drivers/staging/imx-drm/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_XRGB1555,
  27         DRM_FORMAT_XBGR1555,
  28         DRM_FORMAT_ARGB8888,
  29         DRM_FORMAT_XRGB8888,
  30         DRM_FORMAT_ABGR8888,
  31         DRM_FORMAT_XBGR8888,
  32         DRM_FORMAT_YUYV,
  33         DRM_FORMAT_YVYU,
  34         DRM_FORMAT_YUV420,
  35         DRM_FORMAT_YVU420,
  36 };
  37
  38 int ipu_plane_irq(struct ipu_plane *ipu_plane)
  39 {
  40         return ipu_idmac_channel_irq(ipu_plane->ipu, ipu_plane->ipu_ch,
  41                                      IPU_IRQ_EOF);
  42 }
  43
  44 static int calc_vref(struct drm_display_mode *mode)
  45 {
  46         unsigned long htotal, vtotal;
  47
  48         htotal = mode->htotal;
  49         vtotal = mode->vtotal;
  50
  51         if (!htotal || !vtotal)
  52                 return 60;
  53
  54         return DIV_ROUND_UP(mode->clock * 1000, vtotal * htotal);
  55 }
  56
  57 static inline int calc_bandwidth(int width, int height, unsigned int vref)
  58 {
  59         return width * height * vref;
  60 }
  61
  62 int ipu_plane_set_base(struct ipu_plane *ipu_plane, struct drm_framebuffer *fb,
  63                        int x, int y)
  64 {
  65         struct drm_gem_cma_object *cma_obj;
  66         unsigned long eba;
  67
  68         cma_obj = drm_fb_cma_get_gem_obj(fb, 0);
  69         if (!cma_obj) {
  70                 DRM_DEBUG_KMS("entry is null.\n");
  71                 return -EFAULT;
  72         }
  73
  74         dev_dbg(ipu_plane->base.dev->dev, "phys = %pad, x = %d, y = %d",
  75                 &cma_obj->paddr, x, y);
  76
  77         ipu_cpmem_set_stride(ipu_plane->ipu_ch, fb->pitches[0]);
  78
  79         eba = cma_obj->paddr + fb->offsets[0] +
  80               fb->pitches[0] * y + (fb->bits_per_pixel >> 3) * x;
  81         ipu_cpmem_set_buffer(ipu_plane->ipu_ch, 0, eba);
  82         ipu_cpmem_set_buffer(ipu_plane->ipu_ch, 1, eba);
  83
  84         /* cache offsets for subsequent pageflips */
  85         ipu_plane->x = x;
  86         ipu_plane->y = y;
  87
  88         return 0;
  89 }
  90
  91 int ipu_plane_mode_set(struct ipu_plane *ipu_plane, struct drm_crtc *crtc,
  92                        struct drm_display_mode *mode,
  93                        struct drm_framebuffer *fb, int crtc_x, int crtc_y,
  94                        unsigned int crtc_w, unsigned int crtc_h,
  95                        uint32_t src_x, uint32_t src_y,
  96                        uint32_t src_w, uint32_t src_h)
  97 {
  98         struct device *dev = ipu_plane->base.dev->dev;
  99         int ret;
 100
 101         /* no scaling */
 102         if (src_w != crtc_w || src_h != crtc_h)
 103                 return -EINVAL;
 104
 105         /* clip to crtc bounds */
 106         if (crtc_x < 0) {
 107                 if (-crtc_x > crtc_w)
 108                         return -EINVAL;
 109                 src_x += -crtc_x;
 110                 src_w -= -crtc_x;
 111                 crtc_w -= -crtc_x;
 112                 crtc_x = 0;
 113         }
 114         if (crtc_y < 0) {
 115                 if (-crtc_y > crtc_h)
 116                         return -EINVAL;
 117                 src_y += -crtc_y;
 118                 src_h -= -crtc_y;
 119                 crtc_h -= -crtc_y;
 120                 crtc_y = 0;
 121         }
 122         if (crtc_x + crtc_w > mode->hdisplay) {
 123                 if (crtc_x > mode->hdisplay)
 124                         return -EINVAL;
 125                 crtc_w = mode->hdisplay - crtc_x;
 126                 src_w = crtc_w;
 127         }
 128         if (crtc_y + crtc_h > mode->vdisplay) {
 129                 if (crtc_y > mode->vdisplay)
 130                         return -EINVAL;
 131                 crtc_h = mode->vdisplay - crtc_y;
 132                 src_h = crtc_h;
 133         }
 134         /* full plane minimum width is 13 pixels */
 135         if (crtc_w < 13 && (ipu_plane->dp_flow != IPU_DP_FLOW_SYNC_FG))
 136                 return -EINVAL;
 137         if (crtc_h < 2)
 138                 return -EINVAL;
 139
 140         switch (ipu_plane->dp_flow) {
 141         case IPU_DP_FLOW_SYNC_BG:
 142                 ret = ipu_dp_setup_channel(ipu_plane->dp,
 143                                 IPUV3_COLORSPACE_RGB,
 144                                 IPUV3_COLORSPACE_RGB);
 145                 if (ret) {
 146                         dev_err(dev,
 147                                 "initializing display processor failed with %d\n",
 148                                 ret);
 149                         return ret;
 150                 }
 151                 ipu_dp_set_global_alpha(ipu_plane->dp, 1, 0, 1);
 152                 break;
 153         case IPU_DP_FLOW_SYNC_FG:
 154                 ipu_dp_setup_channel(ipu_plane->dp,
 155                                 ipu_drm_fourcc_to_colorspace(fb->pixel_format),
 156                                 IPUV3_COLORSPACE_UNKNOWN);
 157                 ipu_dp_set_window_pos(ipu_plane->dp, crtc_x, crtc_y);
 158                 break;
 159         }
 160
 161         ret = ipu_dmfc_init_channel(ipu_plane->dmfc, crtc_w);
 162         if (ret) {
 163                 dev_err(dev, "initializing dmfc channel failed with %d\n", ret);
 164                 return ret;
 165         }
 166
 167         ret = ipu_dmfc_alloc_bandwidth(ipu_plane->dmfc,
 168                         calc_bandwidth(crtc_w, crtc_h,
 169                                        calc_vref(mode)), 64);
 170         if (ret) {
 171                 dev_err(dev, "allocating dmfc bandwidth failed with %d\n", ret);
 172                 return ret;
 173         }
 174
 175         ipu_cpmem_zero(ipu_plane->ipu_ch);
 176         ipu_cpmem_set_resolution(ipu_plane->ipu_ch, src_w, src_h);
 177         ret = ipu_cpmem_set_fmt(ipu_plane->ipu_ch, fb->pixel_format);
 178         if (ret < 0) {
 179                 dev_err(dev, "unsupported pixel format 0x%08x\n",
 180                         fb->pixel_format);
 181                 return ret;
 182         }
 183         ipu_cpmem_set_high_priority(ipu_plane->ipu_ch);
 184
 185         ret = ipu_plane_set_base(ipu_plane, fb, src_x, src_y);
 186         if (ret < 0)
 187                 return ret;
 188
 189         return 0;
 190 }
 191
 192 void ipu_plane_put_resources(struct ipu_plane *ipu_plane)
 193 {
 194         if (!IS_ERR_OR_NULL(ipu_plane->dp))
 195                 ipu_dp_put(ipu_plane->dp);
 196         if (!IS_ERR_OR_NULL(ipu_plane->dmfc))
 197                 ipu_dmfc_put(ipu_plane->dmfc);
 198         if (!IS_ERR_OR_NULL(ipu_plane->ipu_ch))
 199                 ipu_idmac_put(ipu_plane->ipu_ch);
 200 }
 201
 202 int ipu_plane_get_resources(struct ipu_plane *ipu_plane)
 203 {
 204         int ret;
 205
 206         ipu_plane->ipu_ch = ipu_idmac_get(ipu_plane->ipu, ipu_plane->dma);
 207         if (IS_ERR(ipu_plane->ipu_ch)) {
 208                 ret = PTR_ERR(ipu_plane->ipu_ch);
 209                 DRM_ERROR("failed to get idmac channel: %d\n", ret);
 210                 return ret;
 211         }
 212
 213         ipu_plane->dmfc = ipu_dmfc_get(ipu_plane->ipu, ipu_plane->dma);
 214         if (IS_ERR(ipu_plane->dmfc)) {
 215                 ret = PTR_ERR(ipu_plane->dmfc);
 216                 DRM_ERROR("failed to get dmfc: ret %d\n", ret);
 217                 goto err_out;
 218         }
 219
 220         if (ipu_plane->dp_flow >= 0) {
 221                 ipu_plane->dp = ipu_dp_get(ipu_plane->ipu, ipu_plane->dp_flow);
 222                 if (IS_ERR(ipu_plane->dp)) {
 223                         ret = PTR_ERR(ipu_plane->dp);
 224                         DRM_ERROR("failed to get dp flow: %d\n", ret);
 225                         goto err_out;
 226                 }
 227         }
 228
 229         return 0;
 230 err_out:
 231         ipu_plane_put_resources(ipu_plane);
 232
 233         return ret;
 234 }
 235
 236 void ipu_plane_enable(struct ipu_plane *ipu_plane)
 237 {
 238         if (ipu_plane->dp)
 239                 ipu_dp_enable(ipu_plane->ipu);
 240         ipu_dmfc_enable_channel(ipu_plane->dmfc);
 241         ipu_idmac_enable_channel(ipu_plane->ipu_ch);
 242         if (ipu_plane->dp)
 243                 ipu_dp_enable_channel(ipu_plane->dp);
 244
 245         ipu_plane->enabled = true;
 246 }
 247
 248 void ipu_plane_disable(struct ipu_plane *ipu_plane)
 249 {
 250         ipu_plane->enabled = false;
 251
 252         ipu_idmac_wait_busy(ipu_plane->ipu_ch, 50);
 253
 254         if (ipu_plane->dp)
 255                 ipu_dp_disable_channel(ipu_plane->dp);
 256         ipu_idmac_disable_channel(ipu_plane->ipu_ch);
 257         ipu_dmfc_disable_channel(ipu_plane->dmfc);
 258         if (ipu_plane->dp)
 259                 ipu_dp_disable(ipu_plane->ipu);
 260 }
 261
 262 /*
 263  * drm_plane API
 264  */
 265
 266 static int ipu_update_plane(struct drm_plane *plane, struct drm_crtc *crtc,
 267                             struct drm_framebuffer *fb, int crtc_x, int crtc_y,
 268                             unsigned int crtc_w, unsigned int crtc_h,
 269                             uint32_t src_x, uint32_t src_y,
 270                             uint32_t src_w, uint32_t src_h)
 271 {
 272         struct ipu_plane *ipu_plane = to_ipu_plane(plane);
 273         int ret = 0;
 274
 275         DRM_DEBUG_KMS("plane - %p\n", plane);
 276
 277         if (!ipu_plane->enabled)
 278                 ret = ipu_plane_get_resources(ipu_plane);
 279         if (ret < 0)
 280                 return ret;
 281
 282         ret = ipu_plane_mode_set(ipu_plane, crtc, &crtc->hwmode, fb,
 283                         crtc_x, crtc_y, crtc_w, crtc_h,
 284                         src_x >> 16, src_y >> 16, src_w >> 16, src_h >> 16);
 285         if (ret < 0) {
 286                 ipu_plane_put_resources(ipu_plane);
 287                 return ret;
 288         }
 289
 290         if (crtc != plane->crtc)
 291                 dev_info(plane->dev->dev, "crtc change: %p -> %p\n",
 292                                 plane->crtc, crtc);
 293         plane->crtc = crtc;
 294
 295         if (!ipu_plane->enabled)
 296                 ipu_plane_enable(ipu_plane);
 297
 298         return 0;
 299 }
 300
 301 static int ipu_disable_plane(struct drm_plane *plane)
 302 {
 303         struct ipu_plane *ipu_plane = to_ipu_plane(plane);
 304
 305         DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
 306
 307         if (ipu_plane->enabled)
 308                 ipu_plane_disable(ipu_plane);
 309
 310         ipu_plane_put_resources(ipu_plane);
 311
 312         return 0;
 313 }
 314
 315 static void ipu_plane_destroy(struct drm_plane *plane)
 316 {
 317         struct ipu_plane *ipu_plane = to_ipu_plane(plane);
 318
 319         DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
 320
 321         ipu_disable_plane(plane);
 322         drm_plane_cleanup(plane);
 323         kfree(ipu_plane);
 324 }
 325
 326 static struct drm_plane_funcs ipu_plane_funcs = {
 327         .update_plane   = ipu_update_plane,
 328         .disable_plane  = ipu_disable_plane,
 329         .destroy        = ipu_plane_destroy,
 330 };
 331
 332 struct ipu_plane *ipu_plane_init(struct drm_device *dev, struct ipu_soc *ipu,
 333                                  int dma, int dp, unsigned int possible_crtcs,
 334                                  bool priv)
 335 {
 336         struct ipu_plane *ipu_plane;
 337         int ret;
 338
 339         DRM_DEBUG_KMS("channel %d, dp flow %d, possible_crtcs=0x%x\n",
 340                       dma, dp, possible_crtcs);
 341
 342         ipu_plane = kzalloc(sizeof(*ipu_plane), GFP_KERNEL);
 343         if (!ipu_plane) {
 344                 DRM_ERROR("failed to allocate plane\n");
 345                 return ERR_PTR(-ENOMEM);
 346         }
 347
 348         ipu_plane->ipu = ipu;
 349         ipu_plane->dma = dma;
 350         ipu_plane->dp_flow = dp;
 351
 352         ret = drm_plane_init(dev, &ipu_plane->base, possible_crtcs,
 353                              &ipu_plane_funcs, ipu_plane_formats,
 354                              ARRAY_SIZE(ipu_plane_formats),
 355                              priv);
 356         if (ret) {
 357                 DRM_ERROR("failed to initialize plane\n");
 358                 kfree(ipu_plane);
 359                 return ERR_PTR(ret);
 360         }
 361
 362         return ipu_plane;
 363 }