
 478
 479         drm_plane_helper_add(&ipu_plane->base, &ipu_plane_helper_funcs);
 480
 481         return ipu_plane;
 482 }