drivers/media/platform/vsp1/vsp1_wpf.c

   1 /*
   2  * vsp1_wpf.c  --  R-Car VSP1 Write Pixel Formatter
   3  *
   4  * Copyright (C) 2013-2014 Renesas Electronics Corporation
   5  *
   6  * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  */
  13
  14 #include <linux/device.h>
  15
  16 #include <media/v4l2-subdev.h>
  17
  18 #include "vsp1.h"
  19 #include "vsp1_dl.h"
  20 #include "vsp1_pipe.h"
  21 #include "vsp1_rwpf.h"
  22 #include "vsp1_video.h"
  23
  24 #define WPF_GEN2_MAX_WIDTH                      2048U
  25 #define WPF_GEN2_MAX_HEIGHT                     2048U
  26 #define WPF_GEN3_MAX_WIDTH                      8190U
  27 #define WPF_GEN3_MAX_HEIGHT                     8190U
  28
  29 /* -----------------------------------------------------------------------------
  30  * Device Access
  31  */
  32
  33 static inline void vsp1_wpf_write(struct vsp1_rwpf *wpf,
  34                                   struct vsp1_dl_list *dl, u32 reg, u32 data)
  35 {
  36         vsp1_dl_list_write(dl, reg + wpf->entity.index * VI6_WPF_OFFSET, data);
  37 }
  38
  39 /* -----------------------------------------------------------------------------
  40  * Controls
  41  */
  42
  43 enum wpf_flip_ctrl {
  44         WPF_CTRL_VFLIP = 0,
  45         WPF_CTRL_HFLIP = 1,
  46         WPF_CTRL_MAX,
  47 };
  48
  49 static int vsp1_wpf_s_ctrl(struct v4l2_ctrl *ctrl)
  50 {
  51         struct vsp1_rwpf *wpf =
  52                 container_of(ctrl->handler, struct vsp1_rwpf, ctrls);
  53         unsigned int i;
  54         u32 flip = 0;
  55
  56         switch (ctrl->id) {
  57         case V4L2_CID_HFLIP:
  58         case V4L2_CID_VFLIP:
  59                 for (i = 0; i < WPF_CTRL_MAX; ++i) {
  60                         if (wpf->flip.ctrls[i])
  61                                 flip |= wpf->flip.ctrls[i]->val ? BIT(i) : 0;
  62                 }
  63
  64                 spin_lock_irq(&wpf->flip.lock);
  65                 wpf->flip.pending = flip;
  66                 spin_unlock_irq(&wpf->flip.lock);
  67                 break;
  68
  69         default:
  70                 return -EINVAL;
  71         }
  72
  73         return 0;
  74 }
  75
  76 static const struct v4l2_ctrl_ops vsp1_wpf_ctrl_ops = {
  77         .s_ctrl = vsp1_wpf_s_ctrl,
  78 };
  79
  80 static int wpf_init_controls(struct vsp1_rwpf *wpf)
  81 {
  82         struct vsp1_device *vsp1 = wpf->entity.vsp1;
  83         unsigned int num_flip_ctrls;
  84
  85         spin_lock_init(&wpf->flip.lock);
  86
  87         if (wpf->entity.index != 0) {
  88                 /* Only WPF0 supports flipping. */
  89                 num_flip_ctrls = 0;
  90         } else if (vsp1->info->features & VSP1_HAS_WPF_HFLIP) {
  91                 /* When horizontal flip is supported the WPF implements two
  92                  * controls (horizontal flip and vertical flip).
  93                  */
  94                 num_flip_ctrls = 2;
  95         } else if (vsp1->info->features & VSP1_HAS_WPF_VFLIP) {
  96                 /* When only vertical flip is supported the WPF implements a
  97                  * single control (vertical flip).
  98                  */
  99                 num_flip_ctrls = 1;
 100         } else {
 101                 /* Otherwise flipping is not supported. */
 102                 num_flip_ctrls = 0;
 103         }
 104
 105         vsp1_rwpf_init_ctrls(wpf, num_flip_ctrls);
 106
 107         if (num_flip_ctrls >= 1) {
 108                 wpf->flip.ctrls[WPF_CTRL_VFLIP] =
 109                         v4l2_ctrl_new_std(&wpf->ctrls, &vsp1_wpf_ctrl_ops,
 110                                           V4L2_CID_VFLIP, 0, 1, 1, 0);
 111         }
 112
 113         if (num_flip_ctrls == 2) {
 114                 wpf->flip.ctrls[WPF_CTRL_HFLIP] =
 115                         v4l2_ctrl_new_std(&wpf->ctrls, &vsp1_wpf_ctrl_ops,
 116                                           V4L2_CID_HFLIP, 0, 1, 1, 0);
 117
 118                 v4l2_ctrl_cluster(2, wpf->flip.ctrls);
 119         }
 120
 121         if (wpf->ctrls.error) {
 122                 dev_err(vsp1->dev, "wpf%u: failed to initialize controls\n",
 123                         wpf->entity.index);
 124                 return wpf->ctrls.error;
 125         }
 126
 127         return 0;
 128 }
 129
 130 /* -----------------------------------------------------------------------------
 131  * V4L2 Subdevice Core Operations
 132  */
 133
 134 static int wpf_s_stream(struct v4l2_subdev *subdev, int enable)
 135 {
 136         struct vsp1_rwpf *wpf = to_rwpf(subdev);
 137         struct vsp1_device *vsp1 = wpf->entity.vsp1;
 138
 139         if (enable)
 140                 return 0;
 141
 142         /* Write to registers directly when stopping the stream as there will be
 143          * no pipeline run to apply the display list.
 144          */
 145         vsp1_write(vsp1, VI6_WPF_IRQ_ENB(wpf->entity.index), 0);
 146         vsp1_write(vsp1, wpf->entity.index * VI6_WPF_OFFSET +
 147                    VI6_WPF_SRCRPF, 0);
 148
 149         return 0;
 150 }
 151
 152 /* -----------------------------------------------------------------------------
 153  * V4L2 Subdevice Operations
 154  */
 155
 156 static const struct v4l2_subdev_video_ops wpf_video_ops = {
 157         .s_stream = wpf_s_stream,
 158 };
 159
 160 static const struct v4l2_subdev_ops wpf_ops = {
 161         .video  = &wpf_video_ops,
 162         .pad    = &vsp1_rwpf_pad_ops,
 163 };
 164
 165 /* -----------------------------------------------------------------------------
 166  * VSP1 Entity Operations
 167  */
 168
 169 static void vsp1_wpf_destroy(struct vsp1_entity *entity)
 170 {
 171         struct vsp1_rwpf *wpf = entity_to_rwpf(entity);
 172
 173         vsp1_dlm_destroy(wpf->dlm);
 174 }
 175
 176 static void wpf_configure(struct vsp1_entity *entity,
 177                           struct vsp1_pipeline *pipe,
 178                           struct vsp1_dl_list *dl,
 179                           enum vsp1_entity_params params)
 180 {
 181         struct vsp1_rwpf *wpf = to_rwpf(&entity->subdev);
 182         struct vsp1_device *vsp1 = wpf->entity.vsp1;
 183         const struct v4l2_mbus_framefmt *source_format;
 184         const struct v4l2_mbus_framefmt *sink_format;
 185         unsigned int i;
 186         u32 outfmt = 0;
 187         u32 srcrpf = 0;
 188
 189         if (params == VSP1_ENTITY_PARAMS_RUNTIME) {
 190                 const unsigned int mask = BIT(WPF_CTRL_VFLIP)
 191                                         | BIT(WPF_CTRL_HFLIP);
 192                 unsigned long flags;
 193
 194                 spin_lock_irqsave(&wpf->flip.lock, flags);
 195                 wpf->flip.active = (wpf->flip.active & ~mask)
 196                                  | (wpf->flip.pending & mask);
 197                 spin_unlock_irqrestore(&wpf->flip.lock, flags);
 198
 199                 outfmt = (wpf->alpha << VI6_WPF_OUTFMT_PDV_SHIFT) | wpf->outfmt;
 200
 201                 if (wpf->flip.active & BIT(WPF_CTRL_VFLIP))
 202                         outfmt |= VI6_WPF_OUTFMT_FLP;
 203                 if (wpf->flip.active & BIT(WPF_CTRL_HFLIP))
 204                         outfmt |= VI6_WPF_OUTFMT_HFLP;
 205
 206                 vsp1_wpf_write(wpf, dl, VI6_WPF_OUTFMT, outfmt);
 207                 return;
 208         }
 209
 210         sink_format = vsp1_entity_get_pad_format(&wpf->entity,
 211                                                  wpf->entity.config,
 212                                                  RWPF_PAD_SINK);
 213         source_format = vsp1_entity_get_pad_format(&wpf->entity,
 214                                                    wpf->entity.config,
 215                                                    RWPF_PAD_SOURCE);
 216
 217         if (params == VSP1_ENTITY_PARAMS_PARTITION) {
 218                 const struct v4l2_pix_format_mplane *format = &wpf->format;
 219                 struct vsp1_rwpf_memory mem = wpf->mem;
 220                 unsigned int flip = wpf->flip.active;
 221                 unsigned int width = source_format->width;
 222                 unsigned int height = source_format->height;
 223                 unsigned int offset;
 224
 225                 /*
 226                  * Cropping. The partition algorithm can split the image into
 227                  * multiple slices.
 228                  */
 229                 if (pipe->partitions > 1)
 230                         width = pipe->partition.width;
 231
 232                 vsp1_wpf_write(wpf, dl, VI6_WPF_HSZCLIP, VI6_WPF_SZCLIP_EN |
 233                                (0 << VI6_WPF_SZCLIP_OFST_SHIFT) |
 234                                (width << VI6_WPF_SZCLIP_SIZE_SHIFT));
 235                 vsp1_wpf_write(wpf, dl, VI6_WPF_VSZCLIP, VI6_WPF_SZCLIP_EN |
 236                                (0 << VI6_WPF_SZCLIP_OFST_SHIFT) |
 237                                (height << VI6_WPF_SZCLIP_SIZE_SHIFT));
 238
 239                 if (pipe->lif)
 240                         return;
 241
 242                 /*
 243                  * Update the memory offsets based on flipping configuration.
 244                  * The destination addresses point to the locations where the
 245                  * VSP starts writing to memory, which can be different corners
 246                  * of the image depending on vertical flipping.
 247                  */
 248                 if (pipe->partitions > 1) {
 249                         const struct vsp1_format_info *fmtinfo = wpf->fmtinfo;
 250
 251                         /*
 252                          * Horizontal flipping is handled through a line buffer
 253                          * and doesn't modify the start address, but still needs
 254                          * to be handled when image partitioning is in effect to
 255                          * order the partitions correctly.
 256                          */
 257                         if (flip & BIT(WPF_CTRL_HFLIP))
 258                                 offset = format->width - pipe->partition.left
 259                                         - pipe->partition.width;
 260                         else
 261                                 offset = pipe->partition.left;
 262
 263                         mem.addr[0] += offset * fmtinfo->bpp[0] / 8;
 264                         if (format->num_planes > 1) {
 265                                 mem.addr[1] += offset / fmtinfo->hsub
 266                                              * fmtinfo->bpp[1] / 8;
 267                                 mem.addr[2] += offset / fmtinfo->hsub
 268                                              * fmtinfo->bpp[2] / 8;
 269                         }
 270                 }
 271
 272                 if (flip & BIT(WPF_CTRL_VFLIP)) {
 273                         mem.addr[0] += (format->height - 1)
 274                                      * format->plane_fmt[0].bytesperline;
 275
 276                         if (format->num_planes > 1) {
 277                                 offset = (format->height / wpf->fmtinfo->vsub - 1)
 278                                        * format->plane_fmt[1].bytesperline;
 279                                 mem.addr[1] += offset;
 280                                 mem.addr[2] += offset;
 281                         }
 282                 }
 283
 284                 vsp1_wpf_write(wpf, dl, VI6_WPF_DSTM_ADDR_Y, mem.addr[0]);
 285                 vsp1_wpf_write(wpf, dl, VI6_WPF_DSTM_ADDR_C0, mem.addr[1]);
 286                 vsp1_wpf_write(wpf, dl, VI6_WPF_DSTM_ADDR_C1, mem.addr[2]);
 287                 return;
 288         }
 289
 290         /* Format */
 291         if (!pipe->lif) {
 292                 const struct v4l2_pix_format_mplane *format = &wpf->format;
 293                 const struct vsp1_format_info *fmtinfo = wpf->fmtinfo;
 294
 295                 outfmt = fmtinfo->hwfmt << VI6_WPF_OUTFMT_WRFMT_SHIFT;
 296
 297                 if (fmtinfo->alpha)
 298                         outfmt |= VI6_WPF_OUTFMT_PXA;
 299                 if (fmtinfo->swap_yc)
 300                         outfmt |= VI6_WPF_OUTFMT_SPYCS;
 301                 if (fmtinfo->swap_uv)
 302                         outfmt |= VI6_WPF_OUTFMT_SPUVS;
 303
 304                 /* Destination stride and byte swapping. */
 305                 vsp1_wpf_write(wpf, dl, VI6_WPF_DSTM_STRIDE_Y,
 306                                format->plane_fmt[0].bytesperline);
 307                 if (format->num_planes > 1)
 308                         vsp1_wpf_write(wpf, dl, VI6_WPF_DSTM_STRIDE_C,
 309                                        format->plane_fmt[1].bytesperline);
 310
 311                 vsp1_wpf_write(wpf, dl, VI6_WPF_DSWAP, fmtinfo->swap);
 312
 313                 if (vsp1->info->features & VSP1_HAS_WPF_HFLIP &&
 314                     wpf->entity.index == 0)
 315                         vsp1_wpf_write(wpf, dl, VI6_WPF_ROT_CTRL,
 316                                        VI6_WPF_ROT_CTRL_LN16 |
 317                                        (256 << VI6_WPF_ROT_CTRL_LMEM_WD_SHIFT));
 318         }
 319
 320         if (sink_format->code != source_format->code)
 321                 outfmt |= VI6_WPF_OUTFMT_CSC;
 322
 323         wpf->outfmt = outfmt;
 324
 325         vsp1_dl_list_write(dl, VI6_DPR_WPF_FPORCH(wpf->entity.index),
 326                            VI6_DPR_WPF_FPORCH_FP_WPFN);
 327
 328         vsp1_dl_list_write(dl, VI6_WPF_WRBCK_CTRL, 0);
 329
 330         /* Sources. If the pipeline has a single input and BRU is not used,
 331          * configure it as the master layer. Otherwise configure all
 332          * inputs as sub-layers and select the virtual RPF as the master
 333          * layer.
 334          */
 335         for (i = 0; i < vsp1->info->rpf_count; ++i) {
 336                 struct vsp1_rwpf *input = pipe->inputs[i];
 337
 338                 if (!input)
 339                         continue;
 340
 341                 srcrpf |= (!pipe->bru && pipe->num_inputs == 1)
 342                         ? VI6_WPF_SRCRPF_RPF_ACT_MST(input->entity.index)
 343                         : VI6_WPF_SRCRPF_RPF_ACT_SUB(input->entity.index);
 344         }
 345
 346         if (pipe->bru || pipe->num_inputs > 1)
 347                 srcrpf |= VI6_WPF_SRCRPF_VIRACT_MST;
 348
 349         vsp1_wpf_write(wpf, dl, VI6_WPF_SRCRPF, srcrpf);
 350
 351         /* Enable interrupts */
 352         vsp1_dl_list_write(dl, VI6_WPF_IRQ_STA(wpf->entity.index), 0);
 353         vsp1_dl_list_write(dl, VI6_WPF_IRQ_ENB(wpf->entity.index),
 354                            VI6_WFP_IRQ_ENB_DFEE);
 355 }
 356
 357 static const struct vsp1_entity_operations wpf_entity_ops = {
 358         .destroy = vsp1_wpf_destroy,
 359         .configure = wpf_configure,
 360 };
 361
 362 /* -----------------------------------------------------------------------------
 363  * Initialization and Cleanup
 364  */
 365
 366 struct vsp1_rwpf *vsp1_wpf_create(struct vsp1_device *vsp1, unsigned int index)
 367 {
 368         struct vsp1_rwpf *wpf;
 369         char name[6];
 370         int ret;
 371
 372         wpf = devm_kzalloc(vsp1->dev, sizeof(*wpf), GFP_KERNEL);
 373         if (wpf == NULL)
 374                 return ERR_PTR(-ENOMEM);
 375
 376         if (vsp1->info->gen == 2) {
 377                 wpf->max_width = WPF_GEN2_MAX_WIDTH;
 378                 wpf->max_height = WPF_GEN2_MAX_HEIGHT;
 379         } else {
 380                 wpf->max_width = WPF_GEN3_MAX_WIDTH;
 381                 wpf->max_height = WPF_GEN3_MAX_HEIGHT;
 382         }
 383
 384         wpf->entity.ops = &wpf_entity_ops;
 385         wpf->entity.type = VSP1_ENTITY_WPF;
 386         wpf->entity.index = index;
 387
 388         sprintf(name, "wpf.%u", index);
 389         ret = vsp1_entity_init(vsp1, &wpf->entity, name, 2, &wpf_ops,
 390                                MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER);
 391         if (ret < 0)
 392                 return ERR_PTR(ret);
 393
 394         /* Initialize the display list manager. */
 395         wpf->dlm = vsp1_dlm_create(vsp1, index, 64);
 396         if (!wpf->dlm) {
 397                 ret = -ENOMEM;
 398                 goto error;
 399         }
 400
 401         /* Initialize the control handler. */
 402         ret = wpf_init_controls(wpf);
 403         if (ret < 0) {
 404                 dev_err(vsp1->dev, "wpf%u: failed to initialize controls\n",
 405                         index);
 406                 goto error;
 407         }
 408
 409         v4l2_ctrl_handler_setup(&wpf->ctrls);
 410
 411         return wpf;
 412
 413 error:
 414         vsp1_entity_destroy(&wpf->entity);
 415         return ERR_PTR(ret);
 416 }