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_set_memory(struct vsp1_entity *entity, struct vsp1_dl_list *dl)
 177 {
 178         struct vsp1_rwpf *wpf = entity_to_rwpf(entity);
 179         const struct v4l2_pix_format_mplane *format = &wpf->format;
 180         struct vsp1_rwpf_memory mem = wpf->mem;
 181         unsigned int flip = wpf->flip.active;
 182         unsigned int offset;
 183
 184         /* Update the memory offsets based on flipping configuration. The
 185          * destination addresses point to the locations where the VSP starts
 186          * writing to memory, which can be different corners of the image
 187          * depending on vertical flipping. Horizontal flipping is handled
 188          * through a line buffer and doesn't modify the start address.
 189          */
 190         if (flip & BIT(WPF_CTRL_VFLIP)) {
 191                 mem.addr[0] += (format->height - 1)
 192                              * format->plane_fmt[0].bytesperline;
 193
 194                 if (format->num_planes > 1) {
 195                         offset = (format->height / wpf->fmtinfo->vsub - 1)
 196                                * format->plane_fmt[1].bytesperline;
 197                         mem.addr[1] += offset;
 198                         mem.addr[2] += offset;
 199                 }
 200         }
 201
 202         vsp1_wpf_write(wpf, dl, VI6_WPF_DSTM_ADDR_Y, mem.addr[0]);
 203         vsp1_wpf_write(wpf, dl, VI6_WPF_DSTM_ADDR_C0, mem.addr[1]);
 204         vsp1_wpf_write(wpf, dl, VI6_WPF_DSTM_ADDR_C1, mem.addr[2]);
 205 }
 206
 207 static void wpf_configure(struct vsp1_entity *entity,
 208                           struct vsp1_pipeline *pipe,
 209                           struct vsp1_dl_list *dl, bool full)
 210 {
 211         struct vsp1_rwpf *wpf = to_rwpf(&entity->subdev);
 212         struct vsp1_device *vsp1 = wpf->entity.vsp1;
 213         const struct v4l2_mbus_framefmt *source_format;
 214         const struct v4l2_mbus_framefmt *sink_format;
 215         const struct v4l2_rect *crop;
 216         unsigned int i;
 217         u32 outfmt = 0;
 218         u32 srcrpf = 0;
 219
 220         if (!full) {
 221                 const unsigned int mask = BIT(WPF_CTRL_VFLIP)
 222                                         | BIT(WPF_CTRL_HFLIP);
 223
 224                 spin_lock(&wpf->flip.lock);
 225                 wpf->flip.active = (wpf->flip.active & ~mask)
 226                                  | (wpf->flip.pending & mask);
 227                 spin_unlock(&wpf->flip.lock);
 228
 229                 outfmt = (wpf->alpha << VI6_WPF_OUTFMT_PDV_SHIFT) | wpf->outfmt;
 230
 231                 if (wpf->flip.active & BIT(WPF_CTRL_VFLIP))
 232                         outfmt |= VI6_WPF_OUTFMT_FLP;
 233                 if (wpf->flip.active & BIT(WPF_CTRL_HFLIP))
 234                         outfmt |= VI6_WPF_OUTFMT_HFLP;
 235
 236                 vsp1_wpf_write(wpf, dl, VI6_WPF_OUTFMT, outfmt);
 237                 return;
 238         }
 239
 240         /* Cropping */
 241         crop = vsp1_rwpf_get_crop(wpf, wpf->entity.config);
 242
 243         vsp1_wpf_write(wpf, dl, VI6_WPF_HSZCLIP, VI6_WPF_SZCLIP_EN |
 244                        (crop->left << VI6_WPF_SZCLIP_OFST_SHIFT) |
 245                        (crop->width << VI6_WPF_SZCLIP_SIZE_SHIFT));
 246         vsp1_wpf_write(wpf, dl, VI6_WPF_VSZCLIP, VI6_WPF_SZCLIP_EN |
 247                        (crop->top << VI6_WPF_SZCLIP_OFST_SHIFT) |
 248                        (crop->height << VI6_WPF_SZCLIP_SIZE_SHIFT));
 249
 250         /* Format */
 251         sink_format = vsp1_entity_get_pad_format(&wpf->entity,
 252                                                  wpf->entity.config,
 253                                                  RWPF_PAD_SINK);
 254         source_format = vsp1_entity_get_pad_format(&wpf->entity,
 255                                                    wpf->entity.config,
 256                                                    RWPF_PAD_SOURCE);
 257
 258         if (!pipe->lif) {
 259                 const struct v4l2_pix_format_mplane *format = &wpf->format;
 260                 const struct vsp1_format_info *fmtinfo = wpf->fmtinfo;
 261
 262                 outfmt = fmtinfo->hwfmt << VI6_WPF_OUTFMT_WRFMT_SHIFT;
 263
 264                 if (fmtinfo->alpha)
 265                         outfmt |= VI6_WPF_OUTFMT_PXA;
 266                 if (fmtinfo->swap_yc)
 267                         outfmt |= VI6_WPF_OUTFMT_SPYCS;
 268                 if (fmtinfo->swap_uv)
 269                         outfmt |= VI6_WPF_OUTFMT_SPUVS;
 270
 271                 /* Destination stride and byte swapping. */
 272                 vsp1_wpf_write(wpf, dl, VI6_WPF_DSTM_STRIDE_Y,
 273                                format->plane_fmt[0].bytesperline);
 274                 if (format->num_planes > 1)
 275                         vsp1_wpf_write(wpf, dl, VI6_WPF_DSTM_STRIDE_C,
 276                                        format->plane_fmt[1].bytesperline);
 277
 278                 vsp1_wpf_write(wpf, dl, VI6_WPF_DSWAP, fmtinfo->swap);
 279
 280                 if (vsp1->info->features & VSP1_HAS_WPF_HFLIP &&
 281                     wpf->entity.index == 0)
 282                         vsp1_wpf_write(wpf, dl, VI6_WPF_ROT_CTRL,
 283                                        VI6_WPF_ROT_CTRL_LN16 |
 284                                        (256 << VI6_WPF_ROT_CTRL_LMEM_WD_SHIFT));
 285         }
 286
 287         if (sink_format->code != source_format->code)
 288                 outfmt |= VI6_WPF_OUTFMT_CSC;
 289
 290         wpf->outfmt = outfmt;
 291
 292         vsp1_dl_list_write(dl, VI6_DPR_WPF_FPORCH(wpf->entity.index),
 293                            VI6_DPR_WPF_FPORCH_FP_WPFN);
 294
 295         vsp1_dl_list_write(dl, VI6_WPF_WRBCK_CTRL, 0);
 296
 297         /* Sources. If the pipeline has a single input and BRU is not used,
 298          * configure it as the master layer. Otherwise configure all
 299          * inputs as sub-layers and select the virtual RPF as the master
 300          * layer.
 301          */
 302         for (i = 0; i < vsp1->info->rpf_count; ++i) {
 303                 struct vsp1_rwpf *input = pipe->inputs[i];
 304
 305                 if (!input)
 306                         continue;
 307
 308                 srcrpf |= (!pipe->bru && pipe->num_inputs == 1)
 309                         ? VI6_WPF_SRCRPF_RPF_ACT_MST(input->entity.index)
 310                         : VI6_WPF_SRCRPF_RPF_ACT_SUB(input->entity.index);
 311         }
 312
 313         if (pipe->bru || pipe->num_inputs > 1)
 314                 srcrpf |= VI6_WPF_SRCRPF_VIRACT_MST;
 315
 316         vsp1_wpf_write(wpf, dl, VI6_WPF_SRCRPF, srcrpf);
 317
 318         /* Enable interrupts */
 319         vsp1_dl_list_write(dl, VI6_WPF_IRQ_STA(wpf->entity.index), 0);
 320         vsp1_dl_list_write(dl, VI6_WPF_IRQ_ENB(wpf->entity.index),
 321                            VI6_WFP_IRQ_ENB_FREE);
 322 }
 323
 324 static const struct vsp1_entity_operations wpf_entity_ops = {
 325         .destroy = vsp1_wpf_destroy,
 326         .set_memory = wpf_set_memory,
 327         .configure = wpf_configure,
 328 };
 329
 330 /* -----------------------------------------------------------------------------
 331  * Initialization and Cleanup
 332  */
 333
 334 struct vsp1_rwpf *vsp1_wpf_create(struct vsp1_device *vsp1, unsigned int index)
 335 {
 336         struct vsp1_rwpf *wpf;
 337         char name[6];
 338         int ret;
 339
 340         wpf = devm_kzalloc(vsp1->dev, sizeof(*wpf), GFP_KERNEL);
 341         if (wpf == NULL)
 342                 return ERR_PTR(-ENOMEM);
 343
 344         if (vsp1->info->gen == 2) {
 345                 wpf->max_width = WPF_GEN2_MAX_WIDTH;
 346                 wpf->max_height = WPF_GEN2_MAX_HEIGHT;
 347         } else {
 348                 wpf->max_width = WPF_GEN3_MAX_WIDTH;
 349                 wpf->max_height = WPF_GEN3_MAX_HEIGHT;
 350         }
 351
 352         wpf->entity.ops = &wpf_entity_ops;
 353         wpf->entity.type = VSP1_ENTITY_WPF;
 354         wpf->entity.index = index;
 355
 356         sprintf(name, "wpf.%u", index);
 357         ret = vsp1_entity_init(vsp1, &wpf->entity, name, 2, &wpf_ops,
 358                                MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER);
 359         if (ret < 0)
 360                 return ERR_PTR(ret);
 361
 362         /* Initialize the display list manager. */
 363         wpf->dlm = vsp1_dlm_create(vsp1, index, 4);
 364         if (!wpf->dlm) {
 365                 ret = -ENOMEM;
 366                 goto error;
 367         }
 368
 369         /* Initialize the control handler. */
 370         ret = wpf_init_controls(wpf);
 371         if (ret < 0) {
 372                 dev_err(vsp1->dev, "wpf%u: failed to initialize controls\n",
 373                         index);
 374                 goto error;
 375         }
 376
 377         v4l2_ctrl_handler_setup(&wpf->ctrls);
 378
 379         return wpf;
 380
 381 error:
 382         vsp1_entity_destroy(&wpf->entity);
 383         return ERR_PTR(ret);
 384 }