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_fb_cma_helper.h>
  18 #include <drm/drm_gem_cma_helper.h>
  19
  20 #include "video/imx-ipu-v3.h"
  21 #include "ipuv3-plane.h"
  22
  23 #define to_ipu_plane(x) container_of(x, struct ipu_plane, base)
  24
  25 static const uint32_t ipu_plane_formats[] = {
  26         DRM_FORMAT_ARGB1555,
  27         DRM_FORMAT_XRGB1555,
  28         DRM_FORMAT_ABGR1555,
  29         DRM_FORMAT_XBGR1555,
  30         DRM_FORMAT_RGBA5551,
  31         DRM_FORMAT_BGRA5551,
  32         DRM_FORMAT_ARGB4444,
  33         DRM_FORMAT_ARGB8888,
  34         DRM_FORMAT_XRGB8888,
  35         DRM_FORMAT_ABGR8888,
  36         DRM_FORMAT_XBGR8888,
  37         DRM_FORMAT_RGBA8888,
  38         DRM_FORMAT_RGBX8888,
  39         DRM_FORMAT_BGRA8888,
  40         DRM_FORMAT_BGRA8888,
  41         DRM_FORMAT_YUYV,
  42         DRM_FORMAT_YVYU,
  43         DRM_FORMAT_YUV420,
  44         DRM_FORMAT_YVU420,
  45 };
  46
  47 int ipu_plane_irq(struct ipu_plane *ipu_plane)
  48 {
  49         return ipu_idmac_channel_irq(ipu_plane->ipu, ipu_plane->ipu_ch,
  50                                      IPU_IRQ_EOF);
  51 }
  52
  53 static int calc_vref(struct drm_display_mode *mode)
  54 {
  55         unsigned long htotal, vtotal;
  56
  57         htotal = mode->htotal;
  58         vtotal = mode->vtotal;
  59
  60         if (!htotal || !vtotal)
  61                 return 60;
  62
  63         return DIV_ROUND_UP(mode->clock * 1000, vtotal * htotal);
  64 }
  65
  66 static inline int calc_bandwidth(int width, int height, unsigned int vref)
  67 {
  68         return width * height * vref;
  69 }
  70
  71 int ipu_plane_set_base(struct ipu_plane *ipu_plane, struct drm_framebuffer *fb,
  72                        int x, int y)
  73 {
  74         struct drm_gem_cma_object *cma_obj;
  75         unsigned long eba;
  76         int active;
  77
  78         cma_obj = drm_fb_cma_get_gem_obj(fb, 0);
  79         if (!cma_obj) {
  80                 DRM_DEBUG_KMS("entry is null.\n");
  81                 return -EFAULT;
  82         }
  83
  84         dev_dbg(ipu_plane->base.dev->dev, "phys = %pad, x = %d, y = %d",
  85                 &cma_obj->paddr, x, y);
  86
  87         eba = cma_obj->paddr + fb->offsets[0] +
  88               fb->pitches[0] * y + (fb->bits_per_pixel >> 3) * x;
  89
  90         if (ipu_plane->enabled) {
  91                 active = ipu_idmac_get_current_buffer(ipu_plane->ipu_ch);
  92                 ipu_cpmem_set_buffer(ipu_plane->ipu_ch, !active, eba);
  93                 ipu_idmac_select_buffer(ipu_plane->ipu_ch, !active);
  94         } else {
  95                 ipu_cpmem_set_buffer(ipu_plane->ipu_ch, 0, eba);
  96                 ipu_cpmem_set_buffer(ipu_plane->ipu_ch, 1, eba);
  97         }
  98
  99         /* cache offsets for subsequent pageflips */
 100         ipu_plane->x = x;
 101         ipu_plane->y = y;
 102
 103         return 0;
 104 }
 105
 106 int ipu_plane_mode_set(struct ipu_plane *ipu_plane, struct drm_crtc *crtc,
 107                        struct drm_display_mode *mode,
 108                        struct drm_framebuffer *fb, int crtc_x, int crtc_y,
 109                        unsigned int crtc_w, unsigned int crtc_h,
 110                        uint32_t src_x, uint32_t src_y,
 111                        uint32_t src_w, uint32_t src_h, bool interlaced)
 112 {
 113         struct device *dev = ipu_plane->base.dev->dev;
 114         int ret;
 115
 116         /* no scaling */
 117         if (src_w != crtc_w || src_h != crtc_h)
 118                 return -EINVAL;
 119
 120         /* clip to crtc bounds */
 121         if (crtc_x < 0) {
 122                 if (-crtc_x > crtc_w)
 123                         return -EINVAL;
 124                 src_x += -crtc_x;
 125                 src_w -= -crtc_x;
 126                 crtc_w -= -crtc_x;
 127                 crtc_x = 0;
 128         }
 129         if (crtc_y < 0) {
 130                 if (-crtc_y > crtc_h)
 131                         return -EINVAL;
 132                 src_y += -crtc_y;
 133                 src_h -= -crtc_y;
 134                 crtc_h -= -crtc_y;
 135                 crtc_y = 0;
 136         }
 137         if (crtc_x + crtc_w > mode->hdisplay) {
 138                 if (crtc_x > mode->hdisplay)
 139                         return -EINVAL;
 140                 crtc_w = mode->hdisplay - crtc_x;
 141                 src_w = crtc_w;
 142         }
 143         if (crtc_y + crtc_h > mode->vdisplay) {
 144                 if (crtc_y > mode->vdisplay)
 145                         return -EINVAL;
 146                 crtc_h = mode->vdisplay - crtc_y;
 147                 src_h = crtc_h;
 148         }
 149         /* full plane minimum width is 13 pixels */
 150         if (crtc_w < 13 && (ipu_plane->dp_flow != IPU_DP_FLOW_SYNC_FG))
 151                 return -EINVAL;
 152         if (crtc_h < 2)
 153                 return -EINVAL;
 154
 155         /*
 156          * since we cannot touch active IDMAC channels, we do not support
 157          * resizing the enabled plane or changing its format
 158          */
 159         if (ipu_plane->enabled) {
 160                 if (src_w != ipu_plane->w || src_h != ipu_plane->h ||
 161                     fb->pixel_format != ipu_plane->base.fb->pixel_format)
 162                         return -EINVAL;
 163
 164                 return ipu_plane_set_base(ipu_plane, fb, src_x, src_y);
 165         }
 166
 167         switch (ipu_plane->dp_flow) {
 168         case IPU_DP_FLOW_SYNC_BG:
 169                 ret = ipu_dp_setup_channel(ipu_plane->dp,
 170                                 IPUV3_COLORSPACE_RGB,
 171                                 IPUV3_COLORSPACE_RGB);
 172                 if (ret) {
 173                         dev_err(dev,
 174                                 "initializing display processor failed with %d\n",
 175                                 ret);
 176                         return ret;
 177                 }
 178                 ipu_dp_set_global_alpha(ipu_plane->dp, true, 0, true);
 179                 break;
 180         case IPU_DP_FLOW_SYNC_FG:
 181                 ipu_dp_setup_channel(ipu_plane->dp,
 182                                 ipu_drm_fourcc_to_colorspace(fb->pixel_format),
 183                                 IPUV3_COLORSPACE_UNKNOWN);
 184                 ipu_dp_set_window_pos(ipu_plane->dp, crtc_x, crtc_y);
 185                 /* Enable local alpha on partial plane */
 186                 switch (fb->pixel_format) {
 187                 case DRM_FORMAT_ARGB1555:
 188                 case DRM_FORMAT_ABGR1555:
 189                 case DRM_FORMAT_RGBA5551:
 190                 case DRM_FORMAT_BGRA5551:
 191                 case DRM_FORMAT_ARGB4444:
 192                 case DRM_FORMAT_ARGB8888:
 193                 case DRM_FORMAT_ABGR8888:
 194                 case DRM_FORMAT_RGBA8888:
 195                 case DRM_FORMAT_BGRA8888:
 196                         ipu_dp_set_global_alpha(ipu_plane->dp, false, 0, false);
 197                         break;
 198                 default:
 199                         break;
 200                 }
 201         }
 202
 203         ret = ipu_dmfc_init_channel(ipu_plane->dmfc, crtc_w);
 204         if (ret) {
 205                 dev_err(dev, "initializing dmfc channel failed with %d\n", ret);
 206                 return ret;
 207         }
 208
 209         ret = ipu_dmfc_alloc_bandwidth(ipu_plane->dmfc,
 210                         calc_bandwidth(crtc_w, crtc_h,
 211                                        calc_vref(mode)), 64);
 212         if (ret) {
 213                 dev_err(dev, "allocating dmfc bandwidth failed with %d\n", ret);
 214                 return ret;
 215         }
 216
 217         ipu_cpmem_zero(ipu_plane->ipu_ch);
 218         ipu_cpmem_set_resolution(ipu_plane->ipu_ch, src_w, src_h);
 219         ret = ipu_cpmem_set_fmt(ipu_plane->ipu_ch, fb->pixel_format);
 220         if (ret < 0) {
 221                 dev_err(dev, "unsupported pixel format 0x%08x\n",
 222                         fb->pixel_format);
 223                 return ret;
 224         }
 225         ipu_cpmem_set_high_priority(ipu_plane->ipu_ch);
 226         ipu_idmac_set_double_buffer(ipu_plane->ipu_ch, 1);
 227         ipu_cpmem_set_stride(ipu_plane->ipu_ch, fb->pitches[0]);
 228
 229         ret = ipu_plane_set_base(ipu_plane, fb, src_x, src_y);
 230         if (ret < 0)
 231                 return ret;
 232         if (interlaced)
 233                 ipu_cpmem_interlaced_scan(ipu_plane->ipu_ch, fb->pitches[0]);
 234
 235         ipu_plane->w = src_w;
 236         ipu_plane->h = src_h;
 237
 238         return 0;
 239 }
 240
 241 void ipu_plane_put_resources(struct ipu_plane *ipu_plane)
 242 {
 243         if (!IS_ERR_OR_NULL(ipu_plane->dp))
 244                 ipu_dp_put(ipu_plane->dp);
 245         if (!IS_ERR_OR_NULL(ipu_plane->dmfc))
 246                 ipu_dmfc_put(ipu_plane->dmfc);
 247         if (!IS_ERR_OR_NULL(ipu_plane->ipu_ch))
 248                 ipu_idmac_put(ipu_plane->ipu_ch);
 249 }
 250
 251 int ipu_plane_get_resources(struct ipu_plane *ipu_plane)
 252 {
 253         int ret;
 254
 255         ipu_plane->ipu_ch = ipu_idmac_get(ipu_plane->ipu, ipu_plane->dma);
 256         if (IS_ERR(ipu_plane->ipu_ch)) {
 257                 ret = PTR_ERR(ipu_plane->ipu_ch);
 258                 DRM_ERROR("failed to get idmac channel: %d\n", ret);
 259                 return ret;
 260         }
 261
 262         ipu_plane->dmfc = ipu_dmfc_get(ipu_plane->ipu, ipu_plane->dma);
 263         if (IS_ERR(ipu_plane->dmfc)) {
 264                 ret = PTR_ERR(ipu_plane->dmfc);
 265                 DRM_ERROR("failed to get dmfc: ret %d\n", ret);
 266                 goto err_out;
 267         }
 268
 269         if (ipu_plane->dp_flow >= 0) {
 270                 ipu_plane->dp = ipu_dp_get(ipu_plane->ipu, ipu_plane->dp_flow);
 271                 if (IS_ERR(ipu_plane->dp)) {
 272                         ret = PTR_ERR(ipu_plane->dp);
 273                         DRM_ERROR("failed to get dp flow: %d\n", ret);
 274                         goto err_out;
 275                 }
 276         }
 277
 278         return 0;
 279 err_out:
 280         ipu_plane_put_resources(ipu_plane);
 281
 282         return ret;
 283 }
 284
 285 void ipu_plane_enable(struct ipu_plane *ipu_plane)
 286 {
 287         if (ipu_plane->dp)
 288                 ipu_dp_enable(ipu_plane->ipu);
 289         ipu_dmfc_enable_channel(ipu_plane->dmfc);
 290         ipu_idmac_enable_channel(ipu_plane->ipu_ch);
 291         if (ipu_plane->dp)
 292                 ipu_dp_enable_channel(ipu_plane->dp);
 293
 294         ipu_plane->enabled = true;
 295 }
 296
 297 void ipu_plane_disable(struct ipu_plane *ipu_plane)
 298 {
 299         ipu_plane->enabled = false;
 300
 301         ipu_idmac_wait_busy(ipu_plane->ipu_ch, 50);
 302
 303         if (ipu_plane->dp)
 304                 ipu_dp_disable_channel(ipu_plane->dp);
 305         ipu_idmac_disable_channel(ipu_plane->ipu_ch);
 306         ipu_dmfc_disable_channel(ipu_plane->dmfc);
 307         if (ipu_plane->dp)
 308                 ipu_dp_disable(ipu_plane->ipu);
 309 }
 310
 311 /*
 312  * drm_plane API
 313  */
 314
 315 static int ipu_update_plane(struct drm_plane *plane, struct drm_crtc *crtc,
 316                             struct drm_framebuffer *fb, int crtc_x, int crtc_y,
 317                             unsigned int crtc_w, unsigned int crtc_h,
 318                             uint32_t src_x, uint32_t src_y,
 319                             uint32_t src_w, uint32_t src_h)
 320 {
 321         struct ipu_plane *ipu_plane = to_ipu_plane(plane);
 322         int ret = 0;
 323
 324         DRM_DEBUG_KMS("plane - %p\n", plane);
 325
 326         if (!ipu_plane->enabled)
 327                 ret = ipu_plane_get_resources(ipu_plane);
 328         if (ret < 0)
 329                 return ret;
 330
 331         ret = ipu_plane_mode_set(ipu_plane, crtc, &crtc->hwmode, fb,
 332                         crtc_x, crtc_y, crtc_w, crtc_h,
 333                         src_x >> 16, src_y >> 16, src_w >> 16, src_h >> 16,
 334                         false);
 335         if (ret < 0) {
 336                 ipu_plane_put_resources(ipu_plane);
 337                 return ret;
 338         }
 339
 340         if (crtc != plane->crtc)
 341                 dev_info(plane->dev->dev, "crtc change: %p -> %p\n",
 342                                 plane->crtc, crtc);
 343         plane->crtc = crtc;
 344
 345         if (!ipu_plane->enabled)
 346                 ipu_plane_enable(ipu_plane);
 347
 348         return 0;
 349 }
 350
 351 static int ipu_disable_plane(struct drm_plane *plane)
 352 {
 353         struct ipu_plane *ipu_plane = to_ipu_plane(plane);
 354
 355         DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
 356
 357         if (ipu_plane->enabled)
 358                 ipu_plane_disable(ipu_plane);
 359
 360         ipu_plane_put_resources(ipu_plane);
 361
 362         return 0;
 363 }
 364
 365 static void ipu_plane_destroy(struct drm_plane *plane)
 366 {
 367         struct ipu_plane *ipu_plane = to_ipu_plane(plane);
 368
 369         DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
 370
 371         ipu_disable_plane(plane);
 372         drm_plane_cleanup(plane);
 373         kfree(ipu_plane);
 374 }
 375
 376 static struct drm_plane_funcs ipu_plane_funcs = {
 377         .update_plane   = ipu_update_plane,
 378         .disable_plane  = ipu_disable_plane,
 379         .destroy        = ipu_plane_destroy,
 380 };
 381
 382 struct ipu_plane *ipu_plane_init(struct drm_device *dev, struct ipu_soc *ipu,
 383                                  int dma, int dp, unsigned int possible_crtcs,
 384                                  bool priv)
 385 {
 386         struct ipu_plane *ipu_plane;
 387         int ret;
 388
 389         DRM_DEBUG_KMS("channel %d, dp flow %d, possible_crtcs=0x%x\n",
 390                       dma, dp, possible_crtcs);
 391
 392         ipu_plane = kzalloc(sizeof(*ipu_plane), GFP_KERNEL);
 393         if (!ipu_plane) {
 394                 DRM_ERROR("failed to allocate plane\n");
 395                 return ERR_PTR(-ENOMEM);
 396         }
 397
 398         ipu_plane->ipu = ipu;
 399         ipu_plane->dma = dma;
 400         ipu_plane->dp_flow = dp;
 401
 402         ret = drm_plane_init(dev, &ipu_plane->base, possible_crtcs,
 403                              &ipu_plane_funcs, ipu_plane_formats,
 404                              ARRAY_SIZE(ipu_plane_formats),
 405                              priv);
 406         if (ret) {
 407                 DRM_ERROR("failed to initialize plane\n");
 408                 kfree(ipu_plane);
 409                 return ERR_PTR(ret);
 410         }
 411
 412         return ipu_plane;
 413 }